0.18.0 rename meta from ao (considered adr)

1 files changed, 5590 insertions, 0 deletions

diff --git a/src/sdp/meta/metadoc_from_src.d b/src/sdp/meta/metadoc_from_src.d
new file mode 100644
index 0000000..ab7f883
--- /dev/null
+++ b/src/sdp/meta/metadoc_from_src.d
@@ -0,0 +1,5590 @@
+/++
+  document abstraction:
+  abstraction of sisu markup for downstream processing
+  meta_metadoc_from_src.d
++/
+module sdp.meta.metadoc_from_src;
+template SiSUdocAbstraction() {
+  /+ ↓ abstraction imports +/
+  import sdp.meta;
+  import
+    std.algorithm,
+    std.container,
+    std.file,
+    std.json,
+    std.path;
+  import
+    sdp.meta.defaults,
+    sdp.meta.object_setter,
+    sdp.meta.rgx;
+  /+ ↓ abstraction mixins +/
+  mixin ObjectSetter;
+  mixin InternalMarkup;
+  mixin SiSUrgxInit;
+  /+ ↓ abstraction struct init +/
+  /+ initialize +/
+  ObjGenericComposite[][string] the_table_of_contents_section;
+  ObjGenericComposite[] the_document_head_section, the_document_body_section, the_bibliography_section, the_glossary_section, the_blurb_section;
+  ObjGenericComposite[] the_dom_tail_section;
+  string[string] an_object, processing;
+  string an_object_key;
+  string[] anchor_tags;
+  string anchor_tag_;
+  string segment_anchor_tag_that_object_belongs_to;
+  string segment_anchor_tag_that_object_belongs_to_uri;
+  /+ enum +/
+  enum State { off, on }
+  enum TriState { off, on, closing }
+  enum DocStructMarkupHeading {
+    h_sect_A,
+    h_sect_B,
+    h_sect_C,
+    h_sect_D,
+    h_text_1,
+    h_text_2,
+    h_text_3,
+    h_text_4,
+    h_text_5, // extra level, drop
+    content_non_header
+  } // header section A-D; header text 1-4
+  /+ biblio variables +/
+  string biblio_tag_name, biblio_tag_entry, st;
+  string[] biblio_arr_json;
+  string biblio_entry_str_json;
+  JSONValue[] bib_arr_json;
+  int bib_entry;
+  /+ counters +/
+  int cntr, previous_count, previous_length;
+  bool reset_note_numbers=true;
+  int[string] line_occur;
+  int html_segnames_ptr=0;
+  int html_segnames_ptr_cntr=0;
+  int verse_line, heading_ptr;
+  /+ paragraph attributes +/
+  int[string] indent;
+  bool bullet = true;
+  string content_non_header = "8";
+  auto obj_im = ObjInlineMarkup();
+  auto obj_att = ObjAttributes();
+  /+ ocn +/
+  int obj_cite_number, obj_cite_number_;
+  auto object_citation_number = OCNemitter();
+  int[] dom_markedup = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
+  int[] dom_markedup_buffer = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
+  int[] dom_collapsed = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
+  int[] dom_collapsed_buffer = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
+  enum DomTags { none, open, close, close_and_open, open_still, }
+  auto obj_heading_ancestors(O)(
+    O          obj,
+    string[]   lv_ancestors_txt,
+  ) {
+    switch (obj.heading_lev_markup) {
+    case 0:
+      lv_ancestors_txt[0] = obj.text.to!string;
+      foreach(k; 1..8) {
+        lv_ancestors_txt[k] = "";
+      }
+      goto default;
+    case 1:
+      lv_ancestors_txt[1] = obj.text.to!string;
+      foreach(k; 2..8) {
+        lv_ancestors_txt[k] = "";
+      }
+      goto default;
+    case 2:
+      lv_ancestors_txt[2] = obj.text.to!string;
+      foreach(k; 3..8) {
+        lv_ancestors_txt[k] = "";
+      }
+      goto default;
+    case 3:
+      lv_ancestors_txt[3] = obj.text.to!string;
+      foreach(k; 4..8) {
+        lv_ancestors_txt[k] = "";
+      }
+      goto default;
+    case 4:
+      lv_ancestors_txt[4] = obj.text.to!string;
+      foreach(k; 5..8) {
+        lv_ancestors_txt[k] = "";
+      }
+      goto default;
+    case 5:
+      lv_ancestors_txt[5] = obj.text.to!string;
+      foreach(k; 6..8) {
+        lv_ancestors_txt[k] = "";
+      }
+      goto default;
+    case 6:
+      lv_ancestors_txt[6] = obj.text.to!string;
+      lv_ancestors_txt[7] = "";
+      goto default;
+    case 7:
+      lv_ancestors_txt[7] = obj.text.to!string;
+      goto default;
+    default:
+      obj.heading_ancestors_text = lv_ancestors_txt.dup;
+    }
+    return obj;
+  }
+  auto obj_dom_set_markup_tags(O)(
+    O           obj,
+    int[]       dom,
+    int         lev
+  ) {
+    foreach (i; 0 .. 8) {
+      if (i < lev) {
+        if (dom[i] == DomTags.open
+           || dom[i] == DomTags.close_and_open
+        ) {
+          dom[i] = DomTags.open_still;
+        } else if (dom[i] == DomTags.close) {
+          dom[i] = DomTags.none;
+        }
+      } else if (i == lev) {
+        if (lev  == 0
+          && dom[i] == DomTags.open_still
+        ) {
+          dom[i] = DomTags.close;
+        } else if (dom[i] == DomTags.open
+          || dom[i] == DomTags.open_still
+          || dom[i] == DomTags.close_and_open
+        ) {
+          dom[i] = DomTags.close_and_open;
+        } else {
+          dom[i] = DomTags.open;
+        }
+      } else if (i > lev) {
+        if (dom[i] == DomTags.close) {
+          dom[i] = DomTags.none;
+        } else if (dom[i] == DomTags.open
+          || dom[i] == DomTags.open_still
+          || dom[i] == DomTags.close_and_open
+        ) {
+          dom[i] = DomTags.close;
+        }
+      }
+    }
+    debug(dom_magic_numbers) {
+      writeln("marked up: ", lev, ": ", dom);
+    }
+    obj.dom_markedup = dom.dup;
+    return obj;
+  }
+  auto obj_dom_set_collapsed_tags(O)(
+    O           obj,
+    int[]       dom,
+    int         lev
+  ) {
+    foreach (i; 0 .. 8) {
+      if (i < lev) {
+        if (dom[i] == DomTags.open
+           || dom[i] == DomTags.close_and_open
+        ) {
+          dom[i] = DomTags.open_still;
+        } else if (dom[i] == DomTags.close) {
+          dom[i] = DomTags.none;
+        }
+      } else if (i == lev) {
+        if (lev  == 0
+          && dom[i] == DomTags.open_still
+        ) {
+          dom[i] = DomTags.close;
+        } else if (dom[i] == DomTags.open
+          || dom[i] == DomTags.open_still
+          || dom[i] == DomTags.close_and_open
+        ) {
+          dom[i] = DomTags.close_and_open;
+        } else {
+          dom[i] = DomTags.open;
+        }
+      } else if (i > lev) {
+        if (dom[i] == DomTags.close) {
+          dom[i] = DomTags.none;
+        } else if (dom[i] == DomTags.open
+          || dom[i] == DomTags.open_still
+          || dom[i] == DomTags.close_and_open
+        ) {
+          dom[i] = DomTags.close;
+        }
+      }
+    }
+    debug(dom_magic_numbers) {
+      writeln("collapsed: ", lev, ": ", dom);
+    }
+    obj.dom_collapsed = dom.dup;
+    return obj;
+  }
+  int ocn_emit(int ocn_status_flag) {
+    return object_citation_number.ocn_emitter(ocn_status_flag);
+  }
+  /+ book index variables +/
+  string book_idx_tmp;
+  string[][string][string] bookindex_unordered_hashes;
+  /+ node +/
+  ObjGenericComposite comp_obj_heading, comp_obj_location, comp_obj_block, comp_obj_code, comp_obj_poem_ocn, comp_obj_comment;
+  auto node_construct = NodeStructureMetadata();
+  enum sObj { content, anchor_tags, notes_reg, notes_star, links }
+  /+ ↓ abstract marked up document +/
+  auto SiSUdocAbstraction(Src,Make,Meta,Opt)(
+    Src                  markup_sourcefile_content,
+    Make                 dochead_make_aa,
+    Meta                 dochead_meta_aa,
+    Opt                  opt_action,
+  ) {
+    auto rgx = Rgx();
+    debug(asserts) {
+      static assert(is(typeof(markup_sourcefile_content) == char[][]));
+      static assert(is(typeof(dochead_make_aa)           == string[string][string]));
+      static assert(is(typeof(dochead_meta_aa)           == string[string][string]));
+      static assert(is(typeof(opt_action)                == bool[string]));
+    }
+    /+ ↓ abstraction init +/
+    scope(success) {
+    }
+    scope(failure) {
+    }
+    scope(exit) {
+      destroy(the_document_head_section);
+      destroy(the_table_of_contents_section);
+      destroy(the_document_body_section);
+      destroy(the_bibliography_section);
+      destroy(an_object);
+      destroy(processing);
+      destroy(biblio_arr_json);
+      previous_length=0;
+      reset_note_numbers=true;
+    }
+    mixin SiSUrgxInitFlags;
+    mixin SiSUnode;
+    auto node_para_int_    = node_metadata_para_int;
+    auto node_para_str_    = node_metadata_para_str;
+    ObjGenericComposite comp_obj_heading_, comp_obj_para, comp_obj_toc;
+    line_occur = [
+      "heading"  : 0,
+      "para"     : 0,
+      "glossary" : 0,
+      "blurb"    : 0,
+    ];
+    auto type = flags_type_init;
+    string[string] obj_cite_number_poem = [
+      "start" : "",
+      "end"   : ""
+    ];
+    string[] lv_ancestors_txt = [ "", "", "", "", "", "", "", "", ];
+    int[string] lv = [
+      "lv" : State.off,
+      "h0" : State.off,
+      "h1" : State.off,
+      "h2" : State.off,
+      "h3" : State.off,
+      "h4" : State.off,
+      "h5" : State.off,
+      "h6" : State.off,
+      "h7" : State.off,
+      "lev_int_collapsed" : 0,
+    ];
+    int[string] collapsed_lev = [
+      "h0" : State.off,
+      "h1" : State.off,
+      "h2" : State.off,
+      "h3" : State.off,
+      "h4" : State.off,
+      "h5" : State.off,
+      "h6" : State.off,
+      "h7" : State.off
+    ];
+    string[string] heading_match_str = [
+      "h_A": "^(none)",
+      "h_B": "^(none)",
+      "h_C": "^(none)",
+      "h_D": "^(none)",
+      "h_1": "^(none)",
+      "h_2": "^(none)",
+      "h_3": "^(none)",
+      "h_4": "^(none)"
+    ];
+    auto heading_match_rgx = [
+      "h_A": regex(r"^(none)"),
+      "h_B": regex(r"^(none)"),
+      "h_C": regex(r"^(none)"),
+      "h_D": regex(r"^(none)"),
+      "h_1": regex(r"^(none)"),
+      "h_2": regex(r"^(none)"),
+      "h_3": regex(r"^(none)"),
+      "h_4": regex(r"^(none)")
+    ];
+    string _anchor_tag;
+    string toc_txt_;
+    an_object["glossary_nugget"] = "";
+    an_object["blurb_nugget"] = "";
+    comp_obj_heading_                       = comp_obj_heading_.init;
+    comp_obj_heading_.use                   = "frontmatter";
+    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_.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_;
+    html_segnames_ptr_cntr++;
+    the_table_of_contents_section = [
+      "seg": [toc_head],
+      "scroll": [toc_head],
+    ];
+    auto mkup = InlineMarkup();
+    auto munge = ObjInlineMarkupMunge();
+    auto note_section = NotesSection();
+    auto bookindex_extract_hash = BookIndexNuggetHash();
+    string[][string] lev4_subtoc;
+    string[] html_segnames=["toc"];
+    int cnt1 = 1; int cnt2 = 1; int cnt3 = 1;
+    /+ abstraction init ↑ +/
+    /+ ↓ loop markup document/text line by line +/
+    srcDocLoop:
+    foreach (line; markup_sourcefile_content) {
+      /+ ↓ markup document/text line by line +/
+      /+ scope +/
+      scope(exit) {
+      }
+      scope(failure) {
+        stderr.writefln(
+          "%s\n%s\n%s:%s failed here:\n  line: %s",
+          __MODULE__, __FUNCTION__,
+          __FILE__, __LINE__,
+          line,
+        );
+      }
+      line = (line).replaceAll(rgx.true_dollar, "$$$$");
+        /+ dollar represented as $$ needed to stop submatching on $
+           (substitutions using ${identifiers} must take into account (i.e. happen earlier))
+         +/
+      debug(source) {                                  // source lines
+        writeln(line);
+      }
+      debug(srclines) {
+        if (!line.empty) {                             // source lines, not empty
+          writefln(
+            "* %s",
+            line
+          );
+        }
+      }
+      if (!line.empty) {
+        _check_ocn_status_(line, type);
+      }
+      if (type["code"] == TriState.on) {
+        /+ block object: code +/
+        _code_block_(line, an_object, type);
+        continue;
+      } else if (!matchFirst(line, rgx.skip_from_regular_parse)) {
+        /+ object other than "code block" object
+           (includes regular text paragraph, headings & blocks other than code) +/
+        /+ heading, glossary, blurb, poem, group, block, quote, table +/
+        if (line.matchFirst(rgx.heading_biblio)
+        || (type["biblio_section"] == State.on
+        && (!(line.matchFirst(rgx.heading_blurb_glossary)))
+        && (!(line.matchFirst(rgx.heading)))
+        && (!(line.matchFirst(rgx.comment))))) {
+          /+ within section (block object): biblio +/
+          type["glossary_section"] = State.off;
+          type["biblio_section"] = State.on;
+          type["blurb_section"] = State.off;
+          if (opt_action["backmatter"] && opt_action["section_biblio"]) {
+            _biblio_block_(line, type, bib_entry, biblio_entry_str_json, biblio_arr_json);
+            debug(bibliobuild) {
+              writeln("-  ", biblio_entry_str_json);
+              writeln("-> ", biblio_arr_json.length);
+            }
+          }
+          continue;
+        } else if (line.matchFirst(rgx.heading_glossary)
+        || (type["glossary_section"] == State.on
+        && (!(line.matchFirst(rgx.heading_biblio_blurb)))
+        && (!(line.matchFirst(rgx.heading)))
+        && (!(line.matchFirst(rgx.comment))))) {
+          /+ within section (block object): glossary +/
+          debug(glossary) {
+            writeln(__LINE__);
+            writeln(line);
+          }
+          type["glossary_section"] = State.on;
+          type["biblio_section"] = State.off;
+          type["blurb_section"] = State.off;
+          if (opt_action["backmatter"] && opt_action["section_glossary"]) {
+            indent=[
+              "hang_position" : 0,
+              "base_position" : 0,
+            ];
+            bullet = false;
+            type["para"] = State.on;
+            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_.use                   = "backmatter";
+              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_.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_.use                   = "backmatter";
+              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_.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_;
+            } else {
+              _para_match_(line, an_object, an_object_key, indent, bullet, type, line_occur);
+              comp_obj_para                       = comp_obj_para.init;
+              comp_obj_para.use                   = "backmatter";
+              comp_obj_para.is_of                 = "para";
+              comp_obj_para.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.indent_hang           = indent["hang_position"];
+              comp_obj_para.indent_base           = indent["base_position"];
+              comp_obj_para.bullet                = bullet;
+              the_glossary_section                ~= comp_obj_para;
+            }
+            type["ocn_status"] = TriState.off;
+          }
+          continue;
+        } else if (line.matchFirst(rgx.heading_blurb)
+        || (type["blurb_section"] == State.on
+        && (!(line.matchFirst(rgx.heading_biblio_glossary)))
+        && (!(line.matchFirst(rgx.heading)))
+        && (!(line.matchFirst(rgx.comment))))) {
+          /+ within section (block object): blurb +/
+          debug(blurb) {
+            writeln(__LINE__);
+            writeln(line);
+          }
+          type["glossary_section"] = State.off;
+          type["biblio_section"] = State.off;
+          type["blurb_section"] = State.on;
+          if (opt_action["backmatter"] && opt_action["section_blurb"]) {
+            indent=[
+              "hang_position" : 0,
+              "base_position" : 0,
+            ];
+            bullet = false;
+            type["para"] = State.on;
+            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_.use                   = "backmatter";
+              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_.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_.use                   = "backmatter";
+              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_.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_;
+            } else if (line.matchFirst(rgx.heading)
+            && (opt_action["backmatter"] && opt_action["section_blurb"])) {
+              comp_obj_heading_                       = comp_obj_heading_.init;
+              comp_obj_heading_.use                   = "backmatter";
+              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_.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_;
+            } else {
+              _para_match_(line, an_object, an_object_key, indent, bullet, type, line_occur);
+              comp_obj_para                       = comp_obj_para.init;
+              comp_obj_para.use                   = "backmatter";
+              comp_obj_para.is_of                 = "para";
+              comp_obj_para.is_a                  = "blurb";
+              comp_obj_para.text                  = line.to!string.strip;
+              comp_obj_para.ocn                   = 0;
+              comp_obj_para.obj_cite_number       = "";
+              comp_obj_para.indent_hang           = indent["hang_position"];
+              comp_obj_para.indent_base           = indent["base_position"];
+              comp_obj_para.bullet                = bullet;
+              the_blurb_section                   ~= comp_obj_para;
+            }
+            type["ocn_status"] = TriState.off;
+          }
+          continue;
+        } else if (type["quote"] == TriState.on) {
+          /+ within block object: quote +/
+          _quote_block_(line, an_object, type);
+          continue;
+        /+ within block object: group +/
+        } else if (type["group"] == TriState.on) {
+          /+ within block object: group +/
+          line = (line)
+            .replaceAll(rgx.para_delimiter, mkup.br_paragraph ~ "$1");
+          _group_block_(line, an_object, type);
+          continue;
+        } else if (type["block"] == TriState.on) {
+          /+ within block object: block +/
+          if (auto m = line.match(rgx.spaces_line_start)) {
+            line = (line)
+              .replaceAll(rgx.spaces_line_start, (m.captures[1]).translate([ ' ' : mkup.nbsp ]));
+          }
+          if (auto m = line.match(rgx.spaces_multiple)) {
+            line = (line)
+              .replaceAll(rgx.spaces_multiple, (m.captures[1]).translate([ ' ' : mkup.nbsp ]));
+          }
+          _block_block_(line, an_object, type);
+          continue;
+        } else if (type["poem"] == TriState.on) {
+          /+ within block object: poem +/
+          _poem_block_(line, an_object, type, cntr, obj_cite_number_poem, dochead_make_aa);
+          continue;
+        } else if (type["table"] == TriState.on) {
+          /+ within block object: table +/
+          _table_block_(line, an_object, type, dochead_make_aa);
+          continue;
+        } else {
+          /+ not within a block group +/
+          assert(
+            (type["blocks"] == TriState.off)
+            || (type["blocks"] == TriState.closing),
+            "block status: none or closed"
+          );
+          assertions_flag_types_block_status_none_or_closed(type);
+          if (line.matchFirst(rgx.block_open)) {
+            if (line.matchFirst(rgx.block_poem_open)) {
+              /+ poem to verse exceptions! +/
+              object_reset(an_object);
+              processing.remove("verse");
+              obj_cite_number_poem["start"] = obj_cite_number.to!string;
+            }
+            _start_block_(line, type, obj_cite_number_poem);
+            continue;
+          } else if (!line.empty) {
+            /+ line not empty +/
+            /+ non blocks (headings, paragraphs) & closed blocks +/
+            assert(
+              !line.empty,
+              "line tested, line not empty surely:\n  \"" ~ line ~ "\""
+            );
+            assert(
+              (type["blocks"] == TriState.off)
+              || (type["blocks"] == TriState.closing),
+              "code block status: none or closed"
+            );
+            if (type["blocks"] == TriState.closing) {
+              debug(check) {                           // block
+                writeln(__LINE__);
+                writeln(line);
+              }
+              assert(
+                line.matchFirst(rgx.book_index)
+                || line.matchFirst(rgx.book_index_open)
+                || type["book_index"] == State.on,
+                "\nblocks closed, unless followed by book index, non-matching line:\n  \""
+                ~ line ~ "\""
+              );
+            }
+            if (line.matchFirst(rgx.book_index)
+            || line.matchFirst(rgx.book_index_open)
+            || type["book_index"] == State.on )  {
+              /+ book_index +/
+              _book_index_(line, book_idx_tmp, an_object, type, opt_action);
+            } else {
+              /+ not book_index +/
+              an_object_key="body_nugget";
+              if (auto m = matchFirst(line, rgx.comment)) {
+                /+ matched comment +/
+                debug(comment) {
+                  writeln(line);
+                }
+                an_object[an_object_key] ~= line ~= "\n";
+                comp_obj_comment                   = comp_obj_comment.init;
+                comp_obj_comment.use               = "comment";
+                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;
+                _common_reset_(line_occur, an_object, type);
+                processing.remove("verse");
+                ++cntr;
+              } else if (((line_occur["para"] == State.off)
+              && (line_occur["heading"] == State.off))
+              && ((type["para"] == State.off)
+              && (type["heading"] == State.off))) {
+                /+ heading or para but neither flag nor line exists +/
+                if ((dochead_make_aa["make"]["headings"].length > 2)
+                && (type["make_headings"] == State.off)) {
+                  /+ heading found +/
+                  _heading_found_(line, dochead_make_aa["make"]["headings"], heading_match_str, heading_match_rgx, type);
+                }
+                if ((type["make_headings"] == State.on)
+                && ((line_occur["para"] == State.off)
+                && (line_occur["heading"] == State.off))
+                && ((type["para"] == State.off)
+                && (type["heading"] == State.off))) {
+                  /+ heading make set +/
+                  line = _heading_make_set_(line, line_occur, heading_match_rgx, type);
+                }
+                /+ TODO node info: all headings identified at this point,
+                   - extract node info here??
+                   - how long can it wait?
+                   - should be incorporated in composite objects
+                   - should happen before endnote links set (they need to be moved down?)
+                +/
+                if (line.matchFirst(rgx.heading)) {
+                  /+ heading match +/
+                  _heading_matched_(line, line_occur, an_object, an_object_key, lv, collapsed_lev, type, dochead_meta_aa);
+                } else if (line_occur["para"] == State.off) {
+                  /+ para match +/
+                  an_object_key="body_nugget";
+                  _para_match_(line, an_object, an_object_key, indent, bullet, type, line_occur);
+                }
+              } else if (line_occur["heading"] > State.off) {
+                /+ heading +/
+                debug(heading) {
+                  writeln(line);
+                }
+                an_object[an_object_key] ~= line ~= "\n";
+                ++line_occur["heading"];
+              } else if (line_occur["para"] > State.off) {
+                /+ paragraph +/
+                debug(para) {
+                  writeln(an_object_key, "-> ", line);
+                }
+                an_object[an_object_key] ~= " " ~ line;
+                ++line_occur["para"];
+              }
+            }
+          } else if (type["blocks"] == TriState.closing) {
+            /+ line empty, with blocks flag +/
+            _block_flag_line_empty_(
+              bookindex_extract_hash,
+              line,
+              an_object,
+              the_document_body_section,
+              bookindex_unordered_hashes,
+              obj_cite_number,
+              comp_obj_heading,
+              cntr,
+              type,
+              obj_cite_number_poem,
+              dochead_make_aa
+            );
+          } else {
+            /+ line.empty, post contents, empty variables: +/
+            assert(
+              line.empty,
+              "\nline should be empty:\n  \""
+              ~ line ~ "\""
+            );
+            assert(
+              (type["blocks"] == State.off),
+              "code block status: none"
+            );
+            if ((type["heading"] == State.on)
+            && (line_occur["heading"] > State.off)) {
+              /+ heading object (current line empty) +/
+              obj_cite_number = (an_object["lev_markup_number"].to!int == 0)
+              ? (ocn_emit(3))
+              : (obj_cite_number = ocn_emit(type["ocn_status"]));
+              an_object["is"] = "heading";
+              an_object_key="body_nugget";
+              auto substantive_object_and_anchor_tags_tuple =
+                obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, dochead_make_aa);
+              an_object["substantive"] = substantive_object_and_anchor_tags_tuple[sObj.content];
+              anchor_tags = substantive_object_and_anchor_tags_tuple[sObj.anchor_tags];
+              if (an_object["lev_markup_number"].to!int == 4) {
+                segment_anchor_tag_that_object_belongs_to = anchor_tags[0];
+                segment_anchor_tag_that_object_belongs_to_uri = anchor_tags[0] ~ ".fnSuffix";
+                anchor_tag_ = anchor_tags[0];
+              } else if (an_object["lev_markup_number"].to!int > 4) {
+                segment_anchor_tag_that_object_belongs_to = anchor_tag_;
+                segment_anchor_tag_that_object_belongs_to_uri = anchor_tag_ ~ ".fnSuffix#" ~ obj_cite_number.to!string;
+              } else if (an_object["lev_markup_number"].to!int < 4) {
+              string segn;
+                switch (an_object["lev_markup_number"].to!int) {
+                case 0:
+                  segn = "_the_title";
+                  goto default;
+                case 1:
+                  segn = "_part_" ~ cnt1.to!string;
+                  ++cnt1;
+                  goto default;
+                case 2:
+                  segn = "_part_" ~  cnt1.to!string ~ "_" ~ cnt2.to!string;
+                  ++cnt2;
+                  goto default;
+                case 3:
+                  segn =  "_part_" ~  cnt1.to!string ~ "_" ~ cnt2.to!string ~ "_" ~ cnt3.to!string;
+                  ++cnt3;
+                  goto default;
+                default:
+                  segment_anchor_tag_that_object_belongs_to = segn;
+                  segment_anchor_tag_that_object_belongs_to_uri = segn ~ ".fnSuffix";
+                  break;
+                }
+              }
+              an_object["bookindex_nugget"] =
+                ("bookindex_nugget" in an_object) ? an_object["bookindex_nugget"] : "";
+              bookindex_unordered_hashes =
+                bookindex_extract_hash.bookindex_nugget_hash(an_object["bookindex_nugget"], obj_cite_number, segment_anchor_tag_that_object_belongs_to);
+              /+ (incrementally build toc) table of contents here! +/
+              _anchor_tag=to!string(obj_cite_number);
+              the_table_of_contents_section = obj_im.table_of_contents_gather_headings(
+                an_object,
+                dochead_make_aa,
+                segment_anchor_tag_that_object_belongs_to,
+                _anchor_tag,
+                lev4_subtoc,
+                the_table_of_contents_section,
+              );
+              if (an_object["lev_markup_number"] == "4") {
+                html_segnames ~= segment_anchor_tag_that_object_belongs_to;
+                html_segnames_ptr = html_segnames_ptr_cntr;
+                html_segnames_ptr_cntr++;
+              }
+              auto comp_obj_heading =
+                node_construct.node_emitter_heading(
+                  an_object["substantive"],                     // string
+                  an_object["lev"],                             // string
+                  an_object["lev_markup_number"],               // string
+                  an_object["lev_collapsed_number"],            // string
+                  segment_anchor_tag_that_object_belongs_to,    // string
+                  obj_cite_number,                              // int
+                  cntr,                                         // int
+                  heading_ptr,                                  // int
+                  lv_ancestors_txt,                             // string[]
+                  an_object["is"],                              // string
+                  html_segnames_ptr,                            // int
+                  substantive_object_and_anchor_tags_tuple[sObj.notes_reg],
+                  substantive_object_and_anchor_tags_tuple[sObj.notes_star],
+                  substantive_object_and_anchor_tags_tuple[sObj.links],
+                );
+              ++heading_ptr;
+              debug(segments) {
+                writeln(an_object["lev_markup_number"]);
+                writeln(segment_anchor_tag_that_object_belongs_to);
+              }
+              the_document_body_section ~= comp_obj_heading;
+              debug(objectrelated1) { // check
+                writeln(line);
+              }
+              _common_reset_(line_occur, an_object, type);
+              an_object.remove("lev");
+              an_object.remove("lev_markup_number");
+              processing.remove("verse");
+              ++cntr;
+            } else if ((type["para"] == State.on)
+            && (line_occur["para"] > State.off)) {
+              /+ paragraph object (current line empty) +/
+              obj_cite_number = ocn_emit(type["ocn_status"]);
+              an_object["bookindex_nugget"] =
+                ("bookindex_nugget" in an_object) ? an_object["bookindex_nugget"] : "";
+              bookindex_unordered_hashes =
+                bookindex_extract_hash.bookindex_nugget_hash(an_object["bookindex_nugget"], obj_cite_number, segment_anchor_tag_that_object_belongs_to);
+              an_object["is"] = "para";
+              auto comp_obj_heading =
+                node_construct.node_location_emitter(
+                  content_non_header,
+                  segment_anchor_tag_that_object_belongs_to,
+                  obj_cite_number,
+                  cntr,
+                  heading_ptr-1,
+                  an_object["is"],
+                );
+              auto substantive_obj_misc_tuple =
+                obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, dochead_make_aa);
+              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.use                   = "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_number;
+              comp_obj_para.obj_cite_number       = (obj_cite_number==0) ? "" : obj_cite_number.to!string;
+              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];
+              the_document_body_section           ~= comp_obj_para;
+              _common_reset_(line_occur, an_object, type);
+              indent=[
+                "hang_position" : 0,
+                "base_position" : 0,
+              ];
+              bullet = false;
+              processing.remove("verse");
+              ++cntr;
+            } else {
+              assert(
+                line == null,
+                "line variable should be empty, should not occur"
+              );
+            }
+          } // close else for line empty
+        } // close else for not the above
+      } // 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[$-1].is_a == "verse"))
+        && (the_document_body_section.length > previous_length)) {
+          if ((the_document_body_section[$-1].is_a == "heading")
+          && (the_document_body_section[$-1].heading_lev_markup < 5)) {
+            type["biblio_section"] = State.off;
+            type["glossary_section"] = State.off;
+            type["blurb_section"] = State.off;
+          }
+          if (the_document_body_section[$-1].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].text).match(
+                  rgx.inline_notes_delimiter_al_regular_number_note
+                )) {
+                  note_section.gather_notes_for_endnote_section(
+                    the_document_body_section,
+                    segment_anchor_tag_that_object_belongs_to,
+                    to!int(i),
+                  );
+                }
+              }
+            }
+          } else {
+            /+ scan object for endnotes +/
+            previous_length = the_document_body_section.length.to!int;
+            if ((the_document_body_section[$-1].text).match(
+              rgx.inline_notes_delimiter_al_regular_number_note
+            )) {
+              previous_count=(the_document_body_section.length -1).to!int;
+              note_section.gather_notes_for_endnote_section(
+                the_document_body_section,
+                segment_anchor_tag_that_object_belongs_to,
+                to!int(the_document_body_section.length-1),
+              );
+            }
+          }
+          previous_length = the_document_body_section.length.to!int;
+        }
+      }
+    } /+ ← closed: loop markup document/text line by line +/
+    /+ ↓ post loop markup document/text +/
+    auto en_tuple =
+      note_section.endnote_objects(obj_cite_number, opt_action);
+    static assert(!isTypeTuple!(en_tuple));
+    auto the_endnotes_section = en_tuple[0];
+    obj_cite_number = en_tuple[1];
+    debug(endnotes) {
+      writefln(
+        "%s %s",
+        __LINE__,
+        the_endnotes_section.length
+      );
+      foreach (o; the_endnotes_section) {
+        writeln(o);
+      }
+    }
+    if (an_object["glossary_nugget"].length == 0) {
+      comp_obj_heading_                       = comp_obj_heading_.init;
+      comp_obj_heading_.use                   = "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_.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_;
+    } else {
+      writeln("gloss");
+    }
+    debug(glossary) {
+      foreach (gloss; the_glossary_section) {
+        writeln(gloss.text);
+      }
+    }
+    auto biblio_unsorted_incomplete = biblio_arr_json.dup;
+    auto biblio = Bibliography();
+    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_.use                   = "backmatter";
+      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_.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_.use                   = "backmatter";
+      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_.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_;
+    } else {
+      comp_obj_heading_                       = comp_obj_heading_.init;
+      comp_obj_heading_.use                   = "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_.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_;
+    }
+    string out_;
+    foreach (entry; biblio_ordered) {
+      out_ = format(
+        "%s \"%s\"%s%s%s%s%s%s%s%s%s.",
+        ((entry["author"].str.empty) ? entry["editor"].str : entry["author"].str),
+        entry["fulltitle"].str,
+        ((entry["journal"].str.empty) ? "" : ", /{" ~ entry["journal"].str ~ "}/"),
+        ((entry["volume"].str.empty) ? "" : ", " ~ entry["volume"].str),
+        ((entry["in"].str.empty) ? "" : ", " ~ entry["in"].str),
+        ((!(entry["author"].str.empty) && (!(entry["editor"].str.empty))) ? entry["editor"].str : ""),
+        ", " ~ entry["year"].str,
+        ((entry["pages"].str.empty) ? "" : ", " ~ entry["pages"].str),
+        ((entry["publisher"].str.empty) ? "" : ", " ~ entry["publisher"].str),
+        ((entry["place"].str.empty) ? "" : ", " ~ entry["place"].str),
+        ((entry["url"].str.empty) ? "" : ", [" ~ entry["url"].str ~ "]"),
+      );
+      comp_obj_para                       = comp_obj_para.init;
+      comp_obj_para.use                   = "backmatter";
+      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.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;
+    }
+    debug(bibliosection) {
+      foreach (o; the_bibliography_section) {
+        writeln(o.text);
+      }
+    }
+    auto bi = BookIndexReportSection();
+    auto bi_tuple =
+      bi.bookindex_build_abstraction_section(
+        bookindex_unordered_hashes,
+        obj_cite_number,
+        opt_action,
+      );
+    destroy(bookindex_unordered_hashes);
+    static assert(!isTypeTuple!(bi_tuple));
+    auto the_bookindex_section = bi_tuple[0];
+    obj_cite_number = bi_tuple[1];
+    debug(bookindex) {
+      foreach (bi_entry; the_bookindex_section["seg"]) {
+        writeln(bi_entry);
+      }
+    }
+    if (an_object["blurb_nugget"].length == 0) {
+      comp_obj_heading_                       = comp_obj_heading_.init;
+      comp_obj_heading_.use                   = "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_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_;
+    }
+    debug(blurb) {
+      foreach (blurb; the_blurb_section) {
+        writeln(blurb.text);
+      }
+    }
+    indent=[
+      "hang_position" : 1,
+      "base_position" : 1,
+    ];
+    comp_obj_toc                       = comp_obj_toc.init;
+    comp_obj_toc.use                   = "frontmatter";
+    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.indent_hang           = indent["hang_position"];
+    comp_obj_toc.indent_base           = indent["base_position"];
+    comp_obj_toc.bullet                = false;
+    if (the_endnotes_section.length > 1) {
+      toc_txt_ = format(
+        "{ %s }%s%s%s",
+        "Endnotes",
+        mkup.mark_internal_site_lnk,
+        "endnotes",               // segment_anchor_tag_that_object_belongs_to
+        ".fnSuffix",
+      );
+      toc_txt_= munge.url_links(toc_txt_);
+      comp_obj_toc.text                       = toc_txt_.to!string.strip;
+      comp_obj_toc.inline_links               = true;
+      the_table_of_contents_section["seg"]    ~= comp_obj_toc;
+    }
+    if (the_glossary_section.length > 1) {
+      toc_txt_ = format(
+        "{ %s }%s%s%s",
+        "Glossary",
+        mkup.mark_internal_site_lnk,
+        "glossary",               // segment_anchor_tag_that_object_belongs_to
+        ".fnSuffix",
+      );
+      toc_txt_= munge.url_links(toc_txt_);
+      comp_obj_toc.text                       = toc_txt_.to!string.strip;
+      comp_obj_toc.inline_links               = true;
+      the_table_of_contents_section["seg"]    ~= comp_obj_toc;
+      toc_txt_ = format(
+        "{ %s }#%s",
+        "Glossary",
+        "glossary",               // _anchor_tag
+      );
+      toc_txt_= munge.url_links(toc_txt_);
+      comp_obj_toc.text                       = toc_txt_.to!string.strip;
+      comp_obj_toc.inline_links               = true;
+      the_table_of_contents_section["scroll"] ~= comp_obj_toc;
+    }
+    if (the_bibliography_section.length > 1){
+      toc_txt_ = format(
+        "{ %s }%s%s%s",
+        "Bibliography",
+        mkup.mark_internal_site_lnk,
+        "bibliography",           // segment_anchor_tag_that_object_belongs_to
+        ".fnSuffix",
+      );
+      toc_txt_= munge.url_links(toc_txt_);
+      comp_obj_toc.text                       = toc_txt_.to!string.strip;
+      comp_obj_toc.inline_links               = true;
+      the_table_of_contents_section["seg"]    ~= comp_obj_toc;
+    
+      toc_txt_ = format(
+        "{ %s }#%s",
+        "Bibliography",
+        "bibliography",           // _anchor_tag
+      );
+      toc_txt_= munge.url_links(toc_txt_);
+      comp_obj_toc.text                       = toc_txt_.to!string.strip;
+      comp_obj_toc.inline_links               = true;
+      the_table_of_contents_section["scroll"] ~= comp_obj_toc;
+    }
+    if (the_bookindex_section["seg"].length > 1) {
+      toc_txt_ = format(
+        "{ %s }%s%s%s",
+        "Book Index",
+        mkup.mark_internal_site_lnk,
+        "bookindex",              // segment_anchor_tag_that_object_belongs_to
+        ".fnSuffix",
+      );
+      toc_txt_= munge.url_links(toc_txt_);
+      comp_obj_toc.text                       = toc_txt_.to!string.strip;
+      comp_obj_toc.inline_links               = true;
+      the_table_of_contents_section["seg"]    ~= comp_obj_toc;
+    }
+    if (the_bookindex_section["scroll"].length > 1) {
+      toc_txt_ = format(
+        "{ %s }#%s",
+        "Book Index",
+        "bookindex",              // _anchor_tag
+      );
+      toc_txt_= munge.url_links(toc_txt_);
+      comp_obj_toc.text                       = toc_txt_.to!string.strip;
+      comp_obj_toc.inline_links               = true;
+      the_table_of_contents_section["scroll"] ~= comp_obj_toc;
+    }
+    if (the_blurb_section.length > 1) {
+      toc_txt_ = format(
+        "{ %s }%s%s%s",
+        "Blurb",
+        mkup.mark_internal_site_lnk,
+        "blurb",                  // segment_anchor_tag_that_object_belongs_to
+        ".fnSuffix",
+      );
+      toc_txt_= munge.url_links(toc_txt_);
+      comp_obj_toc.text                       = toc_txt_.to!string.strip;
+      comp_obj_toc.inline_links               = true;
+      the_table_of_contents_section["seg"]    ~= comp_obj_toc;
+      toc_txt_ = format(
+        "{ %s }#%s",
+        "Blurb",
+        "blurb",                  // _anchor_tag
+      );
+      toc_txt_= munge.url_links(toc_txt_);
+      comp_obj_toc.inline_links               = true;
+      comp_obj_toc.text                       = toc_txt_.to!string.strip;
+      the_table_of_contents_section["scroll"] ~= comp_obj_toc;
+    }
+    debug(toc) {
+      writefln(
+        "%s %s",
+        __LINE__,
+        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);
+      }
+    }
+    debug(tocscroll) {
+      writefln(
+        "%s %s",
+        __LINE__,
+        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);
+      }
+    }
+    the_document_head_section ~= the_document_body_section[0];
+    the_document_body_section=the_document_body_section[1..$];
+    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;
+          break;
+        }
+      }
+      html_segnames_ptr_cntr++;
+    }
+    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;
+          break;
+        }
+      }
+      html_segnames_ptr_cntr++;
+    }
+    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;
+          break;
+        }
+      }
+      html_segnames_ptr_cntr++;
+    }
+    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;
+          break;
+        }
+      }
+      foreach (ref section; the_bookindex_section["seg"]) {
+        if (section.heading_lev_markup == 4) {
+          section.ptr_html_segnames = html_segnames_ptr;
+          break;
+        }
+      }
+      html_segnames_ptr_cntr++;
+    }
+    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;
+          break;
+        }
+      }
+      html_segnames_ptr_cntr++;
+    }
+    string[] _images;
+    auto extract_images(S)(S content_block) {
+      string[] images_;
+      if (auto m = content_block.matchAll(rgx.image)) {
+        images_ ~= m.captures[1];
+      }
+      return images_;
+    }
+    string[] segnames_0_4;
+    foreach (ref obj; the_document_head_section) {
+      if (obj.is_a == "heading") {
+        debug(dom) {
+          writeln(obj.text);
+        }
+        if (obj.heading_lev_markup <= 4) {
+          segnames_0_4 ~= obj.segment_anchor_tag;
+        }
+        /+ dom structure (marked up & collapsed) +/
+        if ((opt_action["html"])
+        || (opt_action["html-scroll"])
+        || (opt_action["html-seg"])
+        || (opt_action["epub"])
+        || (opt_action["sqlite"])
+        || (opt_action["postgresql"])) {
+          obj = obj_dom_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_heading_ancestors(obj, lv_ancestors_txt);
+      }
+    }
+    if (the_table_of_contents_section["scroll"].length > 1) {
+      /+ scroll +/
+      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]);
+            }
+          }
+          /+ dom structure (marked up & collapsed) +/
+          if ((opt_action["html"])
+          || (opt_action["html-scroll"])
+          || (opt_action["html-seg"])
+          || (opt_action["epub"])
+          || (opt_action["sqlite"])
+          || (opt_action["postgresql"])) {
+            obj = obj_dom_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_heading_ancestors(obj, lv_ancestors_txt);
+        }
+      }
+      /+ seg +/
+      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") {
+          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]);
+            }
+          }
+          if ((opt_action["html"])
+          || (opt_action["html-scroll"])
+          || (opt_action["html-seg"])
+          || (opt_action["epub"])) {
+            obj = obj_dom_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_heading_ancestors(obj, lv_ancestors_txt);
+        }
+      }
+    }
+    /+ 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") {
+          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];
+              }
+              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames]);
+            }
+          }
+          /+ dom structure (marked up & collapsed) +/
+          if ((opt_action["html"])
+          || (opt_action["html-scroll"])
+          || (opt_action["html-seg"])
+          || (opt_action["epub"])
+          || (opt_action["sqlite"])
+          || (opt_action["postgresql"])) {
+            obj = obj_dom_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_heading_ancestors(obj, lv_ancestors_txt);
+        } else if (obj.is_a == "para") {
+           _images ~= extract_images(obj.text);
+        }
+      }
+    }
+    auto images=uniq(_images.sort());
+    /+ optional only one 1~ level +/
+    if (the_endnotes_section.length > 1) {
+      dom_markedup_buffer = dom_markedup.dup;
+      dom_collapsed_buffer = dom_collapsed.dup;
+      dom_markedup = dom_markedup_buffer.dup;
+      dom_collapsed = dom_collapsed_buffer.dup;
+      foreach (ref obj; the_endnotes_section) {
+        if (obj.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_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];
+              }
+              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames]);
+            }
+          }
+          /+ dom structure (marked up & collapsed) +/
+          if ((opt_action["html"])
+          || (opt_action["html-scroll"])
+          || (opt_action["html-seg"])
+          || (opt_action["epub"])
+          || (opt_action["sqlite"])
+          || (opt_action["postgresql"])) {
+            obj = obj_dom_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_heading_ancestors(obj, lv_ancestors_txt);
+        }
+      }
+    }
+    /+ optional only one 1~ level +/
+    if (the_glossary_section.length > 1) {
+      foreach (ref obj; the_glossary_section) {
+        if (obj.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_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];
+              }
+              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames]);
+            }
+          }
+          /+ dom structure (marked up & collapsed) +/
+          if ((opt_action["html"])
+          || (opt_action["html-scroll"])
+          || (opt_action["html-seg"])
+          || (opt_action["epub"])
+          || (opt_action["sqlite"])
+          || (opt_action["postgresql"])) {
+            obj = obj_dom_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_heading_ancestors(obj, lv_ancestors_txt);
+        }
+      }
+    }
+    /+ optional only one 1~ level +/
+    if (the_bibliography_section.length > 1) {
+      foreach (ref obj; the_bibliography_section) {
+        if (obj.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_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];
+              }
+              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames]);
+            }
+          }
+          /+ dom structure (marked up & collapsed) +/
+          if ((opt_action["html"])
+          || (opt_action["html-scroll"])
+          || (opt_action["html-seg"])
+          || (opt_action["epub"])
+          || (opt_action["sqlite"])
+          || (opt_action["postgresql"])) {
+            obj = obj_dom_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_heading_ancestors(obj, lv_ancestors_txt);
+        }
+      }
+    }
+    /+ optional only one 1~ level +/
+    if (the_bookindex_section["scroll"].length > 1) {
+      /+ scroll +/
+      dom_markedup_buffer = dom_markedup.dup;
+      dom_collapsed_buffer = dom_collapsed.dup;
+      foreach (ref obj; the_bookindex_section["scroll"]) {
+        if (obj.is_a == "heading") {
+          debug(dom) {
+          }
+          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];
+              }
+              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames]);
+            }
+          }
+          /+ dom structure (marked up & collapsed) +/
+          if ((opt_action["html"])
+          || (opt_action["html-scroll"])
+          || (opt_action["html-seg"])
+          || (opt_action["epub"])
+          || (opt_action["sqlite"])
+          || (opt_action["postgresql"])) {
+            obj = obj_dom_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_heading_ancestors(obj, lv_ancestors_txt);
+        }
+      }
+      /+ 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") {
+          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_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];
+              }
+              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames]);
+            }
+          }
+          /+ dom structure (marked up & collapsed) +/
+          if ((opt_action["html"])
+          || (opt_action["html-scroll"])
+          || (opt_action["html-seg"])
+          || (opt_action["epub"])
+          || (opt_action["sqlite"])
+          || (opt_action["postgresql"])) {
+            obj = obj_dom_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_heading_ancestors(obj, lv_ancestors_txt);
+        }
+      }
+    }
+    /+ optional only one 1~ level +/
+    if (the_blurb_section.length > 1) {
+      foreach (ref obj; the_blurb_section) {
+        if (obj.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_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];
+              }
+              assert(obj.segment_anchor_tag == html_segnames[obj.ptr_html_segnames]);
+            }
+          }
+          /+ dom structure (marked up & collapsed) +/
+          if ((opt_action["html"])
+          || (opt_action["html-scroll"])
+          || (opt_action["html-seg"])
+          || (opt_action["epub"])
+          || (opt_action["sqlite"])
+          || (opt_action["postgresql"])) {
+            obj = obj_dom_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_heading_ancestors(obj, lv_ancestors_txt);
+        }
+      }
+    }
+      /+ 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;
+      +/
+    comp_obj_heading_                       = comp_obj_heading_.init;
+    comp_obj_heading_.use                   = "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_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;
+    obj_dom_set_markup_tags(comp_obj_heading_, dom_markedup, 0);
+    obj_dom_set_collapsed_tags(comp_obj_heading_, dom_collapsed, 0);
+    obj_heading_ancestors(comp_obj_heading_, lv_ancestors_txt);
+    comp_obj_heading_ = obj_dom_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_;
+    auto document_the = [
+      "head":             the_document_head_section,
+      "toc_seg":          the_table_of_contents_section["seg"],
+      "toc_scroll":       the_table_of_contents_section["scroll"],
+      /+ substantive/body: +/
+      "body":             the_document_body_section,
+      /+ backmatter: +/
+      "endnotes":         the_endnotes_section,
+      "glossary":         the_glossary_section,
+      "bibliography":     the_bibliography_section,
+      "bookindex_scroll": the_bookindex_section["scroll"],
+      "bookindex_seg":    the_bookindex_section["seg"],
+      "blurb":            the_blurb_section,
+      /+ dom tail only +/
+      "tail":             the_dom_tail_section,
+    ];
+    string[][string] document_section_keys_sequenced = [
+      "seg":    ["head", "toc_seg", "body",],
+      "scroll": ["head", "toc_scroll", "body",],
+      "sql":    ["head", "body",]
+    ];
+    if (document_the["endnotes"].length > 1) {
+      document_section_keys_sequenced["seg"]    ~= "endnotes";
+      document_section_keys_sequenced["scroll"] ~= "endnotes";
+    }
+    if (document_the["glossary"].length > 1) {
+      document_section_keys_sequenced["seg"]    ~= "glossary";
+      document_section_keys_sequenced["scroll"] ~= "glossary";
+      document_section_keys_sequenced["sql"]    ~= "glossary";
+    }
+    if (document_the["bibliography"].length > 1) {
+      document_section_keys_sequenced["seg"]    ~= "bibliography";
+      document_section_keys_sequenced["scroll"] ~= "bibliography";
+      document_section_keys_sequenced["sql"]    ~= "bibliography";
+    }
+    if (document_the["bookindex_seg"].length > 1) {
+      document_section_keys_sequenced["seg"]    ~= "bookindex_seg";
+      document_section_keys_sequenced["sql"]    ~= "bookindex_seg";
+    }
+    if (document_the["bookindex_scroll"].length > 1) {
+      document_section_keys_sequenced["scroll"] ~= "bookindex_scroll";
+    }
+    if (document_the["blurb"].length > 1) {
+      document_section_keys_sequenced["seg"]    ~= "blurb";
+      document_section_keys_sequenced["scroll"] ~= "blurb";
+      document_section_keys_sequenced["sql"]    ~= "blurb";
+    }
+    if ((opt_action["html"])
+    || (opt_action["html-scroll"])
+    || (opt_action["html-seg"])
+    || (opt_action["epub"])) {
+      document_section_keys_sequenced["seg"]    ~= "tail";
+      document_section_keys_sequenced["scroll"] ~= "tail";
+    }
+    auto segnames = html_segnames.dup;
+    destroy(the_document_head_section);
+    destroy(the_table_of_contents_section);
+    destroy(the_document_body_section);
+    destroy(the_endnotes_section);
+    destroy(the_glossary_section);
+    destroy(the_bibliography_section);
+    destroy(the_bookindex_section);
+    destroy(the_blurb_section);
+    destroy(html_segnames);
+    destroy(bookindex_unordered_hashes);
+    destroy(an_object);
+    biblio_arr_json = [];
+    obj_cite_number=0;
+    obj_cite_number_=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,
+      docSectKeysSeq!()(document_section_keys_sequenced),
+      segnames,
+      segnames_0_4,
+      images,
+    );
+    return t;
+    /+ post loop markup document/text ↑ +/
+  } /+ ← closed: abstract doc source +/
+  /+ ↓ abstraction functions +/
+  auto object_reset(O)(ref O an_object) {
+    debug(asserts) {
+      static assert(is(typeof(an_object) == string[string]));
+    }
+    an_object.remove("body_nugget");
+    an_object.remove("substantive");
+    an_object.remove("is");
+    an_object.remove("attrib");
+    an_object.remove("bookindex_nugget");
+  }
+  auto _common_reset_(L,O,T)(
+    return ref L line_occur,
+    return ref O an_object,
+    return ref T type
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line_occur) == int[string]));
+      static assert(is(typeof(an_object)  == string[string]));
+      static assert(is(typeof(type)       == int[string]));
+    }
+    line_occur["heading"] = State.off;
+    line_occur["para"]    = State.off;
+    type["heading"]       = State.off;
+    type["para"]          = State.off;
+    object_reset(an_object);
+  }
+  void _check_ocn_status_(L,T)(
+    L            line,
+    return ref T type
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line) == char[]));
+      static assert(is(typeof(type) == int[string]));
+    }
+    auto rgx = Rgx();
+    if ((!line.empty) && (type["ocn_status_multi_obj"] == TriState.off)) {
+      /+ not multi-line object, check whether obj_cite_number is on or turned off +/
+      if (line.matchFirst(rgx.obj_cite_number_block_marks)) {
+        /+ switch off obj_cite_number +/
+        if (line.matchFirst(rgx.obj_cite_number_off_block)) {
+          type["ocn_status_multi_obj"] = TriState.on;
+          debug(ocnoff) {
+            writeln(line);
+          }
+        }
+        if (line.matchFirst(rgx.obj_cite_number_off_block_dh)) {
+          type["ocn_status_multi_obj"] = TriState.closing;
+          debug(ocnoff) {
+            writeln(line);
+          }
+        }
+      } else {
+        if (type["ocn_status_multi_obj"] == TriState.off) {
+          if (line.matchFirst(rgx.obj_cite_number_off)) {
+            type["ocn_status"] = TriState.on;
+          } else if (line.matchFirst(rgx.obj_cite_number_off_dh)) {
+            type["ocn_status"] = TriState.closing;
+          } else {
+            type["ocn_status"] = TriState.off;
+          }
+        } else {
+          type["ocn_status"] =
+            type["ocn_status_multi_obj"];
+        }
+      }
+    } else if ((!line.empty) && (type["ocn_status_multi_obj"] > TriState.off)) {
+      if (line.matchFirst(rgx.obj_cite_number_off_block_close)) {
+        type["ocn_status_multi_obj"] = TriState.off;
+        type["ocn_status"] = TriState.off;
+        debug(ocnoff) {
+          writeln(line);
+        }
+      }
+    }
+  }
+  void _start_block_(L,T,N)(
+    L            line,
+    return ref T type,
+    N            obj_cite_number_poem
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line)                 == char[]));
+      static assert(is(typeof(type)                 == int[string]));
+      static assert(is(typeof(obj_cite_number_poem) == string[string]));
+    }
+    auto rgx = Rgx();
+    string code_block_syntax = "";
+    bool code_block_numbered = false;
+    if (auto m = line.matchFirst(rgx.block_curly_code_open)) {
+      /+ curly code open +/
+      code_block_syntax = (m.captures[1]) ? m.captures[1].to!string : "";
+      code_block_numbered = (m.captures[2] == "#") ? true : false;
+      debug(code) {                              // code (curly) open
+        writefln(
+          "* [code curly] %s",
+          line
+        );
+      }
+      type["blocks"] = TriState.on;
+      type["code"] = TriState.on;
+      type["curly_code"] = TriState.on;
+    } else if (line.matchFirst(rgx.block_curly_poem_open)) {
+      /+ curly poem open +/
+      debug(poem) {                              // poem (curly) open
+        writefln(
+          "* [poem curly] %s",
+          line
+        );
+      }
+      obj_cite_number_poem["start"] =
+        obj_cite_number.to!string;
+      type["blocks"] = TriState.on;
+      type["verse_new"] = State.on;
+      type["poem"] = TriState.on;
+      type["curly_poem"] = TriState.on;
+    } else if (line.matchFirst(rgx.block_curly_group_open)) {
+      /+ curly group open +/
+      debug(group) {                             // group (curly) open
+        writefln(
+          "* [group curly] %s",
+          line
+        );
+      }
+      type["blocks"] = TriState.on;
+      type["group"] = TriState.on;
+      type["curly_group"] = TriState.on;
+    } else if (line.matchFirst(rgx.block_curly_block_open)) {
+      /+ curly block open +/
+      debug(block) {                             // block (curly) open
+        writefln(
+          "* [block curly] %s",
+          line
+        );
+      }
+      type["blocks"] = TriState.on;
+      type["block"] = TriState.on;
+      type["curly_block"] = TriState.on;
+    } else if (line.matchFirst(rgx.block_curly_quote_open)) {
+      /+ curly quote open +/
+      debug(quote) {                             // quote (curly) open
+        writefln(
+          "* [quote curly] %s",
+          line
+        );
+      }
+      type["blocks"] = TriState.on;
+      type["quote"] = TriState.on;
+      type["curly_quote"] = TriState.on;
+    } else if (auto m = line.matchFirst(rgx.block_curly_table_open)) {
+      /+ curly table open +/
+      debug(table) {                             // table (curly) open
+        writefln(
+          "* [table curly] %s",
+          line
+        );
+      }
+      an_object["table_head"]            = m.captures[1].to!string;
+      an_object["block_type"]            = "curly";
+      type["blocks"]                     = TriState.on;
+      type["table"]                      = TriState.on;
+      type["curly_table"]                = TriState.on;
+    } else if (auto m = line.matchFirst(rgx.block_curly_table_special_markup)) {
+      /+ table: special table block markup syntax! +/
+      an_object["table_head"]            = m.captures[1].to!string;
+      an_object["block_type"]            = "special";
+      type["blocks"]                     = TriState.on;
+      type["table"]                      = TriState.on;
+      type["curly_table_special_markup"] = TriState.on;
+    } else if (auto m = line.matchFirst(rgx.block_tic_code_open)) {
+      /+ tic code open +/
+      code_block_syntax = (m.captures[1]) ? m.captures[1].to!string : "";
+      code_block_numbered = (m.captures[2] == "#") ? true : false;
+      debug(code) {                              // code (tic) open
+        writefln(
+          "* [code tic] %s",
+          line
+        );
+      }
+      type["blocks"] = TriState.on;
+      type["code"] = TriState.on;
+      type["tic_code"] = TriState.on;
+    } else if (line.matchFirst(rgx.block_tic_poem_open)) {
+      /+ tic poem open +/
+      debug(poem) {                              // poem (tic) open
+        writefln(
+          "* [poem tic] %s",
+          line
+        );
+      }
+      obj_cite_number_poem["start"] = obj_cite_number.to!string;
+      type["blocks"] = TriState.on;
+      type["verse_new"] = State.on;
+      type["poem"] = TriState.on;
+      type["tic_poem"] = TriState.on;
+    } else if (line.matchFirst(rgx.block_tic_group_open)) {
+      /+ tic group open +/
+      debug(group) {                             // group (tic) open
+        writefln(
+          "* [group tic] %s",
+          line
+        );
+      }
+      type["blocks"] = TriState.on;
+      type["group"] = TriState.on;
+      type["tic_group"] = TriState.on;
+    } else if (line.matchFirst(rgx.block_tic_block_open)) {
+      /+ tic block open +/
+      debug(block) {                             // block (tic) open
+        writefln(
+          "* [block tic] %s",
+          line
+        );
+      }
+      type["blocks"] = TriState.on;
+      type["block"] = TriState.on;
+      type["tic_block"] = TriState.on;
+    } else if (line.matchFirst(rgx.block_tic_quote_open)) {
+      /+ tic quote open +/
+      debug(quote) {                             // quote (tic) open
+        writefln(
+          "* [quote tic] %s",
+          line
+        );
+      }
+      type["blocks"] = TriState.on;
+      type["quote"] = TriState.on;
+      type["tic_quote"] = TriState.on;
+    } else if (auto m = line.matchFirst(rgx.block_tic_table_open)) {
+      /+ tic table open +/
+      debug(table) {                             // table (tic) open
+        writefln(
+          "* [table tic] %s",
+          line
+        );
+      }
+      an_object["table_head"]            = m.captures[1].to!string;
+      an_object["block_type"]            = "tic";
+      type["blocks"]                     = TriState.on;
+      type["table"]                      = TriState.on;
+      type["tic_table"]                  = TriState.on;
+    }
+  }
+  void _quote_block_(L,O,T)(
+    return ref L line,
+    return ref O an_object,
+    return ref T type
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line)      == char[]));
+      static assert(is(typeof(an_object) == string[string]));
+      static assert(is(typeof(type)      == int[string]));
+    }
+    auto rgx = Rgx();
+    if (type["curly_quote"] == TriState.on) {
+      if (line.matchFirst(rgx.block_curly_quote_close)) {
+        debug(quote) {                              // quote (curly) close
+          writeln(line);
+        }
+        an_object[an_object_key] = an_object[an_object_key].stripRight;
+        type["blocks"]      = TriState.closing;
+        type["quote"]       = TriState.closing;
+        type["curly_quote"] = TriState.off;
+      } else {
+        debug(quote) {
+          writeln(line);
+        }
+        an_object[an_object_key] ~= line ~= "\n";   // build quote array (or string)
+      }
+    } else if (type["tic_quote"] == TriState.on) {
+      if (line.matchFirst(rgx.block_tic_close)) {
+        debug(quote) {                              // quote (tic) close
+          writeln(line);
+        }
+        an_object[an_object_key] = an_object[an_object_key].stripRight;
+        type["blocks"]    = TriState.closing;
+        type["quote"]     = TriState.closing;
+        type["tic_quote"] = TriState.off;
+      } else {
+        debug(quote) {
+          writeln(line);
+        }
+        an_object[an_object_key] ~= line ~= "\n";   // build quote array (or string)
+      }
+    }
+  }
+  void _group_block_(L,O,T)(
+    return ref L line,
+    return ref O an_object,
+    return ref T type
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line)      == char[]));
+      static assert(is(typeof(an_object) == string[string]));
+      static assert(is(typeof(type)      == int[string]));
+    }
+    auto rgx = Rgx();
+    if (type["curly_group"] == State.on) {
+      if (line.matchFirst(rgx.block_curly_group_close)) {
+        debug(group) {
+          writeln(line);
+        }
+        an_object[an_object_key] = an_object[an_object_key].stripRight;
+        type["blocks"]      = TriState.closing;
+        type["group"]       = TriState.closing;
+        type["curly_group"] = TriState.off;
+      } else {
+        debug(group) {
+          writeln(line);
+        }
+        an_object[an_object_key] ~= line ~= "\n";   // build group array (or string)
+      }
+    } else if (type["tic_group"] == TriState.on) {
+      if (line.matchFirst(rgx.block_tic_close)) {
+        debug(group) {
+          writeln(line);
+        }
+        an_object[an_object_key] = an_object[an_object_key].stripRight;
+        type["blocks"]    = TriState.closing;
+        type["group"]     = TriState.closing;
+        type["tic_group"] = TriState.off;
+      } else {
+        debug(group) {                              // group
+          writeln(line);
+        }
+        an_object[an_object_key] ~= line ~= "\n";   // build group array (or string)
+      }
+    }
+  }
+  void _block_block_(L,O,T)(
+    return ref L line,
+    return ref O an_object,
+    return ref T type
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line)      == char[]));
+      static assert(is(typeof(an_object) == string[string]));
+      static assert(is(typeof(type)      == int[string]));
+    }
+    auto rgx = Rgx();
+    if (type["curly_block"] == TriState.on) {
+      if (line.matchFirst(rgx.block_curly_block_close)) {
+        debug(block) {                             // block (curly) close
+          writeln(line);
+        }
+        an_object[an_object_key] = an_object[an_object_key].stripRight;
+        type["blocks"]      = TriState.closing;
+        type["block"]       = TriState.closing;
+        type["curly_block"] = TriState.off;
+      } else {
+        debug(block) {
+          writeln(line);
+        }
+        an_object[an_object_key] ~= line ~= "\n";   // build block array (or string)
+      }
+    } else if (type["tic_block"] == TriState.on) {
+      if (line.matchFirst(rgx.block_tic_close)) {
+        debug(block) {
+          writeln(line);
+        }
+        an_object[an_object_key] = an_object[an_object_key].stripRight;
+        type["blocks"]    = TriState.closing;
+        type["block"]     = TriState.closing;
+        type["tic_block"] = TriState.off;
+      } else {
+        debug(block) {
+          writeln(line);
+        }
+        an_object[an_object_key] ~= line ~= "\n";   // build block array (or string)
+      }
+    }
+  }
+  void _poem_block_(L,O,T,C,N,Ma)(
+    L     line,
+    return ref O an_object,
+    return ref T type,
+    return ref C cntr,
+    N            obj_cite_number_poem,
+    Ma           dochead_make_aa,
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line)                 == char[]));
+      static assert(is(typeof(an_object)            == string[string]));
+      static assert(is(typeof(type)                 == int[string]));
+      static assert(is(typeof(cntr)                 == int));
+      static assert(is(typeof(obj_cite_number_poem) == string[string]));
+      static assert(is(typeof(dochead_make_aa)      == string[string][string]));
+    }
+    auto rgx = Rgx();
+    if (type["curly_poem"] == TriState.on) {
+      if (line.matchFirst(rgx.block_curly_poem_close)) {
+        if (an_object_key in an_object
+        || processing.length > 0) {
+          an_object[an_object_key]                    = "";
+          debug(poem) {                               // poem (curly) close
+            writefln(
+              "* [poem curly] %s",
+              line
+            );
+          }
+          if (processing.length > 0) {
+            an_object[an_object_key] = processing["verse"];
+          }
+          debug(poem) {                               // poem (curly) close
+            writeln(__LINE__);
+            writefln(
+              "* %s %s",
+              obj_cite_number,
+              line
+            );
+          }
+          if (an_object.length > 0) {
+            debug(poem) {                             // poem (curly) close
+              writeln(
+                obj_cite_number,
+                an_object[an_object_key]
+              );
+            }
+            an_object["is"]                           = "verse";
+            auto substantive_obj_misc_tuple =
+              obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, dochead_make_aa);
+            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.use                        = "body";
+            comp_obj_block.is_of                      = "block";
+            comp_obj_block.is_a                       = "verse";
+            comp_obj_block.ocn                        = obj_cite_number;
+            comp_obj_block.obj_cite_number            = (obj_cite_number==0) ? "" : obj_cite_number.to!string;
+            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];
+            the_document_body_section                 ~= comp_obj_block;
+          }
+          object_reset(an_object);
+          processing.remove("verse");
+          ++cntr;
+        }
+        obj_cite_number_poem["end"] =
+          obj_cite_number.to!string;
+        type["blocks"] = TriState.closing;
+        type["poem"] = TriState.closing;
+        type["curly_poem"] = TriState.off;
+      } else {
+        processing["verse"] ~= line ~= "\n";
+        if (type["verse_new"] == State.on) {
+          obj_cite_number =
+            ocn_emit(type["ocn_status"]);
+          type["verse_new"] = State.off;
+        } else if (line.matchFirst(rgx.newline_eol_delimiter_only)) {
+          processing["verse"] = processing["verse"].stripRight;
+          verse_line = TriState.off;
+          type["verse_new"] = State.on;
+        }
+        if (type["verse_new"] == State.on) {
+          verse_line=1;
+          an_object[an_object_key] = processing["verse"];
+          debug(poem) {                          // poem verse
+            writefln(
+              "* %s curly\n%s",
+              obj_cite_number,
+              an_object[an_object_key]
+            );
+          }
+          processing.remove("verse");
+          an_object["is"]                           = "verse";
+          auto comp_obj_location = node_construct.node_location_emitter(
+            content_non_header,
+            segment_anchor_tag_that_object_belongs_to,
+            obj_cite_number,
+            cntr,
+            heading_ptr-1,
+            an_object["is"]
+          );
+          auto substantive_obj_misc_tuple =
+            obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, dochead_make_aa);
+          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.use                        = "body";
+          comp_obj_block.is_of                      = "block";
+          comp_obj_block.is_a                       = "verse";
+          comp_obj_block.ocn                        = obj_cite_number;
+          comp_obj_block.obj_cite_number            = (obj_cite_number==0) ? "" : obj_cite_number.to!string;
+          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];
+          the_document_body_section                 ~= comp_obj_block;
+          object_reset(an_object);
+          processing.remove("verse");
+          ++cntr;
+        }
+      }
+    } else if (type["tic_poem"] == TriState.on) {
+      if (auto m = line.matchFirst(rgx.block_tic_close)) { // tic_poem_close
+        an_object[an_object_key]="verse";
+        debug(poem) {                                       // poem (curly) close
+          writefln(
+            "* [poem tic] %s",
+            line
+          );
+        }
+        if (processing.length > 0) {
+          an_object[an_object_key] = processing["verse"];
+        }
+        if (an_object.length > 0) {
+          debug(poem) {                                     // poem (tic) close
+            writeln(__LINE__);
+            writeln(obj_cite_number, line);
+          }
+          processing.remove("verse");
+          an_object["is"]                           = "verse";
+          auto substantive_obj_misc_tuple =
+            obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, dochead_make_aa);
+          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.use                        = "body";
+          comp_obj_block.is_of                      = "block";
+          comp_obj_block.is_a                       = "verse";
+          comp_obj_block.ocn                        = obj_cite_number;
+          comp_obj_block.obj_cite_number            = (obj_cite_number==0) ? "" : obj_cite_number.to!string;
+          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];
+          the_document_body_section                 ~= comp_obj_block;
+          obj_cite_number_poem["end"]               = obj_cite_number.to!string;
+          object_reset(an_object);
+          processing.remove("verse");
+          ++cntr;
+        }
+        type["blocks"] = TriState.closing;
+        type["poem"] = TriState.closing;
+        type["tic_poem"] = TriState.off;
+      } else {
+        processing["verse"] ~= line ~= "\n";
+        if (type["verse_new"] == State.on) {
+          obj_cite_number =
+            ocn_emit(type["ocn_status"]);
+          type["verse_new"] = State.off;
+        } else if (line.matchFirst(rgx.newline_eol_delimiter_only)) {
+          processing["verse"] = processing["verse"].stripRight;
+          type["verse_new"] = State.on;
+          verse_line = TriState.off;
+        }
+        if (type["verse_new"] == State.on) {
+          verse_line=1;
+          an_object[an_object_key] = processing["verse"];
+          debug(poem) {                            // poem (tic) close
+            writefln(
+              "* %s tic\n%s",
+              obj_cite_number,
+              an_object[an_object_key]
+            );
+          }
+          processing.remove("verse");
+          an_object["is"]                           = "verse";
+          auto comp_obj_location =
+            node_construct.node_location_emitter(
+              content_non_header,
+              segment_anchor_tag_that_object_belongs_to,
+              obj_cite_number,
+              cntr,
+              heading_ptr-1,
+              an_object["is"]
+            );
+          auto substantive_obj_misc_tuple =
+            obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, dochead_make_aa);
+          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.use                        = "body";
+          comp_obj_block.is_of                      = "block";
+          comp_obj_block.is_a                       = "verse";
+          comp_obj_block.ocn                        = obj_cite_number;
+          comp_obj_block.obj_cite_number            = (obj_cite_number==0) ? "" : obj_cite_number.to!string;
+          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];
+          the_document_body_section                 ~= comp_obj_block;
+          object_reset(an_object);
+          processing.remove("verse");
+          ++cntr;
+        }
+      }
+    }
+  }
+  void _code_block_(L,O,T)(
+    return ref L line,
+    return ref O an_object,
+    return ref T type
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line)      == char[]));
+      static assert(is(typeof(an_object) == string[string]));
+      static assert(is(typeof(type)      == int[string]));
+    }
+    auto rgx = Rgx();
+    if (type["curly_code"] == TriState.on) {
+      if (line.matchFirst(rgx.block_curly_code_close)) {
+        debug(code) {                                    // code (curly) close
+          writeln(line);
+        }
+        an_object[an_object_key] = an_object[an_object_key]
+          .replaceFirst(rgx.newline_eol_delimiter_only, "")
+          .stripRight;
+        type["blocks"] = TriState.closing;
+        type["code"] = TriState.closing;
+        type["curly_code"] = TriState.off;
+      } else {
+        debug(code) {                                    // code (curly) line
+          writeln(line);
+        }
+        an_object[an_object_key] ~= line ~= "\n";        // code (curly) line
+      }
+    } else if (type["tic_code"] == TriState.on) {
+      if (line.matchFirst(rgx.block_tic_close)) {
+        debug(code) {                                    // code (tic) close
+          writeln(line);
+        }
+        an_object[an_object_key] = an_object[an_object_key]
+          .replaceFirst(rgx.newline_eol_delimiter_only, "")
+          .stripRight;
+        type["blocks"] = TriState.closing;
+        type["code"] = TriState.closing;
+        type["tic_code"] = TriState.off;
+      } else {
+        debug(code) {                                    // code (tic) line
+          writeln(line);
+        }
+        an_object[an_object_key] ~= line ~= "\n";        // code (tic) line
+      }
+    }
+  }
+  void _table_block_(L,O,T,Ma)(
+    return ref L line,
+    return ref O an_object,
+    return ref T type,
+    return ref Ma dochead_make_aa
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line)      == char[]));
+      static assert(is(typeof(an_object) == string[string]));
+      static assert(is(typeof(type)      == int[string]));
+    }
+    auto rgx = Rgx();
+    if (type["curly_table"] == TriState.on) {
+      if (line.matchFirst(rgx.block_curly_table_close)) {
+        debug(table) {                           // table (curly) close
+          writeln(line);
+        }
+        type["blocks"] = TriState.closing;
+        type["table"] = TriState.closing;
+        type["curly_table"] = TriState.off;
+      } else {
+        debug(table) {                           // table
+          writeln(line);
+        }
+        an_object[an_object_key] ~= line ~= "\n";           // build table array (or string)
+      }
+    } else if (type["curly_table_special_markup"] == TriState.on) {
+      if (line.empty) {
+        type["blocks"]                     = TriState.off;
+        type["table"]                      = TriState.off;
+        type["curly_table_special_markup"] = TriState.off;
+        _table_closed_make_special_notation_table_(
+          line,
+          an_object,
+          the_document_body_section,
+          obj_cite_number,
+          comp_obj_heading,
+          cntr,
+          type,
+          dochead_make_aa
+        );
+      } else {
+        debug(table) {
+          writeln(line);
+        }
+        an_object[an_object_key] ~= line ~= "\n";
+      }
+    } else if (type["tic_table"] == TriState.on) {
+      if (line.matchFirst(rgx.block_tic_close)) {
+        debug(table) {                           // table (tic) close
+          writeln(line);
+        }
+        type["blocks"] = TriState.closing;
+        type["table"] = TriState.closing;
+        type["tic_table"] = TriState.off;
+      } else {
+        debug(table) {                           // table
+          writeln(line);
+        }
+        an_object[an_object_key] ~= line ~= "\n";           // build table array (or string)
+      }
+    }
+  }
+  final string biblio_tag_map(A)(A abr) {
+    debug(asserts) {
+      static assert(is(typeof(abr) == string));
+    }
+    auto btm = [
+      "au"                               : "author_raw",
+      "ed"                               : "editor_raw",
+      "ti"                               : "fulltitle",
+      "lng"                              : "language",
+      "jo"                               : "journal",
+      "vol"                              : "volume",
+      "edn"                              : "edition",
+      "yr"                               : "year",
+      "pl"                               : "place",
+      "pb"                               : "publisher",
+      "pub"                              : "publisher",
+      "pg"                               : "pages",
+      "pgs"                              : "pages",
+      "sn"                               : "short_name"
+    ];
+    return btm[abr];
+  }
+  void _biblio_block_(
+    char[]                 line,
+    return ref int[string] type,
+    return ref int         bib_entry,
+    return ref string      biblio_entry_str_json,
+    return ref string[]    biblio_arr_json
+  ) {
+    mixin SiSUbiblio;
+    auto jsn = BibJsnStr();
+    auto rgx = Rgx();
+    if (line.matchFirst(rgx.heading_biblio)) {
+      type["biblio_section"] = TriState.on;
+      type["blurb_section"] = State.off;
+      type["glossary_section"] = State.off;
+    }
+    if (line.empty) {
+      debug {
+        debug(biblioblock) {
+          writeln("---");
+        }
+        debug(biblioblockinclude) {
+          writeln(biblio_entry_str_json.length);
+        }
+      }
+      if ((bib_entry == State.off)
+      && (biblio_entry_str_json.empty)) {
+        bib_entry = State.on;
+        biblio_entry_str_json = jsn.biblio_entry_tags_jsonstr;
+      } else if (!(biblio_entry_str_json.empty)) {
+        bib_entry = State.off;
+        if (!(biblio_entry_str_json == jsn.biblio_entry_tags_jsonstr)) {
+          auto biblio_entry = parseJSON(biblio_entry_str_json);
+          if (biblio_entry["fulltitle"].str.empty) {
+            writeln("check problem entry (Title missing): ", biblio_entry_str_json);
+          } else if ((biblio_entry["author_raw"].str.empty) && (biblio_entry["editor_raw"].str.empty)) {
+            writeln("check problem entry (No author and no editor): ", biblio_entry_str_json);
+          } else {
+            biblio_arr_json ~= biblio_entry_str_json;
+          }
+          biblio_entry_str_json = jsn.biblio_entry_tags_jsonstr;
+        }
+      } else { // CHECK ERROR
+        writeln("?? 2. ERROR ", biblio_entry_str_json, "??");
+        biblio_entry_str_json = "";
+      }
+    } else if (line.matchFirst(rgx.biblio_tags)) {
+      debug(biblioblock) {
+        writeln(line);
+      }
+      auto bt = line.match(rgx.biblio_tags);
+      bib_entry = State.off;
+      st = bt.captures[1].to!string;
+      auto header_tag_value=(bt.captures[2]).to!string;
+      JSONValue j = parseJSON(biblio_entry_str_json);
+      biblio_tag_name = (st.match(rgx.biblio_abbreviations))
+        ? (biblio_tag_map(st))
+        : st;
+      j.object[biblio_tag_name] = header_tag_value;
+      debug(bibliounsortedcheckduplicates) {
+        writeln(biblio_tag_name, ": ", header_tag_value);
+        writeln("--");
+      }
+      switch (biblio_tag_name) {
+      case "author_raw": // author_arr author (fn sn)
+        j["author_arr"] =
+         header_tag_value.split(rgx.arr_delimiter);
+        string tmp;
+        biblioAuthorLoop:
+        foreach (au; j["author_arr"].array) {
+          if (auto x = au.str.match(rgx.name_delimiter)) {
+            tmp ~= x.captures[2] ~ " " ~ x.captures[1] ~ ", ";
+          } else {
+            tmp ~= au.str;
+          }
+        }
+        tmp = (tmp).replace(rgx.trailing_comma, "");
+        j["author"].str = tmp;
+        goto default;
+      case "editor_raw": // editor_arr editor (fn sn)
+        j["editor_arr"] =
+          header_tag_value.split(rgx.arr_delimiter);
+        string tmp;
+        biblioEditorLoop:
+        foreach (ed; j["editor_arr"].array) {
+          if (auto x = ed.str.match(rgx.name_delimiter)) {
+            tmp ~= x.captures[2] ~ " " ~ x.captures[1] ~ ", ";
+          } else {
+            tmp ~= ed.str;
+          }
+        }
+        tmp = (tmp).replace(rgx.trailing_comma, "");
+        j["editor"].str = tmp;
+        goto default;
+      case "fulltitle": // title & subtitle
+        goto default;
+      default:
+        break;
+      }
+      auto s = j.toString();
+      debug(biblio1) {
+        writefln(
+          "* %s: %s\n%s",
+          biblio_tag_name,
+          biblio_tag_entry,
+          j[biblio_tag_name]
+        );
+      }
+      if (line.match(rgx.comment)) {
+        writeln("ERROR", line, "COMMENT");
+        writeln("ERROR", s, "%%");
+      }
+      if (!(match(line, rgx.comment))) {
+        debug(biblioblockinclude) {
+          writeln(line);
+        }
+        biblio_entry_str_json = s;
+      } else {
+        biblio_entry_str_json = "";
+      }
+      header_tag_value="";
+    }
+  }
+  void _table_closed_make_special_notation_table_(
+    char[]                           line,
+    return ref string[string]        an_object,
+    return ref ObjGenericComposite[] the_document_body_section,
+    return ref int                   obj_cite_number,
+    return ref ObjGenericComposite   _comp_obj_heading,
+    return ref int                   cntr,
+    return ref int[string]           type,
+    string[string][string]           dochead_make_aa,
+  ) {
+      comp_obj_block = comp_obj_block.init;
+      obj_cite_number =
+        ocn_emit(type["ocn_status"]);
+      auto comp_obj_location =
+        node_construct.node_location_emitter(
+          content_non_header,
+          segment_anchor_tag_that_object_belongs_to,
+          obj_cite_number,
+          cntr,
+          heading_ptr-1,
+          "table"
+        );
+      an_object["is"] = "table";
+      auto substantive_obj_misc_tuple =
+        obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, "body_nugget", dochead_make_aa);
+      an_object["substantive"]         = substantive_obj_misc_tuple[sObj.content];
+      comp_obj_block.ocn               = obj_cite_number;
+      comp_obj_block.obj_cite_number   = (obj_cite_number==0) ? "" : obj_cite_number.to!string;
+      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;
+  }
+  void _block_flag_line_empty_(B)(
+    B                                   bookindex_extract_hash,
+    char[]                              line,
+    return ref string[string]           an_object,
+    return ref ObjGenericComposite[]    the_document_body_section,
+    return ref string[][string][string] bookindex_unordered_hashes,
+    return ref int                      obj_cite_number,
+    return ref ObjGenericComposite      _comp_obj_heading,
+    return ref int                      cntr,
+    return ref int[string]              type,
+    string[string]                      obj_cite_number_poem,
+    string[string][string]              dochead_make_aa,
+  ) {
+    assert(
+      line.empty,
+      "\nline should be empty:\n  \""
+      ~ line ~ "\""
+    );
+    assert(
+      (type["blocks"] == TriState.closing),
+      "code block status: closed"
+    );
+    assertions_flag_types_block_status_none_or_closed(type);
+    if (type["quote"] == TriState.closing) {
+      obj_cite_number =
+        ocn_emit(type["ocn_status"]);
+      an_object["bookindex_nugget"] =
+        ("bookindex_nugget" in an_object) ? an_object["bookindex_nugget"] : "";
+      bookindex_unordered_hashes =
+        bookindex_extract_hash.bookindex_nugget_hash(
+          an_object["bookindex_nugget"],
+          obj_cite_number,
+          segment_anchor_tag_that_object_belongs_to
+        );
+      an_object["is"] = "quote";
+      auto comp_obj_location =
+        node_construct.node_location_emitter(
+          content_non_header,
+          segment_anchor_tag_that_object_belongs_to,
+          obj_cite_number,
+          cntr,
+          heading_ptr-1,
+          an_object["is"]
+        );
+      auto substantive_obj_misc_tuple =
+        obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, dochead_make_aa);
+      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.use                        = "body";
+      comp_obj_block.is_of                      = "block";
+      comp_obj_block.is_a                       = "quote";
+      comp_obj_block.ocn                        = obj_cite_number;
+      comp_obj_block.obj_cite_number            = (obj_cite_number==0) ? "" : obj_cite_number.to!string;
+      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];
+      the_document_body_section                 ~= comp_obj_block;
+      type["blocks"]                            = TriState.off;
+      type["quote"]                             = TriState.off;
+      object_reset(an_object);
+      processing.remove("verse");
+      ++cntr;
+    } else if (type["group"] == TriState.closing) {
+      obj_cite_number =
+        ocn_emit(type["ocn_status"]);
+      an_object["bookindex_nugget"] =
+        ("bookindex_nugget" in an_object) ? an_object["bookindex_nugget"] : "";
+      bookindex_unordered_hashes =
+        bookindex_extract_hash.bookindex_nugget_hash(
+          an_object["bookindex_nugget"],
+          obj_cite_number,
+          segment_anchor_tag_that_object_belongs_to
+        );
+      an_object["is"] = "group";
+      auto comp_obj_location =
+        node_construct.node_location_emitter(
+          content_non_header,
+          segment_anchor_tag_that_object_belongs_to,
+          obj_cite_number,
+          cntr,
+          heading_ptr-1,
+          an_object["is"]
+        );
+      auto substantive_obj_misc_tuple =
+        obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, dochead_make_aa);
+      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.use                        = "body";
+      comp_obj_block.is_of                      = "block";
+      comp_obj_block.is_a                       = "group";
+      comp_obj_block.ocn                        = obj_cite_number;
+      comp_obj_block.obj_cite_number            = (obj_cite_number==0) ? "" : obj_cite_number.to!string;
+      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];
+      the_document_body_section                 ~= comp_obj_block;
+      type["blocks"]                            = TriState.off;
+      type["group"]                             = TriState.off;
+      object_reset(an_object);
+      processing.remove("verse");
+      ++cntr;
+    } else if (type["block"] == TriState.closing) {
+      obj_cite_number = ocn_emit(type["ocn_status"]);
+      an_object["bookindex_nugget"] =
+        ("bookindex_nugget" in an_object) ? an_object["bookindex_nugget"] : "";
+      bookindex_unordered_hashes =
+        bookindex_extract_hash.bookindex_nugget_hash(
+          an_object["bookindex_nugget"],
+          obj_cite_number,
+          segment_anchor_tag_that_object_belongs_to
+        );
+      an_object["is"] = "block";
+      auto comp_obj_location =
+        node_construct.node_location_emitter(
+          content_non_header,
+          segment_anchor_tag_that_object_belongs_to,
+          obj_cite_number,
+          cntr,
+          heading_ptr-1,
+          an_object["is"]
+        );
+      auto substantive_obj_misc_tuple =
+        obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, dochead_make_aa);
+      an_object["substantive"]                  = substantive_obj_misc_tuple[sObj.content];
+      comp_obj_block                            = comp_obj_block.init;
+      comp_obj_block.use                        = "body";
+      comp_obj_block.is_of                      = "block";
+      comp_obj_block.is_a                       = "block";
+      comp_obj_block.ocn                        = obj_cite_number;
+      comp_obj_block.obj_cite_number            = (obj_cite_number==0) ? "" : obj_cite_number.to!string;
+      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];
+      the_document_body_section                 ~= comp_obj_block;
+      type["blocks"]                            = TriState.off;
+      type["block"]                             = TriState.off;
+      object_reset(an_object);
+      processing.remove("verse");
+      ++cntr;
+    } else if (type["poem"] == TriState.closing) {
+      an_object["bookindex_nugget"] =
+        ("bookindex_nugget" in an_object) ? an_object["bookindex_nugget"] : "";
+      bookindex_unordered_hashes =
+        bookindex_extract_hash.bookindex_nugget_hash(
+          an_object["bookindex_nugget"],
+          obj_cite_number,
+          segment_anchor_tag_that_object_belongs_to
+        );
+      an_object["is"]                           = "verse";
+      auto comp_obj_location =
+        node_construct.node_location_emitter(
+          content_non_header,
+          segment_anchor_tag_that_object_belongs_to,
+          obj_cite_number,
+          cntr,
+          heading_ptr-1,
+          an_object["is"]
+        );
+      comp_obj_poem_ocn                         = comp_obj_poem_ocn.init;
+      comp_obj_poem_ocn.use                     = "body";
+      comp_obj_poem_ocn.is_of                   = "block";
+      comp_obj_poem_ocn.is_a                    = "poem";
+      comp_obj_poem_ocn.ocn                     = obj_cite_number;
+      comp_obj_poem_ocn.obj_cite_number         = (obj_cite_number_poem["start"], obj_cite_number_poem["end"]);
+      comp_obj_poem_ocn.text                    = "";
+      the_document_body_section                 ~= comp_obj_poem_ocn;
+      type["blocks"]                            = TriState.off;
+      type["poem"]                              = TriState.off;
+      object_reset(an_object);
+      processing.remove("verse");
+    } else if (type["code"] == TriState.closing) {
+      obj_cite_number =
+        ocn_emit(type["ocn_status"]);
+      an_object["bookindex_nugget"] =
+        ("bookindex_nugget" in an_object) ? an_object["bookindex_nugget"] : "";
+      bookindex_unordered_hashes =
+        bookindex_extract_hash.bookindex_nugget_hash(
+          an_object["bookindex_nugget"],
+          obj_cite_number,
+          segment_anchor_tag_that_object_belongs_to
+        );
+      an_object["is"] = "code";
+      auto comp_obj_location =
+        node_construct.node_location_emitter(
+          content_non_header,
+          segment_anchor_tag_that_object_belongs_to,
+          obj_cite_number,
+          cntr,
+          heading_ptr-1,
+          an_object["is"]
+        );
+      auto substantive_obj_misc_tuple =
+        obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, dochead_make_aa);
+      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.use                         = "body";
+      comp_obj_code.is_of                       = "block";
+      comp_obj_code.is_a                        = "code";
+      comp_obj_code.ocn                         = obj_cite_number;
+      comp_obj_code.obj_cite_number             = (obj_cite_number==0) ? "" : obj_cite_number.to!string;
+      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];
+      the_document_body_section                 ~= comp_obj_code;
+      type["blocks"]                            = TriState.off;
+      type["code"]                              = TriState.off;
+      object_reset(an_object);
+      processing.remove("verse");
+      ++cntr;
+    } else if (type["table"] == TriState.closing) {
+      comp_obj_block = comp_obj_block.init;
+      obj_cite_number =
+        ocn_emit(type["ocn_status"]);
+      an_object["bookindex_nugget"] =
+        ("bookindex_nugget" in an_object) ? an_object["bookindex_nugget"] : "";
+      bookindex_unordered_hashes =
+        bookindex_extract_hash.bookindex_nugget_hash(
+          an_object["bookindex_nugget"],
+          obj_cite_number,
+          segment_anchor_tag_that_object_belongs_to
+        );
+      an_object["is"] = "table";
+      auto comp_obj_location =
+        node_construct.node_location_emitter(
+          content_non_header,
+          segment_anchor_tag_that_object_belongs_to,
+          obj_cite_number,
+          cntr,
+          heading_ptr-1,
+          an_object["is"]
+        );
+      auto substantive_obj_misc_tuple =
+        obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, dochead_make_aa);
+      an_object["substantive"] = substantive_obj_misc_tuple[sObj.content];
+      comp_obj_block                            = comp_obj_block.init;
+      comp_obj_block.ocn                        = obj_cite_number;
+      comp_obj_block.obj_cite_number            = (obj_cite_number==0) ? "" : obj_cite_number.to!string;
+      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;
+      type["blocks"]                            = TriState.off;
+      type["table"]                             = TriState.off;
+      object_reset(an_object);
+      processing.remove("verse");
+      ++cntr;
+    }
+  }
+  auto _book_index_(L,I,O,T,B)(
+    L      line,
+    return ref I  book_idx_tmp,
+    return ref O  an_object,
+    return ref T  type,
+    B             opt_action,
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line)            == char[]));
+      static assert(is(typeof(book_idx_tmp)    == string));
+      static assert(is(typeof(an_object)       == string[string]));
+      static assert(is(typeof(type)            == int[string]));
+      static assert(is(typeof(opt_action)      == bool[string]));
+    }
+    auto rgx = Rgx();
+    if (auto m = line.match(rgx.book_index)) {
+      /+ match book_index +/
+      debug(bookindexmatch) {                       // book index
+        writefln(
+          "* [bookindex] %s\n",
+          m.captures[1].to!string,
+        );
+      }
+      an_object["bookindex_nugget"] = m.captures[1].to!string;
+    } else if (auto m = line.match(rgx.book_index_open))  {
+      /+ match open book_index +/
+      type["book_index"] = State.on;
+      if (opt_action["backmatter"] && opt_action["section_bookindex"]) {
+        book_idx_tmp = m.captures[1].to!string;
+        debug(bookindexmatch) {                       // book index
+          writefln(
+            "* [bookindex] %s\n",
+            book_idx_tmp,
+          );
+        }
+      }
+    } else if (type["book_index"] == State.on )  {
+      /+ book_index flag set +/
+      if (auto m = line.match(rgx.book_index_close))  {
+        type["book_index"] = State.off;
+        if (opt_action["backmatter"]
+        && opt_action["section_bookindex"]) {
+          an_object["bookindex_nugget"] = book_idx_tmp ~ m.captures[1].to!string;
+          debug(bookindexmatch) {                     // book index
+            writefln(
+              "* [bookindex] %s\n",
+              book_idx_tmp,
+            );
+          }
+        }
+        book_idx_tmp = "";
+      } else {
+        if (opt_action["backmatter"]
+        && opt_action["section_bookindex"]) {
+          book_idx_tmp ~= line;
+        }
+      }
+    }
+  }
+  auto _heading_found_(L,X,H,R,T)(
+    L     line,
+    X     dochead_make_identify_unmarked_headings,
+    return ref H heading_match_str,
+    return ref R heading_match_rgx,
+    return ref T type
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line)                                    == char[]));
+      static assert(is(typeof(dochead_make_identify_unmarked_headings) == string));
+      static assert(is(typeof(heading_match_str)                       == string[string]));
+      static assert(is(typeof(heading_match_rgx)                       == Regex!(char)[string]));
+      static assert(is(typeof(type)                                    == int[string]));
+    }
+    auto rgx = Rgx();
+    if ((dochead_make_identify_unmarked_headings.length > 2)
+    && (type["make_headings"] == State.off)) {
+      /+ headings found +/
+      debug(headingsfound) {
+        writeln(dochead_make_identify_unmarked_headings);
+      }
+      char[][] make_headings_spl =
+        (cast(char[]) dochead_make_identify_unmarked_headings)
+          .split(rgx.make_heading_delimiter);
+      debug(headingsfound) {
+        writeln(make_headings_spl.length);
+        writeln(make_headings_spl);
+      }
+      switch (make_headings_spl.length) {
+      case 7 :
+        if (!empty(make_headings_spl[6])) {
+          heading_match_str["h_4"] =
+            "^(" ~ make_headings_spl[6].to!string ~ ")";
+          heading_match_rgx["h_4"] =
+            regex(heading_match_str["h_4"]);
+        }
+        goto case;
+      case 6 :
+        if (!empty(make_headings_spl[5])) {
+          heading_match_str["h_3"] =
+            "^(" ~ make_headings_spl[5].to!string ~ ")";
+          heading_match_rgx["h_3"] =
+            regex(heading_match_str["h_3"]);
+        }
+        goto case;
+      case 5 :
+        if (!empty(make_headings_spl[4])) {
+          heading_match_str["h_2"] =
+            "^(" ~ make_headings_spl[4].to!string ~ ")";
+          heading_match_rgx["h_2"] =
+            regex(heading_match_str["h_2"]);
+        }
+        goto case;
+      case 4 :
+        if (!empty(make_headings_spl[3])) {
+          heading_match_str["h_1"] =
+            "^(" ~ make_headings_spl[3].to!string ~ ")";
+          heading_match_rgx["h_1"] =
+            regex(heading_match_str["h_1"]);
+        }
+        goto case;
+      case 3 :
+        if (!empty(make_headings_spl[2])) {
+          heading_match_str["h_D"] =
+            "^(" ~ make_headings_spl[2].to!string ~ ")";
+          heading_match_rgx["h_D"] =
+            regex(heading_match_str["h_D"]);
+        }
+        goto case;
+      case 2 :
+        if (!empty(make_headings_spl[1])) {
+          heading_match_str["h_C"] =
+            "^(" ~ make_headings_spl[1].to!string ~ ")";
+          heading_match_rgx["h_C"] =
+            regex(heading_match_str["h_C"]);
+        }
+        goto case;
+      case 1 :
+        if (!empty(make_headings_spl[0])) {
+          heading_match_str["h_B"] =
+            "^(" ~ make_headings_spl[0].to!string ~ ")";
+          heading_match_rgx["h_B"] =
+            regex(heading_match_str["h_B"]);
+        }
+        break;
+      default:
+        break;
+      }
+      type["make_headings"] = State.on;
+    }
+  }
+  auto _heading_make_set_(L,C,R,T)(
+    L     line,
+    C     line_occur,
+    return ref R heading_match_rgx,
+    return ref T type
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line)              == char[]));
+      static assert(is(typeof(line_occur)        == int[string]));
+      static assert(is(typeof(heading_match_rgx) == Regex!(char)[string]));
+      static assert(is(typeof(type)              == int[string]));
+    }
+    if ((type["make_headings"] == State.on)
+    && ((line_occur["para"] == State.off)
+    && (line_occur["heading"] == State.off))
+    && ((type["para"] == State.off)
+    && (type["heading"] == State.off))) {
+      /+ heading make set +/
+      if (line.matchFirst(heading_match_rgx["h_B"])) {
+        line = "B~ " ~ line;
+        debug(headingsfound) {
+          writeln(line);
+        }
+      }
+      if (line.matchFirst(heading_match_rgx["h_C"])) {
+        line = "C~ " ~ line;
+        debug(headingsfound) {
+          writeln(line);
+        }
+      }
+      if (line.matchFirst(heading_match_rgx["h_D"])) {
+        line = "D~ " ~ line;
+        debug(headingsfound) {
+          writeln(line);
+        }
+      }
+      if (line.matchFirst(heading_match_rgx["h_1"])) {
+        line = "1~ " ~ line;
+        debug(headingsfound) {
+          writeln(line);
+        }
+      }
+      if (line.matchFirst(heading_match_rgx["h_2"])) {
+        line = "2~ " ~ line;
+        debug(headingsfound) {
+          writeln(line);
+        }
+      }
+      if (line.matchFirst(heading_match_rgx["h_3"])) {
+        line = "3~ " ~ line;
+        debug(headingsfound) {
+          writeln(line);
+        }
+      }
+      if (line.matchFirst(heading_match_rgx["h_4"])) {
+        line = "4~ " ~ line;
+        debug(headingsfound) {
+          writeln(line);
+        }
+      }
+    }
+    return line;
+  }
+  auto _heading_matched_(L,C,O,K,Lv,Lc,T,Me)(
+    return ref L  line,
+    return ref C  line_occur,
+    return ref O  an_object,
+    return ref K  an_object_key,
+    return ref Lv lv,
+    return ref Lc collapsed_lev,
+    return ref T  type,
+    return ref Me dochead_meta_aa,
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line)            == char[]));
+      static assert(is(typeof(line_occur)      == int[string]));
+      static assert(is(typeof(an_object)       == string[string]));
+      static assert(is(typeof(an_object_key)   == string));
+      static assert(is(typeof(lv)              == int[string]));
+      static assert(is(typeof(collapsed_lev)   == int[string]));
+      static assert(is(typeof(type)            == int[string]));
+      static assert(is(typeof(dochead_meta_aa) == string[string][string]));
+    }
+    auto rgx = Rgx();
+    if (auto m = line.match(rgx.heading)) {
+      /+ heading match +/
+      type["heading"] = State.on;
+      if (line.match(rgx.heading_seg_and_above)) {
+        type["biblio_section"] = State.off;
+        type["glossary_section"] = State.off;
+        type["blurb_section"] = State.off;
+      }
+      type["para"] = State.off;
+      ++line_occur["heading"];
+      an_object[an_object_key] ~= line ~= "\n";
+      an_object["lev"] ~= m.captures[1];
+      assertions_doc_structure(an_object, lv); // includes most of the logic for collapsed levels
+      switch (an_object["lev"]) {
+      case "A":
+        an_object[an_object_key]=(an_object[an_object_key])
+          .replaceFirst(rgx.variable_doc_title,
+            (dochead_meta_aa["title"]["full"] ~ ","))
+          .replaceFirst(rgx.variable_doc_author,
+            dochead_meta_aa["creator"]["author"]);
+        collapsed_lev["h0"] = 0;
+        an_object["lev_collapsed_number"] =
+          collapsed_lev["h0"].to!string;
+        lv["lv"] = DocStructMarkupHeading.h_sect_A;
+        ++lv["h0"];
+        lv["h1"] = State.off;
+        lv["h2"] = State.off;
+        lv["h3"] = State.off;
+        lv["h4"] = State.off;
+        lv["h5"] = State.off;
+        lv["h6"] = State.off;
+        lv["h7"] = State.off;
+        goto default;
+      case "B":
+        collapsed_lev["h1"] = collapsed_lev["h0"] + 1;
+        an_object["lev_collapsed_number"] =
+          collapsed_lev["h1"].to!string;
+        lv["lv"] = DocStructMarkupHeading.h_sect_B;
+        ++lv["h1"];
+        lv["h2"] = State.off;
+        lv["h3"] = State.off;
+        lv["h4"] = State.off;
+        lv["h5"] = State.off;
+        lv["h6"] = State.off;
+        lv["h7"] = State.off;
+        goto default;
+      case "C":
+        collapsed_lev["h2"] = collapsed_lev["h1"] + 1;
+        an_object["lev_collapsed_number"] =
+          collapsed_lev["h2"].to!string;
+        lv["lv"] = DocStructMarkupHeading.h_sect_C;
+        ++lv["h2"];
+        lv["h3"] = State.off;
+        lv["h4"] = State.off;
+        lv["h5"] = State.off;
+        lv["h6"] = State.off;
+        lv["h7"] = State.off;
+        goto default;
+      case "D":
+        collapsed_lev["h3"] = collapsed_lev["h2"] + 1;
+        an_object["lev_collapsed_number"] =
+          collapsed_lev["h3"].to!string;
+        lv["lv"] = DocStructMarkupHeading.h_sect_D;
+        ++lv["h3"];
+        lv["h4"] = State.off;
+        lv["h5"] = State.off;
+        lv["h6"] = State.off;
+        lv["h7"] = State.off;
+        goto default;
+      case "1":
+        if (lv["h3"] > State.off) {
+          collapsed_lev["h4"] = collapsed_lev["h3"] + 1;
+        } else if (lv["h2"] > State.off) {
+          collapsed_lev["h4"] = collapsed_lev["h2"] + 1;
+        } else if (lv["h1"] > State.off) {
+          collapsed_lev["h4"] = collapsed_lev["h1"] + 1;
+        } else if (lv["h0"] > State.off) {
+          collapsed_lev["h4"] = collapsed_lev["h0"] + 1;
+        }
+        an_object["lev_collapsed_number"] =
+          collapsed_lev["h4"].to!string;
+        lv["lv"] = DocStructMarkupHeading.h_text_1;
+        ++lv["h4"];
+        lv["h5"] = State.off;
+        lv["h6"] = State.off;
+        lv["h7"] = State.off;
+        goto default;
+      case "2":
+        if (lv["h5"] > State.off) {
+          an_object["lev_collapsed_number"] =
+            collapsed_lev["h5"].to!string;
+        } else if (lv["h4"] > State.off) {
+          collapsed_lev["h5"] = collapsed_lev["h4"] + 1;
+          an_object["lev_collapsed_number"] =
+            collapsed_lev["h5"].to!string;
+        }
+        lv["lv"] = DocStructMarkupHeading.h_text_2;
+        ++lv["h5"];
+        lv["h6"] = State.off;
+        lv["h7"] = State.off;
+        goto default;
+      case "3":
+        if (lv["h6"] > State.off) {
+          an_object["lev_collapsed_number"] =
+            collapsed_lev["h6"].to!string;
+        } else if (lv["h5"] > State.off) {
+          collapsed_lev["h6"] = collapsed_lev["h5"] + 1;
+          an_object["lev_collapsed_number"] =
+            collapsed_lev["h6"].to!string;
+        }
+        lv["lv"] = DocStructMarkupHeading.h_text_3;
+        ++lv["h6"];
+        lv["h7"] = State.off;
+        goto default;
+      case "4":
+        if (lv["h7"] > State.off) {
+          an_object["lev_collapsed_number"] =
+            collapsed_lev["h7"].to!string;
+        } else if (lv["h6"] > State.off) {
+          collapsed_lev["h7"] = collapsed_lev["h6"] + 1;
+          an_object["lev_collapsed_number"] =
+            collapsed_lev["h7"].to!string;
+        }
+        lv["lv"] = DocStructMarkupHeading.h_text_4;
+        ++lv["h7"];
+        goto default;
+      default:
+        an_object["lev_markup_number"] = lv["lv"].to!string;
+      }
+      debug(heading) {                         // heading
+        writeln(line.strip);
+      }
+    }
+  }
+  void _para_match_(L,O,K,I,B,T,C)(
+    return ref L  line,
+    return ref O  an_object,
+    return ref K  an_object_key,
+    return ref I  indent,
+    return ref B  bullet,
+    return ref T  type,
+    return ref C  line_occur,
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(line)          == char[]));
+      static assert(is(typeof(an_object)     == string[string]));
+      static assert(is(typeof(an_object_key) == string));
+      static assert(is(typeof(indent)        == int[string]));
+      static assert(is(typeof(bullet)        == bool));
+      static assert(is(typeof(type)          == int[string]));
+      static assert(is(typeof(line_occur)    == int[string]));
+    }
+    auto rgx = Rgx();
+    if (line_occur["para"] == State.off) {
+      line = font_faces_line(line);
+      /+ para matches +/
+      type["para"] = State.on;
+      an_object[an_object_key] ~= line;        // body_nugget
+      indent=[
+        "hang_position" : 0,
+        "base_position" : 0,
+      ];
+      bullet = false;
+      if (auto m = line.matchFirst(rgx.para_indent)) {
+        debug(paraindent) {                    // para indent
+          writeln(line);
+        }
+        indent["hang_position"] = (m.captures[1]).to!int;
+        indent["base_position"] = 0;
+      } else if (line.matchFirst(rgx.para_bullet)) {
+        debug(parabullet) {                    // para bullet
+          writeln(line);
+        }
+        bullet = true;
+      } else if (auto m = line.matchFirst(rgx.para_indent_hang)) {
+        debug(paraindenthang) {                // para indent hang
+          writeln(line);
+        }
+        indent=[
+          "hang_position" : (m.captures[1]).to!int,
+          "base_position" : (m.captures[2]).to!int,
+        ];
+      } else if (auto m = line.matchFirst(rgx.para_bullet_indent)) {
+        debug(parabulletindent) {              // para bullet indent
+          writeln(line);
+        }
+        indent=[
+          "hang_position" : (m.captures[1]).to!int,
+          "base_position" : 0,
+        ];
+        bullet = true;
+      }
+      ++line_occur["para"];
+    }
+  }
+  auto font_faces_line(T)(
+    return ref T  textline,
+  ) {
+    auto rgx = Rgx();
+    if (textline.match(rgx.inline_faces_line)) {
+      textline = (textline)
+        .replaceFirst(rgx.inline_emphasis_line,   ("*{$1}*$2"))
+        .replaceFirst(rgx.inline_bold_line,       ("!{$1}!$2"))
+        .replaceFirst(rgx.inline_underscore_line, ("_{$1}_$2"))
+        .replaceFirst(rgx.inline_italics_line,    ("/{$1}/$2"));
+    }
+    return textline;
+  }
+  auto table_instructions(O,H)(
+    return ref O  table_object,
+    return ref H  table_head,
+  ) {
+    auto rgx = Rgx();
+    table_object.use               = "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;
+    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
+      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"];
+      }
+    }
+    return table_object;
+  }
+  auto table_array_munge(O,T)(
+    return ref O  table_object,
+    return ref T  table_array,
+  ) {
+    auto rgx = Rgx();
+    auto mng = InlineMarkup();
+    string _table_substantive;
+    ulong col_num;
+    ulong col_num_;
+    ulong col_num_chk = 0;
+    foreach(idx_r, row; table_array) {
+      debug(table_dev) {
+        writeln("row ", idx_r);
+      }
+      col_num_ = 0;
+      if (col_num == 0
+      || col_num < row.length) {
+        col_num = row.length;
+      }
+      if (col_num_chk == 0) {
+        col_num_chk = col_num;
+      } else if (col_num == 1) {
+        debug(table_dev) {
+          writeln("table note: ");
+        }
+      } else if (col_num_chk != col_num) {
+        debug(table_dev) {
+          writeln("warning irregular number of columns: ", col_num_chk, " != ", col_num);
+        }
+      } else {
+      }
+      foreach(idx_c, col; row) {
+        debug(table_dev) {
+          write(idx_c, ", ");
+        }
+        col_num_ = idx_c;
+        _table_substantive ~= col ~ mng.tc_s;
+        if (idx_r == 0 && comp_obj_block.table_heading) {
+        } else if (idx_r == 1 && col.match(rgx.numeric_col)) {
+          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";
+          }
+        } 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";
+          } else {
+            comp_obj_block.table_column_aligns ~= "l";
+          }
+        }
+      }
+      debug(table_dev) {
+        writeln("");
+      }
+      if (col_num_chk > 0 && (col_num != col_num_chk)) {
+      } else if (col_num == col_num_chk){
+      } else {
+        col_num_chk = col_num;
+      }
+      _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;
+      } else {
+        debug(table_dev) {
+          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) {
+        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;
+      }
+    } 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;
+        }
+        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) {
+        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);
+      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",
+        _table_substantive);
+    }
+    comp_obj_block.text = _table_substantive;
+    return table_object;
+  }
+  auto table_array_munge_open_close(O,T)(
+    return ref O  table_object,
+    return ref T  table_array,
+  ) {
+    auto rgx = Rgx();
+    auto mng = InlineMarkup();
+    string _table_substantive;
+    foreach(row; table_array) {
+      foreach(col; row) {
+        _table_substantive ~= mng.tc_o ~ col ~ mng.tc_c;
+      }
+      _table_substantive ~= "\n";
+    }
+    debug(table_dev) {
+      writeln(_table_substantive);
+    }
+    comp_obj_block.text = _table_substantive;
+    return table_object;
+  }
+  auto table_substantive_munge(O,T)(
+    return ref O  table_object,
+    return ref T  table_substantive,
+  ) {
+    auto rgx = Rgx();
+    auto munge = ObjInlineMarkupMunge();
+    string[] _table_rows = (table_substantive).split(rgx.table_row_delimiter);
+    string[] _table_cols;
+    string[][] _table;
+    foreach(col; _table_rows) {
+      _table_cols = col.split(rgx.table_col_delimiter);
+      _table ~= _table_cols;
+    }
+    table_object = table_array_munge(table_object, _table);
+    return table_object;
+  }
+  auto table_substantive_munge_special(O,T)(
+    return ref O  table_object,
+    return ref T  table_substantive,
+  ) {
+    auto rgx = Rgx();
+    auto munge = ObjInlineMarkupMunge();
+    string[] _table_rows = (table_substantive).split(rgx.table_row_delimiter_special);
+    string[] _table_cols;
+    string[][] _table;
+    foreach(col; _table_rows) {
+      _table_cols = col.split(rgx.table_col_delimiter_special);
+      _table ~= _table_cols;
+    }
+    table_object = table_array_munge(table_object, _table);
+    return table_object;
+  }
+  /+ abstraction functions ↑ +/
+  /+ ↓ abstraction function emitters +/
+  struct OCNemitter {
+    int obj_cite_number, obj_cite_number_;
+    int ocn_emitter(int ocn_status_flag)
+    in { assert(ocn_status_flag <= 3); }
+    body {
+      if (ocn_status_flag == 3) {
+        obj_cite_number = obj_cite_number_ = 1;
+      } else {
+        obj_cite_number=(ocn_status_flag == 0)
+        ? ++obj_cite_number_
+        : 0;
+      }
+      assert(obj_cite_number >= 0);
+      return obj_cite_number;
+    }
+    invariant() {
+    }
+  }
+  /+ +/
+  struct ObjInlineMarkupMunge {
+    string[string] obj_txt;
+    int n_foot, n_foot_reg, n_foot_sp_asterisk, n_foot_sp_plus;
+    string asterisks_;
+    string obj_txt_out, tail, note;
+    auto rgx = Rgx();
+    auto mkup = InlineMarkup();
+    int stage_reset_note_numbers = true;
+    private auto initialize_note_numbers() {
+      n_foot = 0;
+      n_foot_reg = 0;
+      n_foot_sp_asterisk = 0;
+      n_foot_sp_plus = 0;
+    }
+    string url_links(Ot)(Ot obj_txt_in) {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+      auto mng = InlineMarkup();
+      obj_txt_in = obj_txt_in.replaceAll(rgx.inline_mono, (mng.mono ~ "{$1}" ~ mng.mono));
+      /+ url matched +/
+      if (obj_txt_in.match(rgx.inline_url_generic)) {
+        /+ link: naked url: http://url +/
+        if (obj_txt_in.match(rgx.inline_link_naked_url)) {
+          obj_txt_in = (obj_txt_in).replaceAll(
+              rgx.inline_link_naked_url,
+              ("$1"
+                ~ mkup.lnk_o ~ "$2" ~ mkup.lnk_c
+                ~  mkup.url_o ~ "$2" ~  mkup.url_c
+                ~ "$3")            // ("$1{ $2 }$2$3")
+            );
+        }
+        /+ link with helper for endnote including the url:
+             {~^ link which includes url as footnote }http://url
+           maps to:
+             { link which includes url as footnote }http://url~{ { http://url }http://url }~
+        +/
+        if (obj_txt_in.match(rgx.inline_link_endnote_url_helper)) {
+          obj_txt_in = (obj_txt_in).replaceAll(
+            rgx.inline_link_endnote_url_helper_punctuated,
+            (mkup.lnk_o ~ "$1" ~ mkup.lnk_c
+              ~ mkup.url_o ~ "$2" ~ mkup.url_c
+              ~ "~{ " ~ mkup.lnk_o ~ " $2 " ~ mkup.lnk_c
+              ~ mkup.url_o ~ "$2" ~ mkup.url_c
+              ~  " }~$3") // ("{ $1 }$2~{ { $2 }$2 }~$3")
+          );
+          obj_txt_in = (obj_txt_in).replaceAll(
+            rgx.inline_link_endnote_url_helper,
+            (mkup.lnk_o ~ "$1" ~ mkup.lnk_c
+              ~ mkup.url_o ~ "$2" ~ mkup.url_c
+              ~ "~{ " ~ mkup.lnk_o ~ " $2 " ~ mkup.lnk_c
+              ~ mkup.url_o ~ "$2" ~ mkup.url_c
+              ~  " }~") // ("{ $1 }$2~{ { $2 }$2 }~")
+          );
+        }
+        /+ link with regular markup:
+           { linked text or image }http://url
+        +/
+        if (obj_txt_in.match(rgx.inline_link_markup_regular)) {
+          obj_txt_in = (obj_txt_in).replaceAll(
+            rgx.inline_link_markup_regular,
+            ("$1"
+              ~ mkup.lnk_o ~ "$2" ~ mkup.lnk_c
+              ~  mkup.url_o ~ "$3" ~  mkup.url_c
+              ~ "$4")            // ("$1{ $2 }$3$4")
+          );
+        }
+      }
+      obj_txt_in = obj_txt_in.replaceAll(rgx.inline_mono_box, ("#{$1}#"));
+      return obj_txt_in;
+    }
+    auto footnotes_endnotes_markup_and_number_or_stars(Ot)(Ot obj_txt_in, bool reset_note_numbers) {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+      /+ endnotes (regular) +/
+      bool flg_notes_reg  = false;
+      bool flg_notes_star = false;
+      obj_txt_in = (obj_txt_in).replaceAll(
+        rgx.inline_notes_curly,
+        (mkup.en_a_o ~ " $1" ~ mkup.en_a_c)
+      );
+      if (!(stage_reset_note_numbers) && reset_note_numbers) {
+        stage_reset_note_numbers = true;
+      }
+      if (obj_txt_in.match(rgx.inline_notes_al_gen)) {
+        if (auto m = obj_txt_in.matchAll(rgx.inline_text_and_note_al_)) {
+          if (stage_reset_note_numbers) {
+            n_foot = 0;
+            n_foot_reg = 0;
+            n_foot_sp_asterisk = 0;
+            n_foot_sp_plus = 0;
+          }
+          stage_reset_note_numbers = false;
+          foreach(n; m) {
+            if (n.hit.to!string.match(rgx.inline_al_delimiter_open_symbol_star)) {
+              flg_notes_star =  true;
+              ++n_foot_sp_asterisk;
+              asterisks_ = "*";
+              n_foot=n_foot_sp_asterisk;
+              obj_txt_out ~= n.hit.to!string.replaceFirst(
+                rgx.inline_al_delimiter_open_symbol_star,
+                (mkup.en_a_o ~ replicate(asterisks_, n_foot_sp_asterisk) ~ " ")
+              ) ~ "\n";
+            } else if (n.hit.to!string.match(rgx.inline_al_delimiter_open_regular)) {
+              flg_notes_reg =  true;
+              ++n_foot_reg;
+              n_foot=n_foot_reg;
+              obj_txt_out ~= n.hit.to!string.replaceFirst(
+                rgx.inline_al_delimiter_open_regular,
+                (mkup.en_a_o ~ to!string(n_foot) ~ " ")
+              ) ~ "\n";
+            } else {
+              obj_txt_out ~= n.hit.to!string ~ "\n";
+            }
+          }
+        }
+      } else {
+        obj_txt_out = obj_txt_in;
+      }
+      auto t = tuple(
+        obj_txt_out,
+        flg_notes_reg,
+        flg_notes_star,
+      );
+      return t;
+    }
+    private auto object_notes_and_links_(Ot)(Ot obj_txt_in, bool reset_note_numbers=false)
+    in {
+      debug(asserts) {
+        assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      obj_txt_out = "";
+      bool urls = false;
+      tail = "";
+      /+ special endnotes +/
+      obj_txt_in = obj_txt_in.replaceAll(
+        rgx.inline_notes_curly_sp_asterisk,
+        (mkup.en_a_o ~ "*" ~ " $1" ~ mkup.en_a_c)
+      );
+      obj_txt_in =
+        obj_txt_in.replaceAll(
+          rgx.inline_notes_curly_sp_plus,
+          (mkup.en_a_o ~ "+" ~ " $1" ~ mkup.en_a_c)
+        );
+      /+ url matched +/
+      if (obj_txt_in.match(rgx.inline_url)) {
+        urls = true;
+        obj_txt_in = url_links(obj_txt_in);
+      }
+      auto ftn = footnotes_endnotes_markup_and_number_or_stars(obj_txt_in, reset_note_numbers);
+      obj_txt_out = ftn[0];
+      debug(footnotes) {
+        writeln(obj_txt_out, tail);
+      }
+      obj_txt_out = obj_txt_out ~ tail;
+      debug(footnotesdone) {
+        foreach(m; matchAll(obj_txt_out,
+        (mkup.en_a_o ~ `\s*(.+?)` ~ mkup.en_a_c))) {
+          writeln(m.captures[1]);
+          writeln(m.hit);
+        }
+      }
+      auto t = tuple(
+        obj_txt_out,
+        ftn[1],
+        ftn[2],
+        urls,
+      );
+      return t;
+    }
+    auto init()
+    in { }
+    body {
+      auto t = object_notes_and_links_("");
+      return t;
+    }
+    invariant() {
+    }
+    auto munge_heading(Ot)(Ot obj_txt_in, bool reset_note_numbers=false)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      obj_txt["munge"]=(obj_txt_in)
+       .replaceFirst(rgx.heading, "")
+       .replaceFirst(rgx.obj_cite_number_off_all, "")
+       .strip;
+      auto t = object_notes_and_links_(obj_txt["munge"], reset_note_numbers);
+      debug(munge) {
+        writeln(__LINE__);
+        writeln(obj_txt_in);
+        writeln(__LINE__);
+        writeln(obj_txt["munge"].to!string);
+      }
+      return t;
+    }
+    invariant() {
+    }
+    auto munge_para(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      obj_txt["munge"]=(obj_txt_in)
+        .replaceFirst(rgx.para_attribs, "")
+        .replaceFirst(rgx.obj_cite_number_off_all, "");
+      auto t = object_notes_and_links_(obj_txt["munge"]);
+      debug(munge) {
+        writeln(__LINE__);
+        writeln(obj_txt_in);
+        writeln(__LINE__);
+        writeln(obj_txt["munge"].to!string);
+      }
+      return t;
+    }
+    string munge_quote(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      obj_txt["munge"]=obj_txt_in;
+      return obj_txt["munge"];
+    }
+    invariant() {
+    }
+    auto munge_group(string obj_txt_in)
+    in { }
+    body {
+      obj_txt["munge"]=obj_txt_in;
+      auto t = object_notes_and_links_(obj_txt["munge"]);
+      return t;
+    }
+    invariant() {
+    }
+    auto munge_block(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      obj_txt["munge"]=obj_txt_in;
+      auto t = object_notes_and_links_(obj_txt["munge"]);
+      return t;
+    }
+    invariant() {
+    }
+    auto munge_verse(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      obj_txt["munge"]=obj_txt_in;
+      auto t = object_notes_and_links_(obj_txt["munge"]);
+      return t;
+    }
+    invariant() {
+    }
+    string munge_code(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      obj_txt_in = (obj_txt_in).replaceAll(rgx.space, mkup.nbsp);
+      obj_txt["munge"] = obj_txt_in;
+      return obj_txt["munge"];
+    }
+    invariant() {
+    }
+    string munge_table(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      obj_txt["munge"]=obj_txt_in;
+      return obj_txt["munge"];
+    }
+    invariant() {
+    }
+    string munge_comment(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      obj_txt["munge"]=obj_txt_in;
+      return obj_txt["munge"];
+    }
+    invariant() {
+    }
+  }
+  struct ObjInlineMarkup {
+    auto rgx = Rgx();
+    auto munge = ObjInlineMarkupMunge();
+    string[string] obj_txt;
+    auto obj_inline_markup_and_anchor_tags_and_misc(O,K,Ma)(
+      O  obj_,
+      K  obj_key_,
+      Ma dochead_make_aa
+    )
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_)            == string[string]));
+        static assert(is(typeof(obj_key_)        == string));
+        static assert(is(typeof(dochead_make_aa) == string[string][string]));
+      }
+    }
+    body {
+      obj_txt["munge"] = obj_[obj_key_].dup;
+      obj_txt["munge"] = (obj_["is"].match(ctRegex!(`verse|code`)))
+      ? obj_txt["munge"]
+      : strip(obj_txt["munge"]);
+      static __gshared string[] anchor_tags_ = [];
+      auto x = munge.init;
+      bool[string] obj_notes_and_links;
+      obj_notes_and_links["notes_reg"]  = false;
+      obj_notes_and_links["notes_star"] = false;
+      obj_notes_and_links["links"]      = false;
+      switch (obj_["is"]) {
+      case "heading":
+        static __gshared string anchor_tag = "";
+        obj_txt["munge"]=_configured_auto_heading_numbering_and_segment_anchor_tags(obj_txt["munge"], obj_, dochead_make_aa);
+        obj_txt["munge"]=_make_segment_anchor_tags_if_none_provided(obj_txt["munge"], obj_["lev"]);
+        if (auto m = obj_txt["munge"].match(rgx.heading_anchor_tag)) {
+          anchor_tag = m.captures[1];
+          anchor_tags_ ~= anchor_tag;
+        } else if (obj_["lev"] == "1") {
+          writeln("heading anchor tag missing: ", obj_txt["munge"]);
+        }
+        x =munge.munge_heading(obj_txt["munge"], reset_note_numbers);
+        reset_note_numbers=false;
+        goto default;
+      case "para":
+        x = munge.munge_para(obj_txt["munge"]);
+        goto default;
+      case "group":
+        x = munge.munge_group(obj_txt["munge"]);
+        goto default;
+      case "block":
+        x = munge.munge_block(obj_txt["munge"]);
+        goto default;
+      case "verse":
+        x = munge.munge_verse(obj_txt["munge"]);
+        goto default;
+      case "code":
+        obj_txt["munge"] = munge.munge_code(obj_txt["munge"]);
+        break;
+      case "table":
+        obj_txt["munge"] = munge.munge_table(obj_txt["munge"]);
+        break;
+      case "quote":
+        obj_txt["munge"] = munge.munge_quote(obj_txt["munge"]);
+        break;
+      case "comment":
+        obj_txt["munge"] = munge.munge_comment(obj_txt["munge"]);
+        break;
+      case "doc_end_reset":
+        munge.initialize_note_numbers();
+        break;
+      default:
+        /+ para, heading, group, block, verse +/
+        obj_txt["munge"]                  = x[0];
+        obj_notes_and_links["notes_reg"]  = x[1];
+        obj_notes_and_links["notes_star"] = x[2];
+        obj_notes_and_links["links"]      = x[3];
+        break;
+      }
+      auto t = tuple(
+        obj_txt["munge"],
+        anchor_tags_,
+        obj_notes_and_links["notes_reg"],
+        obj_notes_and_links["notes_star"],
+        obj_notes_and_links["links"],
+      );
+      anchor_tags_=[];
+      return t;
+    }
+    invariant() {
+    }
+    auto _clean_heading_toc_(Toc)(
+      Toc heading_toc_,
+    ) {
+     debug(asserts) {
+       static assert(is(typeof(heading_toc_) == char[]));
+     }
+     auto m = (cast(char[]) heading_toc_).matchFirst(rgx.heading);
+     heading_toc_ = (m.post).replaceAll(
+       rgx.inline_notes_curly_gen,
+       "");
+     return heading_toc_;
+    };
+    auto table_of_contents_gather_headings(O,Ma,Ts,Ta,X,Toc)(
+      O            obj_,
+      Ma           dochead_make_aa,
+      Ts           segment_anchor_tag_that_object_belongs_to,
+      Ta           _anchor_tag,
+      return ref X lev4_subtoc,
+      Toc          the_table_of_contents_section,
+    )
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_)                                      == string[string]));
+        static assert(is(typeof(dochead_make_aa)                           == string[string][string]));
+        static assert(is(typeof(segment_anchor_tag_that_object_belongs_to) == string));
+        static assert(is(typeof(_anchor_tag)                               == string));
+        static assert(is(typeof(lev4_subtoc)                               == string[][string]));
+        static assert(is(typeof(the_table_of_contents_section)             == ObjGenericComposite[][string]));
+      }
+    }
+    body {
+      ObjGenericComposite comp_obj_toc;
+      mixin InternalMarkup;
+      auto mkup = InlineMarkup();
+      char[] heading_toc_ = (obj_["substantive"].dup.strip.to!(char[])).replaceAll(rgx.inline_notes_al, "");
+      heading_toc_ = _clean_heading_toc_(heading_toc_);
+      auto attrib="";
+      string toc_txt_, subtoc_txt_;
+      int[string] indent;
+      if (obj_["lev_markup_number"].to!int > 0) {
+        indent=[
+          "hang_position" : obj_["lev_markup_number"].to!int,
+          "base_position" : obj_["lev_markup_number"].to!int,
+        ];
+        toc_txt_ = format(
+          "{ %s }#%s",
+          heading_toc_,
+          _anchor_tag,
+        );
+        toc_txt_= munge.url_links(toc_txt_);
+        comp_obj_toc                       = comp_obj_toc.init;
+        comp_obj_toc.use                   = "frontmatter";
+        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.indent_hang           = indent["hang_position"];
+        comp_obj_toc.indent_base           = indent["base_position"];
+        comp_obj_toc.bullet                = false;
+        comp_obj_toc.text                  = toc_txt_.to!string.strip;
+        comp_obj_toc.inline_links          = true;
+        the_table_of_contents_section["scroll"] ~= comp_obj_toc;
+      } else {
+        indent=[
+          "hang_position" : 0,
+          "base_position" : 0,
+        ];
+        comp_obj_toc                       = comp_obj_toc.init;
+        comp_obj_toc.use                   = "frontmatter";
+        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.indent_hang           = indent["hang_position"];
+        comp_obj_toc.indent_base           = indent["base_position"];
+        comp_obj_toc.bullet                = false;
+        comp_obj_toc.text                  = "Table of Contents";
+        comp_obj_toc.inline_links          = true;
+        the_table_of_contents_section["scroll"] ~= comp_obj_toc;
+      }
+      comp_obj_toc                       = comp_obj_toc.init;
+      comp_obj_toc.use                   = "frontmatter";
+      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.bullet                = false;
+      comp_obj_toc.inline_links          = true;
+      switch (obj_["lev_markup_number"].to!int) {
+      case 0:
+        indent=[
+          "hang_position" : 0,
+          "base_position" : 0,
+        ];
+        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.text                    = toc_txt_.to!string.strip;
+        comp_obj_toc.inline_links            = true;
+        the_table_of_contents_section["seg"] ~= comp_obj_toc;
+        break;
+      case 1: .. case 3:
+        indent=[
+          "hang_position" : obj_["lev_markup_number"].to!int,
+          "base_position" : obj_["lev_markup_number"].to!int,
+        ];
+        toc_txt_ = format(
+          "%s",
+          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.text                    = toc_txt_.to!string.strip;
+        comp_obj_toc.inline_links            = true;
+        the_table_of_contents_section["seg"] ~= comp_obj_toc;
+        break;
+      case 4:
+        toc_txt_ = format(
+          "{ %s }%s%s%s",
+          heading_toc_,
+          mkup.mark_internal_site_lnk,
+          segment_anchor_tag_that_object_belongs_to,
+          ".fnSuffix",
+        );
+        lev4_subtoc[segment_anchor_tag_that_object_belongs_to] = [];
+        toc_txt_= munge.url_links(toc_txt_);
+        indent=[
+          "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.text                    = toc_txt_.to!string.strip;
+        comp_obj_toc.inline_links            = true;
+        the_table_of_contents_section["seg"] ~= comp_obj_toc;
+        break;
+      case 5: .. case 7:
+        toc_txt_ = format(
+          "{ %s }%s%s%s#%s",
+          heading_toc_,
+          mkup.mark_internal_site_lnk,
+          segment_anchor_tag_that_object_belongs_to,
+          ".fnSuffix",
+          _anchor_tag,
+        );
+        subtoc_txt_ = format(
+          "{ %s }#%s",
+          heading_toc_,
+          _anchor_tag,
+        );
+        lev4_subtoc[segment_anchor_tag_that_object_belongs_to]
+        ~= munge.url_links(obj_["lev_markup_number"]
+             ~ "~ " ~ subtoc_txt_.to!string.strip
+           );
+        toc_txt_= munge.url_links(toc_txt_);
+        indent=[
+          "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.text                    = toc_txt_.to!string.strip;
+        comp_obj_toc.inline_links            = true;
+        the_table_of_contents_section["seg"] ~= comp_obj_toc;
+        break;
+      default:
+        break;
+      }
+      return the_table_of_contents_section;
+    }
+    invariant() {
+    }
+  private:
+    static string _configured_auto_heading_numbering_and_segment_anchor_tags(M,O,Ma)(
+      M  munge_,
+      O  obj_,
+      Ma dochead_make_aa
+    ) {
+      debug(asserts) {
+        static assert(is(typeof(munge_)          == string));
+        static assert(is(typeof(obj_)            == string[string]));
+        static assert(is(typeof(dochead_make_aa) == string[string][string]));
+      }
+      if (dochead_make_aa["make"]["num_top"].length > 0) {
+        static __gshared int heading_num_top_level=9;
+        static __gshared int heading_num_depth=2;
+        static __gshared int heading_num_0 = 0;
+        static __gshared int heading_num_1 = 0;
+        static __gshared int heading_num_2 = 0;
+        static __gshared int heading_num_3 = 0;
+        static __gshared string heading_number_auto_composite = "";
+        if (heading_num_top_level==9) {
+          if (dochead_make_aa["make"]["num_depth"].length > 0) {
+            heading_num_depth = dochead_make_aa["make"]["num_depth"].to!uint;
+          }
+          switch (dochead_make_aa["make"]["num_top"]) {
+          case "A":
+            break;
+          case "B":
+            heading_num_top_level=1;
+            break;
+          case "C":
+            heading_num_top_level=2;
+            break;
+          case "D":
+            heading_num_top_level=3;
+            break;
+          case "1":
+            heading_num_top_level=4;
+            break;
+          case "2":
+            heading_num_top_level=5;
+            break;
+          case "3":
+            heading_num_top_level=6;
+            break;
+          case "4":
+            heading_num_top_level=7;
+            break;
+          default:
+            break;
+          }
+        }
+        /+ num_depth minimum 0
+           (1.) default 2 (1.1.1) max 3 (1.1.1.1) implement +/
+        if (
+          heading_num_top_level
+          > obj_["lev_markup_number"].to!uint
+        ) {
+          heading_num_1 = 0;
+          heading_num_2 = 0;
+          heading_num_3 = 0;
+        } else if (
+          heading_num_top_level
+          == obj_["lev_markup_number"].to!uint
+        ) {
+          heading_num_0 ++;
+          heading_num_1 = 0;
+          heading_num_2 = 0;
+          heading_num_3 = 0;
+        } else if (
+          heading_num_top_level
+          == (obj_["lev_markup_number"].to!uint - 1)
+        ) {
+          heading_num_1 ++;
+          heading_num_2 = 0;
+          heading_num_3 = 0;
+        } else if (
+          heading_num_top_level
+          == (obj_["lev_markup_number"].to!uint - 2)
+        ) {
+          heading_num_2 ++;
+          heading_num_3 = 0;
+        } else if (
+          heading_num_top_level
+          == (obj_["lev_markup_number"].to!uint - 3)
+        ) {
+          heading_num_3 ++;
+        }
+        if (heading_num_3 > 0) {
+          heading_number_auto_composite =
+            (heading_num_depth == 3)
+            ? ( heading_num_0.to!string ~ "."
+                ~ heading_num_1.to!string ~ "."
+                ~ heading_num_2.to!string ~ "."
+                ~ heading_num_3.to!string
+              )
+            : "";
+        } else if (heading_num_2 > 0) {
+          heading_number_auto_composite =
+            ((heading_num_depth >= 2)
+            && (heading_num_depth <= 3))
+            ?  ( heading_num_0.to!string ~ "."
+                 ~ heading_num_1.to!string ~ "."
+                 ~ heading_num_2.to!string
+               )
+            : "";
+        } else if (heading_num_1 > 0) {
+          heading_number_auto_composite =
+            ((heading_num_depth >= 1)
+            && (heading_num_depth <= 3))
+            ? ( heading_num_0.to!string ~ "."
+                 ~ heading_num_1.to!string
+               )
+            : "";
+        } else if (heading_num_0 > 0) {
+          heading_number_auto_composite =
+            ((heading_num_depth >= 0)
+            && (heading_num_depth <= 3))
+            ?  (heading_num_0.to!string)
+            : "";
+        } else {
+          heading_number_auto_composite = "";
+        }
+        debug(heading_number_auto) {
+          writeln(heading_number_auto_composite);
+        }
+        if ((!empty(heading_number_auto_composite))
+        && (obj_["lev_markup_number"].to!uint >= heading_num_top_level)) {
+          munge_=(munge_)
+          .replaceFirst(rgx.heading,
+            "$1~$2 " ~ heading_number_auto_composite ~ ". ")
+          .replaceFirst(rgx.heading_marker_missing_tag,
+            "$1~" ~ heading_number_auto_composite ~ " ");
+        }
+      }
+      return munge_;
+    }
+    static string _make_segment_anchor_tags_if_none_provided(M,Lv)(M munge_, Lv lev_) {
+      debug(asserts) {
+        static assert(is(typeof(munge_) == string));
+        static assert(is(typeof(lev_)   == string));
+      }
+      if (!(munge_.match(rgx.heading_anchor_tag))) {
+        if (munge_.match(rgx.heading_identify_anchor_tag)) {
+          if (auto m = munge_.match(rgx.heading_extract_named_anchor_tag)) {
+            munge_=(munge_).replaceFirst(
+              rgx.heading_marker_missing_tag,
+              "$1~" ~ m.captures[1].toLower ~ "_"  ~ m.captures[2] ~ " ");
+          } else if (auto m = munge_.match(rgx.heading_extract_unnamed_anchor_tag)) {
+            munge_=(munge_).replaceFirst(
+              rgx.heading_marker_missing_tag,
+              "$1~" ~ "s" ~ m.captures[1] ~ " ");
+          }
+        } else if (lev_ == "1") { // (if not successful) manufacture a unique anchor tag for lev=="1"
+          static __gshared int heading_num_lev1 = 0;
+          heading_num_lev1 ++;
+          munge_=(munge_).replaceFirst(
+            rgx.heading_marker_missing_tag,
+            "$1~" ~ "x" ~ heading_num_lev1.to!string ~ " ");
+        }
+      }
+      return munge_;
+    }
+    unittest {
+      string txt_lev="1";
+      string txt_in, txt_out;
+  
+      txt_in = "1~copyright Copyright";
+      txt_out ="1~copyright Copyright";
+      assert(_make_segment_anchor_tags_if_none_provided(txt_in, txt_lev) == txt_out);
+  
+      txt_in = "1~ 6. Writing Copyright Licenses";
+      txt_out ="1~s6 6. Writing Copyright Licenses";
+      assert(_make_segment_anchor_tags_if_none_provided(txt_in, txt_lev) == txt_out);
+  
+      txt_in= "1~ 1. Reinforcing trends";
+      txt_out= "1~s1 1. Reinforcing trends";
+      assert(_make_segment_anchor_tags_if_none_provided(txt_in, txt_lev) == txt_out);
+  
+      txt_in= "1~ 11 SCIENCE AS A COMMONS";
+      txt_out= "1~s11 11 SCIENCE AS A COMMONS";
+      assert(_make_segment_anchor_tags_if_none_provided(txt_in, txt_lev) == txt_out);
+  
+      txt_in= "1~ Chapter 1";
+      txt_out="1~chapter_1 Chapter 1";
+      assert(_make_segment_anchor_tags_if_none_provided(txt_in, txt_lev) == txt_out);
+  
+      txt_in= "1~ Chapter 1.";
+      txt_out="1~chapter_1 Chapter 1.";
+      assert(_make_segment_anchor_tags_if_none_provided(txt_in, txt_lev) == txt_out);
+  
+      txt_in= "1~ Chapter 1: Done";
+      txt_out="1~chapter_1 Chapter 1: Done";
+      assert(_make_segment_anchor_tags_if_none_provided(txt_in, txt_lev) == txt_out);
+  
+      txt_in=  "1~ Chapter 11 - The Battle Over the Institutional Ecology of the Digital Environment";
+      txt_out= "1~chapter_11 Chapter 11 - The Battle Over the Institutional Ecology of the Digital Environment";
+      assert(_make_segment_anchor_tags_if_none_provided(txt_in, txt_lev) == txt_out);
+  
+      txt_in= "1~ CHAPTER I.";
+      txt_out="1~x1 CHAPTER I.";
+      assert(_make_segment_anchor_tags_if_none_provided(txt_in, txt_lev) == txt_out);
+  
+      txt_in= "1~ CHAPTER II.";
+      txt_out="1~x2 CHAPTER II.";
+      assert(_make_segment_anchor_tags_if_none_provided(txt_in, txt_lev) == txt_out);
+    }
+  }
+  /+ +/
+  struct ObjAttributes {
+    string[string] _obj_attrib;
+    string obj_attributes(Oi,OR,OH)(
+      Oi obj_is_,
+      OR obj_raw,
+      OH _comp_obj_heading,
+    )
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_is_)           == string));
+        static assert(is(typeof(obj_raw)           == string));
+        static assert(is(typeof(_comp_obj_heading) == ObjGenericComposite));
+      }
+    }
+    body {
+      scope(exit) {
+        destroy(obj_is_);
+        destroy(obj_raw);
+        destroy(_comp_obj_heading);
+      }
+      _obj_attrib["json"] ="{";
+      switch (obj_is_) {
+      case "heading":
+        _obj_attrib["json"] ~= _heading(obj_raw);
+        break;
+      case "para":
+        _obj_attrib["json"] ~= _para_and_blocks(obj_raw)
+        ~ _para(obj_raw);
+        break;
+      case "code":
+        _obj_attrib["json"] ~= _code(obj_raw);
+        break;
+      case "group":
+        _obj_attrib["json"] ~= _para_and_blocks(obj_raw)
+        ~ _group(obj_raw);
+        break;
+      case "block":
+        _obj_attrib["json"] ~= _para_and_blocks(obj_raw)
+        ~ _block(obj_raw);
+        break;
+      case "verse":
+        _obj_attrib["json"] ~= _verse(obj_raw);
+        break;
+      case "quote":
+        _obj_attrib["json"] ~= _quote(obj_raw);
+        break;
+      case "table":
+        _obj_attrib["json"] ~= _table(obj_raw);
+        break;
+      case "comment":
+        _obj_attrib["json"] ~= _comment(obj_raw);
+        break;
+      default:
+        _obj_attrib["json"] ~= _para(obj_raw);
+        break;
+      }
+      _obj_attrib["json"] ~=" }";
+      _obj_attrib["json"]=_set_additional_values_parse_as_json(_obj_attrib["json"], obj_is_, _comp_obj_heading);
+      debug(structattrib) {
+        if (oa_j["is"].str() == "heading") {
+          writeln(_obj_attrib["json"]);
+          writeln(
+            "is: ", oa_j["is"].str(),
+            "; obj_cite_number: ", oa_j["obj_cite_number"].integer()
+          );
+        }
+      }
+      return _obj_attrib["json"];
+    }
+    invariant() {
+    }
+    private:
+    string _obj_attributes;
+    string _para_and_blocks(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      if (obj_txt_in.matchFirst(rgx.para_bullet)) {
+        _obj_attributes =" \"bullet\": \"true\","
+        ~ " \"indent_hang\": 0,"
+        ~ " \"indent_base\": 0,";
+      } else if (auto m = obj_txt_in.matchFirst(rgx.para_bullet_indent)) {
+        _obj_attributes =" \"bullet\": \"true\","
+        ~ " \"indent_hang\": " ~ m.captures[1].to!string ~ ","
+        ~ " \"indent_base\": " ~ m.captures[1].to!string ~ ",";
+      } else if (auto m = obj_txt_in.matchFirst(rgx.para_indent_hang)) {
+        _obj_attributes =" \"bullet\": \"false\","
+        ~ " \"indent_hang\": " ~ m.captures[1].to!string ~ ","
+        ~ " \"indent_base\": " ~  m.captures[2].to!string ~ ",";
+      } else if (auto m = obj_txt_in.matchFirst(rgx.para_indent)) {
+        _obj_attributes =" \"bullet\": \"false\","
+        ~ " \"indent_hang\": " ~ m.captures[1].to!string ~ ","
+        ~ " \"indent_base\": " ~ m.captures[1].to!string ~ ",";
+      } else {
+        _obj_attributes =" \"bullet\": \"false\","
+        ~ " \"indent_hang\": 0,"
+        ~ " \"indent_base\": 0,";
+      }
+      return _obj_attributes;
+    }
+    string _heading(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      _obj_attributes = " \"use\": \"content\","
+      ~ " \"of\": \"para\","
+      ~ " \"is\": \"heading\"";
+      return _obj_attributes;
+    }
+    invariant() {
+    }
+    string _para(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      _obj_attributes = " \"use\": \"content\","
+      ~ " \"of\": \"para\","
+      ~ " \"is\": \"para\"";
+      return _obj_attributes;
+    }
+    invariant() {
+    }
+    string _quote(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      _obj_attributes = " \"use\": \"content\","
+      ~ " \"of\": \"block\","
+      ~ " \"is\": \"quote\"";
+      return _obj_attributes;
+    }
+    invariant() {
+    }
+    string _group(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      _obj_attributes = " \"use\": \"content\","
+      ~ " \"of\": \"block\","
+      ~ " \"is\": \"group\"";
+      return _obj_attributes;
+    }
+    invariant() {
+    }
+    string _block(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      _obj_attributes = " \"use\": \"content\","
+      ~ " \"of\": \"block\","
+      ~ " \"is\": \"block\"";
+      return _obj_attributes;
+    }
+    invariant() {
+    }
+    string _verse(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      _obj_attributes = " \"use\": \"content\","
+      ~ " \"of\": \"block\","
+      ~ " \"is\": \"verse\"";
+      return _obj_attributes;
+    }
+    invariant() {
+    }
+    string _code(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      _obj_attributes = " \"use\": \"content\","
+      ~ " \"of\": \"block\","
+      ~ " \"is\": \"code\"";
+      return _obj_attributes;
+    }
+    invariant() {
+    }
+    string _table(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      _obj_attributes = " \"use\": \"content\","
+      ~ " \"of\": \"block\","
+      ~ " \"is\": \"table\"";
+      return _obj_attributes;
+    }
+    invariant() {
+    }
+    string _comment(Ot)(Ot obj_txt_in)
+    in {
+      debug(asserts) {
+        static assert(is(typeof(obj_txt_in) == string));
+      }
+    }
+    body {
+      _obj_attributes = " \"use\": \"comment\","
+      ~ " \"of\": \"comment\","
+      ~ " \"is\": \"comment\"";
+      return _obj_attributes;
+    }
+    invariant() {
+    }
+    string _set_additional_values_parse_as_json(OA,Oi,OH)(
+      OA _obj_attrib,
+      Oi obj_is_,
+      OH _comp_obj_heading,
+    ) {
+      debug(asserts) {
+        static assert(is(typeof(_obj_attrib)       == string));
+        static assert(is(typeof(obj_is_)           == string));
+        static assert(is(typeof(_comp_obj_heading) == ObjGenericComposite));
+      }
+      JSONValue oa_j = parseJSON(_obj_attrib);
+      assert(
+        (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["heading_ptr"] =
+          _comp_obj_heading.ptr_heading;
+        oa_j.object["doc_object_ptr"] =
+          _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;
+      _obj_attrib = oa_j.toString();
+      return _obj_attrib;
+    }
+  }
+  /+ +/
+  struct BookIndexNuggetHash {
+    string main_term, sub_term, sub_term_bits;
+    int obj_cite_number_offset, obj_cite_number_endpoint;
+    string[] obj_cite_numbers;
+    string[][string][string] bi;
+    string[][string][string] hash_nugget;
+    string[] bi_main_terms_split_arr;
+    string[][string][string] bookindex_nugget_hash(BI,N,S)(
+      BI bookindex_section,
+      N  obj_cite_number,
+      S  segment_anchor_tag,
+    )
+    in {
+      debug(asserts) {
+        static assert(is(typeof(bookindex_section) == string));
+        static assert(is(typeof(obj_cite_number)   == int));
+      }
+      debug(bookindexraw) {
+        if (!bookindex_section.empty) {
+          writeln(
+            "* [bookindex] ",
+            "[", obj_cite_number.to!string, ": ", segment_anchor_tag, "] ", bookindex_section
+          );
+        }
+      }
+    }
+    body {
+      auto rgx = Rgx();
+      if (!bookindex_section.empty) {
+        auto bi_main_terms_split_arr =
+          bookindex_section.split(rgx.bi_main_terms_split);
+        foreach (bi_main_terms_content; bi_main_terms_split_arr) {
+          auto bi_main_term_and_rest =
+            bi_main_terms_content.split(rgx.bi_main_term_plus_rest_split);
+          if (auto m = bi_main_term_and_rest[0].match(
+            rgx.bi_term_and_obj_cite_numbers_match)
+          ) {
+            main_term = m.captures[1].strip;
+            obj_cite_number_offset = m.captures[2].to!int;
+            obj_cite_number_endpoint=(obj_cite_number + obj_cite_number_offset);
+            obj_cite_numbers ~= (obj_cite_number.to!string ~ "-" ~ to!string(obj_cite_number_endpoint)
+            ~ ":" ~ segment_anchor_tag);
+          } else {
+            main_term = bi_main_term_and_rest[0].strip;
+            obj_cite_numbers ~= obj_cite_number.to!string
+            ~ ":" ~ segment_anchor_tag;
+          }
+          bi[main_term]["_a"] ~= obj_cite_numbers;
+          obj_cite_numbers=null;
+          if (bi_main_term_and_rest.length > 1) {
+            auto bi_sub_terms_split_arr =
+              bi_main_term_and_rest[1].split(
+                rgx.bi_sub_terms_plus_obj_cite_number_offset_split
+              );
+            foreach (sub_terms_bits; bi_sub_terms_split_arr) {
+              if (auto m = sub_terms_bits.match(rgx.bi_term_and_obj_cite_numbers_match)) {
+                sub_term = m.captures[1].strip;
+                obj_cite_number_offset = m.captures[2].to!int;
+                obj_cite_number_endpoint=(obj_cite_number + obj_cite_number_offset);
+                obj_cite_numbers ~= (obj_cite_number.to!string ~ " - " ~ to!string(obj_cite_number_endpoint)
+                ~ ":" ~ segment_anchor_tag);
+              } else {
+                sub_term = sub_terms_bits.strip;
+                obj_cite_numbers ~= to!string(obj_cite_number)
+                ~ ":" ~ segment_anchor_tag;
+              }
+              if (!empty(sub_term)) {
+                bi[main_term][sub_term] ~= obj_cite_numbers;
+              }
+              obj_cite_numbers=null;
+            }
+          }
+        }
+      }
+      hash_nugget = bi;
+      return hash_nugget;
+    }
+    invariant() {
+    }
+  }
+  struct BookIndexReportIndent {
+    int mkn, skn;
+    auto bookindex_report_indented(BI)(
+      BI bookindex_unordered_hashes
+    ) {
+      debug(asserts) {
+        static assert(is(typeof(bookindex_unordered_hashes) == string[][string][string]));
+      }
+      auto mainkeys=
+        bookindex_unordered_hashes.byKey.array.sort().release;
+      foreach (mainkey; mainkeys) {
+        debug(bookindex1) {
+          writeln(mainkey);
+        }
+        auto subkeys=
+          bookindex_unordered_hashes[mainkey].byKey.array.sort().release;
+        foreach (subkey; subkeys) {
+          debug(bookindex1) {
+            writeln("  ", subkey);
+            writeln("    ", to!string(
+              bookindex_unordered_hashes[mainkey][subkey]
+            ));
+          }
+          ++skn;
+        }
+        ++mkn;
+      }
+    }
+  }
+  struct BookIndexReportSection {
+    int  mkn, skn;
+    auto rgx = Rgx();
+    auto munge = ObjInlineMarkupMunge();
+    auto bookindex_write_section(BI)(
+      BI bookindex_unordered_hashes
+    ) {
+      debug(asserts) {
+        static assert(is(typeof(bookindex_unordered_hashes) == string[][string][string]));
+      }
+      auto mainkeys=bookindex_unordered_hashes.byKey.array.sort().release;
+      foreach (mainkey; mainkeys) {
+        write("_0_1 !{", mainkey, "}! ");
+        foreach (ref_; bookindex_unordered_hashes[mainkey]["_a"]) {
+          auto go = (ref_).replaceAll(rgx.book_index_go, "$1");
+          write(" {", ref_, "}#", go, ", ");
+        }
+        writeln(" \\\\");
+        bookindex_unordered_hashes[mainkey].remove("_a");
+        auto subkeys=
+          bookindex_unordered_hashes[mainkey].byKey.array.sort().release;
+        foreach (subkey; subkeys) {
+          write("  ", subkey, ", ");
+          foreach (ref_; bookindex_unordered_hashes[mainkey][subkey]) {
+            auto go = (ref_).replaceAll(rgx.book_index_go, "$1");
+            write(" {", ref_, "}#", go, ", ");
+          }
+          writeln(" \\\\");
+          ++skn;
+        }
+        ++mkn;
+      }
+    }
+    auto bookindex_build_abstraction_section(BI,N,B)(
+      BI bookindex_unordered_hashes,
+      N  obj_cite_number,
+      B  opt_action,
+    ) {
+      debug(asserts) {
+        static assert(is(typeof(bookindex_unordered_hashes)                == string[][string][string]));
+        static assert(is(typeof(obj_cite_number)                           == int));
+        static assert(is(typeof(opt_action)                                == bool[string]));
+      }
+      mixin SiSUnode;
+      mixin InternalMarkup;
+      auto mkup = InlineMarkup();
+      string type_is;
+      string lev;
+      int heading_lev_markup, heading_lev_collapsed;
+      string attrib;
+      int[string] indent;
+      auto mainkeys =
+        bookindex_unordered_hashes.byKey.array.sort().release;
+      ObjGenericComposite[][string] bookindex_section;
+      ObjGenericComposite comp_obj_heading_, comp_obj_para;
+      auto node_para_int_ = node_metadata_para_int;
+      auto node_para_str_ = node_metadata_para_str;
+      if ((mainkeys.length > 0)
+      && (opt_action["backmatter"]
+      && 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_.use                   = "backmatter";
+        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_.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_;
+        ++obj_cite_number;
+        ++mkn;
+        comp_obj_heading_                       = comp_obj_heading_.init;
+        comp_obj_heading_.use                   = "backmatter";
+        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_.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_;
+        ++obj_cite_number;
+        ++mkn;
+        import std.array : appender;
+        auto buffer = appender!(char[])();
+        string[dchar] transTable = [' ' : "_"];
+        foreach (mainkey; mainkeys) {
+          bi_tmp_tags = [""];
+          bi_tmp_scroll = "!{" ~ mainkey ~ "}! ";
+          buffer.clear();
+          bi_tmp_tags ~= translate(mainkey, transTable);
+          bi_tmp_seg = "!{" ~ mainkey ~ "}! ";
+          auto bkidx_lnk_seg(string locs) {
+            string markup = "";
+            if (auto m = locs.matchFirst(rgx.book_index_go_seg)) {
+              markup =
+                munge.url_links("{ " ~ m["link"] ~ " }"
+                ~ mkup.mark_internal_site_lnk ~ m["seg"] ~ ".fnSuffix"
+                ~ "#" ~ m["ocn"] ~ ", ");
+            } else {
+              writeln(__LINE__, ": ", locs);
+            }
+            return markup;
+          }
+          auto bkidx_lnk_scroll(string locs) {
+            string markup = "";
+            if (auto m = locs.matchFirst(rgx.book_index_go)) {
+              markup =
+                munge.url_links("{ " ~ m["link"] ~ " }"
+                ~ mkup.mark_internal_site_lnk
+                ~ "#" ~ m["ocn"] ~ ", ");
+            } else {
+              writeln(__LINE__, ": ", locs);
+            }
+            return markup;
+          }
+          foreach (ref_; bookindex_unordered_hashes[mainkey]["_a"]) {
+            bi_tmp_scroll ~= bkidx_lnk_scroll(ref_);
+            bi_tmp_seg ~= bkidx_lnk_seg(ref_);
+          }
+          bi_tmp_scroll ~= " \\\\\n    ";
+          bi_tmp_seg ~= " \\\\\n    ";
+          bookindex_unordered_hashes[mainkey].remove("_a");
+          auto subkeys =
+            bookindex_unordered_hashes[mainkey].byKey.array.sort().release;
+          foreach (subkey; subkeys) {
+            bi_tmp_scroll ~= subkey ~ ", ";
+            buffer.clear();
+            bi_tmp_tags ~= translate(subkey, transTable);
+            bi_tmp_seg ~= subkey ~ ", ";
+            foreach (ref_; bookindex_unordered_hashes[mainkey][subkey]) {
+              bi_tmp_scroll ~= bkidx_lnk_scroll(ref_);
+              bi_tmp_seg ~= bkidx_lnk_seg(ref_);
+            }
+            bi_tmp_scroll ~= " \\\\\n    ";
+            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.use                   = "backmatter";
+          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                   = obj_cite_number;
+          comp_obj_para.obj_cite_number       = (obj_cite_number==0) ? "" : to!string(obj_cite_number);
+          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;
+          ++obj_cite_number;
+          ++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_.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_;
+      }
+      auto t = tuple(bookindex_section, obj_cite_number);
+      return t;
+    }
+  }
+  /+ +/
+  struct NotesSection {
+    string[string] object_notes;
+    int previous_count;
+    int mkn;
+    auto rgx = Rgx();
+    private auto gather_notes_for_endnote_section(
+      ObjGenericComposite[] contents_am,
+      string                segment_anchor_tag_that_object_belongs_to,
+      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(cntr >= previous_count);
+      previous_count=cntr;
+      assert(
+        (contents_am[cntr].text).match(
+        rgx.inline_notes_delimiter_al_regular_number_note)
+      );
+    }
+    body {
+      mixin InternalMarkup;
+      auto mkup = InlineMarkup();
+      auto munge = ObjInlineMarkupMunge();
+      foreach(
+        m;
+        (contents_am[cntr].text).matchAll(
+          rgx.inline_notes_delimiter_al_regular_number_note
+        )
+      ) {
+        debug(endnotes_build) {
+          writeln(
+            "{^{", m.captures[1], ".}^}"
+            ~ mkup.mark_internal_site_lnk,
+            segment_anchor_tag_that_object_belongs_to,
+              ".fnSuffix#noteref_\n  ", m.captures[1], " ",
+            m.captures[2]); // sometimes need segment name (segmented html & epub)
+        }
+        // TODO NEXT you need anchor for segments at this point ->
+        object_notes["anchor"] ~= "note_" ~ m.captures[1] ~ "』";
+        object_notes["notes"] ~= (segment_anchor_tag_that_object_belongs_to.empty)
+        ? (munge.url_links(
+            "{^{" ~ m.captures[1] ~ ".}^}#noteref_"
+            ~ m.captures[1]) ~ " "
+            ~ m.captures[2] ~ "』"
+          )
+        : (munge.url_links(
+            "{^{" ~ m.captures[1] ~ ".}^}"
+             ~ mkup.mark_internal_site_lnk
+             ~ segment_anchor_tag_that_object_belongs_to
+             ~ ".fnSuffix#noteref_"
+             ~ m.captures[1]) ~ " "
+             ~ m.captures[2] ~ "』"
+          );
+      }
+      return object_notes;
+    }
+    private auto gathered_notes()
+    in {
+    }
+    body {
+      string[][string] endnotes_;
+      if (object_notes.length > 1) {
+        endnotes_["notes"] = (object_notes["notes"].split(rgx.break_string))[0..$-1];
+        endnotes_["anchor"] = (object_notes["anchor"].split(rgx.break_string))[0..$-1];
+      } else {
+        endnotes_["notes"] = [];
+        endnotes_["anchor"] = [];
+      }
+      return endnotes_;
+    }
+    private auto endnote_objects(
+      int            obj_cite_number,
+      bool[string]   opt_action,
+    )
+    in {
+    }
+    body {
+      mixin SiSUnode;
+      ObjGenericComposite[] the_endnotes_section;
+      auto endnotes_ = gathered_notes();
+      string type_is;
+      string lev, lev_markup_number, lev_collapsed_number;
+      string attrib;
+      int[string] indent;
+      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_.use                   = "backmatter";
+        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_.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_;
+        ++obj_cite_number;
+        ++mkn;
+        comp_obj_heading_                       = comp_obj_heading_.init;
+        comp_obj_heading_.use                   = "backmatter";
+        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_.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_;
+        ++obj_cite_number;
+        ++mkn;
+      } else {
+        comp_obj_heading_                       = comp_obj_heading_.init;
+        comp_obj_heading_.use                   = "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_.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_;
+      }
+      if (opt_action["backmatter"] && opt_action["section_endnotes"]) {
+        ObjGenericComposite comp_obj_endnote_;
+        comp_obj_endnote_                       = comp_obj_endnote_.init;
+        comp_obj_endnote_.use                   = "backmatter";
+        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_endnote_.indent_hang           = 0;
+        comp_obj_endnote_.indent_base           = 0;
+        comp_obj_endnote_.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_.text                = endnote.strip;
+          the_endnotes_section                  ~= comp_obj_endnote_;
+        }
+      }
+      auto t = tuple(the_endnotes_section, obj_cite_number);
+      return t;
+    }
+  }
+  /+ +/
+  struct Bibliography {
+    public JSONValue[] _bibliography_(Bi,BJ)(
+      return ref Bi biblio_unsorted_incomplete,
+      return ref BJ bib_arr_json
+    )
+    in {
+      debug(asserts) {
+        static assert(is(typeof(biblio_unsorted_incomplete) == string[]));
+        static assert(is(typeof(bib_arr_json)               == JSONValue[]));
+      }
+   }
+    body {
+      JSONValue[] biblio_unsorted =
+        _biblio_unsorted_complete_(biblio_unsorted_incomplete, bib_arr_json);
+      biblio_arr_json = [];
+      biblio_unsorted_incomplete = [];
+      JSONValue[] biblio_sorted__ = biblio_sort(biblio_unsorted);
+      biblio_debug(biblio_sorted__);
+      debug(biblio0) {
+        writeln("---");
+        writeln("unsorted incomplete: ", biblio_unsorted_incomplete.length);
+        writeln("json:                ", bib_arr_json.length);
+        writeln("unsorted:            ", biblio_unsorted.length);
+        writeln("sorted:              ", biblio_sorted__.length);
+        int cntr;
+        int[7] x;
+        while (cntr < x.length) {
+          writeln(cntr, ": ", biblio_sorted__[cntr]["fulltitle"]);
+          cntr++;
+        }
+      }
+      return biblio_sorted__;
+    }
+    final private JSONValue[] _biblio_unsorted_complete_(Bi,BJ)(
+      Bi            biblio_unordered,
+      return ref BJ bib_arr_json
+    ) {
+      debug(asserts) {
+        static assert(is(typeof(biblio_unordered) == string[]));
+        static assert(is(typeof(bib_arr_json)     == JSONValue[]));
+      }
+      foreach (bibent; biblio_unordered) {
+        /+ update bib to include deemed_author, needed for:
+          sort_bibliography_array_by_deemed_author_year_title
+          either: sort on multiple fields, or; create such sort field
+        +/
+        JSONValue j = parseJSON(bibent);
+        if (!empty(j["fulltitle"].str)) {
+          if (!empty(j["author_raw"].str)) {
+            j["deemed_author"]=j["author_arr"][0];
+          } else if (!empty(j["editor_raw"].str)) {
+            j["deemed_author"]=j["editor_arr"][0];
+          }
+          j["sortby_deemed_author_year_title"] = (
+            j["deemed_author"].str ~
+             "; " ~
+             j["year"].str ~
+             "; "  ~
+             j["fulltitle"].str
+          );
+        }
+        bib_arr_json ~= j;
+      }
+      JSONValue[] biblio_unsorted_array_of_json_objects =
+        bib_arr_json.dup;
+        destroy(bib_arr_json);
+      return biblio_unsorted_array_of_json_objects;
+    }
+    final private JSONValue[] biblio_sort(BJ)(BJ biblio_unordered) {
+      debug(asserts) {
+        static assert(is(typeof(biblio_unordered) == JSONValue[]));
+      }
+      JSONValue[] biblio_sorted_;
+      biblio_sorted_ =
+        sort!((a, b){
+          return ((a["sortby_deemed_author_year_title"].str) < (b["sortby_deemed_author_year_title"].str));
+        })(biblio_unordered).array;
+      debug(bibliosorted) {
+        foreach (j; biblio_sorted_) {
+          if (!empty(j["fulltitle"].str)) {
+            writeln(j["sortby_deemed_author_year_title"]);
+          }
+        }
+      }
+      return biblio_sorted_;
+    }
+    void biblio_debug(BJ)(BJ biblio_sorted) {
+      debug(asserts) {
+        static assert(is(typeof(biblio_sorted) == JSONValue[]));
+      }
+      debug(biblio0) {
+        foreach (j; biblio_sorted) {
+          if (!empty(j["fulltitle"].str)) {
+            writeln(j["sortby_deemed_author_year_title"]);
+          }
+        }
+      }
+    }
+  }
+  /+ +/
+  struct NodeStructureMetadata {
+    int lv, lv0, lv1, lv2, lv3, lv4, lv5, lv6, lv7;
+    int obj_cite_number;
+    int[string] p_; // p_ parent_
+    auto rgx = Rgx();
+    ObjGenericComposite node_location_emitter(Lv,Ta,N,C,P,I)(
+      Lv lev_markup_number,
+      Ta segment_anchor_tag,
+      N  obj_cite_number_,
+      C  cntr_,
+      P  ptr_,
+      I  is_
+    )
+    in {
+      debug(asserts) {
+        static assert(is(typeof(lev_markup_number)  == string));
+        static assert(is(typeof(segment_anchor_tag) == string));
+        static assert(is(typeof(obj_cite_number_)   == int));
+        static assert(is(typeof(cntr_)              == int));
+        static assert(is(typeof(ptr_)               == int));
+        static assert(is(typeof(is_)                == string));
+      }
+      assert(is_ != "heading");
+      assert(obj_cite_number_.to!int >= 0);
+    }
+    body {
+      assert(is_ != "heading"); // should not be necessary
+      assert(obj_cite_number_.to!int >= 0); // should not be necessary
+      int obj_cite_number = obj_cite_number_.to!int;
+      if (lv7 > State.off) {
+        p_["lev_markup_number"] = DocStructMarkupHeading.h_text_4;
+        p_["obj_cite_number"] = lv7;
+      } else if (lv6 > State.off) {
+        p_["lev_markup_number"] = DocStructMarkupHeading.h_text_3;
+        p_["obj_cite_number"] = lv6;
+      } else if (lv5 > State.off) {
+        p_["lev_markup_number"] = DocStructMarkupHeading.h_text_2;
+        p_["obj_cite_number"] = lv5;
+      } else {
+        p_["lev_markup_number"] = DocStructMarkupHeading.h_text_1;
+        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_number_;
+      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"];
+      debug(node) {
+        if (lev_markup_number.match(rgx.levels_numbered_headings)) {
+          writeln("x ", _node.to!string);
+        } else {
+          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);
+      return comp_obj_location;
+    }
+    invariant() {
+    }
+    ObjGenericComposite node_emitter_heading(T,L,Lm,Lc,Ta,N,C,P,LA,I,PSn,fNr,fNs,fL)(
+      T   _text,
+      L   lev,
+      Lm  lev_markup_number,
+      Lc  lev_collapsed_number,
+      Ta  segment_anchor_tag,
+      N   obj_cite_number_,
+      C   cntr_,
+      P   ptr_,
+      LA  lv_ancestors_txt,
+      I   is_,
+      PSn html_segnames_ptr,
+      fNr flag_notes_reg,
+      fNs flag_notes_star,
+      fL  flag_links,
+    )
+    in {
+      debug(asserts) {
+        static assert(is(typeof(_text)                == string));
+        static assert(is(typeof(lev)                  == string));
+        static assert(is(typeof(lev_markup_number)    == string));
+        static assert(is(typeof(lev_collapsed_number) == string));
+        static assert(is(typeof(segment_anchor_tag)   == string));
+        static assert(is(typeof(obj_cite_number_)     == int));
+        static assert(is(typeof(cntr_)                == int));
+        static assert(is(typeof(ptr_)                 == int));
+        static assert(is(typeof(lv_ancestors_txt)     == string[]));
+        static assert(is(typeof(is_)                  == string));
+        static assert(is(typeof(html_segnames_ptr)    == int));
+      }
+      assert(is_ == "heading");
+      assert(to!int(obj_cite_number_) >= 0);
+      assert(
+        lev_markup_number.match(rgx.levels_numbered),
+        ("not a valid heading level: " ~ lev_markup_number ~ " at " ~ obj_cite_number_.to!string)
+      );
+      if (lev_markup_number.match(rgx.levels_numbered)) {
+        if (lev_markup_number.to!int == 0) {
+          assert(obj_cite_number_.to!int == 1);
+        }
+      }
+    }
+    body {
+      int obj_cite_number = obj_cite_number_.to!int;
+      switch (lev_markup_number.to!int) {
+      case 0:
+        lv = DocStructMarkupHeading.h_sect_A;
+        lv0 = obj_cite_number;
+        lv1=0; lv2=0; lv3=0; lv4=0; lv5=0; lv6=0; lv7=0;
+        p_["lev_markup_number"] = 0;
+        p_["obj_cite_number"] = 0;
+        break;
+      case 1:
+        lv = DocStructMarkupHeading.h_sect_B;
+        lv1 = obj_cite_number;
+        lv2=0; lv3=0; lv4=0; lv5=0; lv6=0; lv7=0;
+        p_["lev_markup_number"] =
+          DocStructMarkupHeading.h_sect_A;
+        p_["obj_cite_number"] = lv0;
+        break;
+      case 2:
+        lv = DocStructMarkupHeading.h_sect_C;
+        lv2 = obj_cite_number;
+        lv3=0; lv4=0; lv5=0; lv6=0; lv7=0;
+        p_["lev_markup_number"] =
+          DocStructMarkupHeading.h_sect_B;
+        p_["obj_cite_number"] = lv1;
+        break;
+      case 3:
+        lv = DocStructMarkupHeading.h_sect_D;
+        lv3=obj_cite_number;
+        lv4=0; lv5=0; lv6=0; lv7=0;
+        p_["lev_markup_number"] =
+          DocStructMarkupHeading.h_sect_C;
+        p_["obj_cite_number"] = lv2;
+        break;
+      case 4:
+        lv = DocStructMarkupHeading.h_text_1;
+        lv4 = obj_cite_number;
+        lv5=0; lv6=0; lv7=0;
+        if (lv3 > State.off) {
+          p_["lev_markup_number"] =
+            DocStructMarkupHeading.h_sect_D;
+          p_["obj_cite_number"] = lv3;
+        } else if (lv2 > State.off) {
+          p_["lev_markup_number"] =
+            DocStructMarkupHeading.h_sect_C;
+          p_["obj_cite_number"] = lv2;
+        } else if (lv1 > State.off) {
+          p_["lev_markup_number"] =
+            DocStructMarkupHeading.h_sect_B;
+          p_["obj_cite_number"] = lv1;
+        } else {
+          p_["lev_markup_number"] =
+            DocStructMarkupHeading.h_sect_A;
+          p_["obj_cite_number"] = lv0;
+        }
+        break;
+      case 5:
+        lv = DocStructMarkupHeading.h_text_2;
+        lv5 = obj_cite_number;
+        lv6=0; lv7=0;
+        p_["lev_markup_number"] =
+          DocStructMarkupHeading.h_text_1;
+        p_["obj_cite_number"] = lv4;
+        break;
+      case 6:
+        lv = DocStructMarkupHeading.h_text_3;
+        lv6 = obj_cite_number;
+        lv7=0;
+        p_["lev_markup_number"] =
+          DocStructMarkupHeading.h_text_2;
+        p_["obj_cite_number"] = lv5;
+        break;
+      case 7:
+        lv = DocStructMarkupHeading.h_text_4;
+        lv7 = obj_cite_number;
+        p_["lev_markup_number"] =
+          DocStructMarkupHeading.h_text_3;
+        p_["obj_cite_number"] = lv6;
+        break;
+      default:
+        break;
+      }
+      ObjGenericComposite _comp_obj_heading_;
+      _comp_obj_heading_                           = _comp_obj_heading_.init;
+      _comp_obj_heading_.use                       = "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_number_;
+      _comp_obj_heading_.obj_cite_number           = (obj_cite_number==0) ? "" : obj_cite_number.to!string;
+      _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;
+      debug(node) {
+        if (lev_markup_number.match(rgx.levels_numbered_headings)) {
+          writeln("* ", _node.to!string);
+        }
+      }
+      debug(nodeheading) {
+        if (lev_markup_number.match(rgx.levels_numbered_headings)) {
+          writeln("* ", _node.to!string);
+        }
+      }
+      assert(_comp_obj_heading_.parent_lev_markup <= 7);
+      assert(_comp_obj_heading_.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);
+          }
+        }
+        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) {
+        }
+      }
+      return _comp_obj_heading_;
+    }
+    invariant() {
+    }
+  }
+  /+ abstraction functions emitters ↑ +/
+  /+ ↓ abstraction functions assertions +/
+  auto assertions_doc_structure(O,Lv)(
+    O  an_object,
+    Lv lv
+  ) {
+    debug(asserts) {
+      static assert(is(typeof(an_object) == string[string]));
+      static assert(is(typeof(lv)        == int[string]));
+    }
+    if (lv["h3"] > State.off) {
+      assert(lv["h0"] > State.off);
+      assert(lv["h1"] > State.off);
+      assert(lv["h2"] > State.off);
+    } else if (lv["h2"] > State.off) {
+      assert(lv["h0"] > State.off);
+      assert(lv["h1"] > State.off);
+      assert(lv["h3"] == State.off);
+    } else if (lv["h1"] > State.off) {
+      assert(lv["h0"] > State.off);
+      assert(lv["h2"] == State.off);
+      assert(lv["h3"] == State.off);
+    } else if (lv["h0"] > State.off) {
+      assert(lv["h1"] == State.off);
+      assert(lv["h2"] == State.off);
+      assert(lv["h3"] == State.off);
+    } else {
+      assert(lv["h0"] == State.off);
+      assert(lv["h1"] == State.off);
+      assert(lv["h2"] == State.off);
+      assert(lv["h3"] == State.off);
+    }
+    if (lv["h7"] > State.off) {
+      assert(lv["h4"] > State.off);
+      assert(lv["h5"] > State.off);
+      assert(lv["h6"] > State.off);
+    } else if (lv["h6"] > State.off) {
+      assert(lv["h4"] > State.off);
+      assert(lv["h5"] > State.off);
+      assert(lv["h7"] == State.off);
+    } else if (lv["h5"] > State.off) {
+      assert(lv["h4"] > State.off);
+      assert(lv["h6"] == State.off);
+      assert(lv["h7"] == State.off);
+    } else if (lv["h4"] > State.off) {
+      assert(lv["h5"] == State.off);
+      assert(lv["h6"] == State.off);
+      assert(lv["h7"] == State.off);
+    } else {
+      assert(lv["h4"] == State.off);
+      assert(lv["h5"] == State.off);
+      assert(lv["h6"] == State.off);
+      assert(lv["h7"] == State.off);
+    }
+    if (lv["h0"] == State.off) {
+      assert(lv["h1"] == State.off);
+      assert(lv["h2"] == State.off);
+      assert(lv["h3"] == State.off);
+      assert(lv["h4"] == State.off);
+      assert(lv["h5"] == State.off);
+      assert(lv["h6"] == State.off);
+      assert(lv["h7"] == State.off);
+    }
+    if (lv["h1"] == State.off) {
+      assert(lv["h2"] == State.off);
+      assert(lv["h3"] == State.off);
+    }
+    if (lv["h2"] == State.off) {
+      assert(lv["h3"] == State.off);
+    }
+    if (lv["h3"] == State.off) {
+    }
+    if (lv["h4"] == State.off) {
+      assert(lv["h5"] == State.off);
+      assert(lv["h6"] == State.off);
+      assert(lv["h7"] == State.off);
+    }
+    if (lv["h5"] == State.off) {
+      assert(lv["h6"] == State.off);
+      assert(lv["h7"] == State.off);
+    }
+    if (lv["h6"] == State.off) {
+      assert(lv["h7"] == State.off);
+    }
+    if (lv["h7"] == State.off) {
+    }
+    switch ((an_object["lev"]).to!string) {
+    case "A":
+      if (lv["h0"] == State.off) {
+        assert(lv["h1"] == State.off);
+        assert(lv["h2"] == State.off);
+        assert(lv["h3"] == State.off);
+        assert(lv["h4"] == State.off);
+        assert(lv["h5"] == State.off);
+        assert(lv["h6"] == State.off);
+        assert(lv["h7"] == State.off);
+      } else {                       // (lv["h0"] > State.off)
+        assert(lv["h0"] == State.off,"error should not enter level A a second time");
+      }
+      break;
+    case "B":
+      if (lv["h1"] == State.off) {
+        assert(lv["h0"] > State.off);
+        assert(lv["h2"] == State.off);
+        assert(lv["h3"] == State.off);
+      } else {                       // (lv["h1"] > State.off)
+        assert(lv["h0"] > State.off);
+        assert(lv["h1"] > State.off);
+      }
+      break;
+    case "C":
+      if (lv["h2"] == State.off) {
+        assert(lv["h0"] > State.off);
+        assert(lv["h1"] > State.off);
+        assert(lv["h3"] == State.off);
+      } else {                       // (lv["h2"] > State.off)
+        assert(lv["h0"] > State.off);
+        assert(lv["h1"] > State.off);
+        assert(lv["h2"] > State.off);
+      }
+      break;
+    case "D":
+      if (lv["h3"] == State.off) {
+        assert(lv["h0"] > State.off);
+        assert(lv["h1"] > State.off);
+        assert(lv["h2"] > State.off);
+      } else {                      // (lv["h3"] > State.off)
+        assert(lv["h0"] > State.off);
+        assert(lv["h1"] > State.off);
+        assert(lv["h2"] > State.off);
+        assert(lv["h3"] > State.off);
+      }
+      break;
+    case "1":
+      if (lv["h4"] == State.off) {
+        assert(lv["h0"] > State.off);
+      } else {                      // (lv["h4"] > State.off)
+        assert(lv["h0"] > State.off);
+        assert(lv["h4"] > State.off);
+      }
+      break;
+    case "2":
+      if (lv["h5"] == State.off) {
+        assert(lv["h0"] > State.off);
+        assert(lv["h4"] > State.off);
+      } else {                      // (lv["h5"] > State.off)
+        assert(lv["h0"] > State.off);
+        assert(lv["h4"] > State.off);
+        assert(lv["h5"] > State.off);
+      }
+      break;
+    case "3":
+      if (lv["h6"] == State.off) {
+        assert(lv["h0"] > State.off);
+        assert(lv["h4"] > State.off);
+        assert(lv["h5"] > State.off);
+      } else {                      // (lv["h6"] > State.off)
+        assert(lv["h0"] > State.off);
+        assert(lv["h4"] > State.off);
+        assert(lv["h5"] > State.off);
+        assert(lv["h6"] > State.off);
+      }
+      break;
+    case "4":
+      if (lv["h7"] == State.off) {
+        assert(lv["h0"] > State.off);
+        assert(lv["h4"] > State.off);
+        assert(lv["h5"] > State.off);
+        assert(lv["h6"] > State.off);
+      } else {                      // (lv["h7"] > State.off)
+        assert(lv["h0"] > State.off);
+        assert(lv["h4"] > State.off);
+        assert(lv["h5"] > State.off);
+        assert(lv["h6"] > State.off);
+        assert(lv["h7"] > State.off);
+      }
+      break;
+    default:
+      break;
+    }
+  }
+  auto assertions_flag_types_block_status_none_or_closed(T)(T type) {
+    debug(asserts) {
+      static assert(is(typeof(type) == int[string]));
+    }
+    assert(
+      (type["code"] == TriState.off)
+      || (type["code"] == TriState.closing),
+      "code block status: off or closing");
+    assert(
+      (type["poem"] == TriState.off)
+      || (type["poem"] == TriState.closing),
+      "poem status: off or closing");
+    assert(
+      (type["table"] == TriState.off)
+      || (type["table"] == TriState.closing),
+      "table status: off or closing");
+    assert(
+      (type["group"] == TriState.off)
+      || (type["group"] == TriState.closing),
+      "group block status: off or closing");
+    assert(
+      (type["block"] == TriState.off)
+      || (type["block"] == TriState.closing),
+      "block status: off or closing");
+  }
+  /+ abstraction functions assertions ↑ +/
+} /+ ← closed: template SiSUdocAbstraction +/
+template docSectKeysSeq() {
+  auto docSectKeysSeq(string[][string] document_section_keys_sequenced) {
+    struct doc_sect_keys_seq {
+      auto seg() {
+        return document_section_keys_sequenced["seg"];
+      }
+      auto scroll() {
+        return document_section_keys_sequenced["scroll"];
+      }
+      auto sql() {
+        return document_section_keys_sequenced["sql"];
+      }
+    }
+    return doc_sect_keys_seq();
+  }
+}