1 files changed, 21 insertions, 0 deletions
diff --git a/src/sisudoc/ocda/meta/metadoc_from_src_functions.d b/src/sisudoc/ocda/meta/metadoc_from_src_functions.d
index 08ee22c..0deeb72 100644
--- a/src/sisudoc/ocda/meta/metadoc_from_src_functions.d
+++ b/src/sisudoc/ocda/meta/metadoc_from_src_functions.d
@@ -67,6 +67,27 @@ template docAbstractionFunctions() {
   string anchor_tag_;
   string[string] tag_in_seg;
   bool[string] _heading_anchor_tags_seen;
+  /+ ↓ the segment names spine makes for itself, which a heading in the
+       document may not also claim.
+       .
+       A document that writes "1~endnotes Endnote" asks for the name spine
+       gives the gathered endnotes. Both then wrote into endnotes.xhtml,
+       and the navigation listed that file twice, the second time behind
+       its own previous entry in reading order. Seeding the seen set with
+       these names means the document's heading is disambiguated the same
+       way a repeated anchor tag is, and the generated section keeps the
+       name that the table of contents links to.
+  +/
+  bool[string] _reserved_heading_anchor_tags() {
+    bool[string] _reserved;
+    foreach (_name; [
+      "toc", "endnotes", "glossary", "bibliography", "bookindex", "blurb",
+      "_the_title",
+    ]) {
+      _reserved[_name] = true;
+    }
+    return _reserved;
+  }
   string lev_anchor_tag;
   string[string][string] tag_assoc;
   string[] lv0to3_tags;