0.26.3 object info changes

16 files changed, 2486 insertions, 2467 deletions

diff --git a/org/meta_abstraction.org b/org/meta_abstraction.org
index f74c8d6..b1c08ad 100644
--- a/org/meta_abstraction.org
+++ b/org/meta_abstraction.org
@@ -247,7 +247,7 @@ pure auto obj_heading_ancestors(O)(
   O          obj,
   string[]   lv_ancestors_txt,
 ) {
-  switch (obj.heading_lev_markup) {
+  switch (obj.node.heading_lev_markup) {
   case 0:
     lv_ancestors_txt[0] = obj.text.to!string;
     foreach(k; 1..8) {
@@ -292,7 +292,7 @@ pure auto obj_heading_ancestors(O)(
     lv_ancestors_txt[7] = obj.text.to!string;
     goto default;
   default:
-    obj.heading_ancestors_text = lv_ancestors_txt.dup;
+    obj.tags.heading_ancestors_text = lv_ancestors_txt.dup;
   }
   return obj;
 }
@@ -343,7 +343,7 @@ pure auto obj_dom_structure_set_markup_tags(O)(
   debug(dom_magic_numbers) {
     writeln("marked up: ", lev, ": ", dom);
   }
-  obj.dom_markedup = dom.dup;
+  obj.node.dom_markedup = dom.dup;
   return obj;
 }
 #+END_SRC
@@ -393,7 +393,7 @@ pure auto obj_dom_set_collapsed_tags(O)(
   debug(dom_magic_numbers) {
     writeln("collapsed: ", lev, ": ", dom);
   }
-  obj.dom_collapsed = dom.dup;
+  obj.node.dom_collapsed = dom.dup;
   return obj;
 }
 #+END_SRC
@@ -500,29 +500,29 @@ auto heading_match_rgx = [
 ];
 string _anchor_tag;
 string toc_txt_;
-an_object["glossary_nugget"]            = "";
-an_object["blurb_nugget"]               = "";
-comp_obj_heading_                       = comp_obj_heading_.init;
-comp_obj_heading_.of_part               = "frontmatter";
-comp_obj_heading_.of_section            = "toc";
-comp_obj_heading_.is_of                 = "para";
-comp_obj_heading_.is_a                  = "heading";
-comp_obj_heading_.text                  = "Table of Contents";
-comp_obj_heading_.ocn                   = 0;
-comp_obj_heading_.obj_cite_number       = "";
-comp_obj_heading_.obj_cite_number_off   = "";
-comp_obj_heading_.obj_cite_number_type  = 0;
-comp_obj_heading_.segment_anchor_tag    = "toc";
-comp_obj_heading_.marked_up_level       = "1";
-comp_obj_heading_.heading_lev_markup    = 4;
-comp_obj_heading_.heading_lev_collapsed = 1;
-comp_obj_heading_.parent_ocn            = 1;
-comp_obj_heading_.parent_lev_markup     = 0;
-comp_obj_heading_.ptr_html_segnames     = html_segnames_ptr;
-comp_obj_heading_.anchor_tags           = ["toc"];
-comp_obj_heading_.dom_markedup          = [ 1, 1, 0, 0, 1, 0, 0, 0];
-comp_obj_heading_.dom_collapsed         = [ 1, 1, 1, 0, 0, 0, 0, 0];
-auto toc_head                           = comp_obj_heading_;
+an_object["glossary_nugget"]                 = "";
+an_object["blurb_nugget"]                    = "";
+comp_obj_heading_                            = comp_obj_heading_.init;
+comp_obj_heading_.typeinfo.of_part           = "frontmatter";
+comp_obj_heading_.typeinfo.of_section        = "toc";
+comp_obj_heading_.typeinfo.is_of             = "para";
+comp_obj_heading_.typeinfo.is_a              = "heading";
+comp_obj_heading_.text                       = "Table of Contents";
+comp_obj_heading_.node.ocn                   = 0;
+comp_obj_heading_.node.obj_cite_number       = "";
+comp_obj_heading_.misc.obj_cite_number_off   = "";
+comp_obj_heading_.misc.obj_cite_number_type  = 0;
+comp_obj_heading_.tags.segment_anchor_tag    = "toc";
+comp_obj_heading_.node.marked_up_level       = "1";
+comp_obj_heading_.node.heading_lev_markup    = 4;
+comp_obj_heading_.node.heading_lev_collapsed = 1;
+comp_obj_heading_.node.parent_ocn            = 1;
+comp_obj_heading_.node.parent_lev_markup     = 0;
+comp_obj_heading_.ptr.html_segnames          = html_segnames_ptr;
+comp_obj_heading_.tags.anchor_tags           = ["toc"];
+comp_obj_heading_.node.dom_markedup          = [ 1, 1, 0, 0, 1, 0, 0, 0];
+comp_obj_heading_.node.dom_collapsed         = [ 1, 1, 1, 0, 0, 0, 0, 0];
+auto toc_head                                = comp_obj_heading_;
 html_segnames_ptr_cntr++;
 the_table_of_contents_section = [
   "seg": [toc_head],
@@ -679,60 +679,60 @@ if there is a glossary section you need to:
     line_occur["para"] = State.off;
     an_object_key="glossary_nugget"; //
     if (line.matchFirst(rgx.heading_glossary)) {
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "backmatter";
-      comp_obj_heading_.of_section            = "glossary";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "Glossary";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.segment_anchor_tag    = "_part_glossary";
-      comp_obj_heading_.marked_up_level       = "B";
-      comp_obj_heading_.heading_lev_markup    = 1;
-      comp_obj_heading_.heading_lev_collapsed = 1;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      comp_obj_heading_.dom_markedup          = [ 1, 1, 0, 0, 0, 0, 0, 0];
-      comp_obj_heading_.dom_collapsed         = [ 1, 1, 0, 0, 0, 0, 0, 0];
-      the_glossary_section                    ~= comp_obj_heading_;
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "backmatter";
-      comp_obj_heading_.of_section            = "glossary";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "Glossary";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.segment_anchor_tag    = "glossary";
-      comp_obj_heading_.marked_up_level       = "1";
-      comp_obj_heading_.heading_lev_markup    = 4;
-      comp_obj_heading_.heading_lev_collapsed = 2;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      comp_obj_heading_.dom_markedup          = [ 1, 1, 0, 0, 1, 0, 0, 0];
-      comp_obj_heading_.dom_collapsed         = [ 1, 1, 1, 0, 0, 0, 0, 0];
-      comp_obj_heading_.anchor_tags           = ["glossary"];
-      the_glossary_section                    ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "backmatter";
+      comp_obj_heading_.typeinfo.of_section        = "glossary";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "Glossary";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.tags.segment_anchor_tag    = "_part_glossary";
+      comp_obj_heading_.node.marked_up_level       = "B";
+      comp_obj_heading_.node.heading_lev_markup    = 1;
+      comp_obj_heading_.node.heading_lev_collapsed = 1;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      comp_obj_heading_.node.dom_markedup          = [ 1, 1, 0, 0, 0, 0, 0, 0];
+      comp_obj_heading_.node.dom_collapsed         = [ 1, 1, 0, 0, 0, 0, 0, 0];
+      the_glossary_section                         ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "backmatter";
+      comp_obj_heading_.typeinfo.of_section        = "glossary";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "Glossary";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.tags.segment_anchor_tag    = "glossary";
+      comp_obj_heading_.node.marked_up_level       = "1";
+      comp_obj_heading_.node.heading_lev_markup    = 4;
+      comp_obj_heading_.node.heading_lev_collapsed = 2;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      comp_obj_heading_.node.dom_markedup          = [ 1, 1, 0, 0, 1, 0, 0, 0];
+      comp_obj_heading_.node.dom_collapsed         = [ 1, 1, 1, 0, 0, 0, 0, 0];
+      comp_obj_heading_.tags.anchor_tags           = ["glossary"];
+      the_glossary_section                         ~= comp_obj_heading_;
     } else {
       _para_match_(line, an_object, an_object_key, indent, bullet, obj_type_status, line_occur);
       comp_obj_para                           = comp_obj_para.init;
-      comp_obj_para.of_part                   = "backmatter";
-      comp_obj_para.of_section                = "glossary";
-      comp_obj_para.is_of                     = "para";
-      comp_obj_para.is_a                      = "glossary";
+      comp_obj_para.typeinfo.of_part          = "backmatter";
+      comp_obj_para.typeinfo.of_section       = "glossary";
+      comp_obj_para.typeinfo.is_of            = "para";
+      comp_obj_para.typeinfo.is_a             = "glossary";
       comp_obj_para.text                      = line.to!string.strip;
-      comp_obj_para.ocn                       = 0;
-      comp_obj_para.obj_cite_number           = "";
-      comp_obj_para.obj_cite_number_off       = "";
-      comp_obj_para.obj_cite_number_type      = 0;
-      comp_obj_para.indent_hang               = indent["hang_position"];
-      comp_obj_para.indent_base               = indent["base_position"];
-      comp_obj_para.bullet                    = bullet;
+      comp_obj_para.node.ocn                  = 0;
+      comp_obj_para.node.obj_cite_number      = "";
+      comp_obj_para.misc.obj_cite_number_off  = "";
+      comp_obj_para.misc.obj_cite_number_type = 0;
+      comp_obj_para.attrib.indent_hang        = indent["hang_position"];
+      comp_obj_para.attrib.indent_base        = indent["base_position"];
+      comp_obj_para.attrib.bullet             = bullet;
       the_glossary_section                    ~= comp_obj_para;
     }
     obj_type_status["ocn_status"] = OCNstatus.on;
@@ -803,80 +803,80 @@ if there is a blurb section you need to:
     line_occur["para"] = State.off;
     an_object_key="blurb_nugget";
     if (line.matchFirst(rgx.heading_blurb)) {
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "backmatter";
-      comp_obj_heading_.of_section            = "blurb";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "Blurb";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.segment_anchor_tag    = "_part_blurb";
-      comp_obj_heading_.marked_up_level       = "B";
-      comp_obj_heading_.heading_lev_markup    = 1;
-      comp_obj_heading_.heading_lev_collapsed = 1;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      comp_obj_heading_.dom_markedup          = [ 1, 1, 0, 0, 0, 0, 0, 0];
-      comp_obj_heading_.dom_collapsed         = [ 1, 1, 0, 0, 0, 0, 0, 0];
-      the_blurb_section                       ~= comp_obj_heading_;
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "backmatter";
-      comp_obj_heading_.of_section            = "blurb";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "Blurb";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.segment_anchor_tag    = "blurb";
-      comp_obj_heading_.marked_up_level       = "1";
-      comp_obj_heading_.heading_lev_markup    = 4;
-      comp_obj_heading_.heading_lev_collapsed = 2;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      comp_obj_heading_.anchor_tags           = ["blurb"];
-      comp_obj_heading_.dom_markedup          = [ 1, 1, 0, 0, 1, 0, 0, 0];
-      comp_obj_heading_.dom_collapsed         = [ 1, 1, 1, 0, 0, 0, 0, 0];
-      the_blurb_section                       ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "backmatter";
+      comp_obj_heading_.typeinfo.of_section        = "blurb";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "Blurb";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.tags.segment_anchor_tag    = "_part_blurb";
+      comp_obj_heading_.node.marked_up_level       = "B";
+      comp_obj_heading_.node.heading_lev_markup    = 1;
+      comp_obj_heading_.node.heading_lev_collapsed = 1;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      comp_obj_heading_.node.dom_markedup          = [ 1, 1, 0, 0, 0, 0, 0, 0];
+      comp_obj_heading_.node.dom_collapsed         = [ 1, 1, 0, 0, 0, 0, 0, 0];
+      the_blurb_section                            ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "backmatter";
+      comp_obj_heading_.typeinfo.of_section        = "blurb";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "Blurb";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.tags.segment_anchor_tag    = "blurb";
+      comp_obj_heading_.node.marked_up_level       = "1";
+      comp_obj_heading_.node.heading_lev_markup    = 4;
+      comp_obj_heading_.node.heading_lev_collapsed = 2;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      comp_obj_heading_.tags.anchor_tags           = ["blurb"];
+      comp_obj_heading_.node.dom_markedup          = [ 1, 1, 0, 0, 1, 0, 0, 0];
+      comp_obj_heading_.node.dom_collapsed         = [ 1, 1, 1, 0, 0, 0, 0, 0];
+      the_blurb_section                            ~= comp_obj_heading_;
     } else if (line.matchFirst(rgx.heading)
     && (opt_action.backmatter && opt_action.section_blurb)) {
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "backmatter";
-      comp_obj_heading_.of_section            = "blurb";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = line.to!string;
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.segment_anchor_tag    = "blurb";
-      comp_obj_heading_.marked_up_level       = an_object["lev"].to!string;
-      comp_obj_heading_.heading_lev_markup    = an_object["lev_markup_number"].to!int;    // make int, remove need to conv
-      comp_obj_heading_.heading_lev_collapsed = an_object["lev_collapsed_number"].to!int; // make int, remove need to conv
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      the_blurb_section                       ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "backmatter";
+      comp_obj_heading_.typeinfo.of_section        = "blurb";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = line.to!string;
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.tags.segment_anchor_tag    = "blurb";
+      comp_obj_heading_.node.marked_up_level       = an_object["lev"].to!string;
+      comp_obj_heading_.node.heading_lev_markup    = an_object["lev_markup_number"].to!int;    // make int, remove need to conv
+      comp_obj_heading_.node.heading_lev_collapsed = an_object["lev_collapsed_number"].to!int; // make int, remove need to conv
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      the_blurb_section                            ~= comp_obj_heading_;
     } else {
       _para_match_(line, an_object, an_object_key, indent, bullet, obj_type_status, line_occur);
       comp_obj_para                           = comp_obj_para.init;
-      comp_obj_para.of_part                   = "backmatter";
-      comp_obj_para.of_section                = "blurb";
-      comp_obj_para.is_of                     = "para";
-      comp_obj_para.is_a                      = "blurb";
+      comp_obj_para.typeinfo.of_part          = "backmatter";
+      comp_obj_para.typeinfo.of_section       = "blurb";
+      comp_obj_para.typeinfo.is_of            = "para";
+      comp_obj_para.typeinfo.is_a             = "blurb";
       comp_obj_para.text                      = munge.url_links(line.to!string.strip).replaceFirst(rgx.para_attribs, "");
-      comp_obj_para.ocn                       = 0;
-      comp_obj_para.obj_cite_number           = "";
-      comp_obj_para.obj_cite_number_off       = "";
-      comp_obj_para.obj_cite_number_type      = 0;
-      comp_obj_para.indent_hang               = indent["hang_position"];
-      comp_obj_para.indent_base               = indent["base_position"];
-      comp_obj_para.inline_links              = true;
-      comp_obj_para.bullet                    = bullet;
+      comp_obj_para.node.ocn                  = 0;
+      comp_obj_para.node.obj_cite_number      = "";
+      comp_obj_para.misc.obj_cite_number_off  = "";
+      comp_obj_para.misc.obj_cite_number_type = 0;
+      comp_obj_para.attrib.indent_hang        = indent["hang_position"];
+      comp_obj_para.attrib.indent_base        = indent["base_position"];
+      comp_obj_para.has.inline_links          = true;
+      comp_obj_para.attrib.bullet             = bullet;
       the_blurb_section                       ~= comp_obj_para;
     }
     obj_type_status["ocn_status"] = OCNstatus.on;
@@ -1037,14 +1037,14 @@ if (line.matchFirst(rgx.book_index)
     debug(comment) {
       writeln(line);
     }
-    an_object[an_object_key]           ~= line ~= "\n";
-    comp_obj_comment                   = comp_obj_comment.init;
-    comp_obj_comment.of_part           = "comment"; // breaks flow
-    comp_obj_comment.of_section        = "comment"; // breaks flow
-    comp_obj_comment.is_of             = "comment";
-    comp_obj_comment.is_a              = "comment";
-    comp_obj_comment.text              = an_object[an_object_key].strip;
-    the_document_body_section          ~= comp_obj_comment;
+    an_object[an_object_key]             ~= line ~= "\n";
+    comp_obj_comment                     = comp_obj_comment.init;
+    comp_obj_comment.typeinfo.of_part    = "comment"; // breaks flow
+    comp_obj_comment.typeinfo.of_section = "comment"; // breaks flow
+    comp_obj_comment.typeinfo.is_of      = "comment";
+    comp_obj_comment.typeinfo.is_a       = "comment";
+    comp_obj_comment.text                = an_object[an_object_key].strip;
+    the_document_body_section            ~= comp_obj_comment;
     _common_reset_(line_occur, an_object, obj_type_status);
     processing.remove("verse");
     ++cntr;
@@ -1281,26 +1281,26 @@ if ((obj_type_status["heading"] == State.on)
     = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta);
   an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
   anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
-  comp_obj_para                       = comp_obj_para.init;
-  comp_obj_para.of_part               = "body";
-  comp_obj_para.of_section            = "body";
-  comp_obj_para.is_of                 = "para";
-  comp_obj_para.is_a                  = "para";
-  comp_obj_para.text                  = an_object["substantive"].to!string.strip;
-  comp_obj_para.ocn                   = obj_cite_digits.digit;
-  comp_obj_para.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-  comp_obj_para.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-  comp_obj_para.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-  comp_obj_para.obj_cite_number_type  = obj_cite_digits.type;
-  comp_obj_para.indent_hang           = indent["hang_position"];
-  comp_obj_para.indent_base           = indent["base_position"];
-  comp_obj_para.bullet                = bullet;
-  comp_obj_para.anchor_tags           = anchor_tags;
-  comp_obj_para.inline_notes_reg      = substantive_obj_misc_tuple[sObj.notes_reg];
-  comp_obj_para.inline_notes_star     = substantive_obj_misc_tuple[sObj.notes_star];
-  comp_obj_para.inline_links          = substantive_obj_misc_tuple[sObj.links];
-  comp_obj_para.contains_image_without_dimensions  = substantive_obj_misc_tuple[sObj.image_no_dimensions];
-  the_document_body_section           ~= comp_obj_para;
+  comp_obj_para                                          = comp_obj_para.init;
+  comp_obj_para.typeinfo.of_part                         = "body";
+  comp_obj_para.typeinfo.of_section                      = "body";
+  comp_obj_para.typeinfo.is_of                           = "para";
+  comp_obj_para.typeinfo.is_a                            = "para";
+  comp_obj_para.text                                     = an_object["substantive"].to!string.strip;
+  comp_obj_para.node.ocn                                 = obj_cite_digits.digit;
+  comp_obj_para.node.obj_cite_number                     = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+  comp_obj_para.misc.obj_cite_number_off                 = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+  comp_obj_para.misc.obj_cite_number_bkidx               = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+  comp_obj_para.misc.obj_cite_number_type                = obj_cite_digits.type;
+  comp_obj_para.attrib.indent_hang                       = indent["hang_position"];
+  comp_obj_para.attrib.indent_base                       = indent["base_position"];
+  comp_obj_para.attrib.bullet                            = bullet;
+  comp_obj_para.tags.anchor_tags                         = anchor_tags;
+  comp_obj_para.has.inline_notes_reg                     = substantive_obj_misc_tuple[sObj.notes_reg];
+  comp_obj_para.has.inline_notes_star                    = substantive_obj_misc_tuple[sObj.notes_star];
+  comp_obj_para.has.inline_links                         = substantive_obj_misc_tuple[sObj.links];
+  comp_obj_para.has.contains_image_without_dimensions    = substantive_obj_misc_tuple[sObj.image_no_dimensions];
+  the_document_body_section                              ~= comp_obj_para;
   _common_reset_(line_occur, an_object, obj_type_status);
   indent=[
     "hang_position" : 0,
@@ -1320,23 +1320,23 @@ if ((obj_type_status["heading"] == State.on)
 #+BEGIN_SRC d
 /+ unless (the_document_body_section.length == 0) ? +/
 if (the_document_body_section.length > 0) {
-  if (((the_document_body_section[$-1].is_a == "para")
-    || (the_document_body_section[$-1].is_a == "heading")
-    || (the_document_body_section[$-1].is_a == "quote")
-    || (the_document_body_section[$-1].is_a == "group")
-    || (the_document_body_section[$-1].is_a == "block")
-    || (the_document_body_section[$-1].is_a == "verse"))
+  if (((the_document_body_section[$-1].typeinfo.is_a == "para")
+    || (the_document_body_section[$-1].typeinfo.is_a == "heading")
+    || (the_document_body_section[$-1].typeinfo.is_a == "quote")
+    || (the_document_body_section[$-1].typeinfo.is_a == "group")
+    || (the_document_body_section[$-1].typeinfo.is_a == "block")
+    || (the_document_body_section[$-1].typeinfo.is_a == "verse"))
   && (the_document_body_section.length > previous_length)) {
-    if ((the_document_body_section[$-1].is_a == "heading")
-    && (the_document_body_section[$-1].heading_lev_markup < 5)) {
+    if ((the_document_body_section[$-1].typeinfo.is_a == "heading")
+    && (the_document_body_section[$-1].node.heading_lev_markup < 5)) {
       obj_type_status["biblio_section"]   = State.off;
       obj_type_status["glossary_section"] = State.off;
       obj_type_status["blurb_section"]    = State.off;
     }
-    if (the_document_body_section[$-1].is_a == "verse") {
+    if (the_document_body_section[$-1].typeinfo.is_a == "verse") {
       /+ scan for endnotes for whole poem (each verse in poem) +/
       foreach (i; previous_length .. the_document_body_section.length) {
-        if (the_document_body_section[i].is_a == "verse") {
+        if (the_document_body_section[i].typeinfo.is_a == "verse") {
           if ((the_document_body_section[i].text).match(
             rgx.inline_notes_delimiter_al_regular_number_note
           )) {
@@ -1406,22 +1406,22 @@ debug(endnotes) {
 #+name: abs_post
 #+BEGIN_SRC d
 if (an_object["glossary_nugget"].length == 0) {
-  comp_obj_heading_                       = comp_obj_heading_.init;
-  comp_obj_heading_.of_part               = "empty";
-  comp_obj_heading_.of_section            = "empty";
-  comp_obj_heading_.is_of                 = "para";
-  comp_obj_heading_.is_a                  = "heading";
-  comp_obj_heading_.text                  = "(skip) there is no Glossary section";
-  comp_obj_heading_.ocn                   = 0;
-  comp_obj_heading_.obj_cite_number       = "";
-  comp_obj_heading_.obj_cite_number_off   = "";
-  comp_obj_heading_.obj_cite_number_type  = 0;
-  comp_obj_heading_.marked_up_level       = "B";
-  comp_obj_heading_.heading_lev_markup    = 1;
-  comp_obj_heading_.heading_lev_collapsed = 1;
-  comp_obj_heading_.parent_ocn            = 1;
-  comp_obj_heading_.parent_lev_markup     = 0;
-  the_glossary_section                    ~= comp_obj_heading_;
+  comp_obj_heading_                            = comp_obj_heading_.init;
+  comp_obj_heading_.typeinfo.of_part           = "empty";
+  comp_obj_heading_.typeinfo.of_section        = "empty";
+  comp_obj_heading_.typeinfo.is_of             = "para";
+  comp_obj_heading_.typeinfo.is_a              = "heading";
+  comp_obj_heading_.text                       = "(skip) there is no Glossary section";
+  comp_obj_heading_.node.ocn                   = 0;
+  comp_obj_heading_.node.obj_cite_number       = "";
+  comp_obj_heading_.misc.obj_cite_number_off   = "";
+  comp_obj_heading_.misc.obj_cite_number_type  = 0;
+  comp_obj_heading_.node.marked_up_level       = "B";
+  comp_obj_heading_.node.heading_lev_markup    = 1;
+  comp_obj_heading_.node.heading_lev_collapsed = 1;
+  comp_obj_heading_.node.parent_ocn            = 1;
+  comp_obj_heading_.node.parent_lev_markup     = 0;
+  the_glossary_section                         ~= comp_obj_heading_;
 } else {
   writeln("gloss");
 }
@@ -1445,58 +1445,58 @@ auto biblio_ordered
 #+name: abs_post
 #+BEGIN_SRC d
 if (biblio_ordered.length > 0) {
-  comp_obj_heading_                       = comp_obj_heading_.init;
-  comp_obj_heading_.of_part               = "backmatter";
-  comp_obj_heading_.of_section            = "bibliography";
-  comp_obj_heading_.is_of                 = "para";
-  comp_obj_heading_.is_a                  = "heading";
-  comp_obj_heading_.text                  = "Bibliography";
-  comp_obj_heading_.ocn                   = 0;
-  comp_obj_heading_.obj_cite_number       = "";
-  comp_obj_heading_.obj_cite_number_off   = "";
-  comp_obj_heading_.obj_cite_number_type  = 0;
-  comp_obj_heading_.segment_anchor_tag    = "_part_bibliography";
-  comp_obj_heading_.marked_up_level       = "B";
-  comp_obj_heading_.heading_lev_markup    = 1;
-  comp_obj_heading_.heading_lev_collapsed = 1;
-  comp_obj_heading_.parent_ocn            = 1;
-  comp_obj_heading_.parent_lev_markup     = 0;
-  the_bibliography_section                ~= comp_obj_heading_;
-  comp_obj_heading_                       = comp_obj_heading_.init;
-  comp_obj_heading_.of_part               = "backmatter";
-  comp_obj_heading_.of_section            = "bibliography";
-  comp_obj_heading_.is_of                 = "para";
-  comp_obj_heading_.is_a                  = "heading";
-  comp_obj_heading_.text                  = "Bibliography";
-  comp_obj_heading_.ocn                   = 0;
-  comp_obj_heading_.obj_cite_number       = "";
-  comp_obj_heading_.obj_cite_number_off   = "";
-  comp_obj_heading_.obj_cite_number_type  = 0;
-  comp_obj_heading_.segment_anchor_tag    = "bibliography";
-  comp_obj_heading_.marked_up_level       = "1";
-  comp_obj_heading_.heading_lev_markup    = 4;
-  comp_obj_heading_.heading_lev_collapsed = 2;
-  comp_obj_heading_.parent_ocn            = 1;
-  comp_obj_heading_.parent_lev_markup     = 0;
-  comp_obj_heading_.anchor_tags           = ["bibliography"];
-  the_bibliography_section                ~= comp_obj_heading_;
+  comp_obj_heading_                            = comp_obj_heading_.init;
+  comp_obj_heading_.typeinfo.of_part           = "backmatter";
+  comp_obj_heading_.typeinfo.of_section        = "bibliography";
+  comp_obj_heading_.typeinfo.is_of             = "para";
+  comp_obj_heading_.typeinfo.is_a              = "heading";
+  comp_obj_heading_.text                       = "Bibliography";
+  comp_obj_heading_.node.ocn                   = 0;
+  comp_obj_heading_.node.obj_cite_number       = "";
+  comp_obj_heading_.misc.obj_cite_number_off   = "";
+  comp_obj_heading_.misc.obj_cite_number_type  = 0;
+  comp_obj_heading_.tags.segment_anchor_tag    = "_part_bibliography";
+  comp_obj_heading_.node.marked_up_level       = "B";
+  comp_obj_heading_.node.heading_lev_markup    = 1;
+  comp_obj_heading_.node.heading_lev_collapsed = 1;
+  comp_obj_heading_.node.parent_ocn            = 1;
+  comp_obj_heading_.node.parent_lev_markup     = 0;
+  the_bibliography_section                     ~= comp_obj_heading_;
+  comp_obj_heading_                            = comp_obj_heading_.init;
+  comp_obj_heading_.typeinfo.of_part           = "backmatter";
+  comp_obj_heading_.typeinfo.of_section        = "bibliography";
+  comp_obj_heading_.typeinfo.is_of             = "para";
+  comp_obj_heading_.typeinfo.is_a              = "heading";
+  comp_obj_heading_.text                       = "Bibliography";
+  comp_obj_heading_.node.ocn                   = 0;
+  comp_obj_heading_.node.obj_cite_number       = "";
+  comp_obj_heading_.misc.obj_cite_number_off   = "";
+  comp_obj_heading_.misc.obj_cite_number_type  = 0;
+  comp_obj_heading_.tags.segment_anchor_tag    = "bibliography";
+  comp_obj_heading_.node.marked_up_level       = "1";
+  comp_obj_heading_.node.heading_lev_markup    = 4;
+  comp_obj_heading_.node.heading_lev_collapsed = 2;
+  comp_obj_heading_.node.parent_ocn            = 1;
+  comp_obj_heading_.node.parent_lev_markup     = 0;
+  comp_obj_heading_.tags.anchor_tags           = ["bibliography"];
+  the_bibliography_section                     ~= comp_obj_heading_;
 } else {
-  comp_obj_heading_                       = comp_obj_heading_.init;
-  comp_obj_heading_.of_part               = "empty";
-  comp_obj_heading_.of_section            = "empty";
-  comp_obj_heading_.is_of                 = "para";
-  comp_obj_heading_.is_a                  = "heading";
-  comp_obj_heading_.text                  = "(skip) there is no Bibliography";
-  comp_obj_heading_.ocn                   = 0;
-  comp_obj_heading_.obj_cite_number       = "";
-  comp_obj_heading_.obj_cite_number_off   = "";
-  comp_obj_heading_.obj_cite_number_type  = 0;
-  comp_obj_heading_.marked_up_level       = "B";
-  comp_obj_heading_.heading_lev_markup    = 1;
-  comp_obj_heading_.heading_lev_collapsed = 1;
-  comp_obj_heading_.parent_ocn            = 1;
-  comp_obj_heading_.parent_lev_markup     = 0;
-  the_bibliography_section                ~= comp_obj_heading_;
+  comp_obj_heading_                            = comp_obj_heading_.init;
+  comp_obj_heading_.typeinfo.of_part           = "empty";
+  comp_obj_heading_.typeinfo.of_section        = "empty";
+  comp_obj_heading_.typeinfo.is_of             = "para";
+  comp_obj_heading_.typeinfo.is_a              = "heading";
+  comp_obj_heading_.text                       = "(skip) there is no Bibliography";
+  comp_obj_heading_.node.ocn                   = 0;
+  comp_obj_heading_.node.obj_cite_number       = "";
+  comp_obj_heading_.misc.obj_cite_number_off   = "";
+  comp_obj_heading_.misc.obj_cite_number_type  = 0;
+  comp_obj_heading_.node.marked_up_level       = "B";
+  comp_obj_heading_.node.heading_lev_markup    = 1;
+  comp_obj_heading_.node.heading_lev_collapsed = 1;
+  comp_obj_heading_.node.parent_ocn            = 1;
+  comp_obj_heading_.node.parent_lev_markup     = 0;
+  the_bibliography_section                     ~= comp_obj_heading_;
 }
 #+END_SRC
 
@@ -1520,21 +1520,21 @@ foreach (entry; biblio_ordered) {
     ((entry["place"].str.empty) ? "" : ", " ~ entry["place"].str),
     ((entry["url"].str.empty) ? "" : ", [" ~ entry["url"].str ~ "]"),
   );
-  comp_obj_para                       = comp_obj_para.init;
-  comp_obj_para.of_part               = "backmatter";
-  comp_obj_para.of_section            = "bibliography";
-  comp_obj_para.is_of                 = "para";
-  comp_obj_para.is_a                  = "bibliography";
-  comp_obj_para.text                  = out_.to!string.strip;
-  comp_obj_para.ocn                   = 0;
-  comp_obj_para.obj_cite_number       = "";
-  comp_obj_para.obj_cite_number_off   = "";
-  comp_obj_para.obj_cite_number_type  = 0;
-  comp_obj_para.indent_hang           = 0;
-  comp_obj_para.indent_base           = 1;
-  comp_obj_para.bullet                = bullet;
-  comp_obj_para.anchor_tags           = anchor_tags;
-  the_bibliography_section            ~= comp_obj_para;
+  comp_obj_para                           = comp_obj_para.init;
+  comp_obj_para.typeinfo.of_part          = "backmatter";
+  comp_obj_para.typeinfo.of_section       = "bibliography";
+  comp_obj_para.typeinfo.is_of            = "para";
+  comp_obj_para.typeinfo.is_a             = "bibliography";
+  comp_obj_para.text                      = out_.to!string.strip;
+  comp_obj_para.node.ocn                  = 0;
+  comp_obj_para.node.obj_cite_number      = "";
+  comp_obj_para.misc.obj_cite_number_off  = "";
+  comp_obj_para.misc.obj_cite_number_type = 0;
+  comp_obj_para.attrib.indent_hang        = 0;
+  comp_obj_para.attrib.indent_base        = 1;
+  comp_obj_para.attrib.bullet             = bullet;
+  comp_obj_para.tags.anchor_tags          = anchor_tags;
+  the_bibliography_section                ~= comp_obj_para;
 }
 #+END_SRC
 
@@ -1606,23 +1606,23 @@ debug(bookindex) {
 #+name: abs_post
 #+BEGIN_SRC d
 if (an_object["blurb_nugget"].length == 0) {
-  comp_obj_heading_                       = comp_obj_heading_.init;
-  comp_obj_heading_.of_part               = "empty";
-  comp_obj_heading_.of_section            = "empty";
-  comp_obj_heading_.is_of                 = "para";
-  comp_obj_heading_.is_a                  = "heading";
-  comp_obj_heading_.text                  = "(skip) there is no Blurb section";
-  comp_obj_heading_.ocn                   = 0;
-  comp_obj_para.obj_cite_number           = "";
-  comp_obj_para.obj_cite_number_off       = "";
-  comp_obj_para.obj_cite_number_type      = 0;
-  comp_obj_heading_.segment_anchor_tag    = "";
-  comp_obj_heading_.marked_up_level       = "B";
-  comp_obj_heading_.heading_lev_markup    = 1;
-  comp_obj_heading_.heading_lev_collapsed = 1;
-  comp_obj_heading_.parent_ocn            = 1;
-  comp_obj_heading_.parent_lev_markup     = 0;
-  the_blurb_section                       ~= comp_obj_heading_;
+  comp_obj_heading_                            = comp_obj_heading_.init;
+  comp_obj_heading_.typeinfo.of_part           = "empty";
+  comp_obj_heading_.typeinfo.of_section        = "empty";
+  comp_obj_heading_.typeinfo.is_of             = "para";
+  comp_obj_heading_.typeinfo.is_a              = "heading";
+  comp_obj_heading_.text                       = "(skip) there is no Blurb section";
+  comp_obj_heading_.node.ocn                   = 0;
+  comp_obj_para.node.obj_cite_number           = "";
+  comp_obj_para.misc.obj_cite_number_off       = "";
+  comp_obj_para.misc.obj_cite_number_type      = 0;
+  comp_obj_heading_.tags.segment_anchor_tag    = "";
+  comp_obj_heading_.node.marked_up_level       = "B";
+  comp_obj_heading_.node.heading_lev_markup    = 1;
+  comp_obj_heading_.node.heading_lev_collapsed = 1;
+  comp_obj_heading_.node.parent_ocn            = 1;
+  comp_obj_heading_.node.parent_lev_markup     = 0;
+  the_blurb_section                            ~= comp_obj_heading_;
 }
 debug(blurb) {
   foreach (blurb; the_blurb_section) {
@@ -1639,18 +1639,18 @@ indent=[
   "hang_position" : 1,
   "base_position" : 1,
 ];
-comp_obj_toc                       = comp_obj_toc.init;
-comp_obj_toc.of_part               = "frontmatter";
-comp_obj_toc.of_section            = "toc";
-comp_obj_toc.is_of                 = "para";
-comp_obj_toc.is_a                  = "toc";
-comp_obj_toc.ocn                   = 0;
-comp_obj_toc.obj_cite_number       = "";
-comp_obj_toc.obj_cite_number_off   = "";
-comp_obj_toc.obj_cite_number_type  = 0;
-comp_obj_toc.indent_hang           = indent["hang_position"];
-comp_obj_toc.indent_base           = indent["base_position"];
-comp_obj_toc.bullet                = false;
+comp_obj_toc                           = comp_obj_toc.init;
+comp_obj_toc.typeinfo.of_part          = "frontmatter";
+comp_obj_toc.typeinfo.of_section       = "toc";
+comp_obj_toc.typeinfo.is_of            = "para";
+comp_obj_toc.typeinfo.is_a             = "toc";
+comp_obj_toc.node.ocn                  = 0;
+comp_obj_toc.node.obj_cite_number      = "";
+comp_obj_toc.misc.obj_cite_number_off  = "";
+comp_obj_toc.misc.obj_cite_number_type = 0;
+comp_obj_toc.attrib.indent_hang        = indent["hang_position"];
+comp_obj_toc.attrib.indent_base        = indent["base_position"];
+comp_obj_toc.attrib.bullet             = false;
 if (the_endnotes_section.length > 1) {
   toc_txt_ = format(
     "{ %s }%s%s%s",
@@ -1661,7 +1661,7 @@ if (the_endnotes_section.length > 1) {
   );
   toc_txt_= munge.url_links(toc_txt_);
   comp_obj_toc.text                       = toc_txt_.to!string.strip;
-  comp_obj_toc.inline_links               = true;
+  comp_obj_toc.has.inline_links           = true;
   the_table_of_contents_section["seg"]    ~= comp_obj_toc;
 }
 if (the_glossary_section.length > 1) {
@@ -1674,7 +1674,7 @@ if (the_glossary_section.length > 1) {
   );
   toc_txt_= munge.url_links(toc_txt_);
   comp_obj_toc.text                       = toc_txt_.to!string.strip;
-  comp_obj_toc.inline_links               = true;
+  comp_obj_toc.has.inline_links           = true;
   the_table_of_contents_section["seg"]    ~= comp_obj_toc;
   toc_txt_ = format(
     "{ %s }#%s",
@@ -1683,7 +1683,7 @@ if (the_glossary_section.length > 1) {
   );
   toc_txt_= munge.url_links(toc_txt_);
   comp_obj_toc.text                       = toc_txt_.to!string.strip;
-  comp_obj_toc.inline_links               = true;
+  comp_obj_toc.has.inline_links           = true;
   the_table_of_contents_section["scroll"] ~= comp_obj_toc;
 }
 if (the_bibliography_section.length > 1){
@@ -1696,7 +1696,7 @@ if (the_bibliography_section.length > 1){
   );
   toc_txt_= munge.url_links(toc_txt_);
   comp_obj_toc.text                       = toc_txt_.to!string.strip;
-  comp_obj_toc.inline_links               = true;
+  comp_obj_toc.has.inline_links           = true;
   the_table_of_contents_section["seg"]    ~= comp_obj_toc;
 
   toc_txt_ = format(
@@ -1706,7 +1706,7 @@ if (the_bibliography_section.length > 1){
   );
   toc_txt_= munge.url_links(toc_txt_);
   comp_obj_toc.text                       = toc_txt_.to!string.strip;
-  comp_obj_toc.inline_links               = true;
+  comp_obj_toc.has.inline_links           = true;
   the_table_of_contents_section["scroll"] ~= comp_obj_toc;
 }
 if (the_bookindex_section["seg"].length > 1) {
@@ -1719,7 +1719,7 @@ if (the_bookindex_section["seg"].length > 1) {
   );
   toc_txt_= munge.url_links(toc_txt_);
   comp_obj_toc.text                       = toc_txt_.to!string.strip;
-  comp_obj_toc.inline_links               = true;
+  comp_obj_toc.has.inline_links           = true;
   the_table_of_contents_section["seg"]    ~= comp_obj_toc;
 }
 if (the_bookindex_section["scroll"].length > 1) {
@@ -1730,7 +1730,7 @@ if (the_bookindex_section["scroll"].length > 1) {
   );
   toc_txt_= munge.url_links(toc_txt_);
   comp_obj_toc.text                       = toc_txt_.to!string.strip;
-  comp_obj_toc.inline_links               = true;
+  comp_obj_toc.has.inline_links           = true;
   the_table_of_contents_section["scroll"] ~= comp_obj_toc;
 }
 if (the_blurb_section.length > 1) {
@@ -1743,7 +1743,7 @@ if (the_blurb_section.length > 1) {
   );
   toc_txt_= munge.url_links(toc_txt_);
   comp_obj_toc.text                       = toc_txt_.to!string.strip;
-  comp_obj_toc.inline_links               = true;
+  comp_obj_toc.has.inline_links           = true;
   the_table_of_contents_section["seg"]    ~= comp_obj_toc;
   toc_txt_ = format(
     "{ %s }#%s",
@@ -1751,7 +1751,7 @@ if (the_blurb_section.length > 1) {
     "blurb",                  // _anchor_tag
   );
   toc_txt_= munge.url_links(toc_txt_);
-  comp_obj_toc.inline_links               = true;
+  comp_obj_toc.has.inline_links           = true;
   comp_obj_toc.text                       = toc_txt_.to!string.strip;
   the_table_of_contents_section["scroll"] ~= comp_obj_toc;
 }
@@ -1762,7 +1762,7 @@ debug(toc) {
     the_table_of_contents_section["seg"].length
   );
   foreach (toc_linked_heading; the_table_of_contents_section["seg"]) {
-    writeln(mkup.indent_by_spaces_provided(toc_linked_heading.indent_hang), toc_linked_heading.text);
+    writeln(mkup.indent_by_spaces_provided(toc_linked_heading.attrib.indent_hang), toc_linked_heading.text);
   }
 }
 debug(tocscroll) {
@@ -1772,7 +1772,7 @@ debug(tocscroll) {
     the_table_of_contents_section["seg"].length
   );
   foreach (toc_linked_heading; the_table_of_contents_section["scroll"]) {
-    writeln(mkup.indent_by_spaces_provided(toc_linked_heading.indent_hang), toc_linked_heading.text);
+    writeln(mkup.indent_by_spaces_provided(toc_linked_heading.attrib.indent_hang), toc_linked_heading.text);
   }
 }
 #+END_SRC
@@ -1808,8 +1808,8 @@ if (the_endnotes_section.length > 1) {
   html_segnames ~= "endnotes";
   html_segnames_ptr = html_segnames_ptr_cntr;
   foreach (ref section; the_endnotes_section) {
-    if (section.heading_lev_markup == 4) {
-      section.ptr_html_segnames = html_segnames_ptr;
+    if (section.node.heading_lev_markup == 4) {
+      section.ptr.html_segnames = html_segnames_ptr;
       break;
     }
   }
@@ -1825,8 +1825,8 @@ if (the_glossary_section.length > 1) {
   html_segnames ~= "glossary";
   html_segnames_ptr = html_segnames_ptr_cntr;
   foreach (ref section; the_glossary_section) {
-    if (section.heading_lev_markup == 4) {
-      section.ptr_html_segnames = html_segnames_ptr;
+    if (section.node.heading_lev_markup == 4) {
+      section.ptr.html_segnames = html_segnames_ptr;
       break;
     }
   }
@@ -1842,8 +1842,8 @@ if (the_bibliography_section.length > 1) {
   html_segnames ~= "bibliography";
   html_segnames_ptr = html_segnames_ptr_cntr;
   foreach (ref section; the_bibliography_section) {
-    if (section.heading_lev_markup == 4) {
-      section.ptr_html_segnames = html_segnames_ptr;
+    if (section.node.heading_lev_markup == 4) {
+      section.ptr.html_segnames = html_segnames_ptr;
       break;
     }
   }
@@ -1859,14 +1859,14 @@ if (the_bookindex_section["scroll"].length > 1) {
   html_segnames ~= "bookindex";
   html_segnames_ptr = html_segnames_ptr_cntr;
   foreach (ref section; the_bookindex_section["scroll"]) {
-    if (section.heading_lev_markup == 4) {
-      section.ptr_html_segnames = html_segnames_ptr;
+    if (section.node.heading_lev_markup == 4) {
+      section.ptr.html_segnames = html_segnames_ptr;
       break;
     }
   }
   foreach (ref section; the_bookindex_section["seg"]) {
-    if (section.heading_lev_markup == 4) {
-      section.ptr_html_segnames = html_segnames_ptr;
+    if (section.node.heading_lev_markup == 4) {
+      section.ptr.html_segnames = html_segnames_ptr;
       break;
     }
   }
@@ -1882,8 +1882,8 @@ if (the_blurb_section.length > 1) {
   html_segnames ~= "blurb";
   html_segnames_ptr = html_segnames_ptr_cntr;
   foreach (ref section; the_blurb_section) {
-    if (section.heading_lev_markup == 4) {
-      section.ptr_html_segnames = html_segnames_ptr;
+    if (section.node.heading_lev_markup == 4) {
+      section.ptr.html_segnames = html_segnames_ptr;
       break;
     }
   }
@@ -1949,7 +1949,7 @@ string[] segnames_0_4;
 #+name: abs_post
 #+BEGIN_SRC d
 auto _image_dimensions(M,O)(M manifest_matter, O obj) {
-  if (obj.contains_image_without_dimensions) {
+  if (obj.has.contains_image_without_dimensions) {
     import std.math;
     import imageformats;
     int w, h, chans;
@@ -1989,21 +1989,21 @@ auto _image_dimensions(M,O)(M manifest_matter, O obj) {
 #+name: abs_post
 #+BEGIN_SRC d
 foreach (ref obj; the_document_head_section) {
-  if (obj.is_a == "heading") {
+  if (obj.typeinfo.is_a == "heading") {
     debug(dom) {
       writeln(obj.text);
     }
-    if (obj.heading_lev_markup <= 4) {
-      segnames_0_4 ~= obj.segment_anchor_tag;
+    if (obj.node.heading_lev_markup <= 4) {
+      segnames_0_4 ~= obj.tags.segment_anchor_tag;
     }
-    if (obj.heading_lev_markup == 0) {
+    if (obj.node.heading_lev_markup == 0) {
       /+ TODO second hit (of two) with same assertion failure, check, fix and reinstate
-      assert( obj.ocn == 1,
-        "Title OCN should be 1 not: " ~ obj.ocn.to!string); // bug introduced 0.18.1
+      assert( obj.node.ocn == 1,
+        "Title OCN should be 1 not: " ~ obj.node.ocn.to!string); // bug introduced 0.18.1
       +/
-      obj.ocn = 1;
-      obj.obj_cite_number = "1";
-      obj.obj_cite_number_type = OCNtype.ocn;
+      obj.node.ocn = 1;
+      obj.node.obj_cite_number = "1";
+      obj.misc.obj_cite_number_type = OCNtype.ocn;
     }
     /+ dom structure (marked up & collapsed) +/
     if ((opt_action.html)
@@ -2013,8 +2013,8 @@ foreach (ref obj; the_document_head_section) {
     || (opt_action.sqlite_discrete)
     || (opt_action.sqlite_update)
     || (opt_action.postgresql)) {
-      obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-      obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+      obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+      obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
     }
     obj = obj_heading_ancestors(obj, lv_ancestors_txt);
   }
@@ -2030,13 +2030,13 @@ if (the_table_of_contents_section["scroll"].length > 1) {
   dom_markedup_buffer = dom_markedup.dup;
   dom_collapsed_buffer = dom_collapsed.dup;
   foreach (ref obj; the_table_of_contents_section["scroll"]) {
-    if (obj.is_a == "heading") {
-      if (obj.heading_lev_markup <= 4) {
-        segnames_0_4 ~= obj.segment_anchor_tag;
-        if (obj.heading_lev_markup == 4) {
-          obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
-          assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-          obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+    if (obj.typeinfo.is_a == "heading") {
+      if (obj.node.heading_lev_markup <= 4) {
+        segnames_0_4 ~= obj.tags.segment_anchor_tag;
+        if (obj.node.heading_lev_markup == 4) {
+          obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
+          assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+          obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
         }
       }
       /+ dom structure (marked up & collapsed) +/
@@ -2047,8 +2047,8 @@ if (the_table_of_contents_section["scroll"].length > 1) {
       || (opt_action.sqlite_discrete)
       || (opt_action.sqlite_update)
       || (opt_action.postgresql)) {
-        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
       }
       obj = obj_heading_ancestors(obj, lv_ancestors_txt);
     }
@@ -2057,24 +2057,24 @@ if (the_table_of_contents_section["scroll"].length > 1) {
   dom_markedup = dom_markedup_buffer.dup;
   dom_collapsed = dom_collapsed_buffer.dup;
   foreach (ref obj; the_table_of_contents_section["seg"]) {
-    if (obj.is_a == "heading") {
+    if (obj.typeinfo.is_a == "heading") {
       debug(dom) {
         writeln(obj.text);
       }
-      if (obj.heading_lev_markup <= 4) {
-        segnames_0_4 ~= obj.segment_anchor_tag;
-        if (obj.heading_lev_markup == 4) {
-          obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
-          assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-          obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+      if (obj.node.heading_lev_markup <= 4) {
+        segnames_0_4 ~= obj.tags.segment_anchor_tag;
+        if (obj.node.heading_lev_markup == 4) {
+          obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
+          assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+          obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
         }
       }
       if ((opt_action.html)
       || (opt_action.html_scroll)
       || (opt_action.html_seg)
       || (opt_action.epub)) {
-        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
       }
       obj = obj_heading_ancestors(obj, lv_ancestors_txt);
     }
@@ -2089,20 +2089,20 @@ if (the_table_of_contents_section["scroll"].length > 1) {
 /+ multiple 1~ levels, loop through document body +/
 if (the_document_body_section.length > 1) {
   foreach (ref obj; the_document_body_section) {
-    if (obj.is_a == "heading") {
+    if (obj.typeinfo.is_a == "heading") {
       debug(dom) {
         writeln(obj.text);
       }
-      if (obj.heading_lev_markup <= 4) {
-        segnames_0_4 ~= obj.segment_anchor_tag;
-        if (obj.heading_lev_markup == 4) {
-          obj.lev4_subtoc = lev4_subtoc[obj.segment_anchor_tag];
-          obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-          if (html_segnames.length > obj.ptr_html_segnames + 1) {
-            obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+      if (obj.node.heading_lev_markup <= 4) {
+        segnames_0_4 ~= obj.tags.segment_anchor_tag;
+        if (obj.node.heading_lev_markup == 4) {
+          obj.tags.lev4_subtoc = lev4_subtoc[obj.tags.segment_anchor_tag];
+          obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+          if (html_segnames.length > obj.ptr.html_segnames + 1) {
+            obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
           }
-          assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-          obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+          assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+          obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
         }
       }
       /+ dom structure (marked up & collapsed) +/
@@ -2113,11 +2113,11 @@ if (the_document_body_section.length > 1) {
       || (opt_action.sqlite_discrete)
       || (opt_action.sqlite_update)
       || (opt_action.postgresql)) {
-        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
       }
       obj = obj_heading_ancestors(obj, lv_ancestors_txt);
-    } else if (obj.is_a == "para") {
+    } else if (obj.typeinfo.is_a == "para") {
        _images ~= extract_images(obj.text);
        obj = _image_dimensions(manifest_matter, obj);
     }
@@ -2139,22 +2139,22 @@ if (the_endnotes_section.length > 1) {
   dom_markedup = dom_markedup_buffer.dup;
   dom_collapsed = dom_collapsed_buffer.dup;
   foreach (ref obj; the_endnotes_section) {
-    if (obj.is_a == "heading") {
+    if (obj.typeinfo.is_a == "heading") {
       debug(dom) {
         writeln(obj.text);
       }
       obj_cite_digits = ocn_emit(OCNstatus.on);
-      obj.ocn = obj_cite_digits.digit;
-      obj.obj_cite_number = obj_cite_digits.on.to!string;
-      if (obj.heading_lev_markup <= 4) {
-        segnames_0_4 ~= obj.segment_anchor_tag;
-        if (obj.heading_lev_markup == 4) {
-          obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-          if (html_segnames.length > obj.ptr_html_segnames + 1) {
-            obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+      obj.node.ocn = obj_cite_digits.digit;
+      obj.node.obj_cite_number = obj_cite_digits.on.to!string;
+      if (obj.node.heading_lev_markup <= 4) {
+        segnames_0_4 ~= obj.tags.segment_anchor_tag;
+        if (obj.node.heading_lev_markup == 4) {
+          obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+          if (html_segnames.length > obj.ptr.html_segnames + 1) {
+            obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
           }
-          assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-          obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+          assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+          obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
         }
       }
       /+ dom structure (marked up & collapsed) +/
@@ -2165,8 +2165,8 @@ if (the_endnotes_section.length > 1) {
       || (opt_action.sqlite_discrete)
       || (opt_action.sqlite_update)
       || (opt_action.postgresql)) {
-        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
       }
       obj = obj_heading_ancestors(obj, lv_ancestors_txt);
     }
@@ -2183,22 +2183,22 @@ if (the_endnotes_section.length > 1) {
 /+ optional only one 1~ level +/
 if (the_glossary_section.length > 1) {
   foreach (ref obj; the_glossary_section) {
-    if (obj.is_a == "heading") {
+    if (obj.typeinfo.is_a == "heading") {
       debug(dom) {
         writeln(obj.text);
       }
       obj_cite_digits = ocn_emit(OCNstatus.on);
-      obj.ocn = obj_cite_digits.digit;
-      obj.obj_cite_number = obj_cite_digits.on.to!string;
-      if (obj.heading_lev_markup <= 4) {
-        segnames_0_4 ~= obj.segment_anchor_tag;
-        if (obj.heading_lev_markup == 4) {
-          obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-          if (html_segnames.length > obj.ptr_html_segnames + 1) {
-            obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+      obj.node.ocn = obj_cite_digits.digit;
+      obj.node.obj_cite_number = obj_cite_digits.on.to!string;
+      if (obj.node.heading_lev_markup <= 4) {
+        segnames_0_4 ~= obj.tags.segment_anchor_tag;
+        if (obj.node.heading_lev_markup == 4) {
+          obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+          if (html_segnames.length > obj.ptr.html_segnames + 1) {
+            obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
           }
-          assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-          obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+          assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+          obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
         }
       }
       /+ dom structure (marked up & collapsed) +/
@@ -2209,14 +2209,14 @@ if (the_glossary_section.length > 1) {
       || (opt_action.sqlite_discrete)
       || (opt_action.sqlite_update)
       || (opt_action.postgresql)) {
-        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
       }
       obj = obj_heading_ancestors(obj, lv_ancestors_txt);
-    } else if (obj.is_a == "glossary") {
+    } else if (obj.typeinfo.is_a == "glossary") {
       obj_cite_digits = ocn_emit(OCNstatus.on);
-      obj.ocn = obj_cite_digits.digit;
-      obj.obj_cite_number = obj_cite_digits.on.to!string;
+      obj.node.ocn = obj_cite_digits.digit;
+      obj.node.obj_cite_number = obj_cite_digits.on.to!string;
     }
   }
 }
@@ -2231,22 +2231,22 @@ if (the_glossary_section.length > 1) {
 /+ optional only one 1~ level +/
 if (the_bibliography_section.length > 1) {
   foreach (ref obj; the_bibliography_section) {
-    if (obj.is_a == "heading") {
+    if (obj.typeinfo.is_a == "heading") {
       debug(dom) {
         writeln(obj.text);
       }
       obj_cite_digits = ocn_emit(OCNstatus.on);
-      obj.ocn = obj_cite_digits.digit;
-      obj.obj_cite_number = obj_cite_digits.on.to!string; // check
-      if (obj.heading_lev_markup <= 4) {
-        segnames_0_4 ~= obj.segment_anchor_tag;
-        if (obj.heading_lev_markup == 4) {
-          obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-          if (html_segnames.length > obj.ptr_html_segnames + 1) {
-            obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+      obj.node.ocn = obj_cite_digits.digit;
+      obj.node.obj_cite_number = obj_cite_digits.on.to!string; // check
+      if (obj.node.heading_lev_markup <= 4) {
+        segnames_0_4 ~= obj.tags.segment_anchor_tag;
+        if (obj.node.heading_lev_markup == 4) {
+          obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+          if (html_segnames.length > obj.ptr.html_segnames + 1) {
+            obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
           }
-          assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-          obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+          assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+          obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
         }
       }
       /+ dom structure (marked up & collapsed) +/
@@ -2257,14 +2257,14 @@ if (the_bibliography_section.length > 1) {
       || (opt_action.sqlite_discrete)
       || (opt_action.sqlite_update)
       || (opt_action.postgresql)) {
-        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
       }
       obj = obj_heading_ancestors(obj, lv_ancestors_txt);
-    } else if (obj.is_a == "bibliography") {
+    } else if (obj.typeinfo.is_a == "bibliography") {
       obj_cite_digits = ocn_emit(OCNstatus.on);
-      obj.ocn = obj_cite_digits.on;
-      obj.obj_cite_number = obj_cite_digits.on.to!string;
+      obj.node.ocn = obj_cite_digits.on;
+      obj.node.obj_cite_number = obj_cite_digits.on.to!string;
     }
   }
 }
@@ -2285,21 +2285,21 @@ if (the_bookindex_section["scroll"].length > 1) {
   dom_markedup_buffer = dom_markedup.dup;
   dom_collapsed_buffer = dom_collapsed.dup;
   foreach (ref obj; the_bookindex_section["scroll"]) {
-    if (obj.is_a == "heading") {
+    if (obj.typeinfo.is_a == "heading") {
       debug(dom) {
       }
       obj_cite_digits = ocn_emit(OCNstatus.on);
-      obj.ocn = obj_cite_digits.on;
-      obj.obj_cite_number = obj_cite_digits.on.to!string;
-      if (obj.heading_lev_markup <= 4) {
-        segnames_0_4 ~= obj.segment_anchor_tag;
-        if (obj.heading_lev_markup == 4) {
-          obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-          if (html_segnames.length > obj.ptr_html_segnames + 1) {
-            obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+      obj.node.ocn = obj_cite_digits.on;
+      obj.node.obj_cite_number = obj_cite_digits.on.to!string;
+      if (obj.node.heading_lev_markup <= 4) {
+        segnames_0_4 ~= obj.tags.segment_anchor_tag;
+        if (obj.node.heading_lev_markup == 4) {
+          obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+          if (html_segnames.length > obj.ptr.html_segnames + 1) {
+            obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
           }
-          assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-          obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+          assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+          obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
         }
       }
       /+ dom structure (marked up & collapsed) +/
@@ -2310,36 +2310,36 @@ if (the_bookindex_section["scroll"].length > 1) {
       || (opt_action.sqlite_discrete)
       || (opt_action.sqlite_update)
       || (opt_action.postgresql)) {
-        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
       }
       obj = obj_heading_ancestors(obj, lv_ancestors_txt);
-    } else if (obj.is_a == "bookindex") {
+    } else if (obj.typeinfo.is_a == "bookindex") {
       obj_cite_digits = ocn_emit(OCNstatus.bkidx);
-      obj.ocn = obj_cite_digits.digit;
-      obj.obj_cite_number_bkidx = obj_cite_digits.bkidx.to!string;
-      obj.obj_cite_number_type = OCNtype.bkidx;
+      obj.node.ocn = obj_cite_digits.digit;
+      obj.misc.obj_cite_number_bkidx = obj_cite_digits.bkidx.to!string;
+      obj.misc.obj_cite_number_type = OCNtype.bkidx;
     }
   }
   /+ seg +/
   dom_markedup = dom_markedup_buffer.dup;
   dom_collapsed = dom_collapsed_buffer.dup;
   foreach (ref obj; the_bookindex_section["seg"]) {
-    if (obj.is_a == "heading") {
+    if (obj.typeinfo.is_a == "heading") {
       debug(dom) {
         writeln(obj.text);
       }
-      obj.ocn = ++ocn_;
-      obj.obj_cite_number = obj.ocn.to!string;
-      if (obj.heading_lev_markup <= 4) {
-        segnames_0_4 ~= obj.segment_anchor_tag;
-        if (obj.heading_lev_markup == 4) {
-          obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-          if (html_segnames.length > obj.ptr_html_segnames + 1) {
-            obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+      obj.node.ocn = ++ocn_;
+      obj.node.obj_cite_number = obj.node.ocn.to!string;
+      if (obj.node.heading_lev_markup <= 4) {
+        segnames_0_4 ~= obj.tags.segment_anchor_tag;
+        if (obj.node.heading_lev_markup == 4) {
+          obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+          if (html_segnames.length > obj.ptr.html_segnames + 1) {
+            obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
           }
-          assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-          obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+          assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+          obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
         }
       }
       /+ dom structure (marked up & collapsed) +/
@@ -2350,14 +2350,14 @@ if (the_bookindex_section["scroll"].length > 1) {
       || (opt_action.sqlite_discrete)
       || (opt_action.sqlite_update)
       || (opt_action.postgresql)) {
-        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
       }
       obj = obj_heading_ancestors(obj, lv_ancestors_txt);
-    } else if (obj.is_a == "bookindex") {
+    } else if (obj.typeinfo.is_a == "bookindex") {
       ocn_bidx_ = ++ocn_bkidx_;
-      obj.obj_cite_number_bkidx = ocn_bidx_.to!string; // FIX need to distinguish from regular ocn
-      obj.obj_cite_number_type = OCNtype.bkidx;
+      obj.misc.obj_cite_number_bkidx = ocn_bidx_.to!string; // FIX need to distinguish from regular ocn
+      obj.misc.obj_cite_number_type = OCNtype.bkidx;
     }
   }
   /+ TODO assert failure, reinstate
@@ -2374,22 +2374,22 @@ if (the_bookindex_section["scroll"].length > 1) {
 /+ optional only one 1~ level +/
 if (the_blurb_section.length > 1) {
   foreach (ref obj; the_blurb_section) {
-    if (obj.is_a == "heading") {
+    if (obj.typeinfo.is_a == "heading") {
       debug(dom) {
         writeln(obj.text);
       }
       obj_cite_digits = ocn_emit(OCNstatus.on);
-      obj.ocn = obj_cite_digits.on;
-      obj.obj_cite_number = obj_cite_digits.on.to!string;
-      if (obj.heading_lev_markup <= 4) {
-        segnames_0_4 ~= obj.segment_anchor_tag;
-        if (obj.heading_lev_markup == 4) {
-          obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-          if (html_segnames.length > obj.ptr_html_segnames + 1) {
-            obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+      obj.node.ocn = obj_cite_digits.on;
+      obj.node.obj_cite_number = obj_cite_digits.on.to!string;
+      if (obj.node.heading_lev_markup <= 4) {
+        segnames_0_4 ~= obj.tags.segment_anchor_tag;
+        if (obj.node.heading_lev_markup == 4) {
+          obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+          if (html_segnames.length > obj.ptr.html_segnames + 1) {
+            obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
           }
-          assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-          obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+          assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+          obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
         }
       }
       /+ dom structure (marked up & collapsed) +/
@@ -2400,14 +2400,14 @@ if (the_blurb_section.length > 1) {
       || (opt_action.sqlite_discrete)
       || (opt_action.sqlite_update)
       || (opt_action.postgresql)) {
-        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+        obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+        obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
       }
       obj = obj_heading_ancestors(obj, lv_ancestors_txt);
-    } else if (obj.is_a == "blurb") {
+    } else if (obj.typeinfo.is_a == "blurb") {
       obj_cite_digits = ocn_emit(OCNstatus.off);
-      obj.obj_cite_number_off  = obj_cite_digits.off.to!string;
-      obj.obj_cite_number_type = OCNtype.non;
+      obj.misc.obj_cite_number_off  = obj_cite_digits.off.to!string;
+      obj.misc.obj_cite_number_type = OCNtype.non;
     }
   }
 }
@@ -2420,30 +2420,30 @@ if (the_blurb_section.length > 1) {
   /+ TODO
     - note create/insert heading object sole purpose eof close all open tags
       sort out:
-      - obj.dom_markedup = dom_markedup;
-      - obj.dom_collapsed = dom_collapsed;
+      - obj.node.dom_markedup = dom_markedup;
+      - obj.node.dom_collapsed = dom_collapsed;
   +/
-comp_obj_heading_                       = comp_obj_heading_.init;
-comp_obj_heading_.of_part               = "empty";
-comp_obj_heading_.of_section            = "empty";
-comp_obj_heading_.is_of                 = "para";
-comp_obj_heading_.is_a                  = "heading";
-comp_obj_heading_.ocn                   = 0;
-comp_obj_para.obj_cite_number           = "";
-comp_obj_para.obj_cite_number_off       = "";
-comp_obj_para.obj_cite_number_type      = 0;
-comp_obj_heading_.segment_anchor_tag    = "";
-comp_obj_heading_.marked_up_level       = "";
-comp_obj_heading_.heading_lev_markup    = 9;
-comp_obj_heading_.heading_lev_collapsed = 9;
-comp_obj_heading_.parent_ocn            = 0;
-comp_obj_heading_.parent_lev_markup     = 0;
-comp_obj_heading_.dom_markedup          = dom_markedup.dup;
-comp_obj_heading_.dom_collapsed         = dom_collapsed.dup;
+comp_obj_heading_                            = comp_obj_heading_.init;
+comp_obj_heading_.typeinfo.of_part           = "empty";
+comp_obj_heading_.typeinfo.of_section        = "empty";
+comp_obj_heading_.typeinfo.is_of             = "para";
+comp_obj_heading_.typeinfo.is_a              = "heading";
+comp_obj_heading_.node.ocn                   = 0;
+comp_obj_para.node.obj_cite_number           = "";
+comp_obj_para.misc.obj_cite_number_off       = "";
+comp_obj_para.misc.obj_cite_number_type      = 0;
+comp_obj_heading_.tags.segment_anchor_tag    = "";
+comp_obj_heading_.node.marked_up_level       = "";
+comp_obj_heading_.node.heading_lev_markup    = 9;
+comp_obj_heading_.node.heading_lev_collapsed = 9;
+comp_obj_heading_.node.parent_ocn            = 0;
+comp_obj_heading_.node.parent_lev_markup     = 0;
+comp_obj_heading_.node.dom_markedup          = dom_markedup.dup;
+comp_obj_heading_.node.dom_collapsed         = dom_collapsed.dup;
 comp_obj_heading_ = obj_dom_structure_set_markup_tags(comp_obj_heading_, dom_markedup, 0);
 comp_obj_heading_ = obj_dom_set_collapsed_tags(comp_obj_heading_, dom_collapsed, 0);
 comp_obj_heading_ = obj_heading_ancestors(comp_obj_heading_, lv_ancestors_txt);
-// the_dom_tail_section                    ~= comp_obj_heading_; // remove tail for now, decide on later
+// the_dom_tail_section                      ~= comp_obj_heading_; // remove tail for now, decide on later
 #+END_SRC
 
 ** 4. _return document tuple_                                           :post:
@@ -2536,16 +2536,16 @@ destroy(the_blurb_section);
 destroy(html_segnames);
 destroy(bookindex_unordered_hashes);
 destroy(an_object);
-biblio_arr_json = [];
-obj_cite_digits=ocn_emit(OCNstatus.reset);
-obj_cite_digit_=0;
-html_segnames_ptr=0;
-html_segnames_ptr_cntr=0;
-content_non_header = "8";
-dom_markedup = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
-dom_markedup_buffer = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
-dom_collapsed = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
-dom_collapsed_buffer = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
+obj_cite_digits        = ocn_emit(OCNstatus.reset);
+biblio_arr_json        = [];
+obj_cite_digit_        = 0;
+html_segnames_ptr      = 0;
+html_segnames_ptr_cntr = 0;
+content_non_header     = "8";
+dom_markedup           = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
+dom_markedup_buffer    = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
+dom_collapsed          = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
+dom_collapsed_buffer   = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
 #+END_SRC
 
 *** [#A] _return document tuple_                               :return:tuple:
@@ -3395,19 +3395,19 @@ void _poem_block_(L,O,T,C,N,CMM)(
           an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
           anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
           comp_obj_block                            = comp_obj_block.init;
-          comp_obj_block.of_part                    = "body";
-          comp_obj_block.of_section                 = "body";
-          comp_obj_block.is_of                      = "block";
-          comp_obj_block.is_a                       = "verse";
-          comp_obj_block.ocn                        = obj_cite_digits.on;
-          comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-          comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-          comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-          comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+          comp_obj_block.typeinfo.of_part           = "body";
+          comp_obj_block.typeinfo.of_section        = "body";
+          comp_obj_block.typeinfo.is_of             = "block";
+          comp_obj_block.typeinfo.is_a              = "verse";
+          comp_obj_block.node.ocn                   = obj_cite_digits.on;
+          comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+          comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+          comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+          comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
           comp_obj_block.text                       = an_object["substantive"];
-          comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-          comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-          comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+          comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+          comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+          comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
           the_document_body_section                 ~= comp_obj_block;
         }
         object_reset(an_object);
@@ -3453,19 +3453,19 @@ void _poem_block_(L,O,T,C,N,CMM)(
         an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
         anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
         comp_obj_block                            = comp_obj_block.init;
-        comp_obj_block.of_part                    = "body";
-        comp_obj_block.of_section                 = "body";
-        comp_obj_block.is_of                      = "block";
-        comp_obj_block.is_a                       = "verse";
-        comp_obj_block.ocn                        = obj_cite_digits.on;
-        comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-        comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-        comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-        comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+        comp_obj_block.typeinfo.of_part           = "body";
+        comp_obj_block.typeinfo.of_section        = "body";
+        comp_obj_block.typeinfo.is_of             = "block";
+        comp_obj_block.typeinfo.is_a              = "verse";
+        comp_obj_block.node.ocn                   = obj_cite_digits.on;
+        comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+        comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+        comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+        comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
         comp_obj_block.text                       = an_object["substantive"];
-        comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-        comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-        comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+        comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+        comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+        comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
         the_document_body_section                 ~= comp_obj_block;
         object_reset(an_object);
         processing.remove("verse");
@@ -3496,19 +3496,19 @@ void _poem_block_(L,O,T,C,N,CMM)(
         an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
         anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
         comp_obj_block                            = comp_obj_block.init;
-        comp_obj_block.of_part                    = "body";
-        comp_obj_block.of_section                 = "body";
-        comp_obj_block.is_of                      = "block";
-        comp_obj_block.is_a                       = "verse";
-        comp_obj_block.ocn                        = obj_cite_digits.on;
-        comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-        comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-        comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-        comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+        comp_obj_block.typeinfo.of_part           = "body";
+        comp_obj_block.typeinfo.of_section        = "body";
+        comp_obj_block.typeinfo.is_of             = "block";
+        comp_obj_block.typeinfo.is_a              = "verse";
+        comp_obj_block.node.ocn                   = obj_cite_digits.on;
+        comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+        comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+        comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+        comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
         comp_obj_block.text                       = an_object["substantive"];
-        comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-        comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-        comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+        comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+        comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+        comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
         the_document_body_section                 ~= comp_obj_block;
         obj_cite_number_poem["end"]               = obj_cite_digits.on.to!string;
         object_reset(an_object);
@@ -3554,19 +3554,19 @@ void _poem_block_(L,O,T,C,N,CMM)(
         an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
         anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
         comp_obj_block                            = comp_obj_block.init;
-        comp_obj_block.of_part                    = "body";
-        comp_obj_block.of_section                 = "body";
-        comp_obj_block.is_of                      = "block";
-        comp_obj_block.is_a                       = "verse";
-        comp_obj_block.ocn                        = obj_cite_digits.on;
-        comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-        comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-        comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-        comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+        comp_obj_block.typeinfo.of_part           = "body";
+        comp_obj_block.typeinfo.of_section        = "body";
+        comp_obj_block.typeinfo.is_of             = "block";
+        comp_obj_block.typeinfo.is_a              = "verse";
+        comp_obj_block.node.ocn                   = obj_cite_digits.on;
+        comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+        comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+        comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+        comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
         comp_obj_block.text                       = an_object["substantive"];
-        comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-        comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-        comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+        comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+        comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+        comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
         the_document_body_section                 ~= comp_obj_block;
         object_reset(an_object);
         processing.remove("verse");
@@ -3696,15 +3696,15 @@ void _table_closed_make_special_notation_table_(N,CMM)(
     an_object["is"] = "table";
     auto substantive_obj_misc_tuple
       = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, "body_nugget", conf_make_meta);
-    an_object["substantive"]             = substantive_obj_misc_tuple[sObj.content];
-    comp_obj_block.ocn                   = obj_cite_digits.on;
-    comp_obj_block.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-    comp_obj_block.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-    comp_obj_block.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-    comp_obj_block.obj_cite_number_type  = obj_cite_digits.type;
-    comp_obj_block                       = table_instructions(comp_obj_block, an_object["table_head"]);
-    comp_obj_block                       = table_substantive_munge_special(comp_obj_block, an_object["substantive"]);
-    the_document_body_section            ~= comp_obj_block;
+    an_object["substantive"]                  = substantive_obj_misc_tuple[sObj.content];
+    comp_obj_block.node.ocn                   = obj_cite_digits.on;
+    comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+    comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+    comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+    comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
+    comp_obj_block                            = table_instructions(comp_obj_block, an_object["table_head"]);
+    comp_obj_block                            = table_substantive_munge_special(comp_obj_block, an_object["substantive"]);
+    the_document_body_section                 ~= comp_obj_block;
     object_reset(an_object);
     processing.remove("verse");
     ++cntr;
@@ -3771,19 +3771,19 @@ void _block_flag_line_empty_(B,N,CMM)(
     an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
     anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
     comp_obj_block                            = comp_obj_block.init;
-    comp_obj_block.of_part                    = "body";
-    comp_obj_block.of_section                 = "body";
-    comp_obj_block.is_of                      = "block";
-    comp_obj_block.is_a                       = "quote";
-    comp_obj_block.ocn                        = obj_cite_digits.on;
-    comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-    comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-    comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-    comp_obj_block.obj_cite_number_type       = obj_cite_digit_type;
+    comp_obj_block.typeinfo.of_part           = "body";
+    comp_obj_block.typeinfo.of_section        = "body";
+    comp_obj_block.typeinfo.is_of             = "block";
+    comp_obj_block.typeinfo.is_a              = "quote";
+    comp_obj_block.node.ocn                   = obj_cite_digits.on;
+    comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+    comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+    comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+    comp_obj_block.misc.obj_cite_number_type  = obj_cite_digit_type;
     comp_obj_block.text                       = an_object["substantive"];
-    comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-    comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-    comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+    comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+    comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+    comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
     the_document_body_section                 ~= comp_obj_block;
     obj_type_status["blocks"]                 = TriState.off;
     obj_type_status["quote"]                  = TriState.off;
@@ -3821,19 +3821,19 @@ void _block_flag_line_empty_(B,N,CMM)(
     an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
     anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
     comp_obj_block                            = comp_obj_block.init;
-    comp_obj_block.of_part                    = "body";
-    comp_obj_block.of_section                 = "body";
-    comp_obj_block.is_of                      = "block";
-    comp_obj_block.is_a                       = "group";
-    comp_obj_block.ocn                        = obj_cite_digits.on;
-    comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-    comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-    comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-    comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+    comp_obj_block.typeinfo.of_part           = "body";
+    comp_obj_block.typeinfo.of_section        = "body";
+    comp_obj_block.typeinfo.is_of             = "block";
+    comp_obj_block.typeinfo.is_a              = "group";
+    comp_obj_block.node.ocn                   = obj_cite_digits.on;
+    comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+    comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+    comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+    comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
     comp_obj_block.text                       = an_object["substantive"];
-    comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-    comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-    comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+    comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+    comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+    comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
     the_document_body_section                 ~= comp_obj_block;
     obj_type_status["blocks"]                 = TriState.off;
     obj_type_status["group"]                  = TriState.off;
@@ -3870,19 +3870,19 @@ void _block_flag_line_empty_(B,N,CMM)(
       = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta);
     an_object["substantive"]                  = substantive_obj_misc_tuple[sObj.content];
     comp_obj_block                            = comp_obj_block.init;
-    comp_obj_block.of_part                    = "body";
-    comp_obj_block.of_section                 = "body";
-    comp_obj_block.is_of                      = "block";
-    comp_obj_block.is_a                       = "block";
-    comp_obj_block.ocn                        = obj_cite_digits.on;
-    comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-    comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-    comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-    comp_obj_block.obj_cite_number_type       = obj_cite_digit_type;
+    comp_obj_block.typeinfo.of_part           = "body";
+    comp_obj_block.typeinfo.of_section        = "body";
+    comp_obj_block.typeinfo.is_of             = "block";
+    comp_obj_block.typeinfo.is_a              = "block";
+    comp_obj_block.node.ocn                   = obj_cite_digits.on;
+    comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+    comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+    comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+    comp_obj_block.misc.obj_cite_number_type  = obj_cite_digit_type;
     comp_obj_block.text                       = an_object["substantive"];
-    comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-    comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-    comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+    comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+    comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+    comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
     the_document_body_section                 ~= comp_obj_block;
     obj_type_status["blocks"]                 = TriState.off;
     obj_type_status["block"]                  = TriState.off;
@@ -3914,20 +3914,20 @@ void _block_flag_line_empty_(B,N,CMM)(
         heading_ptr-1,
         an_object["is"]
       );
-    comp_obj_poem_ocn                         = comp_obj_poem_ocn.init;
-    comp_obj_poem_ocn.of_part                 = "body";
-    comp_obj_poem_ocn.of_section              = "body";
-    comp_obj_poem_ocn.is_of                   = "block";
-    comp_obj_poem_ocn.is_a                    = "poem";
-    comp_obj_poem_ocn.ocn                     = obj_cite_digits.on;
-    comp_obj_poem_ocn.obj_cite_number         = (obj_cite_number_poem["start"] ~ "..." ~ obj_cite_number_poem["end"]);
-    comp_obj_poem_ocn.obj_cite_number_off     = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string; //
-    comp_obj_poem_ocn.obj_cite_number_bkidx   = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string; //
-    comp_obj_poem_ocn.obj_cite_number_type    = obj_cite_digits.type;
-    comp_obj_poem_ocn.text                    = "";
-    the_document_body_section                 ~= comp_obj_poem_ocn;
-    obj_type_status["blocks"]                 = TriState.off;
-    obj_type_status["poem"]                   = TriState.off;
+    comp_obj_poem_ocn                            = comp_obj_poem_ocn.init;
+    comp_obj_poem_ocn.typeinfo.of_part           = "body";
+    comp_obj_poem_ocn.typeinfo.of_section        = "body";
+    comp_obj_poem_ocn.typeinfo.is_of             = "block";
+    comp_obj_poem_ocn.typeinfo.is_a              = "poem";
+    comp_obj_poem_ocn.node.ocn                   = obj_cite_digits.on;
+    comp_obj_poem_ocn.node.obj_cite_number       = (obj_cite_number_poem["start"] ~ "..." ~ obj_cite_number_poem["end"]);
+    comp_obj_poem_ocn.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string; //
+    comp_obj_poem_ocn.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string; //
+    comp_obj_poem_ocn.misc.obj_cite_number_type  = obj_cite_digits.type;
+    comp_obj_poem_ocn.text                        = "";
+    the_document_body_section                     ~= comp_obj_poem_ocn;
+    obj_type_status["blocks"]                     = TriState.off;
+    obj_type_status["poem"]                       = TriState.off;
     object_reset(an_object);
     processing.remove("verse");
 #+END_SRC
@@ -3961,19 +3961,19 @@ void _block_flag_line_empty_(B,N,CMM)(
     an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
     anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
     comp_obj_code                             = comp_obj_code.init;
-    comp_obj_code.of_part                     = "body";
-    comp_obj_code.of_section                  = "body";
-    comp_obj_code.is_of                       = "block";
-    comp_obj_code.is_a                        = "code";
-    comp_obj_code.ocn                         = obj_cite_digits.on;
-    comp_obj_code.obj_cite_number             = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-    comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-    comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-    comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+    comp_obj_code.typeinfo.of_part            = "body";
+    comp_obj_code.typeinfo.of_section         = "body";
+    comp_obj_code.typeinfo.is_of              = "block";
+    comp_obj_code.typeinfo.is_a               = "code";
+    comp_obj_code.node.ocn                    = obj_cite_digits.on;
+    comp_obj_code.node.obj_cite_number        = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+    comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+    comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+    comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
     comp_obj_code.text                        = an_object["substantive"];
-    comp_obj_code.inline_notes_reg            = substantive_obj_misc_tuple[sObj.notes_reg];
-    comp_obj_code.inline_notes_star           = substantive_obj_misc_tuple[sObj.notes_star];
-    comp_obj_code.inline_links                = substantive_obj_misc_tuple[sObj.links];
+    comp_obj_code.has.inline_notes_reg        = substantive_obj_misc_tuple[sObj.notes_reg];
+    comp_obj_code.has.inline_notes_star       = substantive_obj_misc_tuple[sObj.notes_star];
+    comp_obj_code.has.inline_links            = substantive_obj_misc_tuple[sObj.links];
     the_document_body_section                 ~= comp_obj_code;
     obj_type_status["blocks"]                 = TriState.off;
     obj_type_status["code"]                   = TriState.off;
@@ -4011,11 +4011,11 @@ void _block_flag_line_empty_(B,N,CMM)(
       = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta);
     an_object["substantive"]                  = substantive_obj_misc_tuple[sObj.content];
     comp_obj_block                            = comp_obj_block.init;
-    comp_obj_block.ocn                        = obj_cite_digits.on;
-    comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-    comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-    comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-    comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+    comp_obj_block.node.ocn                   = obj_cite_digits.on;
+    comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+    comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+    comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+    comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
     comp_obj_block = table_instructions(comp_obj_block, an_object["table_head"]);
     comp_obj_block = table_substantive_munge(comp_obj_block, an_object["substantive"]);
     the_document_body_section                 ~= comp_obj_block;
@@ -4526,20 +4526,20 @@ auto table_instructions(O,H)(
   return ref H  table_head,
 ) {
   static auto rgx = Rgx();
-  table_object.of_part           = "body";
-  table_object.of_section        = "body";
-  table_object.is_of             = "block";
-  table_object.is_a              = "table";
-  table_object.inline_notes_reg  = false;
-  table_object.inline_notes_star = false;
-  table_object.inline_links      = false;
+  table_object.typeinfo.of_part         = "body";
+  table_object.typeinfo.of_section      = "body";
+  table_object.typeinfo.is_of           = "block";
+  table_object.typeinfo.is_a            = "table";
+  table_object.has.inline_notes_reg     = false;
+  table_object.has.inline_notes_star    = false;
+  table_object.has.inline_links         = false;
   if (auto m = table_head.matchFirst(rgx.table_head_instructions)) {
-    table_object.table_heading = ((m["c_heading"].length > 0) && (m["c_heading"] == "h")) ? true : false;
-    table_object.table_number_of_columns = ((m["c_num"].length > 0) && (m["c_num"].to!int > 0)) ? m["c_num"].to!int : 0; // double check, may be obsolete
+    table_object.table.heading = ((m["c_heading"].length > 0) && (m["c_heading"] == "h")) ? true : false;
+    table_object.table.number_of_columns = ((m["c_num"].length > 0) && (m["c_num"].to!int > 0)) ? m["c_num"].to!int : 0; // double check, may be obsolete
     foreach (cw; m["c_widths"].matchAll(rgx.table_col_widths)) {
       auto x = cw.hit.matchFirst(rgx.table_col_widths_and_alignment);
-      table_object.table_column_widths ~= x["width"].to!int;
-      table_object.table_column_aligns ~= (x["align"].empty) ? "" : x["align"];
+      table_object.table.column_widths ~= x["width"].to!int;
+      table_object.table.column_aligns ~= (x["align"].empty) ? "" : x["align"];
     }
   }
   return table_object;
@@ -4587,26 +4587,26 @@ auto table_array_munge(O,T)(
       }
       col_num_ = idx_c;
       _table_substantive ~= col ~ mng.tc_s;
-      if (idx_r == 0 && comp_obj_block.table_heading) {
+      if (idx_r == 0 && comp_obj_block.table.heading) {
       } else if (col.match(rgx.numeric_col) && idx_r == 1) { // conditions reversed to avoid: gdc compiled program run segfault
-        if ((comp_obj_block.table_column_aligns.length > idx_c)
-        && (comp_obj_block.table_column_aligns[idx_c].matchFirst(rgx.table_col_align_match))) {
-          comp_obj_block.table_column_aligns[idx_c]
-            = comp_obj_block.table_column_aligns[idx_c];
-        } else if (comp_obj_block.table_column_aligns.length > idx_c) {
-          comp_obj_block.table_column_aligns[idx_c] = "r";
+        if ((comp_obj_block.table.column_aligns.length > idx_c)
+        && (comp_obj_block.table.column_aligns[idx_c].matchFirst(rgx.table_col_align_match))) {
+          comp_obj_block.table.column_aligns[idx_c]
+            = comp_obj_block.table.column_aligns[idx_c];
+        } else if (comp_obj_block.table.column_aligns.length > idx_c) {
+          comp_obj_block.table.column_aligns[idx_c] = "r";
         } else {
-          comp_obj_block.table_column_aligns ~= "r";
+          comp_obj_block.table.column_aligns ~= "r";
         }
       } else if (idx_r == 1) {
-        if ((comp_obj_block.table_column_aligns.length > idx_c)
-        && (comp_obj_block.table_column_aligns[idx_c].matchFirst(rgx.table_col_align_match))) {
-          comp_obj_block.table_column_aligns[idx_c]
-            = comp_obj_block.table_column_aligns[idx_c];
-        } else if (comp_obj_block.table_column_aligns.length > idx_c) {
-          comp_obj_block.table_column_aligns[idx_c] = "l";
+        if ((comp_obj_block.table.column_aligns.length > idx_c)
+        && (comp_obj_block.table.column_aligns[idx_c].matchFirst(rgx.table_col_align_match))) {
+          comp_obj_block.table.column_aligns[idx_c]
+            = comp_obj_block.table.column_aligns[idx_c];
+        } else if (comp_obj_block.table.column_aligns.length > idx_c) {
+          comp_obj_block.table.column_aligns[idx_c] = "l";
         } else {
-          comp_obj_block.table_column_aligns ~= "l";
+          comp_obj_block.table.column_aligns ~= "l";
         }
       }
     }
@@ -4620,55 +4620,55 @@ auto table_array_munge(O,T)(
     }
     _table_substantive = _table_substantive.replaceFirst(rgx.table_col_separator_nl, "\n");
   }
-  if (comp_obj_block.table_number_of_columns != col_num) {
-    if (comp_obj_block.table_number_of_columns == 0) {
-      comp_obj_block.table_number_of_columns = (col_num).to!int;
+  if (comp_obj_block.table.number_of_columns != col_num) {
+    if (comp_obj_block.table.number_of_columns == 0) {
+      comp_obj_block.table.number_of_columns = (col_num).to!int;
     } else {
       debug(table_dev) {
-        writeln(comp_obj_block.table_number_of_columns, " != ", col_num);
+        writeln(comp_obj_block.table.number_of_columns, " != ", col_num);
       }
     }
   }
-  if (table_object.table_number_of_columns == 0
-  && table_object.table_column_widths.length > 0) {
+  if (table_object.table.number_of_columns == 0
+  && table_object.table.column_widths.length > 0) {
       writeln(__LINE__, " ERROR");
   }
-  if (table_object.table_number_of_columns > 0
-  && table_object.table_column_widths.length == 0) {
-    double col_w = (100.00 / table_object.table_number_of_columns);
-    foreach (i; 0..table_object.table_number_of_columns) {
-      table_object.table_column_widths ~= col_w;
+  if (table_object.table.number_of_columns > 0
+  && table_object.table.column_widths.length == 0) {
+    double col_w = (100.00 / table_object.table.number_of_columns);
+    foreach (i; 0..table_object.table.number_of_columns) {
+      table_object.table.column_widths ~= col_w;
     }
-  } else if (table_object.table_number_of_columns
-  != table_object.table_column_widths.length) {
+  } else if (table_object.table.number_of_columns
+  != table_object.table.column_widths.length) {
     debug(table_dev) {
       writeln(m.hit); // further logic required
     }
-    if (table_object.table_number_of_columns > table_object.table_column_widths.length) {
-      double col_w = (100.00 - (table_object.table_column_widths).sum)
-        / (table_object.table_number_of_columns - table_object.table_column_widths.length);
-      foreach (i; 0..table_object.table_column_widths.length) {
-        table_object.table_column_widths ~= col_w;
+    if (table_object.table.number_of_columns > table_object.table.column_widths.length) {
+      double col_w = (100.00 - (table_object.table.column_widths).sum)
+        / (table_object.table.number_of_columns - table_object.table.column_widths.length);
+      foreach (i; 0..table_object.table.column_widths.length) {
+        table_object.table.column_widths ~= col_w;
       }
-      foreach (i; 0..(table_object.table_number_of_columns - table_object.table_column_widths.length)) {
-        table_object.table_column_widths ~= col_w;
+      foreach (i; 0..(table_object.table.number_of_columns - table_object.table.column_widths.length)) {
+        table_object.table.column_widths ~= col_w;
       }
-    } else if (table_object.table_number_of_columns < table_object.table_column_widths.length) {
+    } else if (table_object.table.number_of_columns < table_object.table.column_widths.length) {
       writeln(__LINE__, " warning, ERROR");
     }
   }
-  if (table_object.table_column_widths.sum > 101
-  || table_object.table_column_widths.sum < 95 ) {
-    writeln("sum: ", table_object.table_column_widths.sum,
-      ", array: ", table_object.table_column_widths,
-      ", cols: ", table_object.table_number_of_columns);
+  if (table_object.table.column_widths.sum > 101
+  || table_object.table.column_widths.sum < 95 ) {
+    writeln("sum: ", table_object.table.column_widths.sum,
+      ", array: ", table_object.table.column_widths,
+      ", cols: ", table_object.table.number_of_columns);
     writeln(_table_substantive);
   }
   debug(table_res) {
-    writeln("aligns: ", comp_obj_block.table_column_aligns, "\n",
-      "no. of columns: ", comp_obj_block.table_number_of_columns, "\n",
-      "col widths: ", comp_obj_block.table_column_widths,
-        " sum: ", comp_obj_block.table_column_widths.sum, "\n",
+    writeln("aligns: ", comp_obj_block.table.column_aligns, "\n",
+      "no. of columns: ", comp_obj_block.table.number_of_columns, "\n",
+      "col widths: ", comp_obj_block.table.column_widths,
+        " sum: ", comp_obj_block.table.column_widths.sum, "\n",
       _table_substantive);
   }
   comp_obj_block.text = _table_substantive;
@@ -5441,19 +5441,19 @@ static struct ObjInlineMarkup {
       );
       toc_txt_= munge.url_links(toc_txt_);
       comp_obj_toc                            = comp_obj_toc.init;
-      comp_obj_toc.of_part                    = "frontmatter";
-      comp_obj_toc.of_section                 = "toc";
-      comp_obj_toc.is_of                      = "para";
-      comp_obj_toc.is_a                       = "toc";
-      comp_obj_toc.ocn                        = 0;
-      comp_obj_toc.obj_cite_number            = "";
-      comp_obj_toc.obj_cite_number_off        = "";
-      comp_obj_toc.obj_cite_number_type       = 0;
-      comp_obj_toc.indent_hang                = indent["hang_position"];
-      comp_obj_toc.indent_base                = indent["base_position"];
-      comp_obj_toc.bullet                     = false;
+      comp_obj_toc.typeinfo.of_part           = "frontmatter";
+      comp_obj_toc.typeinfo.of_section        = "toc";
+      comp_obj_toc.typeinfo.is_of             = "para";
+      comp_obj_toc.typeinfo.is_a              = "toc";
+      comp_obj_toc.node.ocn                   = 0;
+      comp_obj_toc.node.obj_cite_number       = "";
+      comp_obj_toc.misc.obj_cite_number_off   = "";
+      comp_obj_toc.misc.obj_cite_number_type  = 0;
+      comp_obj_toc.attrib.indent_hang         = indent["hang_position"];
+      comp_obj_toc.attrib.indent_base         = indent["base_position"];
+      comp_obj_toc.attrib.bullet              = false;
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["scroll"] ~= comp_obj_toc;
     } else {
       indent=[
@@ -5461,32 +5461,32 @@ static struct ObjInlineMarkup {
         "base_position" : 0,
       ];
       comp_obj_toc                            = comp_obj_toc.init;
-      comp_obj_toc.of_part                    = "frontmatter";
-      comp_obj_toc.of_section                 = "toc";
-      comp_obj_toc.is_of                      = "para";
-      comp_obj_toc.is_a                       = "toc";
-      comp_obj_toc.ocn                        = 0;
-      comp_obj_toc.obj_cite_number            = "";
-      comp_obj_toc.obj_cite_number_off        = "";
-      comp_obj_toc.obj_cite_number_type       = 0;
-      comp_obj_toc.indent_hang                = indent["hang_position"];
-      comp_obj_toc.indent_base                = indent["base_position"];
-      comp_obj_toc.bullet                     = false;
+      comp_obj_toc.typeinfo.of_part           = "frontmatter";
+      comp_obj_toc.typeinfo.of_section        = "toc";
+      comp_obj_toc.typeinfo.is_of             = "para";
+      comp_obj_toc.typeinfo.is_a              = "toc";
+      comp_obj_toc.node.ocn                   = 0;
+      comp_obj_toc.node.obj_cite_number       = "";
+      comp_obj_toc.misc.obj_cite_number_off   = "";
+      comp_obj_toc.misc.obj_cite_number_type  = 0;
+      comp_obj_toc.attrib.indent_hang         = indent["hang_position"];
+      comp_obj_toc.attrib.indent_base         = indent["base_position"];
+      comp_obj_toc.attrib.bullet              = false;
       comp_obj_toc.text                       = "Table of Contents";
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["scroll"] ~= comp_obj_toc;
     }
     comp_obj_toc                              = comp_obj_toc.init;
-    comp_obj_toc.of_part                      = "frontmatter";
-    comp_obj_toc.of_section                   = "toc";
-    comp_obj_toc.is_of                        = "para";
-    comp_obj_toc.is_a                         = "toc";
-    comp_obj_toc.ocn                          = 0;
-    comp_obj_toc.obj_cite_number              = "";
-    comp_obj_toc.obj_cite_number_off          = "";
-    comp_obj_toc.obj_cite_number_type         = 0;
-    comp_obj_toc.bullet                       = false;
-    comp_obj_toc.inline_links                 = true;
+    comp_obj_toc.typeinfo.of_part             = "frontmatter";
+    comp_obj_toc.typeinfo.of_section          = "toc";
+    comp_obj_toc.typeinfo.is_of               = "para";
+    comp_obj_toc.typeinfo.is_a                = "toc";
+    comp_obj_toc.node.ocn                     = 0;
+    comp_obj_toc.node.obj_cite_number         = "";
+    comp_obj_toc.misc.obj_cite_number_off     = "";
+    comp_obj_toc.misc.obj_cite_number_type    = 0;
+    comp_obj_toc.attrib.bullet                = false;
+    comp_obj_toc.has.inline_links             = true;
     switch (obj_["lev_markup_number"].to!int) {
     case 0:
       indent=[
@@ -5495,10 +5495,10 @@ static struct ObjInlineMarkup {
       ];
       toc_txt_ = "{ Table of Contents }" ~ mkup.mark_internal_site_lnk ~ "toc.fnSuffix";
       toc_txt_= munge.url_links(toc_txt_);
-      comp_obj_toc.indent_hang                = indent["hang_position"];
-      comp_obj_toc.indent_base                = indent["base_position"];
+      comp_obj_toc.attrib.indent_hang         = indent["hang_position"];
+      comp_obj_toc.attrib.indent_base         = indent["base_position"];
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["seg"]    ~= comp_obj_toc;
       break;
     case 1: .. case 3:
@@ -5511,10 +5511,10 @@ static struct ObjInlineMarkup {
         heading_toc_,
       );
       toc_txt_= munge.url_links(toc_txt_);
-      comp_obj_toc.indent_hang                = indent["hang_position"];
-      comp_obj_toc.indent_base                = indent["base_position"];
+      comp_obj_toc.attrib.indent_hang         = indent["hang_position"];
+      comp_obj_toc.attrib.indent_base         = indent["base_position"];
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["seg"]    ~= comp_obj_toc;
       break;
     case 4:
@@ -5531,10 +5531,10 @@ static struct ObjInlineMarkup {
         "hang_position" : obj_["lev_markup_number"].to!int,
         "base_position" : obj_["lev_markup_number"].to!int,
       ];
-      comp_obj_toc.indent_hang                = indent["hang_position"];
-      comp_obj_toc.indent_base                = indent["base_position"];
+      comp_obj_toc.attrib.indent_hang         = indent["hang_position"];
+      comp_obj_toc.attrib.indent_base         = indent["base_position"];
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["seg"]    ~= comp_obj_toc;
       break;
     case 5: .. case 7:
@@ -5560,10 +5560,10 @@ static struct ObjInlineMarkup {
         "hang_position" : obj_["lev_markup_number"].to!int,
         "base_position" : obj_["lev_markup_number"].to!int,
       ];
-      comp_obj_toc.indent_hang                = indent["hang_position"];
-      comp_obj_toc.indent_base                = indent["base_position"];
+      comp_obj_toc.attrib.indent_hang         = indent["hang_position"];
+      comp_obj_toc.attrib.indent_base         = indent["base_position"];
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["seg"]    ~= comp_obj_toc;
       break;
     default:
@@ -6108,16 +6108,16 @@ struct ObjAttributes {
       (oa_j.type == JSON_TYPE.OBJECT)
     );
     if (obj_is_ == "heading") {
-      oa_j.object["obj_cite_number"] = _comp_obj_heading.ocn;
-      oa_j.object["lev_markup_number"] = _comp_obj_heading.heading_lev_markup;
-      oa_j.object["lev_collapsed_number"] = _comp_obj_heading.heading_lev_collapsed;
+      oa_j.object["obj_cite_number"] = _comp_obj_heading.node.ocn;
+      oa_j.object["lev_markup_number"] = _comp_obj_heading.node.heading_lev_markup;
+      oa_j.object["lev_collapsed_number"] = _comp_obj_heading.node.heading_lev_collapsed;
       oa_j.object["heading_ptr"]
-        = _comp_obj_heading.ptr_heading;
+        = _comp_obj_heading.ptr.heading;
       oa_j.object["doc_object_ptr"]
-        = _comp_obj_heading.ptr_doc_object;
+        = _comp_obj_heading.ptr.doc_object;
     }
-    oa_j.object["parent_obj_cite_number"] = _comp_obj_heading.parent_ocn;
-    oa_j.object["parent_lev_markup_number"] = _comp_obj_heading.parent_lev_markup;
+    oa_j.object["parent_obj_cite_number"] = _comp_obj_heading.node.parent_ocn;
+    oa_j.object["parent_lev_markup_number"] = _comp_obj_heading.node.parent_lev_markup;
     _obj_attrib = oa_j.toString();
     return _obj_attrib;
   }
@@ -6330,46 +6330,46 @@ struct BookIndexReportSection {
     && opt_action.section_bookindex)) {
       string bi_tmp_seg, bi_tmp_scroll;
       string[] bi_tmp_tags;
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "backmatter";
-      comp_obj_heading_.of_section            = "bookindex";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "Book Index";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.segment_anchor_tag    = "_part_book_index";
-      comp_obj_heading_.marked_up_level       = "B";
-      comp_obj_heading_.heading_lev_markup    = 1;
-      comp_obj_heading_.heading_lev_collapsed = 1;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      comp_obj_heading.inline_links           = true;
-      bookindex_section["scroll"]             ~= comp_obj_heading_;
-      bookindex_section["seg"]                ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "backmatter";
+      comp_obj_heading_.typeinfo.of_section        = "bookindex";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "Book Index";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.tags.segment_anchor_tag    = "_part_book_index";
+      comp_obj_heading_.node.marked_up_level       = "B";
+      comp_obj_heading_.node.heading_lev_markup    = 1;
+      comp_obj_heading_.node.heading_lev_collapsed = 1;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      comp_obj_heading.has.inline_links            = true;
+      bookindex_section["scroll"]                  ~= comp_obj_heading_;
+      bookindex_section["seg"]                     ~= comp_obj_heading_;
       ++mkn;
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "backmatter";
-      comp_obj_heading_.of_section            = "bookindex";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "Index";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.segment_anchor_tag    = "bookindex";
-      comp_obj_heading_.marked_up_level       = "1";
-      comp_obj_heading_.heading_lev_markup    = 4;
-      comp_obj_heading_.heading_lev_collapsed = 2;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      comp_obj_heading.inline_links           = false;
-      comp_obj_heading_.anchor_tags           = ["bookindex"];
-      bookindex_section["scroll"]             ~= comp_obj_heading_;
-      bookindex_section["seg"]                ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "backmatter";
+      comp_obj_heading_.typeinfo.of_section        = "bookindex";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "Index";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.tags.segment_anchor_tag    = "bookindex";
+      comp_obj_heading_.node.marked_up_level       = "1";
+      comp_obj_heading_.node.heading_lev_markup    = 4;
+      comp_obj_heading_.node.heading_lev_collapsed = 2;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      comp_obj_heading.has.inline_links            = false;
+      comp_obj_heading_.tags.anchor_tags           = ["bookindex"];
+      bookindex_section["scroll"]                  ~= comp_obj_heading_;
+      bookindex_section["seg"]                     ~= comp_obj_heading_;
       ++mkn;
       import std.array : appender;
       auto buffer = appender!(char[])();
@@ -6426,42 +6426,42 @@ struct BookIndexReportSection {
           bi_tmp_seg ~= " \\\\\n    ";
           ++skn;
         }
-        bi_tmp_scroll                       = (bi_tmp_scroll).replaceFirst(rgx.trailing_linebreak, "");
-        bi_tmp_seg                          = (bi_tmp_seg).replaceFirst(rgx.trailing_linebreak, "");
-        comp_obj_para                       = comp_obj_para.init;
-        comp_obj_para.of_part               = "backmatter";
-        comp_obj_para.of_section            = "bookindex";
-        comp_obj_para.is_of                 = "para";
-        comp_obj_para.is_a                  = "bookindex";
-        comp_obj_para.text                  = bi_tmp_scroll.to!string.strip;
-        comp_obj_para.ocn                   = 0;
-        comp_obj_para.obj_cite_number       = "";
-        comp_obj_para.obj_cite_number_off   = "";
-        comp_obj_para.obj_cite_number_type  = 0;
-        comp_obj_para.anchor_tags           = bi_tmp_tags;
-        comp_obj_para.indent_hang           = 0;
-        comp_obj_para.indent_base           = 1;
-        comp_obj_para.bullet                = false;
-        comp_obj_para.inline_links          = true;
-        bookindex_section["scroll"]         ~= comp_obj_para;
-        comp_obj_para.text                  = bi_tmp_seg.to!string.strip;
-        bookindex_section["seg"]            ~= comp_obj_para;
+        bi_tmp_scroll                           = (bi_tmp_scroll).replaceFirst(rgx.trailing_linebreak, "");
+        bi_tmp_seg                              = (bi_tmp_seg).replaceFirst(rgx.trailing_linebreak, "");
+        comp_obj_para                           = comp_obj_para.init;
+        comp_obj_para.typeinfo.of_part          = "backmatter";
+        comp_obj_para.typeinfo.of_section       = "bookindex";
+        comp_obj_para.typeinfo.is_of            = "para";
+        comp_obj_para.typeinfo.is_a             = "bookindex";
+        comp_obj_para.text                      = bi_tmp_scroll.to!string.strip;
+        comp_obj_para.node.ocn                  = 0;
+        comp_obj_para.node.obj_cite_number      = "";
+        comp_obj_para.misc.obj_cite_number_off  = "";
+        comp_obj_para.misc.obj_cite_number_type = 0;
+        comp_obj_para.tags.anchor_tags          = bi_tmp_tags;
+        comp_obj_para.attrib.indent_hang        = 0;
+        comp_obj_para.attrib.indent_base        = 1;
+        comp_obj_para.attrib.bullet             = false;
+        comp_obj_para.has.inline_links          = true;
+        bookindex_section["scroll"]             ~= comp_obj_para;
+        comp_obj_para.text                      = bi_tmp_seg.to!string.strip;
+        bookindex_section["seg"]                ~= comp_obj_para;
         ++mkn;
       }
     } else {                              // no book index, (figure out what to do here)
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.text                  = "(skip) there is no Book Index";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.marked_up_level       = "B";
-      comp_obj_heading_.heading_lev_markup    = 1;
-      comp_obj_heading_.heading_lev_collapsed = 1;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      bookindex_section["scroll"]             ~= comp_obj_heading_;
-      bookindex_section["seg"]                ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.text                       = "(skip) there is no Book Index";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.node.marked_up_level       = "B";
+      comp_obj_heading_.node.heading_lev_markup    = 1;
+      comp_obj_heading_.node.heading_lev_collapsed = 1;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      bookindex_section["scroll"]                  ~= comp_obj_heading_;
+      bookindex_section["seg"]                     ~= comp_obj_heading_;
     }
     auto t = tuple(bookindex_section, obj_cite_digits);
     return t;
@@ -6496,12 +6496,12 @@ struct NotesSection {
     int                   cntr,
   )
   in {
-    assert((contents_am[cntr].is_a == "para")
-    || (contents_am[cntr].is_a == "heading")
-    || (contents_am[cntr].is_a == "quote")
-    || (contents_am[cntr].is_a == "group")
-    || (contents_am[cntr].is_a == "block")
-    || (contents_am[cntr].is_a == "verse"));
+    assert((contents_am[cntr].typeinfo.is_a == "para")
+    || (contents_am[cntr].typeinfo.is_a == "heading")
+    || (contents_am[cntr].typeinfo.is_a == "quote")
+    || (contents_am[cntr].typeinfo.is_a == "group")
+    || (contents_am[cntr].typeinfo.is_a == "block")
+    || (contents_am[cntr].typeinfo.is_a == "verse"));
     assert(cntr >= previous_count);
     previous_count=cntr;
     assert(
@@ -6589,81 +6589,81 @@ struct NotesSection {
     ObjGenericComposite comp_obj_heading_;
     if ((endnotes_["notes"].length > 0)
     && (opt_action.backmatter && opt_action.section_endnotes)) {
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "backmatter";
-      comp_obj_heading_.of_section            = "endnotes";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "Endnotes";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.segment_anchor_tag    = "_part_endnotes";
-      comp_obj_heading_.marked_up_level       = "B";
-      comp_obj_heading_.heading_lev_markup    = 1;
-      comp_obj_heading_.heading_lev_collapsed = 1;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      the_endnotes_section                    ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "backmatter";
+      comp_obj_heading_.typeinfo.of_section        = "endnotes";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "Endnotes";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.tags.segment_anchor_tag    = "_part_endnotes";
+      comp_obj_heading_.node.marked_up_level       = "B";
+      comp_obj_heading_.node.heading_lev_markup    = 1;
+      comp_obj_heading_.node.heading_lev_collapsed = 1;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      the_endnotes_section                         ~= comp_obj_heading_;
       ++mkn;
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "backmatter";
-      comp_obj_heading_.of_section            = "endnotes";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "Endnotes";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.segment_anchor_tag    = "endnotes";
-      comp_obj_heading_.marked_up_level       = "1";
-      comp_obj_heading_.heading_lev_markup    = 4;
-      comp_obj_heading_.heading_lev_collapsed = 2;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      comp_obj_heading_.anchor_tags           = ["endnotes"];
-      the_endnotes_section                    ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "backmatter";
+      comp_obj_heading_.typeinfo.of_section        = "endnotes";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "Endnotes";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.tags.segment_anchor_tag    = "endnotes";
+      comp_obj_heading_.node.marked_up_level       = "1";
+      comp_obj_heading_.node.heading_lev_markup    = 4;
+      comp_obj_heading_.node.heading_lev_collapsed = 2;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      comp_obj_heading_.tags.anchor_tags           = ["endnotes"];
+      the_endnotes_section                         ~= comp_obj_heading_;
       ++mkn;
     } else {
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "empty";
-      comp_obj_heading_.of_section            = "empty";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "(skip) there are no Endnotes";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.marked_up_level       = "B";
-      comp_obj_heading_.heading_lev_markup    = 1;
-      comp_obj_heading_.heading_lev_collapsed = 1;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      the_endnotes_section                    ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "empty";
+      comp_obj_heading_.typeinfo.of_section        = "empty";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "(skip) there are no Endnotes";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.node.marked_up_level       = "B";
+      comp_obj_heading_.node.heading_lev_markup    = 1;
+      comp_obj_heading_.node.heading_lev_collapsed = 1;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      the_endnotes_section                         ~= comp_obj_heading_;
     }
     if (opt_action.backmatter && opt_action.section_endnotes) {
       ObjGenericComposite comp_obj_endnote_;
-      comp_obj_endnote_                       = comp_obj_endnote_.init;
-      comp_obj_endnote_.of_part               = "backmatter";
-      comp_obj_endnote_.of_section            = "endnote";
-      comp_obj_endnote_.is_of                 = "para";
-      comp_obj_endnote_.is_a                  = "endnote";
-      comp_obj_endnote_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_endnote_.indent_hang           = 0;
-      comp_obj_endnote_.indent_base           = 0;
-      comp_obj_endnote_.bullet                = false;
+      comp_obj_endnote_                            = comp_obj_endnote_.init;
+      comp_obj_endnote_.typeinfo.of_part           = "backmatter";
+      comp_obj_endnote_.typeinfo.of_section        = "endnote";
+      comp_obj_endnote_.typeinfo.is_of             = "para";
+      comp_obj_endnote_.typeinfo.is_a              = "endnote";
+      comp_obj_endnote_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_endnote_.attrib.indent_hang         = 0;
+      comp_obj_endnote_.attrib.indent_base         = 0;
+      comp_obj_endnote_.attrib.bullet              = false;
       foreach (i, endnote; endnotes_["notes"]) {
         auto     m                            = endnote.matchFirst(rgx.note_ref);
         string   notenumber                   = m.captures[1].to!string;
         string   anchor_tag                   = "note_" ~ notenumber;
-        comp_obj_endnote_.anchor_tags         = [ endnotes_["anchor"][i] ];
-        comp_obj_endnote_.inline_links        = true;
+        comp_obj_endnote_.tags.anchor_tags    = [ endnotes_["anchor"][i] ];
+        comp_obj_endnote_.has.inline_links    = true;
         comp_obj_endnote_.text                = endnote.strip;
         the_endnotes_section                  ~= comp_obj_endnote_;
       }
@@ -6869,12 +6869,12 @@ struct NodeStructureMetadata {
       p_["obj_cite_number"] = lv4;
     }
     ObjGenericComposite comp_obj_location;
-    comp_obj_location                       = comp_obj_location.init;
-    comp_obj_location.is_a                  = is_;
-    comp_obj_location.ocn                   = obj_cite_digits.on;
-    comp_obj_location.segment_anchor_tag    = segment_anchor_tag.to!string;
-    comp_obj_location.parent_ocn            = p_["obj_cite_number"];
-    comp_obj_location.parent_lev_markup     = p_["lev_markup_number"];
+    comp_obj_location                         = comp_obj_location.init;
+    comp_obj_location.typeinfo.is_a           = is_;
+    comp_obj_location.node.ocn                = obj_cite_digits.on;
+    comp_obj_location.tags.segment_anchor_tag = segment_anchor_tag.to!string;
+    comp_obj_location.node.parent_ocn         = p_["obj_cite_number"];
+    comp_obj_location.node.parent_lev_markup  = p_["lev_markup_number"];
     debug(node) {
       if (lev_markup_number.match(rgx.levels_numbered_headings)) {
         writeln("x ", _node.to!string);
@@ -6882,9 +6882,9 @@ struct NodeStructureMetadata {
         writeln("- ", _node.to!string);
       }
     }
-    assert(comp_obj_location.parent_lev_markup >= 4);
-    assert(comp_obj_location.parent_lev_markup <= 7);
-    assert(comp_obj_location.parent_ocn >= 0);
+    assert(comp_obj_location.node.parent_lev_markup >= 4);
+    assert(comp_obj_location.node.parent_lev_markup <= 7);
+    assert(comp_obj_location.node.parent_ocn >= 0);
     return comp_obj_location;
   }
   invariant() {
@@ -7026,29 +7026,29 @@ struct NodeStructureMetadata {
       break;
     }
     ObjGenericComposite _comp_obj_heading_;
-    _comp_obj_heading_                           = _comp_obj_heading_.init;
-    _comp_obj_heading_.of_part                   = "body";
-    _comp_obj_heading_.of_section                = "body";
-    _comp_obj_heading_.is_of                     = "para";
-    _comp_obj_heading_.is_a                      = "heading";
-    _comp_obj_heading_.text                      = _text.to!string.strip;
-    _comp_obj_heading_.ocn                       = obj_cite_digits.on;
-    _comp_obj_heading_.obj_cite_number           = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-    _comp_obj_heading_.obj_cite_number_off       = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-    _comp_obj_heading_.obj_cite_number_type      = obj_cite_digits.type;
-    _comp_obj_heading_.segment_anchor_tag        = segment_anchor_tag.to!string;
-    _comp_obj_heading_.marked_up_level           = lev;
-    _comp_obj_heading_.heading_lev_markup        = (!(lev_markup_number.empty) ? lev_markup_number.to!int : 0);
-    _comp_obj_heading_.heading_lev_collapsed     = (!(lev_collapsed_number.empty) ? lev_collapsed_number.to!int : 0);
-    _comp_obj_heading_.parent_ocn                = p_["obj_cite_number"];
-    _comp_obj_heading_.parent_lev_markup         = p_["lev_markup_number"];
-    _comp_obj_heading_.heading_ancestors_text    = lv_ancestors_txt;
-    _comp_obj_heading_.ptr_doc_object            = cntr_;
-    _comp_obj_heading_.ptr_html_segnames         = ((lev_markup_number == "4") ? html_segnames_ptr : 0);
-    _comp_obj_heading_.ptr_heading               = ptr_;
-    _comp_obj_heading_.inline_notes_reg          = flag_notes_reg;
-    _comp_obj_heading_.inline_notes_star         = flag_notes_star;
-    _comp_obj_heading_.inline_links              = flag_links;
+    _comp_obj_heading_                               = _comp_obj_heading_.init;
+    _comp_obj_heading_.typeinfo.of_part              = "body";
+    _comp_obj_heading_.typeinfo.of_section           = "body";
+    _comp_obj_heading_.typeinfo.is_of                = "para";
+    _comp_obj_heading_.typeinfo.is_a                 = "heading";
+    _comp_obj_heading_.text                          = _text.to!string.strip;
+    _comp_obj_heading_.node.ocn                      = obj_cite_digits.on;
+    _comp_obj_heading_.node.obj_cite_number          = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+    _comp_obj_heading_.misc.obj_cite_number_off      = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+    _comp_obj_heading_.misc.obj_cite_number_type     = obj_cite_digits.type;
+    _comp_obj_heading_.tags.segment_anchor_tag       = segment_anchor_tag.to!string;
+    _comp_obj_heading_.node.marked_up_level          = lev;
+    _comp_obj_heading_.node.heading_lev_markup       = (!(lev_markup_number.empty) ? lev_markup_number.to!int : 0);
+    _comp_obj_heading_.node.heading_lev_collapsed    = (!(lev_collapsed_number.empty) ? lev_collapsed_number.to!int : 0);
+    _comp_obj_heading_.node.parent_ocn               = p_["obj_cite_number"];
+    _comp_obj_heading_.node.parent_lev_markup        = p_["lev_markup_number"];
+    _comp_obj_heading_.tags.heading_ancestors_text   = lv_ancestors_txt;
+    _comp_obj_heading_.ptr.doc_object                = cntr_;
+    _comp_obj_heading_.ptr.html_segnames             = ((lev_markup_number == "4") ? html_segnames_ptr : 0);
+    _comp_obj_heading_.ptr.heading                   = ptr_;
+    _comp_obj_heading_.has.inline_notes_reg          = flag_notes_reg;
+    _comp_obj_heading_.has.inline_notes_star         = flag_notes_star;
+    _comp_obj_heading_.has.inline_links              = flag_links;
     debug(node) {
       if (lev_markup_number.match(rgx.levels_numbered_headings)) {
         writeln("* ", _node.to!string);
@@ -7059,34 +7059,34 @@ struct NodeStructureMetadata {
         writeln("* ", _node.to!string);
       }
     }
-    assert(_comp_obj_heading_.parent_lev_markup <= 7);
-    assert(_comp_obj_heading_.parent_ocn >= 0);
+    assert(_comp_obj_heading_.node.parent_lev_markup <= 7);
+    assert(_comp_obj_heading_.node.parent_ocn >= 0);
     if (lev_markup_number.match(rgx.levels_numbered_headings)) {
-      assert(_comp_obj_heading_.heading_lev_markup <= 7);
-      assert(_comp_obj_heading_.ocn >= 0);
-      if (_comp_obj_heading_.parent_lev_markup > 0) {
-        assert(_comp_obj_heading_.parent_lev_markup < _comp_obj_heading_.heading_lev_markup);
-        if (_comp_obj_heading_.ocn != 0) {
-          assert(_comp_obj_heading_.parent_ocn < _comp_obj_heading_.ocn);
+      assert(_comp_obj_heading_.node.heading_lev_markup <= 7);
+      assert(_comp_obj_heading_.node.ocn >= 0);
+      if (_comp_obj_heading_.node.parent_lev_markup > 0) {
+        assert(_comp_obj_heading_.node.parent_lev_markup < _comp_obj_heading_.node.heading_lev_markup);
+        if (_comp_obj_heading_.node.ocn != 0) {
+          assert(_comp_obj_heading_.node.parent_ocn < _comp_obj_heading_.node.ocn);
         }
       }
-      if (_comp_obj_heading_.heading_lev_markup == 0) {
-        assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_sect_A);
-      } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_sect_B) {
-        assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_sect_A);
-      } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_sect_C) {
-        assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_sect_B);
-      } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_sect_D) {
-        assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_sect_C);
-      } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_text_1) {
-        assert(_comp_obj_heading_.parent_lev_markup <= DocStructMarkupHeading.h_sect_D);
-      } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_text_2) {
-        assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_text_1);
-      } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_text_3) {
-        assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_text_2);
-      } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_text_4) {
-        assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_text_3);
-      } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_text_5) {
+      if (_comp_obj_heading_.node.heading_lev_markup == 0) {
+        assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_sect_A);
+      } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_sect_B) {
+        assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_sect_A);
+      } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_sect_C) {
+        assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_sect_B);
+      } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_sect_D) {
+        assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_sect_C);
+      } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_text_1) {
+        assert(_comp_obj_heading_.node.parent_lev_markup <= DocStructMarkupHeading.h_sect_D);
+      } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_text_2) {
+        assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_text_1);
+      } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_text_3) {
+        assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_text_2);
+      } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_text_4) {
+        assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_text_3);
+      } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_text_5) {
       }
     }
     return _comp_obj_heading_;
@@ -7361,73 +7361,81 @@ template ObjectSetter() {
 #+END_SRC
 
 ** 1. initialize structs                                            :struct:
-*** heading attribute
-
-#+name: meta_structs_init
-#+BEGIN_SRC d
-struct HeadingAttrib {
-  string lev                            = "9";
-  int    heading_lev_markup             = 9;
-  int    heading_lev_collapsed          = 9;
-  int[]  closes_lev_collapsed           = [];
-  int[]  closes_lev_markup              = [];
-  int    array_ptr                      = 0;
-  int    heading_array_ptr_segments     = 0;
-}
-#+END_SRC
-
 *** [#A] _composite object_
 
 #+name: meta_structs_init
 #+BEGIN_SRC d
-struct ObjGenericComposite {
-  // size_t id;
-  string                 of_part                            = "";
-  string                 of_section                         = "";
-  string                 is_of                              = "";
-  string                 is_a                               = "";
-  string                 text                               = "";
-  string                 obj_cite_number                    = "";
-  string                 obj_cite_number_off                = "";
-  string                 obj_cite_number_bkidx              = "";
-  int                    obj_cite_number_type               = 0;
-  string[]               anchor_tags                        = [];
+struct DocObj_TypeInfo_ {
+  string                 of_part                            = ""; // frontmatter, body, backmatter
+  string                 of_section                         = ""; // toc, body, glossary, biography, book index, blurb
+  string                 is_of                              = ""; // para, block ?
+  string                 is_a                               = ""; // heading, para, table, code block, group, ...
+}
+struct DocObj_TxtAttrib_ {
   int                    indent_base                        = 0;
   int                    indent_hang                        = 0;
   bool                   bullet                             = false;
+  string                 language                           = ""; // not implemented, consider
+}
+struct DocObj_Has_ {
   bool                   inline_links                       = false;
   bool                   inline_notes_reg                   = false;
   bool                   inline_notes_star                  = false;
   bool                   contains_image_without_dimensions  = false;
-  string                 language                           = ""; // not implemented, consider
-  string                 code_block_syntax                  = "";
-  int                    table_number_of_columns            = 0;
-  double[]               table_column_widths                = [];
-  string[]               table_column_aligns                = [];
-  bool                   table_heading                      = false;
-  bool                   table_walls                        = false; // not implemented
-  int                    ocn                                = 0;
-  string                 segment_anchor_tag                 = "";
-  string                 segname_prev                       = "";
-  string                 segname_next                       = "";
-  int                    parent_lev_markup                  = 0;
-  int                    parent_ocn                         = 0;
-  int[]                  ancestors                          = [];
+}
+struct DocObj_Node_ {
+  string[string][string] node;
+  int                    ocn                                = 0; // duplicated as string with obj_cite_number
+  string                 obj_cite_number                    = ""; // duplicated as int with ocn may apply additional info for backmatter (glossary, biblio etc.)
   string                 marked_up_level                    = "9";
   int                    heading_lev_markup                 = 9;
   int                    heading_lev_collapsed              = 9;
   int[]                  dom_markedup                       = [ 0, 0, 0, 0, 0, 0, 0, 0,];
   int[]                  dom_collapsed                      = [ 0, 0, 0, 0, 0, 0, 0, 0,];
   int[]                  heading_ancestors                  = [ 0, 0, 0, 0, 0, 0, 0, 0,];
+  int                    parent_lev_markup                  = 0;
+  int                    parent_ocn                         = 0;
+  int[]                  ancestors                          = [];
+}
+struct DocObj_Table_ {
+  int                    number_of_columns                  = 0;
+  double[]               column_widths                      = [];
+  string[]               column_aligns                      = [];
+  bool                   heading                            = false;
+  bool                   walls                              = false; // not implemented
+}
+struct DocObj_CodeBlock_ {
+  string                 syntax                             = "";
+}
+struct DocObj_Pointer_ {
+  int                    doc_object                         = 0;
+  int                    html_segnames                      = 0;
+  int                    heading                            = 0;
+}
+struct DocObj_Tags_ {
   string[]               heading_ancestors_text             = [ "", "", "", "", "", "", "", "", ];
+  string                 segment_anchor_tag                 = "";
+  string                 segname_prev                       = "";
+  string                 segname_next                       = "";
   string[]               lev4_subtoc                        = [];
-  int                    heading_array_ptr                  = 0;
-  int                    ptr_doc_object                     = 0;
-  int                    ptr_html_segnames                  = 0;
-  int                    ptr_heading                        = 0;
-  int                    array_ptr                          = 0;
-  int                    heading_array_ptr_segments         = 0;
-  string[string][string] node;
+  string[]               anchor_tags                        = [];
+}
+struct DocObj_Misc_ {
+  string                 obj_cite_number_bkidx              = "";
+  string                 obj_cite_number_off                = "";
+  int                    obj_cite_number_type               = 0; // { ocn, non, bkidx }
+}
+struct ObjGenericComposite {
+  string                 text                               = "";
+  DocObj_TypeInfo_       typeinfo;
+  DocObj_TxtAttrib_      attrib;
+  DocObj_Tags_           tags;
+  DocObj_Has_            has;
+  DocObj_Table_          table;
+  DocObj_CodeBlock_      code_block;
+  DocObj_Misc_           misc;
+  DocObj_Pointer_        ptr;
+  DocObj_Node_           node;
 }
 #+END_SRC
 
diff --git a/org/meta_debugs.org b/org/meta_debugs.org
index e624181..5af5cc4 100644
--- a/org/meta_debugs.org
+++ b/org/meta_debugs.org
@@ -89,8 +89,8 @@ debug(parent) {
   );
   foreach (key; doc_matters.xml.keys_seq.seg) {
     foreach (obj; contents[key]) {
-      if (obj.of_part != "empty") {
-        if (obj.is_a == "heading") {
+      if (obj.typeinfo.of_part != "empty") {
+        if (obj.typeinfo.is_a == "heading") {
           writefln(
             "%s node: %s heading: %s %s",
             obj.obj_cite_number,
@@ -117,11 +117,11 @@ debug(dumpdoc) {
   );
   if (key.length > 0) {
     foreach (obj; contents[key]) {
-      if (obj.of_part != "empty") {
+      if (obj.typeinfo.of_part != "empty") {
         writefln(
           "[%s][%s]\n%s",
           obj.obj_cite_number,
-          obj.is_a,
+          obj.typeinfo.is_a,
           obj.text
         );
       }
@@ -190,7 +190,7 @@ debug(checkdoc) {
       foreach (obj; contents[key]) {
         writefln(
           "[%s]\n%s",
-          obj.is_a,
+          obj.typeinfo.is_a,
           obj.text
         );
       }
@@ -213,7 +213,7 @@ debug(checkdoc) {
         writefln(
           "[%s][%s]\n%s",
           obj.obj_cite_number,
-          obj.is_a,
+          obj.typeinfo.is_a,
           obj.text
         );
       }
@@ -234,7 +234,7 @@ debug(section_head) {
       writefln(
         "[%s][%s]\n%s",
         obj.obj_cite_number,
-        obj.is_a,
+        obj.typeinfo.is_a,
         obj.text
       );
     }
@@ -292,7 +292,7 @@ debug(section_body) {
       writefln(
         "[%s][%s]\n%s",
         obj.obj_cite_number,
-        obj.is_a,
+        obj.typeinfo.is_a,
         obj.text
       );
     }
@@ -308,7 +308,7 @@ debug(toc_nav_dom) {
   enum DomTags { none, open, close, close_and_open, open_still, }
   foreach (sect; doc_matters.xml.keys_seq.seg) {
     foreach (obj; contents[sect]) {
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         foreach_reverse (k; 0 .. 7) {
           switch (obj.dom_markedup[k]) {
           case DomTags.close :
@@ -335,7 +335,7 @@ debug(toc_nav_dom) {
   writeln("--------------------");
   foreach (sect; doc_matters.xml.keys_seq.seg) {
     foreach (obj; contents[sect]) {
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         foreach_reverse (k; 0 .. 7) {
           switch (obj.dom_collapsed[k]) {
           case DomTags.close :
@@ -394,7 +394,7 @@ debug(section_glossary) {
       writefln(
         "[%s][%s]\n%s",
         obj.obj_cite_number,
-        obj.is_a,
+        obj.typeinfo.is_a,
         obj.text
       );
     }
@@ -413,7 +413,7 @@ debug(section_bibliography) {
       writefln(
         "[%s][%s]\n%s",
         obj.obj_cite_number,
-        obj.is_a,
+        obj.typeinfo.is_a,
         obj.text
       );
     }
@@ -463,7 +463,7 @@ debug(blurb_section) {
       writefln(
         "[%s][%s]\n%s",
         obj.obj_cite_number,
-        obj.is_a,
+        obj.typeinfo.is_a,
         obj.text
       );
     }
@@ -482,11 +482,11 @@ debug(objects) {
     __LINE__,
   );
   foreach (obj; contents[key]) {
-    if (obj.of_part != "empty") {
+    if (obj.typeinfo.of_part != "empty") {
       writefln(
         "* [%s][%s] %s",
         obj.obj_cite_number,
-        obj.is_a,
+        obj.typeinfo.is_a,
         obj.text
       );
     }
@@ -666,7 +666,7 @@ debug(anchor) {
   );
   foreach (k; doc_matters.xml.keys_seq.seg) {
     foreach (obj; contents[k]) {
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         writefln(
           "%s~ [%s] %s %s",
           obj.marked_up_level,
@@ -688,7 +688,7 @@ debug(anchor) {
 debug(heading) {                         // heading
   foreach (k; doc_matters.xml.keys_seq.seg) {
     foreach (o; contents[k]) {
-      if (o.is_a == "heading") {
+      if (o.typeinfo.is_a == "heading") {
         writefln(
           "%s* %s\n                (markup level: %s; collapsed level: %s)",
           replicate("  ", o.heading_lev_markup),
@@ -714,7 +714,7 @@ debug(headings) {
   );
   foreach (k; doc_matters.xml.keys_seq.seg) {
     foreach (obj; contents[k]) {
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         writefln(
           "%s~ [%s] %s",
           obj.marked_up_level,
diff --git a/org/output_sqlite.org b/org/output_sqlite.org
index c7b6571..8348870 100644
--- a/org/output_sqlite.org
+++ b/org/output_sqlite.org
@@ -446,7 +446,7 @@ auto html_heading(O)(
   string o = format(q"¶<p class="%s"><b>
       %s
     </b></p>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt,
     );
   return o;
@@ -465,10 +465,10 @@ auto html_heading(O)(
   o = format(q"¶<h%s class="%s">
       %s
     </h%s>¶",
-      obj.heading_lev_markup,
-      obj.is_a,
+      obj.node.heading_lev_markup,
+      obj.typeinfo.is_a,
       _txt,
-      obj.heading_lev_markup,
+      obj.node.heading_lev_markup,
     );
   return o;
 }
@@ -482,13 +482,13 @@ auto html_para(O)(
   auto return ref const O    obj,
 ) {
   string _txt = munge_html(obj);
-  _txt = (obj.bullet) ? ("●&#160;&#160;" ~ _txt) : _txt;
+  _txt = (obj.attrib.bullet) ? ("●&#160;&#160;" ~ _txt) : _txt;
   string o = format(q"¶<p class="%s" indent="h%si%s">
     %s
   </p>¶",
-      obj.is_a,
-      obj.indent_hang,
-      obj.indent_base,
+      obj.typeinfo.is_a,
+      obj.attrib.indent_hang,
+      obj.attrib.indent_base,
       _txt
     );
   return o;
@@ -506,7 +506,7 @@ auto html_quote(O)(
   string o = format(q"¶<p class="%s">
     %s
   </p>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt
     );
   return o;
@@ -524,7 +524,7 @@ auto html_group(O)(
   string o = format(q"¶<p class="%s">
     %s
   </p>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt
     );
   return o;
@@ -541,7 +541,7 @@ auto html_block(O)(
   string _txt = munge_html(obj);
   string o = format(q"¶
   <p class="%s">%s</p>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt.stripRight
     );
   return o;
@@ -557,7 +557,7 @@ auto html_verse(O)(
 ) {
   string _txt = munge_html(obj);
   string o = format(q"¶<p class="%s">%s</p>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt
     );
   return o;
@@ -573,7 +573,7 @@ auto html_code(O)(
 ) {
   string _txt = html_special_characters_code(obj.text);
   string o = format(q"¶<p class="%s">%s</p>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt
     );
   return o;
@@ -603,14 +603,14 @@ auto html_table(O)(
           && (_table_rows.length <= row_idx+2)) { // check row_idx+2 (rather than == ++row_idx)
             _tablenote ~= cell;
           } else {
-            string _col_is = (row_idx == 0 && obj.table_heading) ? "th" : "td";
+            string _col_is = (row_idx == 0 && obj.table.heading) ? "th" : "td";
             string _align = ("style=\"text-align:"
-            ~ ((obj.table_column_aligns[col_idx] == "l")
+            ~ ((obj.table.column_aligns[col_idx] == "l")
             ? "left\"" : "right\""));
             _table ~= "<"
               ~ _col_is
               ~ " width=\""
-              ~ obj.table_column_widths[col_idx].to!string
+              ~ obj.table.column_widths[col_idx].to!string
               ~ "%\" "
               ~ _align
               ~ ">";
@@ -638,7 +638,7 @@ auto html_table(O)(
     </table>
     %s
   </p>¶",
-    obj.is_a,
+    obj.typeinfo.is_a,
     _txt,
     _note
   );
@@ -925,7 +925,7 @@ auto table(O)(
 }
 #+END_SRC
 
-** 4. loop, identify, load - loop template
+** 4. ↻ loop, identify, load - loop template
 
 #+name: sqlite_objects_loop
 #+BEGIN_SRC d
@@ -935,32 +935,32 @@ string doc_text;
 string[] _insert_doc_objects;
 foreach (part; doc_matters.xml.keys_seq.sql) {
   foreach (obj; doc_abstraction[part]) {
-    switch (obj.of_part) {
+    switch (obj.typeinfo.of_part) {
     case "frontmatter":              assert(part == "head", part);
-      switch (obj.is_of) {
+      switch (obj.typeinfo.is_of) {
       case "para":
-        switch (obj.is_a) {
+        switch (obj.typeinfo.is_a) {
         case "heading":
           obj_txt = format_and_sqlite_load.heading(obj);
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
           }
           break;
         }
         break;
       default:
         if ((doc_matters.opt.action.debug_do)) {
-          writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+          writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
         }
         break;
       }
       break;
     case "body": //                    assert(part == "body", part); // TODO broken
-      switch (obj.is_of) {
+      switch (obj.typeinfo.is_of) {
       case "para":
-        switch (obj.is_a) {
+        switch (obj.typeinfo.is_a) {
         case "heading":
           debug (asserts) { // TODO consider and fix or remove
             if (part != "body") {
@@ -974,13 +974,13 @@ foreach (part; doc_matters.xml.keys_seq.sql) {
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
           }
           break;
         }
         break;
       case "block":
-        switch (obj.is_a) {
+        switch (obj.typeinfo.is_a) {
         case "quote":
           obj_txt = format_and_sqlite_load.quote(obj);
           break;
@@ -1003,23 +1003,23 @@ foreach (part; doc_matters.xml.keys_seq.sql) {
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
           }
           break;
         }
         break;
       default:
         if ((doc_matters.opt.action.debug_do)) {
-          writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+          writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
         }
         break;
       }
       break;
     case "backmatter":
       assert(part == "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail", part);
-      switch (obj.is_of) {
+      switch (obj.typeinfo.is_of) {
       case "para":
-        switch (obj.is_a) {
+        switch (obj.typeinfo.is_a) {
         case "heading":
           obj_txt = format_and_sqlite_load.heading(obj);
           break;
@@ -1037,14 +1037,14 @@ foreach (part; doc_matters.xml.keys_seq.sql) {
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
           }
           break;
         }
         break;
       default:
         if ((doc_matters.opt.action.debug_do)) {
-          writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+          writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
         }
         break;
       }
@@ -1053,28 +1053,28 @@ foreach (part; doc_matters.xml.keys_seq.sql) {
       break;
     default:
       if ((doc_matters.opt.action.debug_do)) {
-        writeln(__FILE__, ":", __LINE__, ": ", obj.of_part); // check where empty value could come from
-        writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+        writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.of_part); // check where empty value could come from
+        writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
         writeln(__FILE__, ":", __LINE__, ": ", obj.text); // check where empty value could come from
       }
       break;
     }
-    if (obj.is_a == "heading") {
+    if (obj.typeinfo.is_a == "heading") {
       if ((doc_matters.opt.action.verbose)) {
         writeln(
-          "markup: ", obj.heading_lev_markup,
-          "> ", obj.dom_markedup,
-          "; collapsed: ", obj.heading_lev_collapsed,
-          "> ", obj.dom_collapsed,
-          "; ocn: ", obj.ocn,
-          " node: ", obj.node,
-          "; parent: ", obj.parent_lev_markup,
-          "; ocn: ", obj.parent_ocn,
+          "markup: ", obj.node.heading_lev_markup,
+          "> ", obj.node.dom_markedup,
+          "; collapsed: ", obj.node.heading_lev_collapsed,
+          "> ", obj.node.dom_collapsed,
+          "; ocn: ", obj.node.ocn,
+          " node: ", obj.node.node,
+          "; parent: ", obj.node.parent_lev_markup,
+          "; ocn: ", obj.node.parent_ocn,
           "; ",
         );
       }
     }
-    if (!(obj.is_a == "comment")) {
+    if (!(obj.typeinfo.is_a == "comment")) {
       _insert_doc_objects ~= insertDocObjectsRow(obj);
     }
   } // loop closes
@@ -1302,12 +1302,12 @@ _insert_doc_objects_row = format(q"¶
 #+BEGIN_SRC d
 ¶",
   _metadata_tid,
-  obj.ocn,
+  obj.node.ocn,
   SQLinsertDelimiter!()(obj_txt["text"]),
   SQLinsertDelimiter!()(obj_txt["html"]),
-  obj.heading_lev_markup,
-  obj.is_of,
-  obj.is_a,
+  obj.node.heading_lev_markup,
+  obj.typeinfo.is_of,
+  obj.typeinfo.is_a,
 );
 #+END_SRC
 
diff --git a/org/output_xmls.org b/org/output_xmls.org
index 7b86093..eb0e263 100644
--- a/org/output_xmls.org
+++ b/org/output_xmls.org
@@ -107,7 +107,7 @@ string special_characters(O)(
     .replaceAll(rgx.xhtml_less_than,    "&#60;")
     .replaceAll(rgx.xhtml_greater_than, "&#62;")
     .replaceAll(rgx.nbsp_char,          " ");
-  if (!(obj.is_a == "code")) {
+  if (!(obj.typeinfo.is_a == "code")) {
     _txt = (_txt)
       .replaceAll(rgx.xhtml_line_break,   "<br />");
   }
@@ -455,7 +455,7 @@ auto inline_links(O)(
   string                  _suffix    = ".html",
   string                  _xml_type = "seg",
 ) {
-  if (obj.inline_links) {
+  if (obj.has.inline_links) {
     if ((_txt.match(rgx.mark_internal_site_lnk))
     && (_xml_type == "scroll")) { // conditions reversed to avoid: gdc compiled program run segfault
       _txt = (_txt).replaceAll(
@@ -477,8 +477,8 @@ auto inline_links(O)(
     if (_txt.match(rgx.inline_link)) {
       writeln(__LINE__,
         " (missed) markup link identified (",
-        obj.inline_links,
-        "): ", obj.is_a, ": ",
+        obj.has.inline_links,
+        "): ", obj.typeinfo.is_a, ": ",
         obj.text
       );
     }
@@ -487,8 +487,8 @@ auto inline_links(O)(
     if (_txt.match(rgx.inline_link)) {
       writeln(__LINE__,
         " (missed) markup link identified (",
-        obj.inline_links,
-        "): ", obj.is_a, ": ",
+        obj.has.inline_links,
+        "): ", obj.typeinfo.is_a, ": ",
         obj.text
       );
     }
@@ -505,7 +505,7 @@ auto inline_notes_scroll(O)(
   auto return ref const O   obj,
   string                    _txt,
 ) {
-  if (obj.inline_notes_reg) {
+  if (obj.has.inline_notes_reg) {
     _txt = font_face(_txt);
     _txt = (_txt).replaceAll(
       rgx.inline_notes_delimiter_al_regular_number_note,
@@ -514,12 +514,12 @@ auto inline_notes_scroll(O)(
   }
   debug(markup_endnotes) {
     if (_txt.match(rgx.inline_notes_delimiter_al_regular_number_note)) {
-      writeln(__LINE__, " (missed) markup endnote: ", obj.is_a, ": ", obj.text);
+      writeln(__LINE__, " (missed) markup endnote: ", obj.typeinfo.is_a, ": ", obj.text);
     }
   }
   debug(markup) {
     if (_txt.match(rgx.inline_notes_delimiter_al_regular_number_note)) {
-      writeln(__LINE__, " (missed) markup endnote: ", obj.is_a, ": ", obj.text);
+      writeln(__LINE__, " (missed) markup endnote: ", obj.typeinfo.is_a, ": ", obj.text);
     }
   }
   return _txt;
@@ -535,7 +535,7 @@ auto inline_notes_seg(O)(
   string                      _txt,
 ) {
   string[] _endnotes;
-  if (obj.inline_notes_reg) {
+  if (obj.has.inline_notes_reg) {
     _txt = font_face(_txt);
     /+ need markup for text, and separated footnote +/
     foreach(m; _txt.matchAll(rgx.inline_notes_delimiter_al_regular_number_note)) {
@@ -560,7 +560,7 @@ auto inline_notes_seg(O)(
     );
   } else if (_txt.match(rgx.inline_notes_delimiter_al_regular_number_note)) {
     debug(markup) {
-      writeln(__LINE__, " endnote: ", obj.is_a, ": ", obj.text);
+      writeln(__LINE__, " endnote: ", obj.typeinfo.is_a, ": ", obj.text);
     }
   }
   auto t = tuple(
@@ -614,7 +614,7 @@ string lev4_heading_subtoc(O)(
 ) {
   char[] lev4_subtoc;
   lev4_subtoc ~= "  <div class=\"nav\">\n";
-  foreach (subtoc; obj.lev4_subtoc) {
+  foreach (subtoc; obj.tags.lev4_subtoc) {
     if (auto m = subtoc.match(rgx.inline_link_subtoc)) {
       auto indent = m.captures[1].to!string;
       auto text = m.captures[2].to!string;
@@ -645,7 +645,7 @@ auto nav_pre_next_svg(O)(
   auto return ref const O    obj,
 ) {
   string prev, next, toc;
-  if (obj.segment_anchor_tag == "toc") {
+  if (obj.tags.segment_anchor_tag == "toc") {
     toc = "";
     prev = "";
   } else {
@@ -658,7 +658,7 @@ auto nav_pre_next_svg(O)(
         </a>¶",
     );
   }
-  if (obj.segname_prev == "") {
+  if (obj.tags.segname_prev == "") {
     prev = "";
   } else {
     prev = format(q"¶<a href="%s.html" target="_top">
@@ -668,10 +668,10 @@ auto nav_pre_next_svg(O)(
             </svg>
           </div>
         </a>¶",
-      obj.segname_prev,
+      obj.tags.segname_prev,
     );
   }
-  if (obj.segname_next == "") {
+  if (obj.tags.segname_next == "") {
     next = "";
   } else {
     next = format(q"¶<a href="%s.html" target="_top">
@@ -681,7 +681,7 @@ auto nav_pre_next_svg(O)(
             </svg>
           </div>
         </a>¶",
-      obj.segname_next,
+      obj.tags.segname_next,
     );
   }
   string _toc_pre_next = format(q"¶        <div class="flex-menu-option">
@@ -730,15 +730,15 @@ auto heading(O)(
   string                     _txt,
   string                     _xml_type = "html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   string _horizontal_rule = "<hr />";
   if ((_xml_type != "html")
-  || (obj.heading_lev_markup == 0 || obj.heading_lev_markup > 4)) {
+  || (obj.node.heading_lev_markup == 0 || obj.node.heading_lev_markup > 4)) {
     _horizontal_rule = "";
   }
   _txt = font_face(_txt);
   string o;
-  if (obj.obj_cite_number.empty) {
+  if (obj.node.obj_cite_number.empty) {
     o = format(q"¶%s
   <div class="substance">
     <h%s class="%s">%s
@@ -746,11 +746,11 @@ auto heading(O)(
     </h%s>
   </div>¶",
       _horizontal_rule,
-      obj.heading_lev_markup,
-      obj.is_a,
+      obj.node.heading_lev_markup,
+      obj.typeinfo.is_a,
       tags,
       _txt,
-      obj.heading_lev_markup,
+      obj.node.heading_lev_markup,
     );
   } else {
     o = format(q"¶%s
@@ -761,15 +761,15 @@ auto heading(O)(
     </h%s>
   </div>¶",
     _horizontal_rule,
-    obj.obj_cite_number,
-    obj.obj_cite_number,
-    obj.heading_lev_markup,
-    obj.is_a,
-    obj.obj_cite_number,
-    obj.obj_cite_number,
+    obj.node.obj_cite_number,
+    obj.node.obj_cite_number,
+    obj.node.heading_lev_markup,
+    obj.typeinfo.is_a,
+    obj.node.obj_cite_number,
+    obj.node.obj_cite_number,
     tags,
     _txt,
-    obj.heading_lev_markup,
+    obj.node.heading_lev_markup,
     );
   }
   return o;
@@ -785,7 +785,7 @@ auto heading_scroll(O)(
   string                     _txt,
   string                     _suffix = ".html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = inline_markup_scroll(obj, _txt, _suffix);
   string o = heading(obj, _txt);
   return o;
@@ -823,19 +823,19 @@ auto para(O)(
   auto return ref const O    obj,
   string                     _txt,
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = font_face(_txt);
   string o;
-  _txt = (obj.bullet) ? ("●&#160;&#160;" ~ _txt) : _txt;
-  if (obj.obj_cite_number.empty) {
+  _txt = (obj.attrib.bullet) ? ("●&#160;&#160;" ~ _txt) : _txt;
+  if (obj.node.obj_cite_number.empty) {
     o = format(q"¶  <div class="substance">
   <p class="%s" indent="h%si%s">%s
     %s
   </p>
 </div>¶",
-      obj.is_a,
-      obj.indent_hang,
-      obj.indent_base,
+      obj.typeinfo.is_a,
+      obj.attrib.indent_hang,
+      obj.attrib.indent_base,
       tags,
       _txt
     );
@@ -846,12 +846,12 @@ auto para(O)(
     %s
   </p>
 </div>¶",
-      obj.obj_cite_number,
-      obj.obj_cite_number,
-      obj.is_a,
-      obj.indent_hang,
-      obj.indent_base,
-      obj.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.typeinfo.is_a,
+      obj.attrib.indent_hang,
+      obj.attrib.indent_base,
+      obj.node.obj_cite_number,
       tags,
       _txt
     );
@@ -869,7 +869,7 @@ auto para_scroll(O)(
   string                     _txt,
   string                     _suffix = ".html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = inline_markup_scroll(obj, _txt, _suffix);
   string o = para(obj, _txt);
   return o;
@@ -909,13 +909,13 @@ auto quote(O)(
 ) {
   _txt = font_face(_txt);
   string o;
-  if (obj.obj_cite_number.empty) {
+  if (obj.node.obj_cite_number.empty) {
     o = format(q"¶  <div class="substance">
   <p class="%s">
     %s
   </p>
 </div>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt
     );
   } else {
@@ -925,10 +925,10 @@ auto quote(O)(
     %s
   </p>
 </div>¶",
-      obj.obj_cite_number,
-      obj.obj_cite_number,
-      obj.is_a,
-      obj.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.typeinfo.is_a,
+      obj.node.obj_cite_number,
       _txt
     );
   }
@@ -945,7 +945,7 @@ auto quote_scroll(O)(
   string                     _txt,
   string                     _suffix = ".html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = inline_markup_scroll(obj, _txt, _suffix);
   string o = quote(obj, _txt);
   return o;
@@ -985,13 +985,13 @@ auto group(O)(
 ) {
   _txt = font_face(_txt);
   string o;
-  if (obj.obj_cite_number.empty) {
+  if (obj.node.obj_cite_number.empty) {
     o = format(q"¶  <div class="substance">
   <p class="%s">
     %s
   </p>
 </div>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt
     );
   } else {
@@ -1001,10 +1001,10 @@ auto group(O)(
     %s
   </p>
 </div>¶",
-      obj.obj_cite_number,
-      obj.obj_cite_number,
-      obj.is_a,
-      obj.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.typeinfo.is_a,
+      obj.node.obj_cite_number,
       _txt
     );
   }
@@ -1022,7 +1022,7 @@ auto group_scroll(O)(
   string                     _suffix = ".html",
   string                     _xml_type = "html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = inline_markup_scroll(obj, _txt, _suffix);
   string o = group(obj, _txt);
   return o;
@@ -1062,11 +1062,11 @@ auto block(O)(
 ) {
   _txt = font_face(_txt);
   string o;
-  if (obj.obj_cite_number.empty) {
+  if (obj.node.obj_cite_number.empty) {
     o = format(q"¶  <div class="substance">
   <p class="%s">%s</p>
 </div>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt.stripRight
     );
   } else {
@@ -1074,10 +1074,10 @@ auto block(O)(
   <label class="ocn"><a href="#%s" class="lnkocn">%s</a></label>
   <p class="%s" id="%s">%s</p>
 </div>¶",
-      obj.obj_cite_number,
-      obj.obj_cite_number,
-      obj.is_a,
-      obj.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.typeinfo.is_a,
+      obj.node.obj_cite_number,
       _txt.stripRight
     );
   }
@@ -1095,7 +1095,7 @@ auto block_scroll(O)(
   string                     _suffix = ".html",
   string                     _xml_type = "html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = inline_markup_scroll(obj, _txt, _suffix);
   string o = block(obj, _txt);
   return o;
@@ -1135,11 +1135,11 @@ auto verse(O)(
 ) {
   _txt = font_face(_txt);
   string o;
-  if (obj.obj_cite_number.empty) {
+  if (obj.node.obj_cite_number.empty) {
       o = format(q"¶  <div class="substance">
         <p class="%s">%s</p>
     </div>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt
     );
   } else {
@@ -1147,10 +1147,10 @@ auto verse(O)(
       <label class="ocn"><a href="#%s" class="lnkocn">%s</a></label>
       <p class="%s" id="%s">%s</p>
     </div>¶",
-      obj.obj_cite_number,
-      obj.obj_cite_number,
-      obj.is_a,
-      obj.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.typeinfo.is_a,
+      obj.node.obj_cite_number,
       _txt
     );
   }
@@ -1168,7 +1168,7 @@ auto verse_scroll(O)(
   string                     _suffix = ".html",
   string                     _xml_type = "html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = inline_markup_scroll(obj, _txt, _suffix);
   string o = verse(obj, _txt);
   return o;
@@ -1206,11 +1206,11 @@ auto code(O)(
   string                   _txt,
 ) {
   string o;
-  if (obj.obj_cite_number.empty) {
+  if (obj.node.obj_cite_number.empty) {
       o = format(q"¶  <div class="substance">
     <p class="%s">%s</p>
 </div>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt
     );
   } else {
@@ -1218,10 +1218,10 @@ auto code(O)(
   <label class="ocn"><a href="#%s" class="lnkocn">%s</a></label>
   <p class="%s" id="%s">%s</p>
 </div>¶",
-      obj.obj_cite_number,
-      obj.obj_cite_number,
-      obj.is_a,
-      obj.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.typeinfo.is_a,
+      obj.node.obj_cite_number,
       _txt
     );
   }
@@ -1258,11 +1258,11 @@ auto tablarize(O)(
         && (_table_rows.length <= row_idx+2)) {
           _tablenote ~= cell;
         } else {
-          string _col_is = (row_idx == 0 && obj.table_heading) ? "th" : "td";
+          string _col_is = (row_idx == 0 && obj.table.heading) ? "th" : "td";
           string _align = ("style=\"text-align:"
-          ~ ((obj.table_column_aligns[col_idx] == "l")
+          ~ ((obj.table.column_aligns[col_idx] == "l")
           ? "left\"" : "right\""));
-          _table ~= "<" ~ _col_is ~ " width=\"" ~ obj.table_column_widths[col_idx].to!string ~ "%\" " ~ _align ~ ">";
+          _table ~= "<" ~ _col_is ~ " width=\"" ~ obj.table.column_widths[col_idx].to!string ~ "%\" " ~ _align ~ ">";
           _table ~= cell;
           _table ~= "</" ~ _col_is ~ ">";
         }
@@ -1285,7 +1285,7 @@ auto table(O)(
   auto return ref const O    obj,
   string                     _txt,
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = font_face(_txt);
   auto t = tablarize(obj, _txt);
   _txt = t[0];
@@ -1300,10 +1300,10 @@ auto table(O)(
     %s
   </p>
 </div>¶",
-    obj.obj_cite_number,
-    obj.obj_cite_number,
-    obj.is_a,
-    obj.obj_cite_number,
+    obj.node.obj_cite_number,
+    obj.node.obj_cite_number,
+    obj.typeinfo.is_a,
+    obj.node.obj_cite_number,
     tags,
     _txt,
     _note
@@ -1324,9 +1324,9 @@ auto endnote(O)(
   o = format(q"¶    <p class="%s" indent="h%si%s">
   %s
 </p>¶",
-    obj.is_a,
-    obj.indent_hang,
-    obj.indent_base,
+    obj.typeinfo.is_a,
+    obj.attrib.indent_hang,
+    obj.attrib.indent_base,
     _txt
   );
   return o;
@@ -1349,7 +1349,7 @@ template outputHTML() {
 #+END_SRC
 
 ** scroll                                                           :scroll:
-*** switch (sections & objects) format html output
+*** ↻ loop & switch (sections & objects) format html output
 
 #+name: output_html_scroll
 #+BEGIN_SRC d
@@ -1369,11 +1369,11 @@ void scroll(D,I)(
     foreach (obj; doc_abstraction[part]) {
       delimit = xhtml_format.div_delimit(part, previous_part);
       string _txt = xhtml_format.special_characters(obj, obj.text);
-      switch (obj.of_part) {
+      switch (obj.typeinfo.of_part) {
       case "frontmatter":              assert(part == "head" || "toc_scroll");
-        switch (obj.is_of) {
+        switch (obj.typeinfo.is_of) {
         case "para":
-          switch (obj.is_a) {
+          switch (obj.typeinfo.is_a) {
           case "heading":
             doc_html ~= delimit ~ xhtml_format.heading_scroll(obj, _txt, suffix);
             break;
@@ -1382,22 +1382,22 @@ void scroll(D,I)(
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
             }
             break;
           }
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
           }
           break;
         }
         break;
       case "body":                     assert(part == "body" || "head"); // surprise
-        switch (obj.is_of) {
+        switch (obj.typeinfo.is_of) {
         case "para":
-          switch (obj.is_a) {
+          switch (obj.typeinfo.is_a) {
           case "heading":
             doc_html ~= delimit ~ xhtml_format.heading_scroll(obj, _txt, suffix);
             break;
@@ -1406,13 +1406,13 @@ void scroll(D,I)(
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
             }
             break;
           }
           break;
         case "block":
-          switch (obj.is_a) {
+          switch (obj.typeinfo.is_a) {
           case "quote":
             doc_html ~= xhtml_format.quote_scroll(obj, _txt);
             break;
@@ -1435,23 +1435,23 @@ void scroll(D,I)(
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
             }
             break;
           }
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
           }
           break;
         }
         break;
       case "backmatter":
         assert(part == "endnotes" || "glossary" || "bibliography" || "bookindex_scroll" || "blurb" || "tail");
-        switch (obj.is_of) {
+        switch (obj.typeinfo.is_of) {
         case "para":
-          switch (obj.is_a) {
+          switch (obj.typeinfo.is_a) {
           case "heading":
             doc_html ~= delimit ~ xhtml_format.heading_scroll(obj, _txt, suffix);
             break;
@@ -1472,14 +1472,14 @@ void scroll(D,I)(
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
             }
             break;
           }
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
           }
           break;
         }
@@ -1488,8 +1488,8 @@ void scroll(D,I)(
         break;
       default:
         if ((doc_matters.opt.action.debug_do)) {
-          writeln(__FILE__, ":", __LINE__, ": ", obj.of_part);
-          writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+          writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.of_part);
+          writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
           writeln(__FILE__, ":", __LINE__, ": ", obj.text);
         }
         break;
@@ -1530,7 +1530,7 @@ void scroll_write_output(M,C)(
 #+END_SRC
 
 ** seg                                                                 :seg:
-*** switch (sections & objects) format html output
+*** ↻ loop & switch (sections & objects) format html output
 
 #+name: output_html_seg
 #+BEGIN_SRC d
@@ -1554,12 +1554,12 @@ void seg(D,M)(
     foreach (obj; doc_abstraction[part]) {
       delimit = xhtml_format.div_delimit(part, previous_part);
       string _txt = xhtml_format.special_characters(obj, obj.text);
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         assert(part == "head" || "toc_seg" || "body" || "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-        switch (obj.heading_lev_markup) {
+        switch (obj.node.heading_lev_markup) {
         case 0: .. case 3:
           /+ fill buffer, and replace with new levels from 1 to 3 +/
-          switch (obj.heading_lev_markup) {
+          switch (obj.node.heading_lev_markup) {
           case 0:
             top_level_headings[0] = "";
             top_level_headings[1] = "";
@@ -1580,12 +1580,12 @@ void seg(D,M)(
             goto default;
           default:
             auto t = xhtml_format.heading_seg(obj, _txt, suffix, "seg");
-            top_level_headings[obj.heading_lev_markup] = t[0];
+            top_level_headings[obj.node.heading_lev_markup] = t[0];
             break;
           }
           break;
         case 4:
-          segment_filename = obj.segment_anchor_tag;
+          segment_filename = obj.tags.segment_anchor_tag;
           doc_html[segment_filename] ~= xhtml_format.html_head(doc_matters, "seg");
           auto navigation_bar = xhtml_format.nav_pre_next_svg(obj);
           doc_html[segment_filename] ~= navigation_bar.toc_pre_next; // navigation bar
@@ -1606,45 +1606,45 @@ void seg(D,M)(
           break;
         case 8: .. case 9:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a, ": ", obj.heading_lev_markup);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a, ": ", obj.node.heading_lev_markup);
             writeln(__FILE__, ":", __LINE__, ": ", obj.text);
           }
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a, ": ", obj.heading_lev_markup);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a, ": ", obj.node.heading_lev_markup);
           }
           break;
         }
       } else {
         assert(part == "head" || "toc_seg" || "body" || "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-        switch (obj.of_part) {
+        switch (obj.typeinfo.of_part) {
         case "frontmatter":             assert(part == "head" || "toc_seg");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "toc":
               auto t = xhtml_format.para_seg(obj, _txt, suffix, "seg");
               doc_html[segment_filename] ~= t[0].to!string;
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
             }
             break;
           }
           break;
         case "body":                    assert(part == "body");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "para":
               auto t = xhtml_format.para_seg(obj, _txt, suffix, "seg");
               doc_html[segment_filename] ~= t[0].to!string;
@@ -1652,13 +1652,13 @@ void seg(D,M)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           case "block":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "quote":
               auto t = xhtml_format.quote_seg(obj, _txt, suffix, "seg");
               doc_html[segment_filename] ~= t[0].to!string;
@@ -1690,23 +1690,23 @@ void seg(D,M)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
           break;
         case "backmatter":
           assert(part == "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "endnote":             assert(part == "endnotes");
               auto t = xhtml_format.para_seg(obj, _txt, suffix, "seg");
               doc_html[segment_filename] ~= t[0];
@@ -1733,14 +1733,14 @@ void seg(D,M)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
@@ -1749,7 +1749,7 @@ void seg(D,M)(
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.of_part);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.of_part);
           }
           break;
         }
@@ -2004,20 +2004,20 @@ string epub3_oebps_content(D,I,P)(D doc_abstraction, I doc_matters, P parts) {
   debug(epubmanifest) {
     foreach (s; doc_matters.xml.keys_seq.seg) {
       foreach (obj; doc_abstraction[s]) {
-        if (obj.is_a == "heading") {
-          if (obj.heading_lev_markup == 4) {
+        if (obj.typeinfo.is_a == "heading") {
+          if (obj.node.heading_lev_markup == 4) {
             writefln(
               "%s~ [%s.xhtml] %s",
               obj.marked_up_level,
-              obj.segment_anchor_tag,
+              obj.tags.segment_anchor_tag,
               obj.text
             );
-          } else if (obj.heading_lev_markup > 4) {
+          } else if (obj.node.heading_lev_markup > 4) {
             writefln(
               "%s~ [%s.xhtml#%s] %s",
               obj.marked_up_level,
-              obj.segment_anchor_tag,
-              obj.obj_cite_number,
+              obj.tags.segment_anchor_tag,
+              obj.node.obj_cite_number,
               obj.text
             );
           }
@@ -2054,49 +2054,49 @@ string epub3_oebps_toc_nav_xhtml(D,I)(D doc_abstraction, I doc_matters) {
   );
   foreach (sect; doc_matters.xml.keys_seq.seg) {
     foreach (obj; doc_abstraction[sect]) {
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         string _txt = obj.text.replaceAll(rgx.inline_notes_al_gen, "").strip;
         foreach_reverse (n; 0 .. 7) {
           string k = n.to!string;
-          switch (obj.dom_collapsed[n]) {
+          switch (obj.node.dom_collapsed[n]) {
           case DomTags.close :
             toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "</li>" ~ "\n";
             toc ~= markup.indent_by_spaces_provided(n, "  ") ~ "</ol>" ~ "\n";
             break;
           case DomTags.close_and_open :
             toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "</li>" ~ "\n";
-            if  (obj.heading_lev_markup < 4) {
+            if  (obj.node.heading_lev_markup < 4) {
               toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "<li>" ~ "\n"
               ~ markup.indent_by_spaces_provided((n + 2), "  ")
-              ~ "<a href=\"" ~ obj.segment_anchor_tag ~ ".xhtml" ~ "\">"
+              ~ "<a href=\"" ~ obj.tags.segment_anchor_tag ~ ".xhtml" ~ "\">"
               ~ _txt
               ~ "</a>" ~ "\n";
             } else {
-              string hashtag =(obj.heading_lev_markup == 4)
+              string hashtag =(obj.node.heading_lev_markup == 4)
               ? ""
-              : ("#" ~ obj.ocn.to!string);
+              : ("#" ~ obj.node.ocn.to!string);
               toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "<li>" ~ "\n"
               ~ markup.indent_by_spaces_provided((n + 2), "  ")
-              ~ "<a href=\"" ~ obj.segment_anchor_tag ~ ".xhtml" ~ hashtag ~ "\">"
+              ~ "<a href=\"" ~ obj.tags.segment_anchor_tag ~ ".xhtml" ~ hashtag ~ "\">"
               ~ _txt
               ~ "</a>" ~ "\n";
             }
             break;
           case DomTags.open :
             toc ~= markup.indent_by_spaces_provided(n, "  ") ~ "<ol>" ~ "\n";
-            if  (obj.heading_lev_markup < 4) {
+            if  (obj.node.heading_lev_markup < 4) {
               toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "<li>" ~ "\n"
               ~ markup.indent_by_spaces_provided((n + 2), "  ")
-              ~ "<a href=\"" ~ obj.segment_anchor_tag ~ ".xhtml" ~ "\">"
+              ~ "<a href=\"" ~ obj.tags.segment_anchor_tag ~ ".xhtml" ~ "\">"
               ~ _txt
               ~ "</a>" ~ "\n";
             } else {
-              string hashtag =(obj.heading_lev_markup == 4)
+              string hashtag =(obj.node.heading_lev_markup == 4)
               ? ""
-              : ("#" ~ obj.ocn.to!string);
+              : ("#" ~ obj.node.ocn.to!string);
               toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "<li>" ~ "\n"
               ~ markup.indent_by_spaces_provided((n + 2), "  ")
-              ~ "<a href=\"" ~ obj.segment_anchor_tag ~ ".xhtml" ~ hashtag ~ "\">"
+              ~ "<a href=\"" ~ obj.tags.segment_anchor_tag ~ ".xhtml" ~ hashtag ~ "\">"
               ~ _txt
               ~ "</a>" ~ "\n";
             }
@@ -2160,11 +2160,11 @@ string epub2_oebps_toc_ncx(D,I)(D doc_abstraction, I doc_matters) {
   );
   foreach (sect; doc_matters.xml.keys_seq.seg) {
     foreach (obj; doc_abstraction[sect]) {
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         string _txt = obj.text.replaceAll(rgx.inline_notes_al_gen, "").strip;
-        string hashtag =(obj.heading_lev_markup <= 4) ? "" : ("#" ~ obj.ocn.to!string);
+        string hashtag =(obj.node.heading_lev_markup <= 4) ? "" : ("#" ~ obj.node.ocn.to!string);
         foreach_reverse (k; 0 .. 7) {
-          switch (obj.dom_markedup[k]) {
+          switch (obj.node.dom_markedup[k]) {
           case DomTags.close :
             toc ~= "\n    </navPoint>";
             break;
@@ -2179,7 +2179,7 @@ string epub2_oebps_toc_ncx(D,I)(D doc_abstraction, I doc_matters) {
     <content src="%s.xhtml%s" />¶",
               counter,
               _txt,
-              obj.segment_anchor_tag,
+              obj.tags.segment_anchor_tag,
               hashtag,
             );
             break;
@@ -2193,7 +2193,7 @@ string epub2_oebps_toc_ncx(D,I)(D doc_abstraction, I doc_matters) {
     <content src="%s.xhtml%s" />¶",
               counter,
               _txt,
-              obj.segment_anchor_tag,
+              obj.tags.segment_anchor_tag,
               hashtag,
             );
             break;
@@ -2211,7 +2211,7 @@ string epub2_oebps_toc_ncx(D,I)(D doc_abstraction, I doc_matters) {
 #+END_SRC
 
 ** the document contents                                               :seg:
-*** switch (sections & objects) format epub3 xhtml output
+*** ↻ loop & switch (sections & objects) format epub3 xhtml output
 
 #+name: output_epub3_xhtml_seg
 #+BEGIN_SRC d
@@ -2233,12 +2233,12 @@ void outputEPub3(D,I)(
   foreach (part; doc_matters.xml.keys_seq.seg) {
     foreach (obj; doc_abstraction[part]) {
       string _txt = xhtml_format.special_characters(obj, obj.text);
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         assert(part == "head" || "toc_seg" || "body" || "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-        switch (obj.heading_lev_markup) {
+        switch (obj.node.heading_lev_markup) {
         case 0: .. case 3:
           /+ fill buffer, and replace with new levels from 1 to 3 +/
-          switch (obj.heading_lev_markup) {
+          switch (obj.node.heading_lev_markup) {
           case 0:
             top_level_headings[0] = "";
             top_level_headings[1] = "";
@@ -2258,16 +2258,16 @@ void outputEPub3(D,I)(
             top_level_headings[3] = "";
             goto default;
           default:
-            doc_parts_ ~= obj.segment_anchor_tag;
-            doc_epub3[obj.segment_anchor_tag] ~= xhtml_format.epub3_seg_head(doc_matters);
+            doc_parts_ ~= obj.tags.segment_anchor_tag;
+            doc_epub3[obj.tags.segment_anchor_tag] ~= xhtml_format.epub3_seg_head(doc_matters);
             auto t = xhtml_format.heading_seg(obj, _txt, suffix, "epub");
-            doc_epub3[obj.segment_anchor_tag] ~= t[0];
-            doc_epub3_endnotes[obj.segment_anchor_tag] ~= t[1];
+            doc_epub3[obj.tags.segment_anchor_tag] ~= t[0];
+            doc_epub3_endnotes[obj.tags.segment_anchor_tag] ~= t[1];
             break;
           }
           break;
         case 4:
-          segment_filename = obj.segment_anchor_tag;
+          segment_filename = obj.tags.segment_anchor_tag;
           doc_epub3[segment_filename] ~= xhtml_format.epub3_seg_head(doc_matters);
           auto t = xhtml_format.heading_seg(obj, _txt, suffix, "epub");
           doc_epub3[segment_filename] ~= t[0];
@@ -2280,23 +2280,23 @@ void outputEPub3(D,I)(
           break;
         case 8: .. case 9:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a, ": ", obj.heading_lev_markup);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a, ": ", obj.node.heading_lev_markup);
             writeln(__FILE__, ":", __LINE__, ": ", obj.text);
           }
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a, ": ", obj.heading_lev_markup);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a, ": ", obj.node.heading_lev_markup);
           }
           break;
         }
       } else {
         assert(part == "head" || "toc_seg" || "body" || "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-        switch (obj.of_part) {
+        switch (obj.typeinfo.of_part) {
         case "frontmatter":             assert(part == "head" || "toc_seg");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "toc":
               auto t = xhtml_format.para_seg(obj, _txt, suffix, "epub");
               doc_epub3[segment_filename] ~= t[0];
@@ -2304,22 +2304,22 @@ void outputEPub3(D,I)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
           break;
         case "body":                    assert(part == "body");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "para":
               auto t = xhtml_format.para_seg(obj, _txt, suffix, "epub");
               doc_epub3[segment_filename] ~= t[0];
@@ -2327,13 +2327,13 @@ void outputEPub3(D,I)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           case "block":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "quote":
               auto t = xhtml_format.quote_seg(obj, _txt, suffix, "epub");
               doc_epub3[segment_filename] ~= t[0].to!string;
@@ -2365,23 +2365,23 @@ void outputEPub3(D,I)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
           break;
         case "backmatter":
           assert(part == "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "endnote":             assert(part == "endnotes");
               auto t = xhtml_format.para_seg(obj, _txt, suffix, "epub");
               doc_epub3[segment_filename] ~= t[0];
@@ -2408,14 +2408,14 @@ void outputEPub3(D,I)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
@@ -2424,53 +2424,53 @@ void outputEPub3(D,I)(
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.of_part);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.of_part);
           }
           break;
         }
       }
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         assert(obj.text.length > 0);
-        if (obj.heading_lev_markup <= 4) {
+        if (obj.node.heading_lev_markup <= 4) {
           oepbs_content_parts["manifest_documents"] ~=
             format(q"¶      <item id="%s.xhtml" href="%s.xhtml" media-type="application/xhtml+xml" />
 ¶",
-            obj.segment_anchor_tag,
-            obj.segment_anchor_tag,
+            obj.tags.segment_anchor_tag,
+            obj.tags.segment_anchor_tag,
           );
           oepbs_content_parts["spine"] ~=
             format(q"¶    <itemref idref="%s.xhtml" linear="yes" />
 ¶",
-            obj.segment_anchor_tag,
+            obj.tags.segment_anchor_tag,
           );
           oepbs_content_parts["guide"] ~=
             format(q"¶      <reference type="%s" href="%s" />
 ¶",
-            obj.segment_anchor_tag,
-            obj.segment_anchor_tag,
+            obj.tags.segment_anchor_tag,
+            obj.tags.segment_anchor_tag,
           );
-        } else if (obj.heading_lev_markup > 4) {
+        } else if (obj.node.heading_lev_markup > 4) {
           oepbs_content_parts["manifest_documents"] ~=
             format(q"¶      <item id="%s.xhtml#%s" href="%s.xhtml#%s" media-type="application/xhtml+xml" />
 ¶",
-            obj.segment_anchor_tag,
-            obj.obj_cite_number,
-            obj.segment_anchor_tag,
-            obj.obj_cite_number,
+            obj.tags.segment_anchor_tag,
+            obj.node.obj_cite_number,
+            obj.tags.segment_anchor_tag,
+            obj.node.obj_cite_number,
           );
           oepbs_content_parts["spine"] ~=
             format(q"¶    <itemref idref="%s.xhtml#%s" linear="yes" />
 ¶",
-            obj.segment_anchor_tag,
-            obj.obj_cite_number,
+            obj.tags.segment_anchor_tag,
+            obj.node.obj_cite_number,
           );
           oepbs_content_parts["guide"] ~=
             format(q"¶      <reference type="%s#%s" href="%s#%s" />
 ¶",
-            obj.segment_anchor_tag,
-            obj.obj_cite_number,
-            obj.segment_anchor_tag,
-            obj.obj_cite_number,
+            obj.tags.segment_anchor_tag,
+            obj.node.obj_cite_number,
+            obj.tags.segment_anchor_tag,
+            obj.node.obj_cite_number,
           );
         }
       }
diff --git a/org/sdp.org b/org/sdp.org
index 442fa7d..7a8d86d 100644
--- a/org/sdp.org
+++ b/org/sdp.org
@@ -26,7 +26,7 @@ struct Version {
   int minor;
   int patch;
 }
-enum ver = Version(0, 26, 2);
+enum ver = Version(0, 26, 3);
 #+END_SRC
 
 ** compilation restrictions (supported compilers)
@@ -179,7 +179,6 @@ mixin CompileTimeInfo;
 #+BEGIN_SRC d
 mixin SiSUrgxInit;
 mixin contentJSONtoSiSUstruct;
-mixin SiSUnode;
 mixin SiSUbiblio;
 mixin SiSUrgxInitFlags;
 mixin outputHub;
@@ -947,18 +946,18 @@ string[string] check = [
 ];
 foreach (k; doc_matters.xml.keys_seq.seg) {
   foreach (obj; doc_abstraction[k]) {
-    if (obj.of_part != "empty") {
-      if (!empty(obj.obj_cite_number)) {
+    if (obj.typeinfo.of_part != "empty") {
+      if (!empty(obj.node.obj_cite_number)) {
         if (k == "body") {
-          check["last_obj_cite_number_body"] = obj.obj_cite_number;
+          check["last_obj_cite_number_body"] = obj.node.obj_cite_number;
         }
-        if (!(obj.obj_cite_number.empty)) {
-          check["last_obj_cite_number"] = obj.obj_cite_number;
+        if (!(obj.node.obj_cite_number.empty)) {
+          check["last_obj_cite_number"] = obj.node.obj_cite_number;
         }
       }
       if (k == "bookindex_seg") {
-        if (obj.obj_cite_number_type == 2) {
-          check["last_obj_cite_number_bkidx"] = obj.obj_cite_number_bkidx;
+        if (obj.misc.obj_cite_number_type == 2) {
+          check["last_obj_cite_number_bkidx"] = obj.misc.obj_cite_number_bkidx;
         }
       }
     }
diff --git a/src/sdp/meta/doc_debugs.d b/src/sdp/meta/doc_debugs.d
index 18f50ad..60ad63f 100644
--- a/src/sdp/meta/doc_debugs.d
+++ b/src/sdp/meta/doc_debugs.d
@@ -39,8 +39,8 @@ template SiSUdebugs() {
       );
       foreach (key; doc_matters.xml.keys_seq.seg) {
         foreach (obj; contents[key]) {
-          if (obj.of_part != "empty") {
-            if (obj.is_a == "heading") {
+          if (obj.typeinfo.of_part != "empty") {
+            if (obj.typeinfo.is_a == "heading") {
               writefln(
                 "%s node: %s heading: %s %s",
                 obj.obj_cite_number,
@@ -61,11 +61,11 @@ template SiSUdebugs() {
       );
       if (key.length > 0) {
         foreach (obj; contents[key]) {
-          if (obj.of_part != "empty") {
+          if (obj.typeinfo.of_part != "empty") {
             writefln(
               "[%s][%s]\n%s",
               obj.obj_cite_number,
-              obj.is_a,
+              obj.typeinfo.is_a,
               obj.text
             );
           }
@@ -79,7 +79,7 @@ template SiSUdebugs() {
           writefln(
             "[%s][%s]\n%s",
             obj.obj_cite_number,
-            obj.is_a,
+            obj.typeinfo.is_a,
             obj.text
           );
         }
@@ -108,7 +108,7 @@ template SiSUdebugs() {
           writefln(
             "[%s][%s]\n%s",
             obj.obj_cite_number,
-            obj.is_a,
+            obj.typeinfo.is_a,
             obj.text
           );
         }
@@ -118,7 +118,7 @@ template SiSUdebugs() {
       enum DomTags { none, open, close, close_and_open, open_still, }
       foreach (sect; doc_matters.xml.keys_seq.seg) {
         foreach (obj; contents[sect]) {
-          if (obj.is_a == "heading") {
+          if (obj.typeinfo.is_a == "heading") {
             foreach_reverse (k; 0 .. 7) {
               switch (obj.dom_markedup[k]) {
               case DomTags.close :
@@ -145,7 +145,7 @@ template SiSUdebugs() {
       writeln("--------------------");
       foreach (sect; doc_matters.xml.keys_seq.seg) {
         foreach (obj; contents[sect]) {
-          if (obj.is_a == "heading") {
+          if (obj.typeinfo.is_a == "heading") {
             foreach_reverse (k; 0 .. 7) {
               switch (obj.dom_collapsed[k]) {
               case DomTags.close :
@@ -185,7 +185,7 @@ template SiSUdebugs() {
           writefln(
             "[%s][%s]\n%s",
             obj.obj_cite_number,
-            obj.is_a,
+            obj.typeinfo.is_a,
             obj.text
           );
         }
@@ -198,7 +198,7 @@ template SiSUdebugs() {
           writefln(
             "[%s][%s]\n%s",
             obj.obj_cite_number,
-            obj.is_a,
+            obj.typeinfo.is_a,
             obj.text
           );
         }
@@ -223,7 +223,7 @@ template SiSUdebugs() {
           writefln(
             "[%s][%s]\n%s",
             obj.obj_cite_number,
-            obj.is_a,
+            obj.typeinfo.is_a,
             obj.text
           );
         }
@@ -236,11 +236,11 @@ template SiSUdebugs() {
         __LINE__,
       );
       foreach (obj; contents[key]) {
-        if (obj.of_part != "empty") {
+        if (obj.typeinfo.of_part != "empty") {
           writefln(
             "* [%s][%s] %s",
             obj.obj_cite_number,
-            obj.is_a,
+            obj.typeinfo.is_a,
             obj.text
           );
         }
@@ -402,7 +402,7 @@ template SiSUdebugs() {
       );
       foreach (k; doc_matters.xml.keys_seq.seg) {
         foreach (obj; contents[k]) {
-          if (obj.is_a == "heading") {
+          if (obj.typeinfo.is_a == "heading") {
             writefln(
               "%s~ [%s] %s %s",
               obj.marked_up_level,
@@ -418,7 +418,7 @@ template SiSUdebugs() {
     debug(heading) {                         // heading
       foreach (k; doc_matters.xml.keys_seq.seg) {
         foreach (o; contents[k]) {
-          if (o.is_a == "heading") {
+          if (o.typeinfo.is_a == "heading") {
             writefln(
               "%s* %s\n                (markup level: %s; collapsed level: %s)",
               replicate("  ", o.heading_lev_markup),
@@ -438,7 +438,7 @@ template SiSUdebugs() {
       );
       foreach (k; doc_matters.xml.keys_seq.seg) {
         foreach (obj; contents[k]) {
-          if (obj.is_a == "heading") {
+          if (obj.typeinfo.is_a == "heading") {
             writefln(
               "%s~ [%s] %s",
               obj.marked_up_level,
@@ -627,7 +627,7 @@ template SiSUdebugs() {
               foreach (obj; contents[key]) {
                 writefln(
                   "[%s]\n%s",
-                  obj.is_a,
+                  obj.typeinfo.is_a,
                   obj.text
                 );
               }
@@ -644,7 +644,7 @@ template SiSUdebugs() {
                 writefln(
                   "[%s][%s]\n%s",
                   obj.obj_cite_number,
-                  obj.is_a,
+                  obj.typeinfo.is_a,
                   obj.text
                 );
               }
diff --git a/src/sdp/meta/metadoc.d b/src/sdp/meta/metadoc.d
index 4aaafce..8160010 100644
--- a/src/sdp/meta/metadoc.d
+++ b/src/sdp/meta/metadoc.d
@@ -21,7 +21,6 @@ template SiSUabstraction() {
     sdp.output.paths_source;
   mixin SiSUrgxInit;
   mixin contentJSONtoSiSUstruct;
-  mixin SiSUnode;
   mixin SiSUbiblio;
   mixin SiSUrgxInitFlags;
   mixin outputHub;
diff --git a/src/sdp/meta/metadoc_from_src.d b/src/sdp/meta/metadoc_from_src.d
index 8fb22be..ba85b68 100644
--- a/src/sdp/meta/metadoc_from_src.d
+++ b/src/sdp/meta/metadoc_from_src.d
@@ -88,7 +88,7 @@ template SiSUdocAbstraction() {
     O          obj,
     string[]   lv_ancestors_txt,
   ) {
-    switch (obj.heading_lev_markup) {
+    switch (obj.node.heading_lev_markup) {
     case 0:
       lv_ancestors_txt[0] = obj.text.to!string;
       foreach(k; 1..8) {
@@ -133,7 +133,7 @@ template SiSUdocAbstraction() {
       lv_ancestors_txt[7] = obj.text.to!string;
       goto default;
     default:
-      obj.heading_ancestors_text = lv_ancestors_txt.dup;
+      obj.tags.heading_ancestors_text = lv_ancestors_txt.dup;
     }
     return obj;
   }
@@ -178,7 +178,7 @@ template SiSUdocAbstraction() {
     debug(dom_magic_numbers) {
       writeln("marked up: ", lev, ": ", dom);
     }
-    obj.dom_markedup = dom.dup;
+    obj.node.dom_markedup = dom.dup;
     return obj;
   }
   pure auto obj_dom_set_collapsed_tags(O)(
@@ -222,7 +222,7 @@ template SiSUdocAbstraction() {
     debug(dom_magic_numbers) {
       writeln("collapsed: ", lev, ": ", dom);
     }
-    obj.dom_collapsed = dom.dup;
+    obj.node.dom_collapsed = dom.dup;
     return obj;
   }
   static auto ocn_emit(int ocn_status_flag) {
@@ -323,29 +323,29 @@ template SiSUdocAbstraction() {
     ];
     string _anchor_tag;
     string toc_txt_;
-    an_object["glossary_nugget"]            = "";
-    an_object["blurb_nugget"]               = "";
-    comp_obj_heading_                       = comp_obj_heading_.init;
-    comp_obj_heading_.of_part               = "frontmatter";
-    comp_obj_heading_.of_section            = "toc";
-    comp_obj_heading_.is_of                 = "para";
-    comp_obj_heading_.is_a                  = "heading";
-    comp_obj_heading_.text                  = "Table of Contents";
-    comp_obj_heading_.ocn                   = 0;
-    comp_obj_heading_.obj_cite_number       = "";
-    comp_obj_heading_.obj_cite_number_off   = "";
-    comp_obj_heading_.obj_cite_number_type  = 0;
-    comp_obj_heading_.segment_anchor_tag    = "toc";
-    comp_obj_heading_.marked_up_level       = "1";
-    comp_obj_heading_.heading_lev_markup    = 4;
-    comp_obj_heading_.heading_lev_collapsed = 1;
-    comp_obj_heading_.parent_ocn            = 1;
-    comp_obj_heading_.parent_lev_markup     = 0;
-    comp_obj_heading_.ptr_html_segnames     = html_segnames_ptr;
-    comp_obj_heading_.anchor_tags           = ["toc"];
-    comp_obj_heading_.dom_markedup          = [ 1, 1, 0, 0, 1, 0, 0, 0];
-    comp_obj_heading_.dom_collapsed         = [ 1, 1, 1, 0, 0, 0, 0, 0];
-    auto toc_head                           = comp_obj_heading_;
+    an_object["glossary_nugget"]                 = "";
+    an_object["blurb_nugget"]                    = "";
+    comp_obj_heading_                            = comp_obj_heading_.init;
+    comp_obj_heading_.typeinfo.of_part           = "frontmatter";
+    comp_obj_heading_.typeinfo.of_section        = "toc";
+    comp_obj_heading_.typeinfo.is_of             = "para";
+    comp_obj_heading_.typeinfo.is_a              = "heading";
+    comp_obj_heading_.text                       = "Table of Contents";
+    comp_obj_heading_.node.ocn                   = 0;
+    comp_obj_heading_.node.obj_cite_number       = "";
+    comp_obj_heading_.misc.obj_cite_number_off   = "";
+    comp_obj_heading_.misc.obj_cite_number_type  = 0;
+    comp_obj_heading_.tags.segment_anchor_tag    = "toc";
+    comp_obj_heading_.node.marked_up_level       = "1";
+    comp_obj_heading_.node.heading_lev_markup    = 4;
+    comp_obj_heading_.node.heading_lev_collapsed = 1;
+    comp_obj_heading_.node.parent_ocn            = 1;
+    comp_obj_heading_.node.parent_lev_markup     = 0;
+    comp_obj_heading_.ptr.html_segnames          = html_segnames_ptr;
+    comp_obj_heading_.tags.anchor_tags           = ["toc"];
+    comp_obj_heading_.node.dom_markedup          = [ 1, 1, 0, 0, 1, 0, 0, 0];
+    comp_obj_heading_.node.dom_collapsed         = [ 1, 1, 1, 0, 0, 0, 0, 0];
+    auto toc_head                                = comp_obj_heading_;
     html_segnames_ptr_cntr++;
     the_table_of_contents_section = [
       "seg": [toc_head],
@@ -466,60 +466,60 @@ template SiSUdocAbstraction() {
             line_occur["para"] = State.off;
             an_object_key="glossary_nugget"; //
             if (line.matchFirst(rgx.heading_glossary)) {
-              comp_obj_heading_                       = comp_obj_heading_.init;
-              comp_obj_heading_.of_part               = "backmatter";
-              comp_obj_heading_.of_section            = "glossary";
-              comp_obj_heading_.is_of                 = "para";
-              comp_obj_heading_.is_a                  = "heading";
-              comp_obj_heading_.text                  = "Glossary";
-              comp_obj_heading_.ocn                   = 0;
-              comp_obj_heading_.obj_cite_number       = "";
-              comp_obj_heading_.obj_cite_number_off   = "";
-              comp_obj_heading_.obj_cite_number_type  = 0;
-              comp_obj_heading_.segment_anchor_tag    = "_part_glossary";
-              comp_obj_heading_.marked_up_level       = "B";
-              comp_obj_heading_.heading_lev_markup    = 1;
-              comp_obj_heading_.heading_lev_collapsed = 1;
-              comp_obj_heading_.parent_ocn            = 1;
-              comp_obj_heading_.parent_lev_markup     = 0;
-              comp_obj_heading_.dom_markedup          = [ 1, 1, 0, 0, 0, 0, 0, 0];
-              comp_obj_heading_.dom_collapsed         = [ 1, 1, 0, 0, 0, 0, 0, 0];
-              the_glossary_section                    ~= comp_obj_heading_;
-              comp_obj_heading_                       = comp_obj_heading_.init;
-              comp_obj_heading_.of_part               = "backmatter";
-              comp_obj_heading_.of_section            = "glossary";
-              comp_obj_heading_.is_of                 = "para";
-              comp_obj_heading_.is_a                  = "heading";
-              comp_obj_heading_.text                  = "Glossary";
-              comp_obj_heading_.ocn                   = 0;
-              comp_obj_heading_.obj_cite_number       = "";
-              comp_obj_heading_.obj_cite_number_off   = "";
-              comp_obj_heading_.obj_cite_number_type  = 0;
-              comp_obj_heading_.segment_anchor_tag    = "glossary";
-              comp_obj_heading_.marked_up_level       = "1";
-              comp_obj_heading_.heading_lev_markup    = 4;
-              comp_obj_heading_.heading_lev_collapsed = 2;
-              comp_obj_heading_.parent_ocn            = 1;
-              comp_obj_heading_.parent_lev_markup     = 0;
-              comp_obj_heading_.dom_markedup          = [ 1, 1, 0, 0, 1, 0, 0, 0];
-              comp_obj_heading_.dom_collapsed         = [ 1, 1, 1, 0, 0, 0, 0, 0];
-              comp_obj_heading_.anchor_tags           = ["glossary"];
-              the_glossary_section                    ~= comp_obj_heading_;
+              comp_obj_heading_                            = comp_obj_heading_.init;
+              comp_obj_heading_.typeinfo.of_part           = "backmatter";
+              comp_obj_heading_.typeinfo.of_section        = "glossary";
+              comp_obj_heading_.typeinfo.is_of             = "para";
+              comp_obj_heading_.typeinfo.is_a              = "heading";
+              comp_obj_heading_.text                       = "Glossary";
+              comp_obj_heading_.node.ocn                   = 0;
+              comp_obj_heading_.node.obj_cite_number       = "";
+              comp_obj_heading_.misc.obj_cite_number_off   = "";
+              comp_obj_heading_.misc.obj_cite_number_type  = 0;
+              comp_obj_heading_.tags.segment_anchor_tag    = "_part_glossary";
+              comp_obj_heading_.node.marked_up_level       = "B";
+              comp_obj_heading_.node.heading_lev_markup    = 1;
+              comp_obj_heading_.node.heading_lev_collapsed = 1;
+              comp_obj_heading_.node.parent_ocn            = 1;
+              comp_obj_heading_.node.parent_lev_markup     = 0;
+              comp_obj_heading_.node.dom_markedup          = [ 1, 1, 0, 0, 0, 0, 0, 0];
+              comp_obj_heading_.node.dom_collapsed         = [ 1, 1, 0, 0, 0, 0, 0, 0];
+              the_glossary_section                         ~= comp_obj_heading_;
+              comp_obj_heading_                            = comp_obj_heading_.init;
+              comp_obj_heading_.typeinfo.of_part           = "backmatter";
+              comp_obj_heading_.typeinfo.of_section        = "glossary";
+              comp_obj_heading_.typeinfo.is_of             = "para";
+              comp_obj_heading_.typeinfo.is_a              = "heading";
+              comp_obj_heading_.text                       = "Glossary";
+              comp_obj_heading_.node.ocn                   = 0;
+              comp_obj_heading_.node.obj_cite_number       = "";
+              comp_obj_heading_.misc.obj_cite_number_off   = "";
+              comp_obj_heading_.misc.obj_cite_number_type  = 0;
+              comp_obj_heading_.tags.segment_anchor_tag    = "glossary";
+              comp_obj_heading_.node.marked_up_level       = "1";
+              comp_obj_heading_.node.heading_lev_markup    = 4;
+              comp_obj_heading_.node.heading_lev_collapsed = 2;
+              comp_obj_heading_.node.parent_ocn            = 1;
+              comp_obj_heading_.node.parent_lev_markup     = 0;
+              comp_obj_heading_.node.dom_markedup          = [ 1, 1, 0, 0, 1, 0, 0, 0];
+              comp_obj_heading_.node.dom_collapsed         = [ 1, 1, 1, 0, 0, 0, 0, 0];
+              comp_obj_heading_.tags.anchor_tags           = ["glossary"];
+              the_glossary_section                         ~= comp_obj_heading_;
             } else {
               _para_match_(line, an_object, an_object_key, indent, bullet, obj_type_status, line_occur);
               comp_obj_para                           = comp_obj_para.init;
-              comp_obj_para.of_part                   = "backmatter";
-              comp_obj_para.of_section                = "glossary";
-              comp_obj_para.is_of                     = "para";
-              comp_obj_para.is_a                      = "glossary";
+              comp_obj_para.typeinfo.of_part          = "backmatter";
+              comp_obj_para.typeinfo.of_section       = "glossary";
+              comp_obj_para.typeinfo.is_of            = "para";
+              comp_obj_para.typeinfo.is_a             = "glossary";
               comp_obj_para.text                      = line.to!string.strip;
-              comp_obj_para.ocn                       = 0;
-              comp_obj_para.obj_cite_number           = "";
-              comp_obj_para.obj_cite_number_off       = "";
-              comp_obj_para.obj_cite_number_type      = 0;
-              comp_obj_para.indent_hang               = indent["hang_position"];
-              comp_obj_para.indent_base               = indent["base_position"];
-              comp_obj_para.bullet                    = bullet;
+              comp_obj_para.node.ocn                  = 0;
+              comp_obj_para.node.obj_cite_number      = "";
+              comp_obj_para.misc.obj_cite_number_off  = "";
+              comp_obj_para.misc.obj_cite_number_type = 0;
+              comp_obj_para.attrib.indent_hang        = indent["hang_position"];
+              comp_obj_para.attrib.indent_base        = indent["base_position"];
+              comp_obj_para.attrib.bullet             = bullet;
               the_glossary_section                    ~= comp_obj_para;
             }
             obj_type_status["ocn_status"] = OCNstatus.on;
@@ -577,80 +577,80 @@ template SiSUdocAbstraction() {
             line_occur["para"] = State.off;
             an_object_key="blurb_nugget";
             if (line.matchFirst(rgx.heading_blurb)) {
-              comp_obj_heading_                       = comp_obj_heading_.init;
-              comp_obj_heading_.of_part               = "backmatter";
-              comp_obj_heading_.of_section            = "blurb";
-              comp_obj_heading_.is_of                 = "para";
-              comp_obj_heading_.is_a                  = "heading";
-              comp_obj_heading_.text                  = "Blurb";
-              comp_obj_heading_.ocn                   = 0;
-              comp_obj_heading_.obj_cite_number       = "";
-              comp_obj_heading_.obj_cite_number_off   = "";
-              comp_obj_heading_.obj_cite_number_type  = 0;
-              comp_obj_heading_.segment_anchor_tag    = "_part_blurb";
-              comp_obj_heading_.marked_up_level       = "B";
-              comp_obj_heading_.heading_lev_markup    = 1;
-              comp_obj_heading_.heading_lev_collapsed = 1;
-              comp_obj_heading_.parent_ocn            = 1;
-              comp_obj_heading_.parent_lev_markup     = 0;
-              comp_obj_heading_.dom_markedup          = [ 1, 1, 0, 0, 0, 0, 0, 0];
-              comp_obj_heading_.dom_collapsed         = [ 1, 1, 0, 0, 0, 0, 0, 0];
-              the_blurb_section                       ~= comp_obj_heading_;
-              comp_obj_heading_                       = comp_obj_heading_.init;
-              comp_obj_heading_.of_part               = "backmatter";
-              comp_obj_heading_.of_section            = "blurb";
-              comp_obj_heading_.is_of                 = "para";
-              comp_obj_heading_.is_a                  = "heading";
-              comp_obj_heading_.text                  = "Blurb";
-              comp_obj_heading_.ocn                   = 0;
-              comp_obj_heading_.obj_cite_number       = "";
-              comp_obj_heading_.obj_cite_number_off   = "";
-              comp_obj_heading_.obj_cite_number_type  = 0;
-              comp_obj_heading_.segment_anchor_tag    = "blurb";
-              comp_obj_heading_.marked_up_level       = "1";
-              comp_obj_heading_.heading_lev_markup    = 4;
-              comp_obj_heading_.heading_lev_collapsed = 2;
-              comp_obj_heading_.parent_ocn            = 1;
-              comp_obj_heading_.parent_lev_markup     = 0;
-              comp_obj_heading_.anchor_tags           = ["blurb"];
-              comp_obj_heading_.dom_markedup          = [ 1, 1, 0, 0, 1, 0, 0, 0];
-              comp_obj_heading_.dom_collapsed         = [ 1, 1, 1, 0, 0, 0, 0, 0];
-              the_blurb_section                       ~= comp_obj_heading_;
+              comp_obj_heading_                            = comp_obj_heading_.init;
+              comp_obj_heading_.typeinfo.of_part           = "backmatter";
+              comp_obj_heading_.typeinfo.of_section        = "blurb";
+              comp_obj_heading_.typeinfo.is_of             = "para";
+              comp_obj_heading_.typeinfo.is_a              = "heading";
+              comp_obj_heading_.text                       = "Blurb";
+              comp_obj_heading_.node.ocn                   = 0;
+              comp_obj_heading_.node.obj_cite_number       = "";
+              comp_obj_heading_.misc.obj_cite_number_off   = "";
+              comp_obj_heading_.misc.obj_cite_number_type  = 0;
+              comp_obj_heading_.tags.segment_anchor_tag    = "_part_blurb";
+              comp_obj_heading_.node.marked_up_level       = "B";
+              comp_obj_heading_.node.heading_lev_markup    = 1;
+              comp_obj_heading_.node.heading_lev_collapsed = 1;
+              comp_obj_heading_.node.parent_ocn            = 1;
+              comp_obj_heading_.node.parent_lev_markup     = 0;
+              comp_obj_heading_.node.dom_markedup          = [ 1, 1, 0, 0, 0, 0, 0, 0];
+              comp_obj_heading_.node.dom_collapsed         = [ 1, 1, 0, 0, 0, 0, 0, 0];
+              the_blurb_section                            ~= comp_obj_heading_;
+              comp_obj_heading_                            = comp_obj_heading_.init;
+              comp_obj_heading_.typeinfo.of_part           = "backmatter";
+              comp_obj_heading_.typeinfo.of_section        = "blurb";
+              comp_obj_heading_.typeinfo.is_of             = "para";
+              comp_obj_heading_.typeinfo.is_a              = "heading";
+              comp_obj_heading_.text                       = "Blurb";
+              comp_obj_heading_.node.ocn                   = 0;
+              comp_obj_heading_.node.obj_cite_number       = "";
+              comp_obj_heading_.misc.obj_cite_number_off   = "";
+              comp_obj_heading_.misc.obj_cite_number_type  = 0;
+              comp_obj_heading_.tags.segment_anchor_tag    = "blurb";
+              comp_obj_heading_.node.marked_up_level       = "1";
+              comp_obj_heading_.node.heading_lev_markup    = 4;
+              comp_obj_heading_.node.heading_lev_collapsed = 2;
+              comp_obj_heading_.node.parent_ocn            = 1;
+              comp_obj_heading_.node.parent_lev_markup     = 0;
+              comp_obj_heading_.tags.anchor_tags           = ["blurb"];
+              comp_obj_heading_.node.dom_markedup          = [ 1, 1, 0, 0, 1, 0, 0, 0];
+              comp_obj_heading_.node.dom_collapsed         = [ 1, 1, 1, 0, 0, 0, 0, 0];
+              the_blurb_section                            ~= comp_obj_heading_;
             } else if (line.matchFirst(rgx.heading)
             && (opt_action.backmatter && opt_action.section_blurb)) {
-              comp_obj_heading_                       = comp_obj_heading_.init;
-              comp_obj_heading_.of_part               = "backmatter";
-              comp_obj_heading_.of_section            = "blurb";
-              comp_obj_heading_.is_of                 = "para";
-              comp_obj_heading_.is_a                  = "heading";
-              comp_obj_heading_.text                  = line.to!string;
-              comp_obj_heading_.ocn                   = 0;
-              comp_obj_heading_.obj_cite_number       = "";
-              comp_obj_heading_.obj_cite_number_off   = "";
-              comp_obj_heading_.obj_cite_number_type  = 0;
-              comp_obj_heading_.segment_anchor_tag    = "blurb";
-              comp_obj_heading_.marked_up_level       = an_object["lev"].to!string;
-              comp_obj_heading_.heading_lev_markup    = an_object["lev_markup_number"].to!int;    // make int, remove need to conv
-              comp_obj_heading_.heading_lev_collapsed = an_object["lev_collapsed_number"].to!int; // make int, remove need to conv
-              comp_obj_heading_.parent_ocn            = 1;
-              comp_obj_heading_.parent_lev_markup     = 0;
-              the_blurb_section                       ~= comp_obj_heading_;
+              comp_obj_heading_                            = comp_obj_heading_.init;
+              comp_obj_heading_.typeinfo.of_part           = "backmatter";
+              comp_obj_heading_.typeinfo.of_section        = "blurb";
+              comp_obj_heading_.typeinfo.is_of             = "para";
+              comp_obj_heading_.typeinfo.is_a              = "heading";
+              comp_obj_heading_.text                       = line.to!string;
+              comp_obj_heading_.node.ocn                   = 0;
+              comp_obj_heading_.node.obj_cite_number       = "";
+              comp_obj_heading_.misc.obj_cite_number_off   = "";
+              comp_obj_heading_.misc.obj_cite_number_type  = 0;
+              comp_obj_heading_.tags.segment_anchor_tag    = "blurb";
+              comp_obj_heading_.node.marked_up_level       = an_object["lev"].to!string;
+              comp_obj_heading_.node.heading_lev_markup    = an_object["lev_markup_number"].to!int;    // make int, remove need to conv
+              comp_obj_heading_.node.heading_lev_collapsed = an_object["lev_collapsed_number"].to!int; // make int, remove need to conv
+              comp_obj_heading_.node.parent_ocn            = 1;
+              comp_obj_heading_.node.parent_lev_markup     = 0;
+              the_blurb_section                            ~= comp_obj_heading_;
             } else {
               _para_match_(line, an_object, an_object_key, indent, bullet, obj_type_status, line_occur);
               comp_obj_para                           = comp_obj_para.init;
-              comp_obj_para.of_part                   = "backmatter";
-              comp_obj_para.of_section                = "blurb";
-              comp_obj_para.is_of                     = "para";
-              comp_obj_para.is_a                      = "blurb";
+              comp_obj_para.typeinfo.of_part          = "backmatter";
+              comp_obj_para.typeinfo.of_section       = "blurb";
+              comp_obj_para.typeinfo.is_of            = "para";
+              comp_obj_para.typeinfo.is_a             = "blurb";
               comp_obj_para.text                      = munge.url_links(line.to!string.strip).replaceFirst(rgx.para_attribs, "");
-              comp_obj_para.ocn                       = 0;
-              comp_obj_para.obj_cite_number           = "";
-              comp_obj_para.obj_cite_number_off       = "";
-              comp_obj_para.obj_cite_number_type      = 0;
-              comp_obj_para.indent_hang               = indent["hang_position"];
-              comp_obj_para.indent_base               = indent["base_position"];
-              comp_obj_para.inline_links              = true;
-              comp_obj_para.bullet                    = bullet;
+              comp_obj_para.node.ocn                  = 0;
+              comp_obj_para.node.obj_cite_number      = "";
+              comp_obj_para.misc.obj_cite_number_off  = "";
+              comp_obj_para.misc.obj_cite_number_type = 0;
+              comp_obj_para.attrib.indent_hang        = indent["hang_position"];
+              comp_obj_para.attrib.indent_base        = indent["base_position"];
+              comp_obj_para.has.inline_links          = true;
+              comp_obj_para.attrib.bullet             = bullet;
               the_blurb_section                       ~= comp_obj_para;
             }
             obj_type_status["ocn_status"] = OCNstatus.on;
@@ -748,14 +748,14 @@ template SiSUdocAbstraction() {
                 debug(comment) {
                   writeln(line);
                 }
-                an_object[an_object_key]           ~= line ~= "\n";
-                comp_obj_comment                   = comp_obj_comment.init;
-                comp_obj_comment.of_part           = "comment"; // breaks flow
-                comp_obj_comment.of_section        = "comment"; // breaks flow
-                comp_obj_comment.is_of             = "comment";
-                comp_obj_comment.is_a              = "comment";
-                comp_obj_comment.text              = an_object[an_object_key].strip;
-                the_document_body_section          ~= comp_obj_comment;
+                an_object[an_object_key]             ~= line ~= "\n";
+                comp_obj_comment                     = comp_obj_comment.init;
+                comp_obj_comment.typeinfo.of_part    = "comment"; // breaks flow
+                comp_obj_comment.typeinfo.of_section = "comment"; // breaks flow
+                comp_obj_comment.typeinfo.is_of      = "comment";
+                comp_obj_comment.typeinfo.is_a       = "comment";
+                comp_obj_comment.text                = an_object[an_object_key].strip;
+                the_document_body_section            ~= comp_obj_comment;
                 _common_reset_(line_occur, an_object, obj_type_status);
                 processing.remove("verse");
                 ++cntr;
@@ -953,26 +953,26 @@ template SiSUdocAbstraction() {
                 = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta);
               an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
               anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
-              comp_obj_para                       = comp_obj_para.init;
-              comp_obj_para.of_part               = "body";
-              comp_obj_para.of_section            = "body";
-              comp_obj_para.is_of                 = "para";
-              comp_obj_para.is_a                  = "para";
-              comp_obj_para.text                  = an_object["substantive"].to!string.strip;
-              comp_obj_para.ocn                   = obj_cite_digits.digit;
-              comp_obj_para.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-              comp_obj_para.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-              comp_obj_para.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-              comp_obj_para.obj_cite_number_type  = obj_cite_digits.type;
-              comp_obj_para.indent_hang           = indent["hang_position"];
-              comp_obj_para.indent_base           = indent["base_position"];
-              comp_obj_para.bullet                = bullet;
-              comp_obj_para.anchor_tags           = anchor_tags;
-              comp_obj_para.inline_notes_reg      = substantive_obj_misc_tuple[sObj.notes_reg];
-              comp_obj_para.inline_notes_star     = substantive_obj_misc_tuple[sObj.notes_star];
-              comp_obj_para.inline_links          = substantive_obj_misc_tuple[sObj.links];
-              comp_obj_para.contains_image_without_dimensions  = substantive_obj_misc_tuple[sObj.image_no_dimensions];
-              the_document_body_section           ~= comp_obj_para;
+              comp_obj_para                                          = comp_obj_para.init;
+              comp_obj_para.typeinfo.of_part                         = "body";
+              comp_obj_para.typeinfo.of_section                      = "body";
+              comp_obj_para.typeinfo.is_of                           = "para";
+              comp_obj_para.typeinfo.is_a                            = "para";
+              comp_obj_para.text                                     = an_object["substantive"].to!string.strip;
+              comp_obj_para.node.ocn                                 = obj_cite_digits.digit;
+              comp_obj_para.node.obj_cite_number                     = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+              comp_obj_para.misc.obj_cite_number_off                 = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+              comp_obj_para.misc.obj_cite_number_bkidx               = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+              comp_obj_para.misc.obj_cite_number_type                = obj_cite_digits.type;
+              comp_obj_para.attrib.indent_hang                       = indent["hang_position"];
+              comp_obj_para.attrib.indent_base                       = indent["base_position"];
+              comp_obj_para.attrib.bullet                            = bullet;
+              comp_obj_para.tags.anchor_tags                         = anchor_tags;
+              comp_obj_para.has.inline_notes_reg                     = substantive_obj_misc_tuple[sObj.notes_reg];
+              comp_obj_para.has.inline_notes_star                    = substantive_obj_misc_tuple[sObj.notes_star];
+              comp_obj_para.has.inline_links                         = substantive_obj_misc_tuple[sObj.links];
+              comp_obj_para.has.contains_image_without_dimensions    = substantive_obj_misc_tuple[sObj.image_no_dimensions];
+              the_document_body_section                              ~= comp_obj_para;
               _common_reset_(line_occur, an_object, obj_type_status);
               indent=[
                 "hang_position" : 0,
@@ -989,23 +989,23 @@ template SiSUdocAbstraction() {
       } // close after non code, other blocks or regular text
       /+ unless (the_document_body_section.length == 0) ? +/
       if (the_document_body_section.length > 0) {
-        if (((the_document_body_section[$-1].is_a == "para")
-          || (the_document_body_section[$-1].is_a == "heading")
-          || (the_document_body_section[$-1].is_a == "quote")
-          || (the_document_body_section[$-1].is_a == "group")
-          || (the_document_body_section[$-1].is_a == "block")
-          || (the_document_body_section[$-1].is_a == "verse"))
+        if (((the_document_body_section[$-1].typeinfo.is_a == "para")
+          || (the_document_body_section[$-1].typeinfo.is_a == "heading")
+          || (the_document_body_section[$-1].typeinfo.is_a == "quote")
+          || (the_document_body_section[$-1].typeinfo.is_a == "group")
+          || (the_document_body_section[$-1].typeinfo.is_a == "block")
+          || (the_document_body_section[$-1].typeinfo.is_a == "verse"))
         && (the_document_body_section.length > previous_length)) {
-          if ((the_document_body_section[$-1].is_a == "heading")
-          && (the_document_body_section[$-1].heading_lev_markup < 5)) {
+          if ((the_document_body_section[$-1].typeinfo.is_a == "heading")
+          && (the_document_body_section[$-1].node.heading_lev_markup < 5)) {
             obj_type_status["biblio_section"]   = State.off;
             obj_type_status["glossary_section"] = State.off;
             obj_type_status["blurb_section"]    = State.off;
           }
-          if (the_document_body_section[$-1].is_a == "verse") {
+          if (the_document_body_section[$-1].typeinfo.is_a == "verse") {
             /+ scan for endnotes for whole poem (each verse in poem) +/
             foreach (i; previous_length .. the_document_body_section.length) {
-              if (the_document_body_section[i].is_a == "verse") {
+              if (the_document_body_section[i].typeinfo.is_a == "verse") {
                 if ((the_document_body_section[i].text).match(
                   rgx.inline_notes_delimiter_al_regular_number_note
                 )) {
@@ -1052,22 +1052,22 @@ template SiSUdocAbstraction() {
       }
     }
     if (an_object["glossary_nugget"].length == 0) {
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "empty";
-      comp_obj_heading_.of_section            = "empty";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "(skip) there is no Glossary section";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.marked_up_level       = "B";
-      comp_obj_heading_.heading_lev_markup    = 1;
-      comp_obj_heading_.heading_lev_collapsed = 1;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      the_glossary_section                    ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "empty";
+      comp_obj_heading_.typeinfo.of_section        = "empty";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "(skip) there is no Glossary section";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.node.marked_up_level       = "B";
+      comp_obj_heading_.node.heading_lev_markup    = 1;
+      comp_obj_heading_.node.heading_lev_collapsed = 1;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      the_glossary_section                         ~= comp_obj_heading_;
     } else {
       writeln("gloss");
     }
@@ -1081,58 +1081,58 @@ template SiSUdocAbstraction() {
     auto biblio_ordered
       = biblio._bibliography_(biblio_unsorted_incomplete, bib_arr_json);
     if (biblio_ordered.length > 0) {
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "backmatter";
-      comp_obj_heading_.of_section            = "bibliography";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "Bibliography";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.segment_anchor_tag    = "_part_bibliography";
-      comp_obj_heading_.marked_up_level       = "B";
-      comp_obj_heading_.heading_lev_markup    = 1;
-      comp_obj_heading_.heading_lev_collapsed = 1;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      the_bibliography_section                ~= comp_obj_heading_;
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "backmatter";
-      comp_obj_heading_.of_section            = "bibliography";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "Bibliography";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.segment_anchor_tag    = "bibliography";
-      comp_obj_heading_.marked_up_level       = "1";
-      comp_obj_heading_.heading_lev_markup    = 4;
-      comp_obj_heading_.heading_lev_collapsed = 2;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      comp_obj_heading_.anchor_tags           = ["bibliography"];
-      the_bibliography_section                ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "backmatter";
+      comp_obj_heading_.typeinfo.of_section        = "bibliography";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "Bibliography";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.tags.segment_anchor_tag    = "_part_bibliography";
+      comp_obj_heading_.node.marked_up_level       = "B";
+      comp_obj_heading_.node.heading_lev_markup    = 1;
+      comp_obj_heading_.node.heading_lev_collapsed = 1;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      the_bibliography_section                     ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "backmatter";
+      comp_obj_heading_.typeinfo.of_section        = "bibliography";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "Bibliography";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.tags.segment_anchor_tag    = "bibliography";
+      comp_obj_heading_.node.marked_up_level       = "1";
+      comp_obj_heading_.node.heading_lev_markup    = 4;
+      comp_obj_heading_.node.heading_lev_collapsed = 2;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      comp_obj_heading_.tags.anchor_tags           = ["bibliography"];
+      the_bibliography_section                     ~= comp_obj_heading_;
     } else {
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "empty";
-      comp_obj_heading_.of_section            = "empty";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "(skip) there is no Bibliography";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_heading_.obj_cite_number       = "";
-      comp_obj_heading_.obj_cite_number_off   = "";
-      comp_obj_heading_.obj_cite_number_type  = 0;
-      comp_obj_heading_.marked_up_level       = "B";
-      comp_obj_heading_.heading_lev_markup    = 1;
-      comp_obj_heading_.heading_lev_collapsed = 1;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      the_bibliography_section                ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "empty";
+      comp_obj_heading_.typeinfo.of_section        = "empty";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "(skip) there is no Bibliography";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_heading_.node.obj_cite_number       = "";
+      comp_obj_heading_.misc.obj_cite_number_off   = "";
+      comp_obj_heading_.misc.obj_cite_number_type  = 0;
+      comp_obj_heading_.node.marked_up_level       = "B";
+      comp_obj_heading_.node.heading_lev_markup    = 1;
+      comp_obj_heading_.node.heading_lev_collapsed = 1;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      the_bibliography_section                     ~= comp_obj_heading_;
     }
     string out_;
     foreach (entry; biblio_ordered) {
@@ -1150,21 +1150,21 @@ template SiSUdocAbstraction() {
         ((entry["place"].str.empty) ? "" : ", " ~ entry["place"].str),
         ((entry["url"].str.empty) ? "" : ", [" ~ entry["url"].str ~ "]"),
       );
-      comp_obj_para                       = comp_obj_para.init;
-      comp_obj_para.of_part               = "backmatter";
-      comp_obj_para.of_section            = "bibliography";
-      comp_obj_para.is_of                 = "para";
-      comp_obj_para.is_a                  = "bibliography";
-      comp_obj_para.text                  = out_.to!string.strip;
-      comp_obj_para.ocn                   = 0;
-      comp_obj_para.obj_cite_number       = "";
-      comp_obj_para.obj_cite_number_off   = "";
-      comp_obj_para.obj_cite_number_type  = 0;
-      comp_obj_para.indent_hang           = 0;
-      comp_obj_para.indent_base           = 1;
-      comp_obj_para.bullet                = bullet;
-      comp_obj_para.anchor_tags           = anchor_tags;
-      the_bibliography_section            ~= comp_obj_para;
+      comp_obj_para                           = comp_obj_para.init;
+      comp_obj_para.typeinfo.of_part          = "backmatter";
+      comp_obj_para.typeinfo.of_section       = "bibliography";
+      comp_obj_para.typeinfo.is_of            = "para";
+      comp_obj_para.typeinfo.is_a             = "bibliography";
+      comp_obj_para.text                      = out_.to!string.strip;
+      comp_obj_para.node.ocn                  = 0;
+      comp_obj_para.node.obj_cite_number      = "";
+      comp_obj_para.misc.obj_cite_number_off  = "";
+      comp_obj_para.misc.obj_cite_number_type = 0;
+      comp_obj_para.attrib.indent_hang        = 0;
+      comp_obj_para.attrib.indent_base        = 1;
+      comp_obj_para.attrib.bullet             = bullet;
+      comp_obj_para.tags.anchor_tags          = anchor_tags;
+      the_bibliography_section                ~= comp_obj_para;
     }
     debug(bibliosection) {
       foreach (o; the_bibliography_section) {
@@ -1188,23 +1188,23 @@ template SiSUdocAbstraction() {
       }
     }
     if (an_object["blurb_nugget"].length == 0) {
-      comp_obj_heading_                       = comp_obj_heading_.init;
-      comp_obj_heading_.of_part               = "empty";
-      comp_obj_heading_.of_section            = "empty";
-      comp_obj_heading_.is_of                 = "para";
-      comp_obj_heading_.is_a                  = "heading";
-      comp_obj_heading_.text                  = "(skip) there is no Blurb section";
-      comp_obj_heading_.ocn                   = 0;
-      comp_obj_para.obj_cite_number           = "";
-      comp_obj_para.obj_cite_number_off       = "";
-      comp_obj_para.obj_cite_number_type      = 0;
-      comp_obj_heading_.segment_anchor_tag    = "";
-      comp_obj_heading_.marked_up_level       = "B";
-      comp_obj_heading_.heading_lev_markup    = 1;
-      comp_obj_heading_.heading_lev_collapsed = 1;
-      comp_obj_heading_.parent_ocn            = 1;
-      comp_obj_heading_.parent_lev_markup     = 0;
-      the_blurb_section                       ~= comp_obj_heading_;
+      comp_obj_heading_                            = comp_obj_heading_.init;
+      comp_obj_heading_.typeinfo.of_part           = "empty";
+      comp_obj_heading_.typeinfo.of_section        = "empty";
+      comp_obj_heading_.typeinfo.is_of             = "para";
+      comp_obj_heading_.typeinfo.is_a              = "heading";
+      comp_obj_heading_.text                       = "(skip) there is no Blurb section";
+      comp_obj_heading_.node.ocn                   = 0;
+      comp_obj_para.node.obj_cite_number           = "";
+      comp_obj_para.misc.obj_cite_number_off       = "";
+      comp_obj_para.misc.obj_cite_number_type      = 0;
+      comp_obj_heading_.tags.segment_anchor_tag    = "";
+      comp_obj_heading_.node.marked_up_level       = "B";
+      comp_obj_heading_.node.heading_lev_markup    = 1;
+      comp_obj_heading_.node.heading_lev_collapsed = 1;
+      comp_obj_heading_.node.parent_ocn            = 1;
+      comp_obj_heading_.node.parent_lev_markup     = 0;
+      the_blurb_section                            ~= comp_obj_heading_;
     }
     debug(blurb) {
       foreach (blurb; the_blurb_section) {
@@ -1215,18 +1215,18 @@ template SiSUdocAbstraction() {
       "hang_position" : 1,
       "base_position" : 1,
     ];
-    comp_obj_toc                       = comp_obj_toc.init;
-    comp_obj_toc.of_part               = "frontmatter";
-    comp_obj_toc.of_section            = "toc";
-    comp_obj_toc.is_of                 = "para";
-    comp_obj_toc.is_a                  = "toc";
-    comp_obj_toc.ocn                   = 0;
-    comp_obj_toc.obj_cite_number       = "";
-    comp_obj_toc.obj_cite_number_off   = "";
-    comp_obj_toc.obj_cite_number_type  = 0;
-    comp_obj_toc.indent_hang           = indent["hang_position"];
-    comp_obj_toc.indent_base           = indent["base_position"];
-    comp_obj_toc.bullet                = false;
+    comp_obj_toc                           = comp_obj_toc.init;
+    comp_obj_toc.typeinfo.of_part          = "frontmatter";
+    comp_obj_toc.typeinfo.of_section       = "toc";
+    comp_obj_toc.typeinfo.is_of            = "para";
+    comp_obj_toc.typeinfo.is_a             = "toc";
+    comp_obj_toc.node.ocn                  = 0;
+    comp_obj_toc.node.obj_cite_number      = "";
+    comp_obj_toc.misc.obj_cite_number_off  = "";
+    comp_obj_toc.misc.obj_cite_number_type = 0;
+    comp_obj_toc.attrib.indent_hang        = indent["hang_position"];
+    comp_obj_toc.attrib.indent_base        = indent["base_position"];
+    comp_obj_toc.attrib.bullet             = false;
     if (the_endnotes_section.length > 1) {
       toc_txt_ = format(
         "{ %s }%s%s%s",
@@ -1237,7 +1237,7 @@ template SiSUdocAbstraction() {
       );
       toc_txt_= munge.url_links(toc_txt_);
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["seg"]    ~= comp_obj_toc;
     }
     if (the_glossary_section.length > 1) {
@@ -1250,7 +1250,7 @@ template SiSUdocAbstraction() {
       );
       toc_txt_= munge.url_links(toc_txt_);
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["seg"]    ~= comp_obj_toc;
       toc_txt_ = format(
         "{ %s }#%s",
@@ -1259,7 +1259,7 @@ template SiSUdocAbstraction() {
       );
       toc_txt_= munge.url_links(toc_txt_);
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["scroll"] ~= comp_obj_toc;
     }
     if (the_bibliography_section.length > 1){
@@ -1272,7 +1272,7 @@ template SiSUdocAbstraction() {
       );
       toc_txt_= munge.url_links(toc_txt_);
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["seg"]    ~= comp_obj_toc;
     
       toc_txt_ = format(
@@ -1282,7 +1282,7 @@ template SiSUdocAbstraction() {
       );
       toc_txt_= munge.url_links(toc_txt_);
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["scroll"] ~= comp_obj_toc;
     }
     if (the_bookindex_section["seg"].length > 1) {
@@ -1295,7 +1295,7 @@ template SiSUdocAbstraction() {
       );
       toc_txt_= munge.url_links(toc_txt_);
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["seg"]    ~= comp_obj_toc;
     }
     if (the_bookindex_section["scroll"].length > 1) {
@@ -1306,7 +1306,7 @@ template SiSUdocAbstraction() {
       );
       toc_txt_= munge.url_links(toc_txt_);
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["scroll"] ~= comp_obj_toc;
     }
     if (the_blurb_section.length > 1) {
@@ -1319,7 +1319,7 @@ template SiSUdocAbstraction() {
       );
       toc_txt_= munge.url_links(toc_txt_);
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       the_table_of_contents_section["seg"]    ~= comp_obj_toc;
       toc_txt_ = format(
         "{ %s }#%s",
@@ -1327,7 +1327,7 @@ template SiSUdocAbstraction() {
         "blurb",                  // _anchor_tag
       );
       toc_txt_= munge.url_links(toc_txt_);
-      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.has.inline_links           = true;
       comp_obj_toc.text                       = toc_txt_.to!string.strip;
       the_table_of_contents_section["scroll"] ~= comp_obj_toc;
     }
@@ -1338,7 +1338,7 @@ template SiSUdocAbstraction() {
         the_table_of_contents_section["seg"].length
       );
       foreach (toc_linked_heading; the_table_of_contents_section["seg"]) {
-        writeln(mkup.indent_by_spaces_provided(toc_linked_heading.indent_hang), toc_linked_heading.text);
+        writeln(mkup.indent_by_spaces_provided(toc_linked_heading.attrib.indent_hang), toc_linked_heading.text);
       }
     }
     debug(tocscroll) {
@@ -1348,7 +1348,7 @@ template SiSUdocAbstraction() {
         the_table_of_contents_section["seg"].length
       );
       foreach (toc_linked_heading; the_table_of_contents_section["scroll"]) {
-        writeln(mkup.indent_by_spaces_provided(toc_linked_heading.indent_hang), toc_linked_heading.text);
+        writeln(mkup.indent_by_spaces_provided(toc_linked_heading.attrib.indent_hang), toc_linked_heading.text);
       }
     }
     the_document_head_section ~= the_document_body_section[0];
@@ -1357,8 +1357,8 @@ template SiSUdocAbstraction() {
       html_segnames ~= "endnotes";
       html_segnames_ptr = html_segnames_ptr_cntr;
       foreach (ref section; the_endnotes_section) {
-        if (section.heading_lev_markup == 4) {
-          section.ptr_html_segnames = html_segnames_ptr;
+        if (section.node.heading_lev_markup == 4) {
+          section.ptr.html_segnames = html_segnames_ptr;
           break;
         }
       }
@@ -1368,8 +1368,8 @@ template SiSUdocAbstraction() {
       html_segnames ~= "glossary";
       html_segnames_ptr = html_segnames_ptr_cntr;
       foreach (ref section; the_glossary_section) {
-        if (section.heading_lev_markup == 4) {
-          section.ptr_html_segnames = html_segnames_ptr;
+        if (section.node.heading_lev_markup == 4) {
+          section.ptr.html_segnames = html_segnames_ptr;
           break;
         }
       }
@@ -1379,8 +1379,8 @@ template SiSUdocAbstraction() {
       html_segnames ~= "bibliography";
       html_segnames_ptr = html_segnames_ptr_cntr;
       foreach (ref section; the_bibliography_section) {
-        if (section.heading_lev_markup == 4) {
-          section.ptr_html_segnames = html_segnames_ptr;
+        if (section.node.heading_lev_markup == 4) {
+          section.ptr.html_segnames = html_segnames_ptr;
           break;
         }
       }
@@ -1390,14 +1390,14 @@ template SiSUdocAbstraction() {
       html_segnames ~= "bookindex";
       html_segnames_ptr = html_segnames_ptr_cntr;
       foreach (ref section; the_bookindex_section["scroll"]) {
-        if (section.heading_lev_markup == 4) {
-          section.ptr_html_segnames = html_segnames_ptr;
+        if (section.node.heading_lev_markup == 4) {
+          section.ptr.html_segnames = html_segnames_ptr;
           break;
         }
       }
       foreach (ref section; the_bookindex_section["seg"]) {
-        if (section.heading_lev_markup == 4) {
-          section.ptr_html_segnames = html_segnames_ptr;
+        if (section.node.heading_lev_markup == 4) {
+          section.ptr.html_segnames = html_segnames_ptr;
           break;
         }
       }
@@ -1407,8 +1407,8 @@ template SiSUdocAbstraction() {
       html_segnames ~= "blurb";
       html_segnames_ptr = html_segnames_ptr_cntr;
       foreach (ref section; the_blurb_section) {
-        if (section.heading_lev_markup == 4) {
-          section.ptr_html_segnames = html_segnames_ptr;
+        if (section.node.heading_lev_markup == 4) {
+          section.ptr.html_segnames = html_segnames_ptr;
           break;
         }
       }
@@ -1424,7 +1424,7 @@ template SiSUdocAbstraction() {
     }
     string[] segnames_0_4;
     auto _image_dimensions(M,O)(M manifest_matter, O obj) {
-      if (obj.contains_image_without_dimensions) {
+      if (obj.has.contains_image_without_dimensions) {
         import std.math;
         import imageformats;
         int w, h, chans;
@@ -1458,21 +1458,21 @@ template SiSUdocAbstraction() {
       return obj;
     }
     foreach (ref obj; the_document_head_section) {
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         debug(dom) {
           writeln(obj.text);
         }
-        if (obj.heading_lev_markup <= 4) {
-          segnames_0_4 ~= obj.segment_anchor_tag;
+        if (obj.node.heading_lev_markup <= 4) {
+          segnames_0_4 ~= obj.tags.segment_anchor_tag;
         }
-        if (obj.heading_lev_markup == 0) {
+        if (obj.node.heading_lev_markup == 0) {
           /+ TODO second hit (of two) with same assertion failure, check, fix and reinstate
-          assert( obj.ocn == 1,
-            "Title OCN should be 1 not: " ~ obj.ocn.to!string); // bug introduced 0.18.1
+          assert( obj.node.ocn == 1,
+            "Title OCN should be 1 not: " ~ obj.node.ocn.to!string); // bug introduced 0.18.1
           +/
-          obj.ocn = 1;
-          obj.obj_cite_number = "1";
-          obj.obj_cite_number_type = OCNtype.ocn;
+          obj.node.ocn = 1;
+          obj.node.obj_cite_number = "1";
+          obj.misc.obj_cite_number_type = OCNtype.ocn;
         }
         /+ dom structure (marked up & collapsed) +/
         if ((opt_action.html)
@@ -1482,8 +1482,8 @@ template SiSUdocAbstraction() {
         || (opt_action.sqlite_discrete)
         || (opt_action.sqlite_update)
         || (opt_action.postgresql)) {
-          obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-          obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+          obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+          obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
         }
         obj = obj_heading_ancestors(obj, lv_ancestors_txt);
       }
@@ -1493,13 +1493,13 @@ template SiSUdocAbstraction() {
       dom_markedup_buffer = dom_markedup.dup;
       dom_collapsed_buffer = dom_collapsed.dup;
       foreach (ref obj; the_table_of_contents_section["scroll"]) {
-        if (obj.is_a == "heading") {
-          if (obj.heading_lev_markup <= 4) {
-            segnames_0_4 ~= obj.segment_anchor_tag;
-            if (obj.heading_lev_markup == 4) {
-              obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
-              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-              obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+        if (obj.typeinfo.is_a == "heading") {
+          if (obj.node.heading_lev_markup <= 4) {
+            segnames_0_4 ~= obj.tags.segment_anchor_tag;
+            if (obj.node.heading_lev_markup == 4) {
+              obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
+              assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+              obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
             }
           }
           /+ dom structure (marked up & collapsed) +/
@@ -1510,8 +1510,8 @@ template SiSUdocAbstraction() {
           || (opt_action.sqlite_discrete)
           || (opt_action.sqlite_update)
           || (opt_action.postgresql)) {
-            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
           }
           obj = obj_heading_ancestors(obj, lv_ancestors_txt);
         }
@@ -1520,24 +1520,24 @@ template SiSUdocAbstraction() {
       dom_markedup = dom_markedup_buffer.dup;
       dom_collapsed = dom_collapsed_buffer.dup;
       foreach (ref obj; the_table_of_contents_section["seg"]) {
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           debug(dom) {
             writeln(obj.text);
           }
-          if (obj.heading_lev_markup <= 4) {
-            segnames_0_4 ~= obj.segment_anchor_tag;
-            if (obj.heading_lev_markup == 4) {
-              obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
-              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-              obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+          if (obj.node.heading_lev_markup <= 4) {
+            segnames_0_4 ~= obj.tags.segment_anchor_tag;
+            if (obj.node.heading_lev_markup == 4) {
+              obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
+              assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+              obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
             }
           }
           if ((opt_action.html)
           || (opt_action.html_scroll)
           || (opt_action.html_seg)
           || (opt_action.epub)) {
-            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
           }
           obj = obj_heading_ancestors(obj, lv_ancestors_txt);
         }
@@ -1546,20 +1546,20 @@ template SiSUdocAbstraction() {
     /+ multiple 1~ levels, loop through document body +/
     if (the_document_body_section.length > 1) {
       foreach (ref obj; the_document_body_section) {
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           debug(dom) {
             writeln(obj.text);
           }
-          if (obj.heading_lev_markup <= 4) {
-            segnames_0_4 ~= obj.segment_anchor_tag;
-            if (obj.heading_lev_markup == 4) {
-              obj.lev4_subtoc = lev4_subtoc[obj.segment_anchor_tag];
-              obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-              if (html_segnames.length > obj.ptr_html_segnames + 1) {
-                obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+          if (obj.node.heading_lev_markup <= 4) {
+            segnames_0_4 ~= obj.tags.segment_anchor_tag;
+            if (obj.node.heading_lev_markup == 4) {
+              obj.tags.lev4_subtoc = lev4_subtoc[obj.tags.segment_anchor_tag];
+              obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+              if (html_segnames.length > obj.ptr.html_segnames + 1) {
+                obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
               }
-              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-              obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+              assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+              obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
             }
           }
           /+ dom structure (marked up & collapsed) +/
@@ -1570,11 +1570,11 @@ template SiSUdocAbstraction() {
           || (opt_action.sqlite_discrete)
           || (opt_action.sqlite_update)
           || (opt_action.postgresql)) {
-            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
           }
           obj = obj_heading_ancestors(obj, lv_ancestors_txt);
-        } else if (obj.is_a == "para") {
+        } else if (obj.typeinfo.is_a == "para") {
            _images ~= extract_images(obj.text);
            obj = _image_dimensions(manifest_matter, obj);
         }
@@ -1588,22 +1588,22 @@ template SiSUdocAbstraction() {
       dom_markedup = dom_markedup_buffer.dup;
       dom_collapsed = dom_collapsed_buffer.dup;
       foreach (ref obj; the_endnotes_section) {
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           debug(dom) {
             writeln(obj.text);
           }
           obj_cite_digits = ocn_emit(OCNstatus.on);
-          obj.ocn = obj_cite_digits.digit;
-          obj.obj_cite_number = obj_cite_digits.on.to!string;
-          if (obj.heading_lev_markup <= 4) {
-            segnames_0_4 ~= obj.segment_anchor_tag;
-            if (obj.heading_lev_markup == 4) {
-              obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-              if (html_segnames.length > obj.ptr_html_segnames + 1) {
-                obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+          obj.node.ocn = obj_cite_digits.digit;
+          obj.node.obj_cite_number = obj_cite_digits.on.to!string;
+          if (obj.node.heading_lev_markup <= 4) {
+            segnames_0_4 ~= obj.tags.segment_anchor_tag;
+            if (obj.node.heading_lev_markup == 4) {
+              obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+              if (html_segnames.length > obj.ptr.html_segnames + 1) {
+                obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
               }
-              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-              obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+              assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+              obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
             }
           }
           /+ dom structure (marked up & collapsed) +/
@@ -1614,8 +1614,8 @@ template SiSUdocAbstraction() {
           || (opt_action.sqlite_discrete)
           || (opt_action.sqlite_update)
           || (opt_action.postgresql)) {
-            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
           }
           obj = obj_heading_ancestors(obj, lv_ancestors_txt);
         }
@@ -1624,22 +1624,22 @@ template SiSUdocAbstraction() {
     /+ optional only one 1~ level +/
     if (the_glossary_section.length > 1) {
       foreach (ref obj; the_glossary_section) {
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           debug(dom) {
             writeln(obj.text);
           }
           obj_cite_digits = ocn_emit(OCNstatus.on);
-          obj.ocn = obj_cite_digits.digit;
-          obj.obj_cite_number = obj_cite_digits.on.to!string;
-          if (obj.heading_lev_markup <= 4) {
-            segnames_0_4 ~= obj.segment_anchor_tag;
-            if (obj.heading_lev_markup == 4) {
-              obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-              if (html_segnames.length > obj.ptr_html_segnames + 1) {
-                obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+          obj.node.ocn = obj_cite_digits.digit;
+          obj.node.obj_cite_number = obj_cite_digits.on.to!string;
+          if (obj.node.heading_lev_markup <= 4) {
+            segnames_0_4 ~= obj.tags.segment_anchor_tag;
+            if (obj.node.heading_lev_markup == 4) {
+              obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+              if (html_segnames.length > obj.ptr.html_segnames + 1) {
+                obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
               }
-              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-              obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+              assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+              obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
             }
           }
           /+ dom structure (marked up & collapsed) +/
@@ -1650,36 +1650,36 @@ template SiSUdocAbstraction() {
           || (opt_action.sqlite_discrete)
           || (opt_action.sqlite_update)
           || (opt_action.postgresql)) {
-            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
           }
           obj = obj_heading_ancestors(obj, lv_ancestors_txt);
-        } else if (obj.is_a == "glossary") {
+        } else if (obj.typeinfo.is_a == "glossary") {
           obj_cite_digits = ocn_emit(OCNstatus.on);
-          obj.ocn = obj_cite_digits.digit;
-          obj.obj_cite_number = obj_cite_digits.on.to!string;
+          obj.node.ocn = obj_cite_digits.digit;
+          obj.node.obj_cite_number = obj_cite_digits.on.to!string;
         }
       }
     }
     /+ optional only one 1~ level +/
     if (the_bibliography_section.length > 1) {
       foreach (ref obj; the_bibliography_section) {
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           debug(dom) {
             writeln(obj.text);
           }
           obj_cite_digits = ocn_emit(OCNstatus.on);
-          obj.ocn = obj_cite_digits.digit;
-          obj.obj_cite_number = obj_cite_digits.on.to!string; // check
-          if (obj.heading_lev_markup <= 4) {
-            segnames_0_4 ~= obj.segment_anchor_tag;
-            if (obj.heading_lev_markup == 4) {
-              obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-              if (html_segnames.length > obj.ptr_html_segnames + 1) {
-                obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+          obj.node.ocn = obj_cite_digits.digit;
+          obj.node.obj_cite_number = obj_cite_digits.on.to!string; // check
+          if (obj.node.heading_lev_markup <= 4) {
+            segnames_0_4 ~= obj.tags.segment_anchor_tag;
+            if (obj.node.heading_lev_markup == 4) {
+              obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+              if (html_segnames.length > obj.ptr.html_segnames + 1) {
+                obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
               }
-              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-              obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+              assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+              obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
             }
           }
           /+ dom structure (marked up & collapsed) +/
@@ -1690,14 +1690,14 @@ template SiSUdocAbstraction() {
           || (opt_action.sqlite_discrete)
           || (opt_action.sqlite_update)
           || (opt_action.postgresql)) {
-            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
           }
           obj = obj_heading_ancestors(obj, lv_ancestors_txt);
-        } else if (obj.is_a == "bibliography") {
+        } else if (obj.typeinfo.is_a == "bibliography") {
           obj_cite_digits = ocn_emit(OCNstatus.on);
-          obj.ocn = obj_cite_digits.on;
-          obj.obj_cite_number = obj_cite_digits.on.to!string;
+          obj.node.ocn = obj_cite_digits.on;
+          obj.node.obj_cite_number = obj_cite_digits.on.to!string;
         }
       }
     }
@@ -1710,21 +1710,21 @@ template SiSUdocAbstraction() {
       dom_markedup_buffer = dom_markedup.dup;
       dom_collapsed_buffer = dom_collapsed.dup;
       foreach (ref obj; the_bookindex_section["scroll"]) {
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           debug(dom) {
           }
           obj_cite_digits = ocn_emit(OCNstatus.on);
-          obj.ocn = obj_cite_digits.on;
-          obj.obj_cite_number = obj_cite_digits.on.to!string;
-          if (obj.heading_lev_markup <= 4) {
-            segnames_0_4 ~= obj.segment_anchor_tag;
-            if (obj.heading_lev_markup == 4) {
-              obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-              if (html_segnames.length > obj.ptr_html_segnames + 1) {
-                obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+          obj.node.ocn = obj_cite_digits.on;
+          obj.node.obj_cite_number = obj_cite_digits.on.to!string;
+          if (obj.node.heading_lev_markup <= 4) {
+            segnames_0_4 ~= obj.tags.segment_anchor_tag;
+            if (obj.node.heading_lev_markup == 4) {
+              obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+              if (html_segnames.length > obj.ptr.html_segnames + 1) {
+                obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
               }
-              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-              obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+              assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+              obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
             }
           }
           /+ dom structure (marked up & collapsed) +/
@@ -1735,36 +1735,36 @@ template SiSUdocAbstraction() {
           || (opt_action.sqlite_discrete)
           || (opt_action.sqlite_update)
           || (opt_action.postgresql)) {
-            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
           }
           obj = obj_heading_ancestors(obj, lv_ancestors_txt);
-        } else if (obj.is_a == "bookindex") {
+        } else if (obj.typeinfo.is_a == "bookindex") {
           obj_cite_digits = ocn_emit(OCNstatus.bkidx);
-          obj.ocn = obj_cite_digits.digit;
-          obj.obj_cite_number_bkidx = obj_cite_digits.bkidx.to!string;
-          obj.obj_cite_number_type = OCNtype.bkidx;
+          obj.node.ocn = obj_cite_digits.digit;
+          obj.misc.obj_cite_number_bkidx = obj_cite_digits.bkidx.to!string;
+          obj.misc.obj_cite_number_type = OCNtype.bkidx;
         }
       }
       /+ seg +/
       dom_markedup = dom_markedup_buffer.dup;
       dom_collapsed = dom_collapsed_buffer.dup;
       foreach (ref obj; the_bookindex_section["seg"]) {
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           debug(dom) {
             writeln(obj.text);
           }
-          obj.ocn = ++ocn_;
-          obj.obj_cite_number = obj.ocn.to!string;
-          if (obj.heading_lev_markup <= 4) {
-            segnames_0_4 ~= obj.segment_anchor_tag;
-            if (obj.heading_lev_markup == 4) {
-              obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-              if (html_segnames.length > obj.ptr_html_segnames + 1) {
-                obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+          obj.node.ocn = ++ocn_;
+          obj.node.obj_cite_number = obj.node.ocn.to!string;
+          if (obj.node.heading_lev_markup <= 4) {
+            segnames_0_4 ~= obj.tags.segment_anchor_tag;
+            if (obj.node.heading_lev_markup == 4) {
+              obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+              if (html_segnames.length > obj.ptr.html_segnames + 1) {
+                obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
               }
-              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-              obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+              assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+              obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
             }
           }
           /+ dom structure (marked up & collapsed) +/
@@ -1775,14 +1775,14 @@ template SiSUdocAbstraction() {
           || (opt_action.sqlite_discrete)
           || (opt_action.sqlite_update)
           || (opt_action.postgresql)) {
-            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
           }
           obj = obj_heading_ancestors(obj, lv_ancestors_txt);
-        } else if (obj.is_a == "bookindex") {
+        } else if (obj.typeinfo.is_a == "bookindex") {
           ocn_bidx_ = ++ocn_bkidx_;
-          obj.obj_cite_number_bkidx = ocn_bidx_.to!string; // FIX need to distinguish from regular ocn
-          obj.obj_cite_number_type = OCNtype.bkidx;
+          obj.misc.obj_cite_number_bkidx = ocn_bidx_.to!string; // FIX need to distinguish from regular ocn
+          obj.misc.obj_cite_number_type = OCNtype.bkidx;
         }
       }
       /+ TODO assert failure, reinstate
@@ -1793,22 +1793,22 @@ template SiSUdocAbstraction() {
     /+ optional only one 1~ level +/
     if (the_blurb_section.length > 1) {
       foreach (ref obj; the_blurb_section) {
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           debug(dom) {
             writeln(obj.text);
           }
           obj_cite_digits = ocn_emit(OCNstatus.on);
-          obj.ocn = obj_cite_digits.on;
-          obj.obj_cite_number = obj_cite_digits.on.to!string;
-          if (obj.heading_lev_markup <= 4) {
-            segnames_0_4 ~= obj.segment_anchor_tag;
-            if (obj.heading_lev_markup == 4) {
-              obj.segname_prev = html_segnames[obj.ptr_html_segnames - 1];
-              if (html_segnames.length > obj.ptr_html_segnames + 1) {
-                obj.segname_next = html_segnames[obj.ptr_html_segnames + 1];
+          obj.node.ocn = obj_cite_digits.on;
+          obj.node.obj_cite_number = obj_cite_digits.on.to!string;
+          if (obj.node.heading_lev_markup <= 4) {
+            segnames_0_4 ~= obj.tags.segment_anchor_tag;
+            if (obj.node.heading_lev_markup == 4) {
+              obj.tags.segname_prev = html_segnames[obj.ptr.html_segnames - 1];
+              if (html_segnames.length > obj.ptr.html_segnames + 1) {
+                obj.tags.segname_next = html_segnames[obj.ptr.html_segnames + 1];
               }
-              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames],
-              obj.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr_html_segnames]);
+              assert(obj.tags.segment_anchor_tag == html_segnames[obj.ptr.html_segnames],
+              obj.tags.segment_anchor_tag ~ "!=" ~ html_segnames[obj.ptr.html_segnames]);
             }
           }
           /+ dom structure (marked up & collapsed) +/
@@ -1819,44 +1819,44 @@ template SiSUdocAbstraction() {
           || (opt_action.sqlite_discrete)
           || (opt_action.sqlite_update)
           || (opt_action.postgresql)) {
-            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.heading_lev_markup);
-            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.heading_lev_collapsed);
+            obj = obj_dom_structure_set_markup_tags(obj, dom_markedup, obj.node.heading_lev_markup);
+            obj = obj_dom_set_collapsed_tags(obj, dom_collapsed, obj.node.heading_lev_collapsed);
           }
           obj = obj_heading_ancestors(obj, lv_ancestors_txt);
-        } else if (obj.is_a == "blurb") {
+        } else if (obj.typeinfo.is_a == "blurb") {
           obj_cite_digits = ocn_emit(OCNstatus.off);
-          obj.obj_cite_number_off  = obj_cite_digits.off.to!string;
-          obj.obj_cite_number_type = OCNtype.non;
+          obj.misc.obj_cite_number_off  = obj_cite_digits.off.to!string;
+          obj.misc.obj_cite_number_type = OCNtype.non;
         }
       }
     }
       /+ TODO
         - note create/insert heading object sole purpose eof close all open tags
           sort out:
-          - obj.dom_markedup = dom_markedup;
-          - obj.dom_collapsed = dom_collapsed;
+          - obj.node.dom_markedup = dom_markedup;
+          - obj.node.dom_collapsed = dom_collapsed;
       +/
-    comp_obj_heading_                       = comp_obj_heading_.init;
-    comp_obj_heading_.of_part               = "empty";
-    comp_obj_heading_.of_section            = "empty";
-    comp_obj_heading_.is_of                 = "para";
-    comp_obj_heading_.is_a                  = "heading";
-    comp_obj_heading_.ocn                   = 0;
-    comp_obj_para.obj_cite_number           = "";
-    comp_obj_para.obj_cite_number_off       = "";
-    comp_obj_para.obj_cite_number_type      = 0;
-    comp_obj_heading_.segment_anchor_tag    = "";
-    comp_obj_heading_.marked_up_level       = "";
-    comp_obj_heading_.heading_lev_markup    = 9;
-    comp_obj_heading_.heading_lev_collapsed = 9;
-    comp_obj_heading_.parent_ocn            = 0;
-    comp_obj_heading_.parent_lev_markup     = 0;
-    comp_obj_heading_.dom_markedup          = dom_markedup.dup;
-    comp_obj_heading_.dom_collapsed         = dom_collapsed.dup;
+    comp_obj_heading_                            = comp_obj_heading_.init;
+    comp_obj_heading_.typeinfo.of_part           = "empty";
+    comp_obj_heading_.typeinfo.of_section        = "empty";
+    comp_obj_heading_.typeinfo.is_of             = "para";
+    comp_obj_heading_.typeinfo.is_a              = "heading";
+    comp_obj_heading_.node.ocn                   = 0;
+    comp_obj_para.node.obj_cite_number           = "";
+    comp_obj_para.misc.obj_cite_number_off       = "";
+    comp_obj_para.misc.obj_cite_number_type      = 0;
+    comp_obj_heading_.tags.segment_anchor_tag    = "";
+    comp_obj_heading_.node.marked_up_level       = "";
+    comp_obj_heading_.node.heading_lev_markup    = 9;
+    comp_obj_heading_.node.heading_lev_collapsed = 9;
+    comp_obj_heading_.node.parent_ocn            = 0;
+    comp_obj_heading_.node.parent_lev_markup     = 0;
+    comp_obj_heading_.node.dom_markedup          = dom_markedup.dup;
+    comp_obj_heading_.node.dom_collapsed         = dom_collapsed.dup;
     comp_obj_heading_ = obj_dom_structure_set_markup_tags(comp_obj_heading_, dom_markedup, 0);
     comp_obj_heading_ = obj_dom_set_collapsed_tags(comp_obj_heading_, dom_collapsed, 0);
     comp_obj_heading_ = obj_heading_ancestors(comp_obj_heading_, lv_ancestors_txt);
-    // the_dom_tail_section                    ~= comp_obj_heading_; // remove tail for now, decide on later
+    // the_dom_tail_section                      ~= comp_obj_heading_; // remove tail for now, decide on later
     auto document_the = [
       "head":             the_document_head_section,
       "toc_seg":          the_table_of_contents_section["seg"],
@@ -1924,16 +1924,16 @@ template SiSUdocAbstraction() {
     destroy(html_segnames);
     destroy(bookindex_unordered_hashes);
     destroy(an_object);
-    biblio_arr_json = [];
-    obj_cite_digits=ocn_emit(OCNstatus.reset);
-    obj_cite_digit_=0;
-    html_segnames_ptr=0;
-    html_segnames_ptr_cntr=0;
-    content_non_header = "8";
-    dom_markedup = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
-    dom_markedup_buffer = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
-    dom_collapsed = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
-    dom_collapsed_buffer = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
+    obj_cite_digits        = ocn_emit(OCNstatus.reset);
+    biblio_arr_json        = [];
+    obj_cite_digit_        = 0;
+    html_segnames_ptr      = 0;
+    html_segnames_ptr_cntr = 0;
+    content_non_header     = "8";
+    dom_markedup           = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
+    dom_markedup_buffer    = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
+    dom_collapsed          = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
+    dom_collapsed_buffer   = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
     auto t = tuple(
       document_the,
       sequenced_document_keys,
@@ -2414,19 +2414,19 @@ template SiSUdocAbstraction() {
             an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
             anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
             comp_obj_block                            = comp_obj_block.init;
-            comp_obj_block.of_part                    = "body";
-            comp_obj_block.of_section                 = "body";
-            comp_obj_block.is_of                      = "block";
-            comp_obj_block.is_a                       = "verse";
-            comp_obj_block.ocn                        = obj_cite_digits.on;
-            comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-            comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-            comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-            comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+            comp_obj_block.typeinfo.of_part           = "body";
+            comp_obj_block.typeinfo.of_section        = "body";
+            comp_obj_block.typeinfo.is_of             = "block";
+            comp_obj_block.typeinfo.is_a              = "verse";
+            comp_obj_block.node.ocn                   = obj_cite_digits.on;
+            comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+            comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+            comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+            comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
             comp_obj_block.text                       = an_object["substantive"];
-            comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-            comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-            comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+            comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+            comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+            comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
             the_document_body_section                 ~= comp_obj_block;
           }
           object_reset(an_object);
@@ -2472,19 +2472,19 @@ template SiSUdocAbstraction() {
           an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
           anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
           comp_obj_block                            = comp_obj_block.init;
-          comp_obj_block.of_part                    = "body";
-          comp_obj_block.of_section                 = "body";
-          comp_obj_block.is_of                      = "block";
-          comp_obj_block.is_a                       = "verse";
-          comp_obj_block.ocn                        = obj_cite_digits.on;
-          comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-          comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-          comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-          comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+          comp_obj_block.typeinfo.of_part           = "body";
+          comp_obj_block.typeinfo.of_section        = "body";
+          comp_obj_block.typeinfo.is_of             = "block";
+          comp_obj_block.typeinfo.is_a              = "verse";
+          comp_obj_block.node.ocn                   = obj_cite_digits.on;
+          comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+          comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+          comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+          comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
           comp_obj_block.text                       = an_object["substantive"];
-          comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-          comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-          comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+          comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+          comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+          comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
           the_document_body_section                 ~= comp_obj_block;
           object_reset(an_object);
           processing.remove("verse");
@@ -2515,19 +2515,19 @@ template SiSUdocAbstraction() {
           an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
           anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
           comp_obj_block                            = comp_obj_block.init;
-          comp_obj_block.of_part                    = "body";
-          comp_obj_block.of_section                 = "body";
-          comp_obj_block.is_of                      = "block";
-          comp_obj_block.is_a                       = "verse";
-          comp_obj_block.ocn                        = obj_cite_digits.on;
-          comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-          comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-          comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-          comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+          comp_obj_block.typeinfo.of_part           = "body";
+          comp_obj_block.typeinfo.of_section        = "body";
+          comp_obj_block.typeinfo.is_of             = "block";
+          comp_obj_block.typeinfo.is_a              = "verse";
+          comp_obj_block.node.ocn                   = obj_cite_digits.on;
+          comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+          comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+          comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+          comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
           comp_obj_block.text                       = an_object["substantive"];
-          comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-          comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-          comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+          comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+          comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+          comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
           the_document_body_section                 ~= comp_obj_block;
           obj_cite_number_poem["end"]               = obj_cite_digits.on.to!string;
           object_reset(an_object);
@@ -2573,19 +2573,19 @@ template SiSUdocAbstraction() {
           an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
           anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
           comp_obj_block                            = comp_obj_block.init;
-          comp_obj_block.of_part                    = "body";
-          comp_obj_block.of_section                 = "body";
-          comp_obj_block.is_of                      = "block";
-          comp_obj_block.is_a                       = "verse";
-          comp_obj_block.ocn                        = obj_cite_digits.on;
-          comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-          comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-          comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-          comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+          comp_obj_block.typeinfo.of_part           = "body";
+          comp_obj_block.typeinfo.of_section        = "body";
+          comp_obj_block.typeinfo.is_of             = "block";
+          comp_obj_block.typeinfo.is_a              = "verse";
+          comp_obj_block.node.ocn                   = obj_cite_digits.on;
+          comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+          comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+          comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+          comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
           comp_obj_block.text                       = an_object["substantive"];
-          comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-          comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-          comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+          comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+          comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+          comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
           the_document_body_section                 ~= comp_obj_block;
           object_reset(an_object);
           processing.remove("verse");
@@ -2872,15 +2872,15 @@ template SiSUdocAbstraction() {
       an_object["is"] = "table";
       auto substantive_obj_misc_tuple
         = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, "body_nugget", conf_make_meta);
-      an_object["substantive"]             = substantive_obj_misc_tuple[sObj.content];
-      comp_obj_block.ocn                   = obj_cite_digits.on;
-      comp_obj_block.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-      comp_obj_block.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-      comp_obj_block.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-      comp_obj_block.obj_cite_number_type  = obj_cite_digits.type;
-      comp_obj_block                       = table_instructions(comp_obj_block, an_object["table_head"]);
-      comp_obj_block                       = table_substantive_munge_special(comp_obj_block, an_object["substantive"]);
-      the_document_body_section            ~= comp_obj_block;
+      an_object["substantive"]                  = substantive_obj_misc_tuple[sObj.content];
+      comp_obj_block.node.ocn                   = obj_cite_digits.on;
+      comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+      comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+      comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+      comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
+      comp_obj_block                            = table_instructions(comp_obj_block, an_object["table_head"]);
+      comp_obj_block                            = table_substantive_munge_special(comp_obj_block, an_object["substantive"]);
+      the_document_body_section                 ~= comp_obj_block;
       object_reset(an_object);
       processing.remove("verse");
       ++cntr;
@@ -2933,19 +2933,19 @@ template SiSUdocAbstraction() {
       an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
       anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
       comp_obj_block                            = comp_obj_block.init;
-      comp_obj_block.of_part                    = "body";
-      comp_obj_block.of_section                 = "body";
-      comp_obj_block.is_of                      = "block";
-      comp_obj_block.is_a                       = "quote";
-      comp_obj_block.ocn                        = obj_cite_digits.on;
-      comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-      comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-      comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-      comp_obj_block.obj_cite_number_type       = obj_cite_digit_type;
+      comp_obj_block.typeinfo.of_part           = "body";
+      comp_obj_block.typeinfo.of_section        = "body";
+      comp_obj_block.typeinfo.is_of             = "block";
+      comp_obj_block.typeinfo.is_a              = "quote";
+      comp_obj_block.node.ocn                   = obj_cite_digits.on;
+      comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+      comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+      comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+      comp_obj_block.misc.obj_cite_number_type  = obj_cite_digit_type;
       comp_obj_block.text                       = an_object["substantive"];
-      comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-      comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-      comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+      comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+      comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+      comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
       the_document_body_section                 ~= comp_obj_block;
       obj_type_status["blocks"]                 = TriState.off;
       obj_type_status["quote"]                  = TriState.off;
@@ -2977,19 +2977,19 @@ template SiSUdocAbstraction() {
       an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
       anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
       comp_obj_block                            = comp_obj_block.init;
-      comp_obj_block.of_part                    = "body";
-      comp_obj_block.of_section                 = "body";
-      comp_obj_block.is_of                      = "block";
-      comp_obj_block.is_a                       = "group";
-      comp_obj_block.ocn                        = obj_cite_digits.on;
-      comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-      comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-      comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-      comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+      comp_obj_block.typeinfo.of_part           = "body";
+      comp_obj_block.typeinfo.of_section        = "body";
+      comp_obj_block.typeinfo.is_of             = "block";
+      comp_obj_block.typeinfo.is_a              = "group";
+      comp_obj_block.node.ocn                   = obj_cite_digits.on;
+      comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+      comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+      comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+      comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
       comp_obj_block.text                       = an_object["substantive"];
-      comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-      comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-      comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+      comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+      comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+      comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
       the_document_body_section                 ~= comp_obj_block;
       obj_type_status["blocks"]                 = TriState.off;
       obj_type_status["group"]                  = TriState.off;
@@ -3020,19 +3020,19 @@ template SiSUdocAbstraction() {
         = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta);
       an_object["substantive"]                  = substantive_obj_misc_tuple[sObj.content];
       comp_obj_block                            = comp_obj_block.init;
-      comp_obj_block.of_part                    = "body";
-      comp_obj_block.of_section                 = "body";
-      comp_obj_block.is_of                      = "block";
-      comp_obj_block.is_a                       = "block";
-      comp_obj_block.ocn                        = obj_cite_digits.on;
-      comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-      comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-      comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-      comp_obj_block.obj_cite_number_type       = obj_cite_digit_type;
+      comp_obj_block.typeinfo.of_part           = "body";
+      comp_obj_block.typeinfo.of_section        = "body";
+      comp_obj_block.typeinfo.is_of             = "block";
+      comp_obj_block.typeinfo.is_a              = "block";
+      comp_obj_block.node.ocn                   = obj_cite_digits.on;
+      comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+      comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+      comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+      comp_obj_block.misc.obj_cite_number_type  = obj_cite_digit_type;
       comp_obj_block.text                       = an_object["substantive"];
-      comp_obj_block.inline_notes_reg           = substantive_obj_misc_tuple[sObj.notes_reg];
-      comp_obj_block.inline_notes_star          = substantive_obj_misc_tuple[sObj.notes_star];
-      comp_obj_block.inline_links               = substantive_obj_misc_tuple[sObj.links];
+      comp_obj_block.has.inline_notes_reg       = substantive_obj_misc_tuple[sObj.notes_reg];
+      comp_obj_block.has.inline_notes_star      = substantive_obj_misc_tuple[sObj.notes_star];
+      comp_obj_block.has.inline_links           = substantive_obj_misc_tuple[sObj.links];
       the_document_body_section                 ~= comp_obj_block;
       obj_type_status["blocks"]                 = TriState.off;
       obj_type_status["block"]                  = TriState.off;
@@ -3058,20 +3058,20 @@ template SiSUdocAbstraction() {
           heading_ptr-1,
           an_object["is"]
         );
-      comp_obj_poem_ocn                         = comp_obj_poem_ocn.init;
-      comp_obj_poem_ocn.of_part                 = "body";
-      comp_obj_poem_ocn.of_section              = "body";
-      comp_obj_poem_ocn.is_of                   = "block";
-      comp_obj_poem_ocn.is_a                    = "poem";
-      comp_obj_poem_ocn.ocn                     = obj_cite_digits.on;
-      comp_obj_poem_ocn.obj_cite_number         = (obj_cite_number_poem["start"] ~ "..." ~ obj_cite_number_poem["end"]);
-      comp_obj_poem_ocn.obj_cite_number_off     = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string; //
-      comp_obj_poem_ocn.obj_cite_number_bkidx   = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string; //
-      comp_obj_poem_ocn.obj_cite_number_type    = obj_cite_digits.type;
-      comp_obj_poem_ocn.text                    = "";
-      the_document_body_section                 ~= comp_obj_poem_ocn;
-      obj_type_status["blocks"]                 = TriState.off;
-      obj_type_status["poem"]                   = TriState.off;
+      comp_obj_poem_ocn                            = comp_obj_poem_ocn.init;
+      comp_obj_poem_ocn.typeinfo.of_part           = "body";
+      comp_obj_poem_ocn.typeinfo.of_section        = "body";
+      comp_obj_poem_ocn.typeinfo.is_of             = "block";
+      comp_obj_poem_ocn.typeinfo.is_a              = "poem";
+      comp_obj_poem_ocn.node.ocn                   = obj_cite_digits.on;
+      comp_obj_poem_ocn.node.obj_cite_number       = (obj_cite_number_poem["start"] ~ "..." ~ obj_cite_number_poem["end"]);
+      comp_obj_poem_ocn.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string; //
+      comp_obj_poem_ocn.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string; //
+      comp_obj_poem_ocn.misc.obj_cite_number_type  = obj_cite_digits.type;
+      comp_obj_poem_ocn.text                        = "";
+      the_document_body_section                     ~= comp_obj_poem_ocn;
+      obj_type_status["blocks"]                     = TriState.off;
+      obj_type_status["poem"]                       = TriState.off;
       object_reset(an_object);
       processing.remove("verse");
     } else if (obj_type_status["code"] == TriState.closing) {
@@ -3099,19 +3099,19 @@ template SiSUdocAbstraction() {
       an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
       anchor_tags = substantive_obj_misc_tuple[sObj.anchor_tags];
       comp_obj_code                             = comp_obj_code.init;
-      comp_obj_code.of_part                     = "body";
-      comp_obj_code.of_section                  = "body";
-      comp_obj_code.is_of                       = "block";
-      comp_obj_code.is_a                        = "code";
-      comp_obj_code.ocn                         = obj_cite_digits.on;
-      comp_obj_code.obj_cite_number             = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-      comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-      comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-      comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+      comp_obj_code.typeinfo.of_part            = "body";
+      comp_obj_code.typeinfo.of_section         = "body";
+      comp_obj_code.typeinfo.is_of              = "block";
+      comp_obj_code.typeinfo.is_a               = "code";
+      comp_obj_code.node.ocn                    = obj_cite_digits.on;
+      comp_obj_code.node.obj_cite_number        = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+      comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+      comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+      comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
       comp_obj_code.text                        = an_object["substantive"];
-      comp_obj_code.inline_notes_reg            = substantive_obj_misc_tuple[sObj.notes_reg];
-      comp_obj_code.inline_notes_star           = substantive_obj_misc_tuple[sObj.notes_star];
-      comp_obj_code.inline_links                = substantive_obj_misc_tuple[sObj.links];
+      comp_obj_code.has.inline_notes_reg        = substantive_obj_misc_tuple[sObj.notes_reg];
+      comp_obj_code.has.inline_notes_star       = substantive_obj_misc_tuple[sObj.notes_star];
+      comp_obj_code.has.inline_links            = substantive_obj_misc_tuple[sObj.links];
       the_document_body_section                 ~= comp_obj_code;
       obj_type_status["blocks"]                 = TriState.off;
       obj_type_status["code"]                   = TriState.off;
@@ -3143,11 +3143,11 @@ template SiSUdocAbstraction() {
         = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta);
       an_object["substantive"]                  = substantive_obj_misc_tuple[sObj.content];
       comp_obj_block                            = comp_obj_block.init;
-      comp_obj_block.ocn                        = obj_cite_digits.on;
-      comp_obj_block.obj_cite_number            = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-      comp_obj_block.obj_cite_number_off        = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-      comp_obj_block.obj_cite_number_bkidx      = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
-      comp_obj_block.obj_cite_number_type       = obj_cite_digits.type;
+      comp_obj_block.node.ocn                   = obj_cite_digits.on;
+      comp_obj_block.node.obj_cite_number       = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+      comp_obj_block.misc.obj_cite_number_off   = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+      comp_obj_block.misc.obj_cite_number_bkidx = (obj_cite_digits.bkidx==0) ? "" : obj_cite_digits.bkidx.to!string;
+      comp_obj_block.misc.obj_cite_number_type  = obj_cite_digits.type;
       comp_obj_block = table_instructions(comp_obj_block, an_object["table_head"]);
       comp_obj_block = table_substantive_munge(comp_obj_block, an_object["substantive"]);
       the_document_body_section                 ~= comp_obj_block;
@@ -3600,20 +3600,20 @@ template SiSUdocAbstraction() {
     return ref H  table_head,
   ) {
     static auto rgx = Rgx();
-    table_object.of_part           = "body";
-    table_object.of_section        = "body";
-    table_object.is_of             = "block";
-    table_object.is_a              = "table";
-    table_object.inline_notes_reg  = false;
-    table_object.inline_notes_star = false;
-    table_object.inline_links      = false;
+    table_object.typeinfo.of_part         = "body";
+    table_object.typeinfo.of_section      = "body";
+    table_object.typeinfo.is_of           = "block";
+    table_object.typeinfo.is_a            = "table";
+    table_object.has.inline_notes_reg     = false;
+    table_object.has.inline_notes_star    = false;
+    table_object.has.inline_links         = false;
     if (auto m = table_head.matchFirst(rgx.table_head_instructions)) {
-      table_object.table_heading = ((m["c_heading"].length > 0) && (m["c_heading"] == "h")) ? true : false;
-      table_object.table_number_of_columns = ((m["c_num"].length > 0) && (m["c_num"].to!int > 0)) ? m["c_num"].to!int : 0; // double check, may be obsolete
+      table_object.table.heading = ((m["c_heading"].length > 0) && (m["c_heading"] == "h")) ? true : false;
+      table_object.table.number_of_columns = ((m["c_num"].length > 0) && (m["c_num"].to!int > 0)) ? m["c_num"].to!int : 0; // double check, may be obsolete
       foreach (cw; m["c_widths"].matchAll(rgx.table_col_widths)) {
         auto x = cw.hit.matchFirst(rgx.table_col_widths_and_alignment);
-        table_object.table_column_widths ~= x["width"].to!int;
-        table_object.table_column_aligns ~= (x["align"].empty) ? "" : x["align"];
+        table_object.table.column_widths ~= x["width"].to!int;
+        table_object.table.column_aligns ~= (x["align"].empty) ? "" : x["align"];
       }
     }
     return table_object;
@@ -3655,26 +3655,26 @@ template SiSUdocAbstraction() {
         }
         col_num_ = idx_c;
         _table_substantive ~= col ~ mng.tc_s;
-        if (idx_r == 0 && comp_obj_block.table_heading) {
+        if (idx_r == 0 && comp_obj_block.table.heading) {
         } else if (col.match(rgx.numeric_col) && idx_r == 1) { // conditions reversed to avoid: gdc compiled program run segfault
-          if ((comp_obj_block.table_column_aligns.length > idx_c)
-          && (comp_obj_block.table_column_aligns[idx_c].matchFirst(rgx.table_col_align_match))) {
-            comp_obj_block.table_column_aligns[idx_c]
-              = comp_obj_block.table_column_aligns[idx_c];
-          } else if (comp_obj_block.table_column_aligns.length > idx_c) {
-            comp_obj_block.table_column_aligns[idx_c] = "r";
+          if ((comp_obj_block.table.column_aligns.length > idx_c)
+          && (comp_obj_block.table.column_aligns[idx_c].matchFirst(rgx.table_col_align_match))) {
+            comp_obj_block.table.column_aligns[idx_c]
+              = comp_obj_block.table.column_aligns[idx_c];
+          } else if (comp_obj_block.table.column_aligns.length > idx_c) {
+            comp_obj_block.table.column_aligns[idx_c] = "r";
           } else {
-            comp_obj_block.table_column_aligns ~= "r";
+            comp_obj_block.table.column_aligns ~= "r";
           }
         } else if (idx_r == 1) {
-          if ((comp_obj_block.table_column_aligns.length > idx_c)
-          && (comp_obj_block.table_column_aligns[idx_c].matchFirst(rgx.table_col_align_match))) {
-            comp_obj_block.table_column_aligns[idx_c]
-              = comp_obj_block.table_column_aligns[idx_c];
-          } else if (comp_obj_block.table_column_aligns.length > idx_c) {
-            comp_obj_block.table_column_aligns[idx_c] = "l";
+          if ((comp_obj_block.table.column_aligns.length > idx_c)
+          && (comp_obj_block.table.column_aligns[idx_c].matchFirst(rgx.table_col_align_match))) {
+            comp_obj_block.table.column_aligns[idx_c]
+              = comp_obj_block.table.column_aligns[idx_c];
+          } else if (comp_obj_block.table.column_aligns.length > idx_c) {
+            comp_obj_block.table.column_aligns[idx_c] = "l";
           } else {
-            comp_obj_block.table_column_aligns ~= "l";
+            comp_obj_block.table.column_aligns ~= "l";
           }
         }
       }
@@ -3688,55 +3688,55 @@ template SiSUdocAbstraction() {
       }
       _table_substantive = _table_substantive.replaceFirst(rgx.table_col_separator_nl, "\n");
     }
-    if (comp_obj_block.table_number_of_columns != col_num) {
-      if (comp_obj_block.table_number_of_columns == 0) {
-        comp_obj_block.table_number_of_columns = (col_num).to!int;
+    if (comp_obj_block.table.number_of_columns != col_num) {
+      if (comp_obj_block.table.number_of_columns == 0) {
+        comp_obj_block.table.number_of_columns = (col_num).to!int;
       } else {
         debug(table_dev) {
-          writeln(comp_obj_block.table_number_of_columns, " != ", col_num);
+          writeln(comp_obj_block.table.number_of_columns, " != ", col_num);
         }
       }
     }
-    if (table_object.table_number_of_columns == 0
-    && table_object.table_column_widths.length > 0) {
+    if (table_object.table.number_of_columns == 0
+    && table_object.table.column_widths.length > 0) {
         writeln(__LINE__, " ERROR");
     }
-    if (table_object.table_number_of_columns > 0
-    && table_object.table_column_widths.length == 0) {
-      double col_w = (100.00 / table_object.table_number_of_columns);
-      foreach (i; 0..table_object.table_number_of_columns) {
-        table_object.table_column_widths ~= col_w;
+    if (table_object.table.number_of_columns > 0
+    && table_object.table.column_widths.length == 0) {
+      double col_w = (100.00 / table_object.table.number_of_columns);
+      foreach (i; 0..table_object.table.number_of_columns) {
+        table_object.table.column_widths ~= col_w;
       }
-    } else if (table_object.table_number_of_columns
-    != table_object.table_column_widths.length) {
+    } else if (table_object.table.number_of_columns
+    != table_object.table.column_widths.length) {
       debug(table_dev) {
         writeln(m.hit); // further logic required
       }
-      if (table_object.table_number_of_columns > table_object.table_column_widths.length) {
-        double col_w = (100.00 - (table_object.table_column_widths).sum)
-          / (table_object.table_number_of_columns - table_object.table_column_widths.length);
-        foreach (i; 0..table_object.table_column_widths.length) {
-          table_object.table_column_widths ~= col_w;
+      if (table_object.table.number_of_columns > table_object.table.column_widths.length) {
+        double col_w = (100.00 - (table_object.table.column_widths).sum)
+          / (table_object.table.number_of_columns - table_object.table.column_widths.length);
+        foreach (i; 0..table_object.table.column_widths.length) {
+          table_object.table.column_widths ~= col_w;
         }
-        foreach (i; 0..(table_object.table_number_of_columns - table_object.table_column_widths.length)) {
-          table_object.table_column_widths ~= col_w;
+        foreach (i; 0..(table_object.table.number_of_columns - table_object.table.column_widths.length)) {
+          table_object.table.column_widths ~= col_w;
         }
-      } else if (table_object.table_number_of_columns < table_object.table_column_widths.length) {
+      } else if (table_object.table.number_of_columns < table_object.table.column_widths.length) {
         writeln(__LINE__, " warning, ERROR");
       }
     }
-    if (table_object.table_column_widths.sum > 101
-    || table_object.table_column_widths.sum < 95 ) {
-      writeln("sum: ", table_object.table_column_widths.sum,
-        ", array: ", table_object.table_column_widths,
-        ", cols: ", table_object.table_number_of_columns);
+    if (table_object.table.column_widths.sum > 101
+    || table_object.table.column_widths.sum < 95 ) {
+      writeln("sum: ", table_object.table.column_widths.sum,
+        ", array: ", table_object.table.column_widths,
+        ", cols: ", table_object.table.number_of_columns);
       writeln(_table_substantive);
     }
     debug(table_res) {
-      writeln("aligns: ", comp_obj_block.table_column_aligns, "\n",
-        "no. of columns: ", comp_obj_block.table_number_of_columns, "\n",
-        "col widths: ", comp_obj_block.table_column_widths,
-          " sum: ", comp_obj_block.table_column_widths.sum, "\n",
+      writeln("aligns: ", comp_obj_block.table.column_aligns, "\n",
+        "no. of columns: ", comp_obj_block.table.number_of_columns, "\n",
+        "col widths: ", comp_obj_block.table.column_widths,
+          " sum: ", comp_obj_block.table.column_widths.sum, "\n",
         _table_substantive);
     }
     comp_obj_block.text = _table_substantive;
@@ -4340,19 +4340,19 @@ template SiSUdocAbstraction() {
         );
         toc_txt_= munge.url_links(toc_txt_);
         comp_obj_toc                            = comp_obj_toc.init;
-        comp_obj_toc.of_part                    = "frontmatter";
-        comp_obj_toc.of_section                 = "toc";
-        comp_obj_toc.is_of                      = "para";
-        comp_obj_toc.is_a                       = "toc";
-        comp_obj_toc.ocn                        = 0;
-        comp_obj_toc.obj_cite_number            = "";
-        comp_obj_toc.obj_cite_number_off        = "";
-        comp_obj_toc.obj_cite_number_type       = 0;
-        comp_obj_toc.indent_hang                = indent["hang_position"];
-        comp_obj_toc.indent_base                = indent["base_position"];
-        comp_obj_toc.bullet                     = false;
+        comp_obj_toc.typeinfo.of_part           = "frontmatter";
+        comp_obj_toc.typeinfo.of_section        = "toc";
+        comp_obj_toc.typeinfo.is_of             = "para";
+        comp_obj_toc.typeinfo.is_a              = "toc";
+        comp_obj_toc.node.ocn                   = 0;
+        comp_obj_toc.node.obj_cite_number       = "";
+        comp_obj_toc.misc.obj_cite_number_off   = "";
+        comp_obj_toc.misc.obj_cite_number_type  = 0;
+        comp_obj_toc.attrib.indent_hang         = indent["hang_position"];
+        comp_obj_toc.attrib.indent_base         = indent["base_position"];
+        comp_obj_toc.attrib.bullet              = false;
         comp_obj_toc.text                       = toc_txt_.to!string.strip;
-        comp_obj_toc.inline_links               = true;
+        comp_obj_toc.has.inline_links           = true;
         the_table_of_contents_section["scroll"] ~= comp_obj_toc;
       } else {
         indent=[
@@ -4360,32 +4360,32 @@ template SiSUdocAbstraction() {
           "base_position" : 0,
         ];
         comp_obj_toc                            = comp_obj_toc.init;
-        comp_obj_toc.of_part                    = "frontmatter";
-        comp_obj_toc.of_section                 = "toc";
-        comp_obj_toc.is_of                      = "para";
-        comp_obj_toc.is_a                       = "toc";
-        comp_obj_toc.ocn                        = 0;
-        comp_obj_toc.obj_cite_number            = "";
-        comp_obj_toc.obj_cite_number_off        = "";
-        comp_obj_toc.obj_cite_number_type       = 0;
-        comp_obj_toc.indent_hang                = indent["hang_position"];
-        comp_obj_toc.indent_base                = indent["base_position"];
-        comp_obj_toc.bullet                     = false;
+        comp_obj_toc.typeinfo.of_part           = "frontmatter";
+        comp_obj_toc.typeinfo.of_section        = "toc";
+        comp_obj_toc.typeinfo.is_of             = "para";
+        comp_obj_toc.typeinfo.is_a              = "toc";
+        comp_obj_toc.node.ocn                   = 0;
+        comp_obj_toc.node.obj_cite_number       = "";
+        comp_obj_toc.misc.obj_cite_number_off   = "";
+        comp_obj_toc.misc.obj_cite_number_type  = 0;
+        comp_obj_toc.attrib.indent_hang         = indent["hang_position"];
+        comp_obj_toc.attrib.indent_base         = indent["base_position"];
+        comp_obj_toc.attrib.bullet              = false;
         comp_obj_toc.text                       = "Table of Contents";
-        comp_obj_toc.inline_links               = true;
+        comp_obj_toc.has.inline_links           = true;
         the_table_of_contents_section["scroll"] ~= comp_obj_toc;
       }
       comp_obj_toc                              = comp_obj_toc.init;
-      comp_obj_toc.of_part                      = "frontmatter";
-      comp_obj_toc.of_section                   = "toc";
-      comp_obj_toc.is_of                        = "para";
-      comp_obj_toc.is_a                         = "toc";
-      comp_obj_toc.ocn                          = 0;
-      comp_obj_toc.obj_cite_number              = "";
-      comp_obj_toc.obj_cite_number_off          = "";
-      comp_obj_toc.obj_cite_number_type         = 0;
-      comp_obj_toc.bullet                       = false;
-      comp_obj_toc.inline_links                 = true;
+      comp_obj_toc.typeinfo.of_part             = "frontmatter";
+      comp_obj_toc.typeinfo.of_section          = "toc";
+      comp_obj_toc.typeinfo.is_of               = "para";
+      comp_obj_toc.typeinfo.is_a                = "toc";
+      comp_obj_toc.node.ocn                     = 0;
+      comp_obj_toc.node.obj_cite_number         = "";
+      comp_obj_toc.misc.obj_cite_number_off     = "";
+      comp_obj_toc.misc.obj_cite_number_type    = 0;
+      comp_obj_toc.attrib.bullet                = false;
+      comp_obj_toc.has.inline_links             = true;
       switch (obj_["lev_markup_number"].to!int) {
       case 0:
         indent=[
@@ -4394,10 +4394,10 @@ template SiSUdocAbstraction() {
         ];
         toc_txt_ = "{ Table of Contents }" ~ mkup.mark_internal_site_lnk ~ "toc.fnSuffix";
         toc_txt_= munge.url_links(toc_txt_);
-        comp_obj_toc.indent_hang                = indent["hang_position"];
-        comp_obj_toc.indent_base                = indent["base_position"];
+        comp_obj_toc.attrib.indent_hang         = indent["hang_position"];
+        comp_obj_toc.attrib.indent_base         = indent["base_position"];
         comp_obj_toc.text                       = toc_txt_.to!string.strip;
-        comp_obj_toc.inline_links               = true;
+        comp_obj_toc.has.inline_links           = true;
         the_table_of_contents_section["seg"]    ~= comp_obj_toc;
         break;
       case 1: .. case 3:
@@ -4410,10 +4410,10 @@ template SiSUdocAbstraction() {
           heading_toc_,
         );
         toc_txt_= munge.url_links(toc_txt_);
-        comp_obj_toc.indent_hang                = indent["hang_position"];
-        comp_obj_toc.indent_base                = indent["base_position"];
+        comp_obj_toc.attrib.indent_hang         = indent["hang_position"];
+        comp_obj_toc.attrib.indent_base         = indent["base_position"];
         comp_obj_toc.text                       = toc_txt_.to!string.strip;
-        comp_obj_toc.inline_links               = true;
+        comp_obj_toc.has.inline_links           = true;
         the_table_of_contents_section["seg"]    ~= comp_obj_toc;
         break;
       case 4:
@@ -4430,10 +4430,10 @@ template SiSUdocAbstraction() {
           "hang_position" : obj_["lev_markup_number"].to!int,
           "base_position" : obj_["lev_markup_number"].to!int,
         ];
-        comp_obj_toc.indent_hang                = indent["hang_position"];
-        comp_obj_toc.indent_base                = indent["base_position"];
+        comp_obj_toc.attrib.indent_hang         = indent["hang_position"];
+        comp_obj_toc.attrib.indent_base         = indent["base_position"];
         comp_obj_toc.text                       = toc_txt_.to!string.strip;
-        comp_obj_toc.inline_links               = true;
+        comp_obj_toc.has.inline_links           = true;
         the_table_of_contents_section["seg"]    ~= comp_obj_toc;
         break;
       case 5: .. case 7:
@@ -4459,10 +4459,10 @@ template SiSUdocAbstraction() {
           "hang_position" : obj_["lev_markup_number"].to!int,
           "base_position" : obj_["lev_markup_number"].to!int,
         ];
-        comp_obj_toc.indent_hang                = indent["hang_position"];
-        comp_obj_toc.indent_base                = indent["base_position"];
+        comp_obj_toc.attrib.indent_hang         = indent["hang_position"];
+        comp_obj_toc.attrib.indent_base         = indent["base_position"];
         comp_obj_toc.text                       = toc_txt_.to!string.strip;
-        comp_obj_toc.inline_links               = true;
+        comp_obj_toc.has.inline_links           = true;
         the_table_of_contents_section["seg"]    ~= comp_obj_toc;
         break;
       default:
@@ -4893,16 +4893,16 @@ template SiSUdocAbstraction() {
         (oa_j.type == JSON_TYPE.OBJECT)
       );
       if (obj_is_ == "heading") {
-        oa_j.object["obj_cite_number"] = _comp_obj_heading.ocn;
-        oa_j.object["lev_markup_number"] = _comp_obj_heading.heading_lev_markup;
-        oa_j.object["lev_collapsed_number"] = _comp_obj_heading.heading_lev_collapsed;
+        oa_j.object["obj_cite_number"] = _comp_obj_heading.node.ocn;
+        oa_j.object["lev_markup_number"] = _comp_obj_heading.node.heading_lev_markup;
+        oa_j.object["lev_collapsed_number"] = _comp_obj_heading.node.heading_lev_collapsed;
         oa_j.object["heading_ptr"]
-          = _comp_obj_heading.ptr_heading;
+          = _comp_obj_heading.ptr.heading;
         oa_j.object["doc_object_ptr"]
-          = _comp_obj_heading.ptr_doc_object;
+          = _comp_obj_heading.ptr.doc_object;
       }
-      oa_j.object["parent_obj_cite_number"] = _comp_obj_heading.parent_ocn;
-      oa_j.object["parent_lev_markup_number"] = _comp_obj_heading.parent_lev_markup;
+      oa_j.object["parent_obj_cite_number"] = _comp_obj_heading.node.parent_ocn;
+      oa_j.object["parent_lev_markup_number"] = _comp_obj_heading.node.parent_lev_markup;
       _obj_attrib = oa_j.toString();
       return _obj_attrib;
     }
@@ -5078,46 +5078,46 @@ template SiSUdocAbstraction() {
       && opt_action.section_bookindex)) {
         string bi_tmp_seg, bi_tmp_scroll;
         string[] bi_tmp_tags;
-        comp_obj_heading_                       = comp_obj_heading_.init;
-        comp_obj_heading_.of_part               = "backmatter";
-        comp_obj_heading_.of_section            = "bookindex";
-        comp_obj_heading_.is_of                 = "para";
-        comp_obj_heading_.is_a                  = "heading";
-        comp_obj_heading_.text                  = "Book Index";
-        comp_obj_heading_.ocn                   = 0;
-        comp_obj_heading_.obj_cite_number       = "";
-        comp_obj_heading_.obj_cite_number_off   = "";
-        comp_obj_heading_.obj_cite_number_type  = 0;
-        comp_obj_heading_.segment_anchor_tag    = "_part_book_index";
-        comp_obj_heading_.marked_up_level       = "B";
-        comp_obj_heading_.heading_lev_markup    = 1;
-        comp_obj_heading_.heading_lev_collapsed = 1;
-        comp_obj_heading_.parent_ocn            = 1;
-        comp_obj_heading_.parent_lev_markup     = 0;
-        comp_obj_heading.inline_links           = true;
-        bookindex_section["scroll"]             ~= comp_obj_heading_;
-        bookindex_section["seg"]                ~= comp_obj_heading_;
+        comp_obj_heading_                            = comp_obj_heading_.init;
+        comp_obj_heading_.typeinfo.of_part           = "backmatter";
+        comp_obj_heading_.typeinfo.of_section        = "bookindex";
+        comp_obj_heading_.typeinfo.is_of             = "para";
+        comp_obj_heading_.typeinfo.is_a              = "heading";
+        comp_obj_heading_.text                       = "Book Index";
+        comp_obj_heading_.node.ocn                   = 0;
+        comp_obj_heading_.node.obj_cite_number       = "";
+        comp_obj_heading_.misc.obj_cite_number_off   = "";
+        comp_obj_heading_.misc.obj_cite_number_type  = 0;
+        comp_obj_heading_.tags.segment_anchor_tag    = "_part_book_index";
+        comp_obj_heading_.node.marked_up_level       = "B";
+        comp_obj_heading_.node.heading_lev_markup    = 1;
+        comp_obj_heading_.node.heading_lev_collapsed = 1;
+        comp_obj_heading_.node.parent_ocn            = 1;
+        comp_obj_heading_.node.parent_lev_markup     = 0;
+        comp_obj_heading.has.inline_links            = true;
+        bookindex_section["scroll"]                  ~= comp_obj_heading_;
+        bookindex_section["seg"]                     ~= comp_obj_heading_;
         ++mkn;
-        comp_obj_heading_                       = comp_obj_heading_.init;
-        comp_obj_heading_.of_part               = "backmatter";
-        comp_obj_heading_.of_section            = "bookindex";
-        comp_obj_heading_.is_of                 = "para";
-        comp_obj_heading_.is_a                  = "heading";
-        comp_obj_heading_.text                  = "Index";
-        comp_obj_heading_.ocn                   = 0;
-        comp_obj_heading_.obj_cite_number       = "";
-        comp_obj_heading_.obj_cite_number_off   = "";
-        comp_obj_heading_.obj_cite_number_type  = 0;
-        comp_obj_heading_.segment_anchor_tag    = "bookindex";
-        comp_obj_heading_.marked_up_level       = "1";
-        comp_obj_heading_.heading_lev_markup    = 4;
-        comp_obj_heading_.heading_lev_collapsed = 2;
-        comp_obj_heading_.parent_ocn            = 1;
-        comp_obj_heading_.parent_lev_markup     = 0;
-        comp_obj_heading.inline_links           = false;
-        comp_obj_heading_.anchor_tags           = ["bookindex"];
-        bookindex_section["scroll"]             ~= comp_obj_heading_;
-        bookindex_section["seg"]                ~= comp_obj_heading_;
+        comp_obj_heading_                            = comp_obj_heading_.init;
+        comp_obj_heading_.typeinfo.of_part           = "backmatter";
+        comp_obj_heading_.typeinfo.of_section        = "bookindex";
+        comp_obj_heading_.typeinfo.is_of             = "para";
+        comp_obj_heading_.typeinfo.is_a              = "heading";
+        comp_obj_heading_.text                       = "Index";
+        comp_obj_heading_.node.ocn                   = 0;
+        comp_obj_heading_.node.obj_cite_number       = "";
+        comp_obj_heading_.misc.obj_cite_number_off   = "";
+        comp_obj_heading_.misc.obj_cite_number_type  = 0;
+        comp_obj_heading_.tags.segment_anchor_tag    = "bookindex";
+        comp_obj_heading_.node.marked_up_level       = "1";
+        comp_obj_heading_.node.heading_lev_markup    = 4;
+        comp_obj_heading_.node.heading_lev_collapsed = 2;
+        comp_obj_heading_.node.parent_ocn            = 1;
+        comp_obj_heading_.node.parent_lev_markup     = 0;
+        comp_obj_heading.has.inline_links            = false;
+        comp_obj_heading_.tags.anchor_tags           = ["bookindex"];
+        bookindex_section["scroll"]                  ~= comp_obj_heading_;
+        bookindex_section["seg"]                     ~= comp_obj_heading_;
         ++mkn;
         import std.array : appender;
         auto buffer = appender!(char[])();
@@ -5174,42 +5174,42 @@ template SiSUdocAbstraction() {
             bi_tmp_seg ~= " \\\\\n    ";
             ++skn;
           }
-          bi_tmp_scroll                       = (bi_tmp_scroll).replaceFirst(rgx.trailing_linebreak, "");
-          bi_tmp_seg                          = (bi_tmp_seg).replaceFirst(rgx.trailing_linebreak, "");
-          comp_obj_para                       = comp_obj_para.init;
-          comp_obj_para.of_part               = "backmatter";
-          comp_obj_para.of_section            = "bookindex";
-          comp_obj_para.is_of                 = "para";
-          comp_obj_para.is_a                  = "bookindex";
-          comp_obj_para.text                  = bi_tmp_scroll.to!string.strip;
-          comp_obj_para.ocn                   = 0;
-          comp_obj_para.obj_cite_number       = "";
-          comp_obj_para.obj_cite_number_off   = "";
-          comp_obj_para.obj_cite_number_type  = 0;
-          comp_obj_para.anchor_tags           = bi_tmp_tags;
-          comp_obj_para.indent_hang           = 0;
-          comp_obj_para.indent_base           = 1;
-          comp_obj_para.bullet                = false;
-          comp_obj_para.inline_links          = true;
-          bookindex_section["scroll"]         ~= comp_obj_para;
-          comp_obj_para.text                  = bi_tmp_seg.to!string.strip;
-          bookindex_section["seg"]            ~= comp_obj_para;
+          bi_tmp_scroll                           = (bi_tmp_scroll).replaceFirst(rgx.trailing_linebreak, "");
+          bi_tmp_seg                              = (bi_tmp_seg).replaceFirst(rgx.trailing_linebreak, "");
+          comp_obj_para                           = comp_obj_para.init;
+          comp_obj_para.typeinfo.of_part          = "backmatter";
+          comp_obj_para.typeinfo.of_section       = "bookindex";
+          comp_obj_para.typeinfo.is_of            = "para";
+          comp_obj_para.typeinfo.is_a             = "bookindex";
+          comp_obj_para.text                      = bi_tmp_scroll.to!string.strip;
+          comp_obj_para.node.ocn                  = 0;
+          comp_obj_para.node.obj_cite_number      = "";
+          comp_obj_para.misc.obj_cite_number_off  = "";
+          comp_obj_para.misc.obj_cite_number_type = 0;
+          comp_obj_para.tags.anchor_tags          = bi_tmp_tags;
+          comp_obj_para.attrib.indent_hang        = 0;
+          comp_obj_para.attrib.indent_base        = 1;
+          comp_obj_para.attrib.bullet             = false;
+          comp_obj_para.has.inline_links          = true;
+          bookindex_section["scroll"]             ~= comp_obj_para;
+          comp_obj_para.text                      = bi_tmp_seg.to!string.strip;
+          bookindex_section["seg"]                ~= comp_obj_para;
           ++mkn;
         }
       } else {                              // no book index, (figure out what to do here)
-        comp_obj_heading_                       = comp_obj_heading_.init;
-        comp_obj_heading_.text                  = "(skip) there is no Book Index";
-        comp_obj_heading_.ocn                   = 0;
-        comp_obj_heading_.obj_cite_number       = "";
-        comp_obj_heading_.obj_cite_number_off   = "";
-        comp_obj_heading_.obj_cite_number_type  = 0;
-        comp_obj_heading_.marked_up_level       = "B";
-        comp_obj_heading_.heading_lev_markup    = 1;
-        comp_obj_heading_.heading_lev_collapsed = 1;
-        comp_obj_heading_.parent_ocn            = 1;
-        comp_obj_heading_.parent_lev_markup     = 0;
-        bookindex_section["scroll"]             ~= comp_obj_heading_;
-        bookindex_section["seg"]                ~= comp_obj_heading_;
+        comp_obj_heading_                            = comp_obj_heading_.init;
+        comp_obj_heading_.text                       = "(skip) there is no Book Index";
+        comp_obj_heading_.node.ocn                   = 0;
+        comp_obj_heading_.node.obj_cite_number       = "";
+        comp_obj_heading_.misc.obj_cite_number_off   = "";
+        comp_obj_heading_.misc.obj_cite_number_type  = 0;
+        comp_obj_heading_.node.marked_up_level       = "B";
+        comp_obj_heading_.node.heading_lev_markup    = 1;
+        comp_obj_heading_.node.heading_lev_collapsed = 1;
+        comp_obj_heading_.node.parent_ocn            = 1;
+        comp_obj_heading_.node.parent_lev_markup     = 0;
+        bookindex_section["scroll"]                  ~= comp_obj_heading_;
+        bookindex_section["seg"]                     ~= comp_obj_heading_;
       }
       auto t = tuple(bookindex_section, obj_cite_digits);
       return t;
@@ -5227,12 +5227,12 @@ template SiSUdocAbstraction() {
       int                   cntr,
     )
     in {
-      assert((contents_am[cntr].is_a == "para")
-      || (contents_am[cntr].is_a == "heading")
-      || (contents_am[cntr].is_a == "quote")
-      || (contents_am[cntr].is_a == "group")
-      || (contents_am[cntr].is_a == "block")
-      || (contents_am[cntr].is_a == "verse"));
+      assert((contents_am[cntr].typeinfo.is_a == "para")
+      || (contents_am[cntr].typeinfo.is_a == "heading")
+      || (contents_am[cntr].typeinfo.is_a == "quote")
+      || (contents_am[cntr].typeinfo.is_a == "group")
+      || (contents_am[cntr].typeinfo.is_a == "block")
+      || (contents_am[cntr].typeinfo.is_a == "verse"));
       assert(cntr >= previous_count);
       previous_count=cntr;
       assert(
@@ -5308,81 +5308,81 @@ template SiSUdocAbstraction() {
       ObjGenericComposite comp_obj_heading_;
       if ((endnotes_["notes"].length > 0)
       && (opt_action.backmatter && opt_action.section_endnotes)) {
-        comp_obj_heading_                       = comp_obj_heading_.init;
-        comp_obj_heading_.of_part               = "backmatter";
-        comp_obj_heading_.of_section            = "endnotes";
-        comp_obj_heading_.is_of                 = "para";
-        comp_obj_heading_.is_a                  = "heading";
-        comp_obj_heading_.text                  = "Endnotes";
-        comp_obj_heading_.ocn                   = 0;
-        comp_obj_heading_.obj_cite_number       = "";
-        comp_obj_heading_.obj_cite_number_off   = "";
-        comp_obj_heading_.obj_cite_number_type  = 0;
-        comp_obj_heading_.segment_anchor_tag    = "_part_endnotes";
-        comp_obj_heading_.marked_up_level       = "B";
-        comp_obj_heading_.heading_lev_markup    = 1;
-        comp_obj_heading_.heading_lev_collapsed = 1;
-        comp_obj_heading_.parent_ocn            = 1;
-        comp_obj_heading_.parent_lev_markup     = 0;
-        the_endnotes_section                    ~= comp_obj_heading_;
+        comp_obj_heading_                            = comp_obj_heading_.init;
+        comp_obj_heading_.typeinfo.of_part           = "backmatter";
+        comp_obj_heading_.typeinfo.of_section        = "endnotes";
+        comp_obj_heading_.typeinfo.is_of             = "para";
+        comp_obj_heading_.typeinfo.is_a              = "heading";
+        comp_obj_heading_.text                       = "Endnotes";
+        comp_obj_heading_.node.ocn                   = 0;
+        comp_obj_heading_.node.obj_cite_number       = "";
+        comp_obj_heading_.misc.obj_cite_number_off   = "";
+        comp_obj_heading_.misc.obj_cite_number_type  = 0;
+        comp_obj_heading_.tags.segment_anchor_tag    = "_part_endnotes";
+        comp_obj_heading_.node.marked_up_level       = "B";
+        comp_obj_heading_.node.heading_lev_markup    = 1;
+        comp_obj_heading_.node.heading_lev_collapsed = 1;
+        comp_obj_heading_.node.parent_ocn            = 1;
+        comp_obj_heading_.node.parent_lev_markup     = 0;
+        the_endnotes_section                         ~= comp_obj_heading_;
         ++mkn;
-        comp_obj_heading_                       = comp_obj_heading_.init;
-        comp_obj_heading_.of_part               = "backmatter";
-        comp_obj_heading_.of_section            = "endnotes";
-        comp_obj_heading_.is_of                 = "para";
-        comp_obj_heading_.is_a                  = "heading";
-        comp_obj_heading_.text                  = "Endnotes";
-        comp_obj_heading_.ocn                   = 0;
-        comp_obj_heading_.obj_cite_number       = "";
-        comp_obj_heading_.obj_cite_number_off   = "";
-        comp_obj_heading_.obj_cite_number_type  = 0;
-        comp_obj_heading_.segment_anchor_tag    = "endnotes";
-        comp_obj_heading_.marked_up_level       = "1";
-        comp_obj_heading_.heading_lev_markup    = 4;
-        comp_obj_heading_.heading_lev_collapsed = 2;
-        comp_obj_heading_.parent_ocn            = 1;
-        comp_obj_heading_.parent_lev_markup     = 0;
-        comp_obj_heading_.anchor_tags           = ["endnotes"];
-        the_endnotes_section                    ~= comp_obj_heading_;
+        comp_obj_heading_                            = comp_obj_heading_.init;
+        comp_obj_heading_.typeinfo.of_part           = "backmatter";
+        comp_obj_heading_.typeinfo.of_section        = "endnotes";
+        comp_obj_heading_.typeinfo.is_of             = "para";
+        comp_obj_heading_.typeinfo.is_a              = "heading";
+        comp_obj_heading_.text                       = "Endnotes";
+        comp_obj_heading_.node.ocn                   = 0;
+        comp_obj_heading_.node.obj_cite_number       = "";
+        comp_obj_heading_.misc.obj_cite_number_off   = "";
+        comp_obj_heading_.misc.obj_cite_number_type  = 0;
+        comp_obj_heading_.tags.segment_anchor_tag    = "endnotes";
+        comp_obj_heading_.node.marked_up_level       = "1";
+        comp_obj_heading_.node.heading_lev_markup    = 4;
+        comp_obj_heading_.node.heading_lev_collapsed = 2;
+        comp_obj_heading_.node.parent_ocn            = 1;
+        comp_obj_heading_.node.parent_lev_markup     = 0;
+        comp_obj_heading_.tags.anchor_tags           = ["endnotes"];
+        the_endnotes_section                         ~= comp_obj_heading_;
         ++mkn;
       } else {
-        comp_obj_heading_                       = comp_obj_heading_.init;
-        comp_obj_heading_.of_part               = "empty";
-        comp_obj_heading_.of_section            = "empty";
-        comp_obj_heading_.is_of                 = "para";
-        comp_obj_heading_.is_a                  = "heading";
-        comp_obj_heading_.text                  = "(skip) there are no Endnotes";
-        comp_obj_heading_.ocn                   = 0;
-        comp_obj_heading_.obj_cite_number       = "";
-        comp_obj_heading_.obj_cite_number_off   = "";
-        comp_obj_heading_.obj_cite_number_type  = 0;
-        comp_obj_heading_.marked_up_level       = "B";
-        comp_obj_heading_.heading_lev_markup    = 1;
-        comp_obj_heading_.heading_lev_collapsed = 1;
-        comp_obj_heading_.parent_ocn            = 1;
-        comp_obj_heading_.parent_lev_markup     = 0;
-        the_endnotes_section                    ~= comp_obj_heading_;
+        comp_obj_heading_                            = comp_obj_heading_.init;
+        comp_obj_heading_.typeinfo.of_part           = "empty";
+        comp_obj_heading_.typeinfo.of_section        = "empty";
+        comp_obj_heading_.typeinfo.is_of             = "para";
+        comp_obj_heading_.typeinfo.is_a              = "heading";
+        comp_obj_heading_.text                       = "(skip) there are no Endnotes";
+        comp_obj_heading_.node.ocn                   = 0;
+        comp_obj_heading_.node.obj_cite_number       = "";
+        comp_obj_heading_.misc.obj_cite_number_off   = "";
+        comp_obj_heading_.misc.obj_cite_number_type  = 0;
+        comp_obj_heading_.node.marked_up_level       = "B";
+        comp_obj_heading_.node.heading_lev_markup    = 1;
+        comp_obj_heading_.node.heading_lev_collapsed = 1;
+        comp_obj_heading_.node.parent_ocn            = 1;
+        comp_obj_heading_.node.parent_lev_markup     = 0;
+        the_endnotes_section                         ~= comp_obj_heading_;
       }
       if (opt_action.backmatter && opt_action.section_endnotes) {
         ObjGenericComposite comp_obj_endnote_;
-        comp_obj_endnote_                       = comp_obj_endnote_.init;
-        comp_obj_endnote_.of_part               = "backmatter";
-        comp_obj_endnote_.of_section            = "endnote";
-        comp_obj_endnote_.is_of                 = "para";
-        comp_obj_endnote_.is_a                  = "endnote";
-        comp_obj_endnote_.ocn                   = 0;
-        comp_obj_heading_.obj_cite_number       = "";
-        comp_obj_heading_.obj_cite_number_off   = "";
-        comp_obj_heading_.obj_cite_number_type  = 0;
-        comp_obj_endnote_.indent_hang           = 0;
-        comp_obj_endnote_.indent_base           = 0;
-        comp_obj_endnote_.bullet                = false;
+        comp_obj_endnote_                            = comp_obj_endnote_.init;
+        comp_obj_endnote_.typeinfo.of_part           = "backmatter";
+        comp_obj_endnote_.typeinfo.of_section        = "endnote";
+        comp_obj_endnote_.typeinfo.is_of             = "para";
+        comp_obj_endnote_.typeinfo.is_a              = "endnote";
+        comp_obj_endnote_.node.ocn                   = 0;
+        comp_obj_heading_.node.obj_cite_number       = "";
+        comp_obj_heading_.misc.obj_cite_number_off   = "";
+        comp_obj_heading_.misc.obj_cite_number_type  = 0;
+        comp_obj_endnote_.attrib.indent_hang         = 0;
+        comp_obj_endnote_.attrib.indent_base         = 0;
+        comp_obj_endnote_.attrib.bullet              = false;
         foreach (i, endnote; endnotes_["notes"]) {
           auto     m                            = endnote.matchFirst(rgx.note_ref);
           string   notenumber                   = m.captures[1].to!string;
           string   anchor_tag                   = "note_" ~ notenumber;
-          comp_obj_endnote_.anchor_tags         = [ endnotes_["anchor"][i] ];
-          comp_obj_endnote_.inline_links        = true;
+          comp_obj_endnote_.tags.anchor_tags    = [ endnotes_["anchor"][i] ];
+          comp_obj_endnote_.has.inline_links    = true;
           comp_obj_endnote_.text                = endnote.strip;
           the_endnotes_section                  ~= comp_obj_endnote_;
         }
@@ -5534,12 +5534,12 @@ template SiSUdocAbstraction() {
         p_["obj_cite_number"] = lv4;
       }
       ObjGenericComposite comp_obj_location;
-      comp_obj_location                       = comp_obj_location.init;
-      comp_obj_location.is_a                  = is_;
-      comp_obj_location.ocn                   = obj_cite_digits.on;
-      comp_obj_location.segment_anchor_tag    = segment_anchor_tag.to!string;
-      comp_obj_location.parent_ocn            = p_["obj_cite_number"];
-      comp_obj_location.parent_lev_markup     = p_["lev_markup_number"];
+      comp_obj_location                         = comp_obj_location.init;
+      comp_obj_location.typeinfo.is_a           = is_;
+      comp_obj_location.node.ocn                = obj_cite_digits.on;
+      comp_obj_location.tags.segment_anchor_tag = segment_anchor_tag.to!string;
+      comp_obj_location.node.parent_ocn         = p_["obj_cite_number"];
+      comp_obj_location.node.parent_lev_markup  = p_["lev_markup_number"];
       debug(node) {
         if (lev_markup_number.match(rgx.levels_numbered_headings)) {
           writeln("x ", _node.to!string);
@@ -5547,9 +5547,9 @@ template SiSUdocAbstraction() {
           writeln("- ", _node.to!string);
         }
       }
-      assert(comp_obj_location.parent_lev_markup >= 4);
-      assert(comp_obj_location.parent_lev_markup <= 7);
-      assert(comp_obj_location.parent_ocn >= 0);
+      assert(comp_obj_location.node.parent_lev_markup >= 4);
+      assert(comp_obj_location.node.parent_lev_markup <= 7);
+      assert(comp_obj_location.node.parent_ocn >= 0);
       return comp_obj_location;
     }
     invariant() {
@@ -5685,29 +5685,29 @@ template SiSUdocAbstraction() {
         break;
       }
       ObjGenericComposite _comp_obj_heading_;
-      _comp_obj_heading_                           = _comp_obj_heading_.init;
-      _comp_obj_heading_.of_part                   = "body";
-      _comp_obj_heading_.of_section                = "body";
-      _comp_obj_heading_.is_of                     = "para";
-      _comp_obj_heading_.is_a                      = "heading";
-      _comp_obj_heading_.text                      = _text.to!string.strip;
-      _comp_obj_heading_.ocn                       = obj_cite_digits.on;
-      _comp_obj_heading_.obj_cite_number           = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
-      _comp_obj_heading_.obj_cite_number_off       = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
-      _comp_obj_heading_.obj_cite_number_type      = obj_cite_digits.type;
-      _comp_obj_heading_.segment_anchor_tag        = segment_anchor_tag.to!string;
-      _comp_obj_heading_.marked_up_level           = lev;
-      _comp_obj_heading_.heading_lev_markup        = (!(lev_markup_number.empty) ? lev_markup_number.to!int : 0);
-      _comp_obj_heading_.heading_lev_collapsed     = (!(lev_collapsed_number.empty) ? lev_collapsed_number.to!int : 0);
-      _comp_obj_heading_.parent_ocn                = p_["obj_cite_number"];
-      _comp_obj_heading_.parent_lev_markup         = p_["lev_markup_number"];
-      _comp_obj_heading_.heading_ancestors_text    = lv_ancestors_txt;
-      _comp_obj_heading_.ptr_doc_object            = cntr_;
-      _comp_obj_heading_.ptr_html_segnames         = ((lev_markup_number == "4") ? html_segnames_ptr : 0);
-      _comp_obj_heading_.ptr_heading               = ptr_;
-      _comp_obj_heading_.inline_notes_reg          = flag_notes_reg;
-      _comp_obj_heading_.inline_notes_star         = flag_notes_star;
-      _comp_obj_heading_.inline_links              = flag_links;
+      _comp_obj_heading_                               = _comp_obj_heading_.init;
+      _comp_obj_heading_.typeinfo.of_part              = "body";
+      _comp_obj_heading_.typeinfo.of_section           = "body";
+      _comp_obj_heading_.typeinfo.is_of                = "para";
+      _comp_obj_heading_.typeinfo.is_a                 = "heading";
+      _comp_obj_heading_.text                          = _text.to!string.strip;
+      _comp_obj_heading_.node.ocn                      = obj_cite_digits.on;
+      _comp_obj_heading_.node.obj_cite_number          = (obj_cite_digits.on==0)    ? "" : obj_cite_digits.on.to!string;
+      _comp_obj_heading_.misc.obj_cite_number_off      = (obj_cite_digits.off==0)   ? "" : obj_cite_digits.off.to!string;
+      _comp_obj_heading_.misc.obj_cite_number_type     = obj_cite_digits.type;
+      _comp_obj_heading_.tags.segment_anchor_tag       = segment_anchor_tag.to!string;
+      _comp_obj_heading_.node.marked_up_level          = lev;
+      _comp_obj_heading_.node.heading_lev_markup       = (!(lev_markup_number.empty) ? lev_markup_number.to!int : 0);
+      _comp_obj_heading_.node.heading_lev_collapsed    = (!(lev_collapsed_number.empty) ? lev_collapsed_number.to!int : 0);
+      _comp_obj_heading_.node.parent_ocn               = p_["obj_cite_number"];
+      _comp_obj_heading_.node.parent_lev_markup        = p_["lev_markup_number"];
+      _comp_obj_heading_.tags.heading_ancestors_text   = lv_ancestors_txt;
+      _comp_obj_heading_.ptr.doc_object                = cntr_;
+      _comp_obj_heading_.ptr.html_segnames             = ((lev_markup_number == "4") ? html_segnames_ptr : 0);
+      _comp_obj_heading_.ptr.heading                   = ptr_;
+      _comp_obj_heading_.has.inline_notes_reg          = flag_notes_reg;
+      _comp_obj_heading_.has.inline_notes_star         = flag_notes_star;
+      _comp_obj_heading_.has.inline_links              = flag_links;
       debug(node) {
         if (lev_markup_number.match(rgx.levels_numbered_headings)) {
           writeln("* ", _node.to!string);
@@ -5718,34 +5718,34 @@ template SiSUdocAbstraction() {
           writeln("* ", _node.to!string);
         }
       }
-      assert(_comp_obj_heading_.parent_lev_markup <= 7);
-      assert(_comp_obj_heading_.parent_ocn >= 0);
+      assert(_comp_obj_heading_.node.parent_lev_markup <= 7);
+      assert(_comp_obj_heading_.node.parent_ocn >= 0);
       if (lev_markup_number.match(rgx.levels_numbered_headings)) {
-        assert(_comp_obj_heading_.heading_lev_markup <= 7);
-        assert(_comp_obj_heading_.ocn >= 0);
-        if (_comp_obj_heading_.parent_lev_markup > 0) {
-          assert(_comp_obj_heading_.parent_lev_markup < _comp_obj_heading_.heading_lev_markup);
-          if (_comp_obj_heading_.ocn != 0) {
-            assert(_comp_obj_heading_.parent_ocn < _comp_obj_heading_.ocn);
+        assert(_comp_obj_heading_.node.heading_lev_markup <= 7);
+        assert(_comp_obj_heading_.node.ocn >= 0);
+        if (_comp_obj_heading_.node.parent_lev_markup > 0) {
+          assert(_comp_obj_heading_.node.parent_lev_markup < _comp_obj_heading_.node.heading_lev_markup);
+          if (_comp_obj_heading_.node.ocn != 0) {
+            assert(_comp_obj_heading_.node.parent_ocn < _comp_obj_heading_.node.ocn);
           }
         }
-        if (_comp_obj_heading_.heading_lev_markup == 0) {
-          assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_sect_A);
-        } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_sect_B) {
-          assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_sect_A);
-        } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_sect_C) {
-          assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_sect_B);
-        } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_sect_D) {
-          assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_sect_C);
-        } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_text_1) {
-          assert(_comp_obj_heading_.parent_lev_markup <= DocStructMarkupHeading.h_sect_D);
-        } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_text_2) {
-          assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_text_1);
-        } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_text_3) {
-          assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_text_2);
-        } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_text_4) {
-          assert(_comp_obj_heading_.parent_lev_markup == DocStructMarkupHeading.h_text_3);
-        } else if  (_comp_obj_heading_.heading_lev_markup == DocStructMarkupHeading.h_text_5) {
+        if (_comp_obj_heading_.node.heading_lev_markup == 0) {
+          assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_sect_A);
+        } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_sect_B) {
+          assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_sect_A);
+        } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_sect_C) {
+          assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_sect_B);
+        } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_sect_D) {
+          assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_sect_C);
+        } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_text_1) {
+          assert(_comp_obj_heading_.node.parent_lev_markup <= DocStructMarkupHeading.h_sect_D);
+        } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_text_2) {
+          assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_text_1);
+        } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_text_3) {
+          assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_text_2);
+        } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_text_4) {
+          assert(_comp_obj_heading_.node.parent_lev_markup == DocStructMarkupHeading.h_text_3);
+        } else if  (_comp_obj_heading_.node.heading_lev_markup == DocStructMarkupHeading.h_text_5) {
         }
       }
       return _comp_obj_heading_;
diff --git a/src/sdp/meta/metadoc_summary.d b/src/sdp/meta/metadoc_summary.d
index 7db1b23..0566ff5 100644
--- a/src/sdp/meta/metadoc_summary.d
+++ b/src/sdp/meta/metadoc_summary.d
@@ -28,18 +28,18 @@ template SiSUabstractionSummary() {
       ];
       foreach (k; doc_matters.xml.keys_seq.seg) {
         foreach (obj; doc_abstraction[k]) {
-          if (obj.of_part != "empty") {
-            if (!empty(obj.obj_cite_number)) {
+          if (obj.typeinfo.of_part != "empty") {
+            if (!empty(obj.node.obj_cite_number)) {
               if (k == "body") {
-                check["last_obj_cite_number_body"] = obj.obj_cite_number;
+                check["last_obj_cite_number_body"] = obj.node.obj_cite_number;
               }
-              if (!(obj.obj_cite_number.empty)) {
-                check["last_obj_cite_number"] = obj.obj_cite_number;
+              if (!(obj.node.obj_cite_number.empty)) {
+                check["last_obj_cite_number"] = obj.node.obj_cite_number;
               }
             }
             if (k == "bookindex_seg") {
-              if (obj.obj_cite_number_type == 2) {
-                check["last_obj_cite_number_bkidx"] = obj.obj_cite_number_bkidx;
+              if (obj.misc.obj_cite_number_type == 2) {
+                check["last_obj_cite_number_bkidx"] = obj.misc.obj_cite_number_bkidx;
               }
             }
           }
diff --git a/src/sdp/meta/object_setter.d b/src/sdp/meta/object_setter.d
index 380bab7..2e92877 100644
--- a/src/sdp/meta/object_setter.d
+++ b/src/sdp/meta/object_setter.d
@@ -6,63 +6,77 @@
 module sdp.meta.object_setter;
 template ObjectSetter() {
   /+ structs +/
-  struct HeadingAttrib {
-    string lev                            = "9";
-    int    heading_lev_markup             = 9;
-    int    heading_lev_collapsed          = 9;
-    int[]  closes_lev_collapsed           = [];
-    int[]  closes_lev_markup              = [];
-    int    array_ptr                      = 0;
-    int    heading_array_ptr_segments     = 0;
+  struct DocObj_TypeInfo_ {
+    string                 of_part                            = ""; // frontmatter, body, backmatter
+    string                 of_section                         = ""; // toc, body, glossary, biography, book index, blurb
+    string                 is_of                              = ""; // para, block ?
+    string                 is_a                               = ""; // heading, para, table, code block, group, ...
   }
-  struct ObjGenericComposite {
-    // size_t id;
-    string                 of_part                            = "";
-    string                 of_section                         = "";
-    string                 is_of                              = "";
-    string                 is_a                               = "";
-    string                 text                               = "";
-    string                 obj_cite_number                    = "";
-    string                 obj_cite_number_off                = "";
-    string                 obj_cite_number_bkidx              = "";
-    int                    obj_cite_number_type               = 0;
-    string[]               anchor_tags                        = [];
+  struct DocObj_TxtAttrib_ {
     int                    indent_base                        = 0;
     int                    indent_hang                        = 0;
     bool                   bullet                             = false;
+    string                 language                           = ""; // not implemented, consider
+  }
+  struct DocObj_Has_ {
     bool                   inline_links                       = false;
     bool                   inline_notes_reg                   = false;
     bool                   inline_notes_star                  = false;
     bool                   contains_image_without_dimensions  = false;
-    string                 language                           = ""; // not implemented, consider
-    string                 code_block_syntax                  = "";
-    int                    table_number_of_columns            = 0;
-    double[]               table_column_widths                = [];
-    string[]               table_column_aligns                = [];
-    bool                   table_heading                      = false;
-    bool                   table_walls                        = false; // not implemented
-    int                    ocn                                = 0;
-    string                 segment_anchor_tag                 = "";
-    string                 segname_prev                       = "";
-    string                 segname_next                       = "";
-    int                    parent_lev_markup                  = 0;
-    int                    parent_ocn                         = 0;
-    int[]                  ancestors                          = [];
+  }
+  struct DocObj_Node_ {
+    string[string][string] node;
+    int                    ocn                                = 0; // duplicated as string with obj_cite_number
+    string                 obj_cite_number                    = ""; // duplicated as int with ocn may apply additional info for backmatter (glossary, biblio etc.)
     string                 marked_up_level                    = "9";
     int                    heading_lev_markup                 = 9;
     int                    heading_lev_collapsed              = 9;
     int[]                  dom_markedup                       = [ 0, 0, 0, 0, 0, 0, 0, 0,];
     int[]                  dom_collapsed                      = [ 0, 0, 0, 0, 0, 0, 0, 0,];
     int[]                  heading_ancestors                  = [ 0, 0, 0, 0, 0, 0, 0, 0,];
+    int                    parent_lev_markup                  = 0;
+    int                    parent_ocn                         = 0;
+    int[]                  ancestors                          = [];
+  }
+  struct DocObj_Table_ {
+    int                    number_of_columns                  = 0;
+    double[]               column_widths                      = [];
+    string[]               column_aligns                      = [];
+    bool                   heading                            = false;
+    bool                   walls                              = false; // not implemented
+  }
+  struct DocObj_CodeBlock_ {
+    string                 syntax                             = "";
+  }
+  struct DocObj_Pointer_ {
+    int                    doc_object                         = 0;
+    int                    html_segnames                      = 0;
+    int                    heading                            = 0;
+  }
+  struct DocObj_Tags_ {
     string[]               heading_ancestors_text             = [ "", "", "", "", "", "", "", "", ];
+    string                 segment_anchor_tag                 = "";
+    string                 segname_prev                       = "";
+    string                 segname_next                       = "";
     string[]               lev4_subtoc                        = [];
-    int                    heading_array_ptr                  = 0;
-    int                    ptr_doc_object                     = 0;
-    int                    ptr_html_segnames                  = 0;
-    int                    ptr_heading                        = 0;
-    int                    array_ptr                          = 0;
-    int                    heading_array_ptr_segments         = 0;
-    string[string][string] node;
+    string[]               anchor_tags                        = [];
+  }
+  struct DocObj_Misc_ {
+    string                 obj_cite_number_bkidx              = "";
+    string                 obj_cite_number_off                = "";
+    int                    obj_cite_number_type               = 0; // { ocn, non, bkidx }
+  }
+  struct ObjGenericComposite {
+    string                 text                               = "";
+    DocObj_TypeInfo_       typeinfo;
+    DocObj_TxtAttrib_      attrib;
+    DocObj_Tags_           tags;
+    DocObj_Has_            has;
+    DocObj_Table_          table;
+    DocObj_CodeBlock_      code_block;
+    DocObj_Misc_           misc;
+    DocObj_Pointer_        ptr;
+    DocObj_Node_           node;
   }
   struct TheObjects {
     ObjGenericComposite[] oca;
diff --git a/src/sdp/output/epub3.d b/src/sdp/output/epub3.d
index 3209fae..18b9986 100644
--- a/src/sdp/output/epub3.d
+++ b/src/sdp/output/epub3.d
@@ -104,20 +104,20 @@ template outputEPub3() {
     debug(epubmanifest) {
       foreach (s; doc_matters.xml.keys_seq.seg) {
         foreach (obj; doc_abstraction[s]) {
-          if (obj.is_a == "heading") {
-            if (obj.heading_lev_markup == 4) {
+          if (obj.typeinfo.is_a == "heading") {
+            if (obj.node.heading_lev_markup == 4) {
               writefln(
                 "%s~ [%s.xhtml] %s",
                 obj.marked_up_level,
-                obj.segment_anchor_tag,
+                obj.tags.segment_anchor_tag,
                 obj.text
               );
-            } else if (obj.heading_lev_markup > 4) {
+            } else if (obj.node.heading_lev_markup > 4) {
               writefln(
                 "%s~ [%s.xhtml#%s] %s",
                 obj.marked_up_level,
-                obj.segment_anchor_tag,
-                obj.obj_cite_number,
+                obj.tags.segment_anchor_tag,
+                obj.node.obj_cite_number,
                 obj.text
               );
             }
@@ -146,49 +146,49 @@ template outputEPub3() {
     );
     foreach (sect; doc_matters.xml.keys_seq.seg) {
       foreach (obj; doc_abstraction[sect]) {
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           string _txt = obj.text.replaceAll(rgx.inline_notes_al_gen, "").strip;
           foreach_reverse (n; 0 .. 7) {
             string k = n.to!string;
-            switch (obj.dom_collapsed[n]) {
+            switch (obj.node.dom_collapsed[n]) {
             case DomTags.close :
               toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "</li>" ~ "\n";
               toc ~= markup.indent_by_spaces_provided(n, "  ") ~ "</ol>" ~ "\n";
               break;
             case DomTags.close_and_open :
               toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "</li>" ~ "\n";
-              if  (obj.heading_lev_markup < 4) {
+              if  (obj.node.heading_lev_markup < 4) {
                 toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "<li>" ~ "\n"
                 ~ markup.indent_by_spaces_provided((n + 2), "  ")
-                ~ "<a href=\"" ~ obj.segment_anchor_tag ~ ".xhtml" ~ "\">"
+                ~ "<a href=\"" ~ obj.tags.segment_anchor_tag ~ ".xhtml" ~ "\">"
                 ~ _txt
                 ~ "</a>" ~ "\n";
               } else {
-                string hashtag =(obj.heading_lev_markup == 4)
+                string hashtag =(obj.node.heading_lev_markup == 4)
                 ? ""
-                : ("#" ~ obj.ocn.to!string);
+                : ("#" ~ obj.node.ocn.to!string);
                 toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "<li>" ~ "\n"
                 ~ markup.indent_by_spaces_provided((n + 2), "  ")
-                ~ "<a href=\"" ~ obj.segment_anchor_tag ~ ".xhtml" ~ hashtag ~ "\">"
+                ~ "<a href=\"" ~ obj.tags.segment_anchor_tag ~ ".xhtml" ~ hashtag ~ "\">"
                 ~ _txt
                 ~ "</a>" ~ "\n";
               }
               break;
             case DomTags.open :
               toc ~= markup.indent_by_spaces_provided(n, "  ") ~ "<ol>" ~ "\n";
-              if  (obj.heading_lev_markup < 4) {
+              if  (obj.node.heading_lev_markup < 4) {
                 toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "<li>" ~ "\n"
                 ~ markup.indent_by_spaces_provided((n + 2), "  ")
-                ~ "<a href=\"" ~ obj.segment_anchor_tag ~ ".xhtml" ~ "\">"
+                ~ "<a href=\"" ~ obj.tags.segment_anchor_tag ~ ".xhtml" ~ "\">"
                 ~ _txt
                 ~ "</a>" ~ "\n";
               } else {
-                string hashtag =(obj.heading_lev_markup == 4)
+                string hashtag =(obj.node.heading_lev_markup == 4)
                 ? ""
-                : ("#" ~ obj.ocn.to!string);
+                : ("#" ~ obj.node.ocn.to!string);
                 toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "<li>" ~ "\n"
                 ~ markup.indent_by_spaces_provided((n + 2), "  ")
-                ~ "<a href=\"" ~ obj.segment_anchor_tag ~ ".xhtml" ~ hashtag ~ "\">"
+                ~ "<a href=\"" ~ obj.tags.segment_anchor_tag ~ ".xhtml" ~ hashtag ~ "\">"
                 ~ _txt
                 ~ "</a>" ~ "\n";
               }
@@ -243,11 +243,11 @@ template outputEPub3() {
     );
     foreach (sect; doc_matters.xml.keys_seq.seg) {
       foreach (obj; doc_abstraction[sect]) {
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           string _txt = obj.text.replaceAll(rgx.inline_notes_al_gen, "").strip;
-          string hashtag =(obj.heading_lev_markup <= 4) ? "" : ("#" ~ obj.ocn.to!string);
+          string hashtag =(obj.node.heading_lev_markup <= 4) ? "" : ("#" ~ obj.node.ocn.to!string);
           foreach_reverse (k; 0 .. 7) {
-            switch (obj.dom_markedup[k]) {
+            switch (obj.node.dom_markedup[k]) {
             case DomTags.close :
               toc ~= "\n    </navPoint>";
               break;
@@ -262,7 +262,7 @@ template outputEPub3() {
       <content src="%s.xhtml%s" />¶",
                 counter,
                 _txt,
-                obj.segment_anchor_tag,
+                obj.tags.segment_anchor_tag,
                 hashtag,
               );
               break;
@@ -276,7 +276,7 @@ template outputEPub3() {
       <content src="%s.xhtml%s" />¶",
                 counter,
                 _txt,
-                obj.segment_anchor_tag,
+                obj.tags.segment_anchor_tag,
                 hashtag,
               );
               break;
@@ -310,12 +310,12 @@ template outputEPub3() {
     foreach (part; doc_matters.xml.keys_seq.seg) {
       foreach (obj; doc_abstraction[part]) {
         string _txt = xhtml_format.special_characters(obj, obj.text);
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           assert(part == "head" || "toc_seg" || "body" || "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-          switch (obj.heading_lev_markup) {
+          switch (obj.node.heading_lev_markup) {
           case 0: .. case 3:
             /+ fill buffer, and replace with new levels from 1 to 3 +/
-            switch (obj.heading_lev_markup) {
+            switch (obj.node.heading_lev_markup) {
             case 0:
               top_level_headings[0] = "";
               top_level_headings[1] = "";
@@ -335,16 +335,16 @@ template outputEPub3() {
               top_level_headings[3] = "";
               goto default;
             default:
-              doc_parts_ ~= obj.segment_anchor_tag;
-              doc_epub3[obj.segment_anchor_tag] ~= xhtml_format.epub3_seg_head(doc_matters);
+              doc_parts_ ~= obj.tags.segment_anchor_tag;
+              doc_epub3[obj.tags.segment_anchor_tag] ~= xhtml_format.epub3_seg_head(doc_matters);
               auto t = xhtml_format.heading_seg(obj, _txt, suffix, "epub");
-              doc_epub3[obj.segment_anchor_tag] ~= t[0];
-              doc_epub3_endnotes[obj.segment_anchor_tag] ~= t[1];
+              doc_epub3[obj.tags.segment_anchor_tag] ~= t[0];
+              doc_epub3_endnotes[obj.tags.segment_anchor_tag] ~= t[1];
               break;
             }
             break;
           case 4:
-            segment_filename = obj.segment_anchor_tag;
+            segment_filename = obj.tags.segment_anchor_tag;
             doc_epub3[segment_filename] ~= xhtml_format.epub3_seg_head(doc_matters);
             auto t = xhtml_format.heading_seg(obj, _txt, suffix, "epub");
             doc_epub3[segment_filename] ~= t[0];
@@ -357,23 +357,23 @@ template outputEPub3() {
             break;
           case 8: .. case 9:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a, ": ", obj.heading_lev_markup);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a, ": ", obj.node.heading_lev_markup);
               writeln(__FILE__, ":", __LINE__, ": ", obj.text);
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a, ": ", obj.heading_lev_markup);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a, ": ", obj.node.heading_lev_markup);
             }
             break;
           }
         } else {
           assert(part == "head" || "toc_seg" || "body" || "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-          switch (obj.of_part) {
+          switch (obj.typeinfo.of_part) {
           case "frontmatter":             assert(part == "head" || "toc_seg");
-            switch (obj.is_of) {
+            switch (obj.typeinfo.is_of) {
             case "para":
-              switch (obj.is_a) {
+              switch (obj.typeinfo.is_a) {
               case "toc":
                 auto t = xhtml_format.para_seg(obj, _txt, suffix, "epub");
                 doc_epub3[segment_filename] ~= t[0];
@@ -381,22 +381,22 @@ template outputEPub3() {
                 break;
               default:
                 if ((doc_matters.opt.action.debug_do)) {
-                  writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                  writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
                 }
                 break;
               }
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
               }
               break;
             }
             break;
           case "body":                    assert(part == "body");
-            switch (obj.is_of) {
+            switch (obj.typeinfo.is_of) {
             case "para":
-              switch (obj.is_a) {
+              switch (obj.typeinfo.is_a) {
               case "para":
                 auto t = xhtml_format.para_seg(obj, _txt, suffix, "epub");
                 doc_epub3[segment_filename] ~= t[0];
@@ -404,13 +404,13 @@ template outputEPub3() {
                 break;
               default:
                 if ((doc_matters.opt.action.debug_do)) {
-                  writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                  writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
                 }
                 break;
               }
               break;
             case "block":
-              switch (obj.is_a) {
+              switch (obj.typeinfo.is_a) {
               case "quote":
                 auto t = xhtml_format.quote_seg(obj, _txt, suffix, "epub");
                 doc_epub3[segment_filename] ~= t[0].to!string;
@@ -442,23 +442,23 @@ template outputEPub3() {
                 break;
               default:
                 if ((doc_matters.opt.action.debug_do)) {
-                  writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                  writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
                 }
                 break;
               }
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
               }
               break;
             }
             break;
           case "backmatter":
             assert(part == "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-            switch (obj.is_of) {
+            switch (obj.typeinfo.is_of) {
             case "para":
-              switch (obj.is_a) {
+              switch (obj.typeinfo.is_a) {
               case "endnote":             assert(part == "endnotes");
                 auto t = xhtml_format.para_seg(obj, _txt, suffix, "epub");
                 doc_epub3[segment_filename] ~= t[0];
@@ -485,14 +485,14 @@ template outputEPub3() {
                 break;
               default:
                 if ((doc_matters.opt.action.debug_do)) {
-                  writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                  writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
                 }
                 break;
               }
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
               }
               break;
             }
@@ -501,53 +501,53 @@ template outputEPub3() {
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.of_part);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.of_part);
             }
             break;
           }
         }
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           assert(obj.text.length > 0);
-          if (obj.heading_lev_markup <= 4) {
+          if (obj.node.heading_lev_markup <= 4) {
             oepbs_content_parts["manifest_documents"] ~=
               format(q"¶      <item id="%s.xhtml" href="%s.xhtml" media-type="application/xhtml+xml" />
   ¶",
-              obj.segment_anchor_tag,
-              obj.segment_anchor_tag,
+              obj.tags.segment_anchor_tag,
+              obj.tags.segment_anchor_tag,
             );
             oepbs_content_parts["spine"] ~=
               format(q"¶    <itemref idref="%s.xhtml" linear="yes" />
   ¶",
-              obj.segment_anchor_tag,
+              obj.tags.segment_anchor_tag,
             );
             oepbs_content_parts["guide"] ~=
               format(q"¶      <reference type="%s" href="%s" />
   ¶",
-              obj.segment_anchor_tag,
-              obj.segment_anchor_tag,
+              obj.tags.segment_anchor_tag,
+              obj.tags.segment_anchor_tag,
             );
-          } else if (obj.heading_lev_markup > 4) {
+          } else if (obj.node.heading_lev_markup > 4) {
             oepbs_content_parts["manifest_documents"] ~=
               format(q"¶      <item id="%s.xhtml#%s" href="%s.xhtml#%s" media-type="application/xhtml+xml" />
   ¶",
-              obj.segment_anchor_tag,
-              obj.obj_cite_number,
-              obj.segment_anchor_tag,
-              obj.obj_cite_number,
+              obj.tags.segment_anchor_tag,
+              obj.node.obj_cite_number,
+              obj.tags.segment_anchor_tag,
+              obj.node.obj_cite_number,
             );
             oepbs_content_parts["spine"] ~=
               format(q"¶    <itemref idref="%s.xhtml#%s" linear="yes" />
   ¶",
-              obj.segment_anchor_tag,
-              obj.obj_cite_number,
+              obj.tags.segment_anchor_tag,
+              obj.node.obj_cite_number,
             );
             oepbs_content_parts["guide"] ~=
               format(q"¶      <reference type="%s#%s" href="%s#%s" />
   ¶",
-              obj.segment_anchor_tag,
-              obj.obj_cite_number,
-              obj.segment_anchor_tag,
-              obj.obj_cite_number,
+              obj.tags.segment_anchor_tag,
+              obj.node.obj_cite_number,
+              obj.tags.segment_anchor_tag,
+              obj.node.obj_cite_number,
             );
           }
         }
diff --git a/src/sdp/output/html.d b/src/sdp/output/html.d
index ddd3c9f..6078c00 100644
--- a/src/sdp/output/html.d
+++ b/src/sdp/output/html.d
@@ -28,11 +28,11 @@ template outputHTML() {
       foreach (obj; doc_abstraction[part]) {
         delimit = xhtml_format.div_delimit(part, previous_part);
         string _txt = xhtml_format.special_characters(obj, obj.text);
-        switch (obj.of_part) {
+        switch (obj.typeinfo.of_part) {
         case "frontmatter":              assert(part == "head" || "toc_scroll");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "heading":
               doc_html ~= delimit ~ xhtml_format.heading_scroll(obj, _txt, suffix);
               break;
@@ -41,22 +41,22 @@ template outputHTML() {
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
           break;
         case "body":                     assert(part == "body" || "head"); // surprise
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "heading":
               doc_html ~= delimit ~ xhtml_format.heading_scroll(obj, _txt, suffix);
               break;
@@ -65,13 +65,13 @@ template outputHTML() {
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           case "block":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "quote":
               doc_html ~= xhtml_format.quote_scroll(obj, _txt);
               break;
@@ -94,23 +94,23 @@ template outputHTML() {
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
           break;
         case "backmatter":
           assert(part == "endnotes" || "glossary" || "bibliography" || "bookindex_scroll" || "blurb" || "tail");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "heading":
               doc_html ~= delimit ~ xhtml_format.heading_scroll(obj, _txt, suffix);
               break;
@@ -131,14 +131,14 @@ template outputHTML() {
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
@@ -147,8 +147,8 @@ template outputHTML() {
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.of_part);
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.of_part);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
             writeln(__FILE__, ":", __LINE__, ": ", obj.text);
           }
           break;
@@ -200,12 +200,12 @@ template outputHTML() {
       foreach (obj; doc_abstraction[part]) {
         delimit = xhtml_format.div_delimit(part, previous_part);
         string _txt = xhtml_format.special_characters(obj, obj.text);
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           assert(part == "head" || "toc_seg" || "body" || "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-          switch (obj.heading_lev_markup) {
+          switch (obj.node.heading_lev_markup) {
           case 0: .. case 3:
             /+ fill buffer, and replace with new levels from 1 to 3 +/
-            switch (obj.heading_lev_markup) {
+            switch (obj.node.heading_lev_markup) {
             case 0:
               top_level_headings[0] = "";
               top_level_headings[1] = "";
@@ -226,12 +226,12 @@ template outputHTML() {
               goto default;
             default:
               auto t = xhtml_format.heading_seg(obj, _txt, suffix, "seg");
-              top_level_headings[obj.heading_lev_markup] = t[0];
+              top_level_headings[obj.node.heading_lev_markup] = t[0];
               break;
             }
             break;
           case 4:
-            segment_filename = obj.segment_anchor_tag;
+            segment_filename = obj.tags.segment_anchor_tag;
             doc_html[segment_filename] ~= xhtml_format.html_head(doc_matters, "seg");
             auto navigation_bar = xhtml_format.nav_pre_next_svg(obj);
             doc_html[segment_filename] ~= navigation_bar.toc_pre_next; // navigation bar
@@ -252,45 +252,45 @@ template outputHTML() {
             break;
           case 8: .. case 9:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a, ": ", obj.heading_lev_markup);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a, ": ", obj.node.heading_lev_markup);
               writeln(__FILE__, ":", __LINE__, ": ", obj.text);
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a, ": ", obj.heading_lev_markup);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a, ": ", obj.node.heading_lev_markup);
             }
             break;
           }
         } else {
           assert(part == "head" || "toc_seg" || "body" || "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-          switch (obj.of_part) {
+          switch (obj.typeinfo.of_part) {
           case "frontmatter":             assert(part == "head" || "toc_seg");
-            switch (obj.is_of) {
+            switch (obj.typeinfo.is_of) {
             case "para":
-              switch (obj.is_a) {
+              switch (obj.typeinfo.is_a) {
               case "toc":
                 auto t = xhtml_format.para_seg(obj, _txt, suffix, "seg");
                 doc_html[segment_filename] ~= t[0].to!string;
                 break;
               default:
                 if ((doc_matters.opt.action.debug_do)) {
-                  writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                  writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
                 }
                 break;
               }
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           case "body":                    assert(part == "body");
-            switch (obj.is_of) {
+            switch (obj.typeinfo.is_of) {
             case "para":
-              switch (obj.is_a) {
+              switch (obj.typeinfo.is_a) {
               case "para":
                 auto t = xhtml_format.para_seg(obj, _txt, suffix, "seg");
                 doc_html[segment_filename] ~= t[0].to!string;
@@ -298,13 +298,13 @@ template outputHTML() {
                 break;
               default:
                 if ((doc_matters.opt.action.debug_do)) {
-                  writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                  writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
                 }
                 break;
               }
               break;
             case "block":
-              switch (obj.is_a) {
+              switch (obj.typeinfo.is_a) {
               case "quote":
                 auto t = xhtml_format.quote_seg(obj, _txt, suffix, "seg");
                 doc_html[segment_filename] ~= t[0].to!string;
@@ -336,23 +336,23 @@ template outputHTML() {
                 break;
               default:
                 if ((doc_matters.opt.action.debug_do)) {
-                  writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                  writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
                 }
                 break;
               }
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
               }
               break;
             }
             break;
           case "backmatter":
             assert(part == "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-            switch (obj.is_of) {
+            switch (obj.typeinfo.is_of) {
             case "para":
-              switch (obj.is_a) {
+              switch (obj.typeinfo.is_a) {
               case "endnote":             assert(part == "endnotes");
                 auto t = xhtml_format.para_seg(obj, _txt, suffix, "seg");
                 doc_html[segment_filename] ~= t[0];
@@ -379,14 +379,14 @@ template outputHTML() {
                 break;
               default:
                 if ((doc_matters.opt.action.debug_do)) {
-                  writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                  writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
                 }
                 break;
               }
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
               }
               break;
             }
@@ -395,7 +395,7 @@ template outputHTML() {
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.of_part);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.of_part);
             }
             break;
           }
diff --git a/src/sdp/output/sqlite.d b/src/sdp/output/sqlite.d
index e9667ae..f45eec6 100644
--- a/src/sdp/output/sqlite.d
+++ b/src/sdp/output/sqlite.d
@@ -246,7 +246,7 @@ template SQLiteFormatAndLoadObject() {
         string o = format(q"¶<p class="%s"><b>
             %s
           </b></p>¶",
-            obj.is_a,
+            obj.typeinfo.is_a,
             _txt,
           );
         return o;
@@ -255,13 +255,13 @@ template SQLiteFormatAndLoadObject() {
         auto return ref const O    obj,
       ) {
         string _txt = munge_html(obj);
-        _txt = (obj.bullet) ? ("●&#160;&#160;" ~ _txt) : _txt;
+        _txt = (obj.attrib.bullet) ? ("●&#160;&#160;" ~ _txt) : _txt;
         string o = format(q"¶<p class="%s" indent="h%si%s">
           %s
         </p>¶",
-            obj.is_a,
-            obj.indent_hang,
-            obj.indent_base,
+            obj.typeinfo.is_a,
+            obj.attrib.indent_hang,
+            obj.attrib.indent_base,
             _txt
           );
         return o;
@@ -273,7 +273,7 @@ template SQLiteFormatAndLoadObject() {
         string o = format(q"¶<p class="%s">
           %s
         </p>¶",
-            obj.is_a,
+            obj.typeinfo.is_a,
             _txt
           );
         return o;
@@ -285,7 +285,7 @@ template SQLiteFormatAndLoadObject() {
         string o = format(q"¶<p class="%s">
           %s
         </p>¶",
-            obj.is_a,
+            obj.typeinfo.is_a,
             _txt
           );
         return o;
@@ -296,7 +296,7 @@ template SQLiteFormatAndLoadObject() {
         string _txt = munge_html(obj);
         string o = format(q"¶
         <p class="%s">%s</p>¶",
-            obj.is_a,
+            obj.typeinfo.is_a,
             _txt.stripRight
           );
         return o;
@@ -306,7 +306,7 @@ template SQLiteFormatAndLoadObject() {
       ) {
         string _txt = munge_html(obj);
         string o = format(q"¶<p class="%s">%s</p>¶",
-            obj.is_a,
+            obj.typeinfo.is_a,
             _txt
           );
         return o;
@@ -316,7 +316,7 @@ template SQLiteFormatAndLoadObject() {
       ) {
         string _txt = html_special_characters_code(obj.text);
         string o = format(q"¶<p class="%s">%s</p>¶",
-            obj.is_a,
+            obj.typeinfo.is_a,
             _txt
           );
         return o;
@@ -340,14 +340,14 @@ template SQLiteFormatAndLoadObject() {
                 && (_table_rows.length <= row_idx+2)) { // check row_idx+2 (rather than == ++row_idx)
                   _tablenote ~= cell;
                 } else {
-                  string _col_is = (row_idx == 0 && obj.table_heading) ? "th" : "td";
+                  string _col_is = (row_idx == 0 && obj.table.heading) ? "th" : "td";
                   string _align = ("style=\"text-align:"
-                  ~ ((obj.table_column_aligns[col_idx] == "l")
+                  ~ ((obj.table.column_aligns[col_idx] == "l")
                   ? "left\"" : "right\""));
                   _table ~= "<"
                     ~ _col_is
                     ~ " width=\""
-                    ~ obj.table_column_widths[col_idx].to!string
+                    ~ obj.table.column_widths[col_idx].to!string
                     ~ "%\" "
                     ~ _align
                     ~ ">";
@@ -375,7 +375,7 @@ template SQLiteFormatAndLoadObject() {
           </table>
           %s
         </p>¶",
-          obj.is_a,
+          obj.typeinfo.is_a,
           _txt,
           _note
         );
@@ -888,12 +888,12 @@ template SQLiteInsertDocObjectsLoop() {
         );
       ¶",
         _metadata_tid,
-        obj.ocn,
+        obj.node.ocn,
         SQLinsertDelimiter!()(obj_txt["text"]),
         SQLinsertDelimiter!()(obj_txt["html"]),
-        obj.heading_lev_markup,
-        obj.is_of,
-        obj.is_a,
+        obj.node.heading_lev_markup,
+        obj.typeinfo.is_of,
+        obj.typeinfo.is_a,
       );
       return _insert_doc_objects_row;
     }
@@ -903,32 +903,32 @@ template SQLiteInsertDocObjectsLoop() {
     string[] _insert_doc_objects;
     foreach (part; doc_matters.xml.keys_seq.sql) {
       foreach (obj; doc_abstraction[part]) {
-        switch (obj.of_part) {
+        switch (obj.typeinfo.of_part) {
         case "frontmatter":              assert(part == "head", part);
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "heading":
               obj_txt = format_and_sqlite_load.heading(obj);
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
           break;
         case "body": //                    assert(part == "body", part); // TODO broken
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "heading":
               debug (asserts) { // TODO consider and fix or remove
                 if (part != "body") {
@@ -942,13 +942,13 @@ template SQLiteInsertDocObjectsLoop() {
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           case "block":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "quote":
               obj_txt = format_and_sqlite_load.quote(obj);
               break;
@@ -971,23 +971,23 @@ template SQLiteInsertDocObjectsLoop() {
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
           break;
         case "backmatter":
           assert(part == "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail", part);
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "heading":
               obj_txt = format_and_sqlite_load.heading(obj);
               break;
@@ -1005,14 +1005,14 @@ template SQLiteInsertDocObjectsLoop() {
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
@@ -1021,28 +1021,28 @@ template SQLiteInsertDocObjectsLoop() {
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.of_part); // check where empty value could come from
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.of_part); // check where empty value could come from
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
             writeln(__FILE__, ":", __LINE__, ": ", obj.text); // check where empty value could come from
           }
           break;
         }
-        if (obj.is_a == "heading") {
+        if (obj.typeinfo.is_a == "heading") {
           if ((doc_matters.opt.action.verbose)) {
             writeln(
-              "markup: ", obj.heading_lev_markup,
-              "> ", obj.dom_markedup,
-              "; collapsed: ", obj.heading_lev_collapsed,
-              "> ", obj.dom_collapsed,
-              "; ocn: ", obj.ocn,
-              " node: ", obj.node,
-              "; parent: ", obj.parent_lev_markup,
-              "; ocn: ", obj.parent_ocn,
+              "markup: ", obj.node.heading_lev_markup,
+              "> ", obj.node.dom_markedup,
+              "; collapsed: ", obj.node.heading_lev_collapsed,
+              "> ", obj.node.dom_collapsed,
+              "; ocn: ", obj.node.ocn,
+              " node: ", obj.node.node,
+              "; parent: ", obj.node.parent_lev_markup,
+              "; ocn: ", obj.node.parent_ocn,
               "; ",
             );
           }
         }
-        if (!(obj.is_a == "comment")) {
+        if (!(obj.typeinfo.is_a == "comment")) {
           _insert_doc_objects ~= insertDocObjectsRow(obj);
         }
       } // loop closes
diff --git a/src/sdp/output/xmls.d b/src/sdp/output/xmls.d
index 785d87e..cc08bfe 100644
--- a/src/sdp/output/xmls.d
+++ b/src/sdp/output/xmls.d
@@ -60,7 +60,7 @@ template outputXHTMLs() {
         .replaceAll(rgx.xhtml_less_than,    "&#60;")
         .replaceAll(rgx.xhtml_greater_than, "&#62;")
         .replaceAll(rgx.nbsp_char,          " ");
-      if (!(obj.is_a == "code")) {
+      if (!(obj.typeinfo.is_a == "code")) {
         _txt = (_txt)
           .replaceAll(rgx.xhtml_line_break,   "<br />");
       }
@@ -340,7 +340,7 @@ template outputXHTMLs() {
       string                  _suffix    = ".html",
       string                  _xml_type = "seg",
     ) {
-      if (obj.inline_links) {
+      if (obj.has.inline_links) {
         if ((_txt.match(rgx.mark_internal_site_lnk))
         && (_xml_type == "scroll")) { // conditions reversed to avoid: gdc compiled program run segfault
           _txt = (_txt).replaceAll(
@@ -362,8 +362,8 @@ template outputXHTMLs() {
         if (_txt.match(rgx.inline_link)) {
           writeln(__LINE__,
             " (missed) markup link identified (",
-            obj.inline_links,
-            "): ", obj.is_a, ": ",
+            obj.has.inline_links,
+            "): ", obj.typeinfo.is_a, ": ",
             obj.text
           );
         }
@@ -372,8 +372,8 @@ template outputXHTMLs() {
         if (_txt.match(rgx.inline_link)) {
           writeln(__LINE__,
             " (missed) markup link identified (",
-            obj.inline_links,
-            "): ", obj.is_a, ": ",
+            obj.has.inline_links,
+            "): ", obj.typeinfo.is_a, ": ",
             obj.text
           );
         }
@@ -384,7 +384,7 @@ template outputXHTMLs() {
       auto return ref const O   obj,
       string                    _txt,
     ) {
-      if (obj.inline_notes_reg) {
+      if (obj.has.inline_notes_reg) {
         _txt = font_face(_txt);
         _txt = (_txt).replaceAll(
           rgx.inline_notes_delimiter_al_regular_number_note,
@@ -393,12 +393,12 @@ template outputXHTMLs() {
       }
       debug(markup_endnotes) {
         if (_txt.match(rgx.inline_notes_delimiter_al_regular_number_note)) {
-          writeln(__LINE__, " (missed) markup endnote: ", obj.is_a, ": ", obj.text);
+          writeln(__LINE__, " (missed) markup endnote: ", obj.typeinfo.is_a, ": ", obj.text);
         }
       }
       debug(markup) {
         if (_txt.match(rgx.inline_notes_delimiter_al_regular_number_note)) {
-          writeln(__LINE__, " (missed) markup endnote: ", obj.is_a, ": ", obj.text);
+          writeln(__LINE__, " (missed) markup endnote: ", obj.typeinfo.is_a, ": ", obj.text);
         }
       }
       return _txt;
@@ -408,7 +408,7 @@ template outputXHTMLs() {
       string                      _txt,
     ) {
       string[] _endnotes;
-      if (obj.inline_notes_reg) {
+      if (obj.has.inline_notes_reg) {
         _txt = font_face(_txt);
         /+ need markup for text, and separated footnote +/
         foreach(m; _txt.matchAll(rgx.inline_notes_delimiter_al_regular_number_note)) {
@@ -433,7 +433,7 @@ template outputXHTMLs() {
         );
       } else if (_txt.match(rgx.inline_notes_delimiter_al_regular_number_note)) {
         debug(markup) {
-          writeln(__LINE__, " endnote: ", obj.is_a, ": ", obj.text);
+          writeln(__LINE__, " endnote: ", obj.typeinfo.is_a, ": ", obj.text);
         }
       }
       auto t = tuple(
@@ -468,7 +468,7 @@ template outputXHTMLs() {
     ) {
       char[] lev4_subtoc;
       lev4_subtoc ~= "  <div class=\"nav\">\n";
-      foreach (subtoc; obj.lev4_subtoc) {
+      foreach (subtoc; obj.tags.lev4_subtoc) {
         if (auto m = subtoc.match(rgx.inline_link_subtoc)) {
           auto indent = m.captures[1].to!string;
           auto text = m.captures[2].to!string;
@@ -493,7 +493,7 @@ template outputXHTMLs() {
       auto return ref const O    obj,
     ) {
       string prev, next, toc;
-      if (obj.segment_anchor_tag == "toc") {
+      if (obj.tags.segment_anchor_tag == "toc") {
         toc = "";
         prev = "";
       } else {
@@ -506,7 +506,7 @@ template outputXHTMLs() {
             </a>¶",
         );
       }
-      if (obj.segname_prev == "") {
+      if (obj.tags.segname_prev == "") {
         prev = "";
       } else {
         prev = format(q"¶<a href="%s.html" target="_top">
@@ -516,10 +516,10 @@ template outputXHTMLs() {
                 </svg>
               </div>
             </a>¶",
-          obj.segname_prev,
+          obj.tags.segname_prev,
         );
       }
-      if (obj.segname_next == "") {
+      if (obj.tags.segname_next == "") {
         next = "";
       } else {
         next = format(q"¶<a href="%s.html" target="_top">
@@ -529,7 +529,7 @@ template outputXHTMLs() {
                 </svg>
               </div>
             </a>¶",
-          obj.segname_next,
+          obj.tags.segname_next,
         );
       }
       string _toc_pre_next = format(q"¶        <div class="flex-menu-option">
@@ -571,15 +571,15 @@ template outputXHTMLs() {
       string                     _txt,
       string                     _xml_type = "html",
     ) {
-      auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+      auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
       string _horizontal_rule = "<hr />";
       if ((_xml_type != "html")
-      || (obj.heading_lev_markup == 0 || obj.heading_lev_markup > 4)) {
+      || (obj.node.heading_lev_markup == 0 || obj.node.heading_lev_markup > 4)) {
         _horizontal_rule = "";
       }
       _txt = font_face(_txt);
       string o;
-      if (obj.obj_cite_number.empty) {
+      if (obj.node.obj_cite_number.empty) {
         o = format(q"¶%s
       <div class="substance">
         <h%s class="%s">%s
@@ -587,11 +587,11 @@ template outputXHTMLs() {
         </h%s>
       </div>¶",
           _horizontal_rule,
-          obj.heading_lev_markup,
-          obj.is_a,
+          obj.node.heading_lev_markup,
+          obj.typeinfo.is_a,
           tags,
           _txt,
-          obj.heading_lev_markup,
+          obj.node.heading_lev_markup,
         );
       } else {
         o = format(q"¶%s
@@ -602,15 +602,15 @@ template outputXHTMLs() {
         </h%s>
       </div>¶",
         _horizontal_rule,
-        obj.obj_cite_number,
-        obj.obj_cite_number,
-        obj.heading_lev_markup,
-        obj.is_a,
-        obj.obj_cite_number,
-        obj.obj_cite_number,
+        obj.node.obj_cite_number,
+        obj.node.obj_cite_number,
+        obj.node.heading_lev_markup,
+        obj.typeinfo.is_a,
+        obj.node.obj_cite_number,
+        obj.node.obj_cite_number,
         tags,
         _txt,
-        obj.heading_lev_markup,
+        obj.node.heading_lev_markup,
         );
       }
       return o;
@@ -620,7 +620,7 @@ template outputXHTMLs() {
       string                     _txt,
       string                     _suffix = ".html",
     ) {
-      auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+      auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
       _txt = inline_markup_scroll(obj, _txt, _suffix);
       string o = heading(obj, _txt);
       return o;
@@ -645,19 +645,19 @@ template outputXHTMLs() {
       auto return ref const O    obj,
       string                     _txt,
     ) {
-      auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+      auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
       _txt = font_face(_txt);
       string o;
-      _txt = (obj.bullet) ? ("●&#160;&#160;" ~ _txt) : _txt;
-      if (obj.obj_cite_number.empty) {
+      _txt = (obj.attrib.bullet) ? ("●&#160;&#160;" ~ _txt) : _txt;
+      if (obj.node.obj_cite_number.empty) {
         o = format(q"¶  <div class="substance">
       <p class="%s" indent="h%si%s">%s
         %s
       </p>
     </div>¶",
-          obj.is_a,
-          obj.indent_hang,
-          obj.indent_base,
+          obj.typeinfo.is_a,
+          obj.attrib.indent_hang,
+          obj.attrib.indent_base,
           tags,
           _txt
         );
@@ -668,12 +668,12 @@ template outputXHTMLs() {
         %s
       </p>
     </div>¶",
-          obj.obj_cite_number,
-          obj.obj_cite_number,
-          obj.is_a,
-          obj.indent_hang,
-          obj.indent_base,
-          obj.obj_cite_number,
+          obj.node.obj_cite_number,
+          obj.node.obj_cite_number,
+          obj.typeinfo.is_a,
+          obj.attrib.indent_hang,
+          obj.attrib.indent_base,
+          obj.node.obj_cite_number,
           tags,
           _txt
         );
@@ -685,7 +685,7 @@ template outputXHTMLs() {
       string                     _txt,
       string                     _suffix = ".html",
     ) {
-      auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+      auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
       _txt = inline_markup_scroll(obj, _txt, _suffix);
       string o = para(obj, _txt);
       return o;
@@ -712,13 +712,13 @@ template outputXHTMLs() {
     ) {
       _txt = font_face(_txt);
       string o;
-      if (obj.obj_cite_number.empty) {
+      if (obj.node.obj_cite_number.empty) {
         o = format(q"¶  <div class="substance">
       <p class="%s">
         %s
       </p>
     </div>¶",
-          obj.is_a,
+          obj.typeinfo.is_a,
           _txt
         );
       } else {
@@ -728,10 +728,10 @@ template outputXHTMLs() {
         %s
       </p>
     </div>¶",
-          obj.obj_cite_number,
-          obj.obj_cite_number,
-          obj.is_a,
-          obj.obj_cite_number,
+          obj.node.obj_cite_number,
+          obj.node.obj_cite_number,
+          obj.typeinfo.is_a,
+          obj.node.obj_cite_number,
           _txt
         );
       }
@@ -742,7 +742,7 @@ template outputXHTMLs() {
       string                     _txt,
       string                     _suffix = ".html",
     ) {
-      auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+      auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
       _txt = inline_markup_scroll(obj, _txt, _suffix);
       string o = quote(obj, _txt);
       return o;
@@ -769,13 +769,13 @@ template outputXHTMLs() {
     ) {
       _txt = font_face(_txt);
       string o;
-      if (obj.obj_cite_number.empty) {
+      if (obj.node.obj_cite_number.empty) {
         o = format(q"¶  <div class="substance">
       <p class="%s">
         %s
       </p>
     </div>¶",
-          obj.is_a,
+          obj.typeinfo.is_a,
           _txt
         );
       } else {
@@ -785,10 +785,10 @@ template outputXHTMLs() {
         %s
       </p>
     </div>¶",
-          obj.obj_cite_number,
-          obj.obj_cite_number,
-          obj.is_a,
-          obj.obj_cite_number,
+          obj.node.obj_cite_number,
+          obj.node.obj_cite_number,
+          obj.typeinfo.is_a,
+          obj.node.obj_cite_number,
           _txt
         );
       }
@@ -800,7 +800,7 @@ template outputXHTMLs() {
       string                     _suffix = ".html",
       string                     _xml_type = "html",
     ) {
-      auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+      auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
       _txt = inline_markup_scroll(obj, _txt, _suffix);
       string o = group(obj, _txt);
       return o;
@@ -827,11 +827,11 @@ template outputXHTMLs() {
     ) {
       _txt = font_face(_txt);
       string o;
-      if (obj.obj_cite_number.empty) {
+      if (obj.node.obj_cite_number.empty) {
         o = format(q"¶  <div class="substance">
       <p class="%s">%s</p>
     </div>¶",
-          obj.is_a,
+          obj.typeinfo.is_a,
           _txt.stripRight
         );
       } else {
@@ -839,10 +839,10 @@ template outputXHTMLs() {
       <label class="ocn"><a href="#%s" class="lnkocn">%s</a></label>
       <p class="%s" id="%s">%s</p>
     </div>¶",
-          obj.obj_cite_number,
-          obj.obj_cite_number,
-          obj.is_a,
-          obj.obj_cite_number,
+          obj.node.obj_cite_number,
+          obj.node.obj_cite_number,
+          obj.typeinfo.is_a,
+          obj.node.obj_cite_number,
           _txt.stripRight
         );
       }
@@ -854,7 +854,7 @@ template outputXHTMLs() {
       string                     _suffix = ".html",
       string                     _xml_type = "html",
     ) {
-      auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+      auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
       _txt = inline_markup_scroll(obj, _txt, _suffix);
       string o = block(obj, _txt);
       return o;
@@ -881,11 +881,11 @@ template outputXHTMLs() {
     ) {
       _txt = font_face(_txt);
       string o;
-      if (obj.obj_cite_number.empty) {
+      if (obj.node.obj_cite_number.empty) {
           o = format(q"¶  <div class="substance">
             <p class="%s">%s</p>
         </div>¶",
-          obj.is_a,
+          obj.typeinfo.is_a,
           _txt
         );
       } else {
@@ -893,10 +893,10 @@ template outputXHTMLs() {
           <label class="ocn"><a href="#%s" class="lnkocn">%s</a></label>
           <p class="%s" id="%s">%s</p>
         </div>¶",
-          obj.obj_cite_number,
-          obj.obj_cite_number,
-          obj.is_a,
-          obj.obj_cite_number,
+          obj.node.obj_cite_number,
+          obj.node.obj_cite_number,
+          obj.typeinfo.is_a,
+          obj.node.obj_cite_number,
           _txt
         );
       }
@@ -908,7 +908,7 @@ template outputXHTMLs() {
       string                     _suffix = ".html",
       string                     _xml_type = "html",
     ) {
-      auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+      auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
       _txt = inline_markup_scroll(obj, _txt, _suffix);
       string o = verse(obj, _txt);
       return o;
@@ -945,11 +945,11 @@ template outputXHTMLs() {
             && (_table_rows.length <= row_idx+2)) {
               _tablenote ~= cell;
             } else {
-              string _col_is = (row_idx == 0 && obj.table_heading) ? "th" : "td";
+              string _col_is = (row_idx == 0 && obj.table.heading) ? "th" : "td";
               string _align = ("style=\"text-align:"
-              ~ ((obj.table_column_aligns[col_idx] == "l")
+              ~ ((obj.table.column_aligns[col_idx] == "l")
               ? "left\"" : "right\""));
-              _table ~= "<" ~ _col_is ~ " width=\"" ~ obj.table_column_widths[col_idx].to!string ~ "%\" " ~ _align ~ ">";
+              _table ~= "<" ~ _col_is ~ " width=\"" ~ obj.table.column_widths[col_idx].to!string ~ "%\" " ~ _align ~ ">";
               _table ~= cell;
               _table ~= "</" ~ _col_is ~ ">";
             }
@@ -966,7 +966,7 @@ template outputXHTMLs() {
       auto return ref const O    obj,
       string                     _txt,
     ) {
-      auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+      auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
       _txt = font_face(_txt);
       auto t = tablarize(obj, _txt);
       _txt = t[0];
@@ -981,10 +981,10 @@ template outputXHTMLs() {
         %s
       </p>
     </div>¶",
-        obj.obj_cite_number,
-        obj.obj_cite_number,
-        obj.is_a,
-        obj.obj_cite_number,
+        obj.node.obj_cite_number,
+        obj.node.obj_cite_number,
+        obj.typeinfo.is_a,
+        obj.node.obj_cite_number,
         tags,
         _txt,
         _note
@@ -999,9 +999,9 @@ template outputXHTMLs() {
       o = format(q"¶    <p class="%s" indent="h%si%s">
       %s
     </p>¶",
-        obj.is_a,
-        obj.indent_hang,
-        obj.indent_base,
+        obj.typeinfo.is_a,
+        obj.attrib.indent_hang,
+        obj.attrib.indent_base,
         _txt
       );
       return o;
@@ -1011,11 +1011,11 @@ template outputXHTMLs() {
       string                   _txt,
     ) {
       string o;
-      if (obj.obj_cite_number.empty) {
+      if (obj.node.obj_cite_number.empty) {
           o = format(q"¶  <div class="substance">
         <p class="%s">%s</p>
     </div>¶",
-          obj.is_a,
+          obj.typeinfo.is_a,
           _txt
         );
       } else {
@@ -1023,10 +1023,10 @@ template outputXHTMLs() {
       <label class="ocn"><a href="#%s" class="lnkocn">%s</a></label>
       <p class="%s" id="%s">%s</p>
     </div>¶",
-          obj.obj_cite_number,
-          obj.obj_cite_number,
-          obj.is_a,
-          obj.obj_cite_number,
+          obj.node.obj_cite_number,
+          obj.node.obj_cite_number,
+          obj.typeinfo.is_a,
+          obj.node.obj_cite_number,
           _txt
         );
       }
diff --git a/src/sdp/sdp.d b/src/sdp/sdp.d
index c5ee70a..0093f74 100755
--- a/src/sdp/sdp.d
+++ b/src/sdp/sdp.d
@@ -32,7 +32,6 @@ homepage    "http://sisudoc.org"
 void main(string[] args) {
   mixin SiSUrgxInit;
   mixin contentJSONtoSiSUstruct;
-  mixin SiSUnode;
   mixin SiSUbiblio;
   mixin SiSUrgxInitFlags;
   mixin outputHub;
diff --git a/views/version.txt b/views/version.txt
index 1c0b9d5..45dcb3b 100644
--- a/views/version.txt
+++ b/views/version.txt
@@ -4,7 +4,7 @@ struct Version {
   int minor;
   int patch;
 }
-enum ver = Version(0, 26, 2);
+enum ver = Version(0, 26, 3);
 version (Posix) {
   version (DigitalMars) {
   } else version (LDC) {