org, ocda (ongoing) split file, separate functions

1 files changed, 28 insertions, 5549 deletions

diff --git a/org/ocda.org b/org/ocda.org
index ca0e928..3a671ca 100644
--- a/org/ocda.org
+++ b/org/ocda.org
@@ -41,10 +41,6 @@ template docAbstraction() {
   ) {
     <<docAbstraction>>
   } // ← closed: abstract doc source
-  <<docAbstractionRelatedFunctions>>
-}
-template docSectKeysSeq() {
-  <<docSectKeysSeq>>
 }
 #+END_SRC
 
@@ -66,227 +62,12 @@ import
   doc_reform.meta.rgx,
   doc_reform.meta.metadoc_object_setter,
   doc_reform.meta.rgx;
-// ↓ abstraction mixins
-mixin ObjectSetter;
-mixin InternalMarkup;
-mixin spineRgxIn;
-// initialize
-ObjGenericComposite[] the_document_toc_section, the_document_head_section, the_document_body_section, the_document_endnotes_section, the_document_bibliography_section, the_document_bookindex_section, the_document_glossary_section, the_document_blurb_section, the_document_xml_dom_tail_section;
-struct _theDoc {
-  ObjGenericComposite[] toc;
-  ObjGenericComposite[] head;
-  ObjGenericComposite[] body;
-  ObjGenericComposite[] bibliography;
-  ObjGenericComposite[] glossary;
-  ObjGenericComposite[] bookindex;
-  ObjGenericComposite[] blurb;
-  ObjGenericComposite[] endnotes;
-}
-string[string] an_object, processing, object_notes;
-string an_object_key;
-string[] anchor_tags;
-string anchor_tag;
-string anchor_tag_;
-string[string] tag_in_seg;
-string lev_anchor_tag;
-string[string][string] tag_assoc;
-string[] lv0to3_tags;
-// enum
-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
-enum Status { off, on, }
-enum OCNtype { ocn, non, bkidx, }
-// 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";
-static auto obj_im = ObjInlineMarkup();
-static auto obj_att = ObjAttributes();
-// ocn
-struct OCNset {
-  int digit;
-  int object_number;
-  bool off;
-  string identifier;
-  int bkidx;
-  int type;
-}
-OCNset obj_cite_digits;
-int obj_cite_digit_, obj_cite_digit_off, obj_cite_digit_bkidx, obj_cite_digit_type;
-auto object_citation_number = OCNemitter();
-struct ST_endnotes {
-  ObjGenericComposite[] endnotes;
-  OCNset                ocn;
-}
-struct ST_bookindex {
-  ObjGenericComposite[] bookindex;
-  OCNset                ocn;
-}
-struct ST_biblio_section {
-  ObjGenericComposite[]  bibliography_section;
-  string[string][string] tag_assoc;
-}
-int[] dom_structure_markedup_tags_status         = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
-int[] dom_structure_markedup_tags_status_buffer  = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
-int[] dom_structure_collapsed_tags_status        = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
-int[] dom_structure_collapsed_tags_status_buffer = [ 0, 0, 0, 0, 0, 0, 0, 0, 0,];
-struct ST_ancestors {
-  ObjGenericComposite[] the_document_body_section;
-  ObjGenericComposite[] the_document_endnotes_section;
-  ObjGenericComposite[] the_document_glossary_section;
-  ObjGenericComposite[] the_document_bibliography_section;
-  ObjGenericComposite[] the_document_bookindex_section;
-  ObjGenericComposite[] the_document_blurb_section;
-}
-struct ST_segnames {
-  string[][string]      segnames;
-  int                   html_segnames_ptr_cntr;
-  int                   html_segnames_ptr;
-}
-struct  ST_txtPlusHasFootnotes {
-  string           obj_txt;
-  bool             has_notes_reg;
-  bool             has_notes_star;
-  bool             has_notes_plus;
-}
-struct ST_txtPlusHasFootnotesUrlsImages {
-  string           obj_txt;
-  bool             has_notes_reg;
-  bool             has_notes_star;
-  bool             has_notes_plus;
-  bool             has_urls;
-  bool             has_images_without_dimensions;
-}
-struct ST_txtAndAnchorTagPlusHasFootnotesUrlsImages {
-  string           obj_txt;
-  string           anchor_tag;
-  bool             has_notes_reg;
-  bool             has_notes_star;
-  bool             has_notes_plus;
-  bool             has_links; // use same name
-  bool             has_images_without_dimensions;
-}
-struct ST_the_section {
-  ObjGenericComposite[]  comp_section_obj; // array: the heading has 2 members inserted, paras just 1
-  uint[string]           pith;
-  string[string][string] tag_assoc;        // only for headings: html & epub
-}
-enum DomTags { none, open, close, close_and_open, open_still, }
-// book index variables
-string book_idx_tmp;
-string[][string][string] bookindex_unordered_hashes;
-// node
-ObjGenericComposite comp_obj_, comp_obj_location, comp_obj_poem_ocn, comp_obj_comment;
-auto node_construct = NodeStructureMetadata();
-struct ST_txt_by_line_common_reset {
-  int[string]     line_occur;
-  string[string]  this_object;
-  uint[string]    pith;
-}
-struct ST_txt_by_line_block_start {
-  uint[string]    pith;
-  uint[string]    dochas;
-  string[string]  object_number_poem;
-}
-struct ST_txt_by_line_block_generic {
-  uint[string]    pith;
-  string[string]  this_object;
-}
-struct ST_txt_by_line_block_poem {
-  int             cntr;
-  uint[string]    pith;
-  string[string]  this_object;
-}
-struct ST_txt_by_line_block_biblio {
-  uint[string]    pith;
-  int             bib_entry;
-  string          biblio_entry_str_json;
-  string[]        biblio_arr_json;
-}
-struct ST_flow_book_index {
-  string[string]  this_object;
-  uint[string]    pith;
-  string          book_idx_tmp;
-}
-struct ST_flow_heading_found {
-  string[string]       heading_match_str;
-  Regex!(char)[string] heading_match_rgx;
-  uint[string]         pith;
-}
-struct ST_flow_heading_make_set {
-  char[]          line;
-  uint[string]    pith;
-  string[string]  this_object;
-}
-struct ST_flow_para_match {
-  uint[string]    pith;
-  string[string]  this_object;
-  string          this_object_key;
-  int[string]     indent;
-  bool            bullet;
-  int[string]     line_occur;
-}
-struct ST_flow_table_array_munge {
-  ObjGenericComposite table_object;
-  string[][]          table_array;
-}
-struct ST_flow_table_of_contents_gather_headings {
-  ObjGenericComposite[] the_document_toc_section;
-  string[][string]      lev4_subtoc;
-}
-struct ST_flow_bibliography {
-  JSONValue[] biblio_sorted;
-  JSONValue[] bib_arr_json;
-  string[]    biblio_unsorted_incomplete;
-}
-struct ST_flow_table_closed_make_special_notation_table {
-  string[string]        this_object;
-  ObjGenericComposite[] the_document_body_section;
-  OCNset                obj_cite_digits;
-  ObjGenericComposite   comp_obj_;
-  int                   cntr;
-  uint[string]          pith;
-}
-struct ST_flow_block_flag_line_empty {
-  string[string]           this_object;
-  ObjGenericComposite[]    the_document_body_section;
-  string[][string][string] bookindex_unordered_hashes;
-  OCNset                   obj_cite_digits;
-  ObjGenericComposite      comp_obj_;
-  int                      cntr;
-  uint[string]             pith;
-}
-struct ST_flow_table_substantive_munge {
-  ObjGenericComposite  table_object;
-  string               table_substantive;
-}
+public import doc_reform.meta.metadoc_from_src_functions;
+mixin docAbstractionFunctions;
 #+END_SRC
 
 ** docAbstraction
-*** toc
+*** abstraction summary
 
 #+NAME: docAbstraction
 #+HEADER: :noweb yes
@@ -441,7 +222,6 @@ int cnt1 = 1; int cnt2 = 1; int cnt3 = 1;
 #+NAME: docAbstractionInitSubstitutions
 #+HEADER: :noweb yes
 #+BEGIN_SRC d
-enum Substitute { match, markup, }
 debug (substitutions) {
   writeln(__LINE__, ":", __FILE__, ": DEBUG substitutions:");
   if (!(conf_make_meta.make.headings.empty)) {
@@ -478,14 +258,6 @@ auto loopMarkupSrcByLine(
   string[string]   an_object,
   uint[string]     pith,
 ) {
-  struct _loopMarkupSrcByLineStruct {
-    ObjGenericComposite[] toc;
-    ObjGenericComposite[] body;
-    ObjGenericComposite[] glossary;
-    ObjGenericComposite[] blurb;
-    string[string]        object_notes;
-    string[][string]      segnames;
-  }
   _loopMarkupSrcByLineStruct ret;
   srcDocLoopLineByLine_:
   foreach (line; markup_sourcefile_content) {
@@ -556,7 +328,7 @@ auto loopMarkupSrcByLine(
         debug(glossary) { writeln(__LINE__); writeln(line); }
         pith["section"] = eN.sect.glossary;
         if (opt_action.backmatter && opt_action.section_glossary) {
-          ST_the_section add_to_glossary_sect = line.build_the_glossary_section(pith, tag_assoc);
+          ST_the_section add_to_glossary_sect = line.build_the_glossary_section(pith, tag_assoc); // double check, should not be necessary to pass pith
           the_document_glossary_section ~= add_to_glossary_sect.comp_section_obj[0];
           if (add_to_glossary_sect.comp_section_obj.length > 1) { // heading
             the_document_glossary_section ~= add_to_glossary_sect.comp_section_obj[1];
@@ -575,7 +347,7 @@ auto loopMarkupSrcByLine(
         pith["section"] = eN.sect.blurb;
         debug(blurb) { writeln(__LINE__); writeln(line); }
         if ((opt_action.backmatter && opt_action.section_blurb) && !(line.empty)) {
-          ST_the_section add_to_blurb_sect = line.build_the_blurb_section(pith, tag_assoc, opt_action);
+          ST_the_section add_to_blurb_sect = line.build_the_blurb_section(pith, tag_assoc, opt_action); // double check, should not be necessary to pass pith
           the_document_blurb_section ~= add_to_blurb_sect.comp_section_obj[0];
           if (add_to_blurb_sect.comp_section_obj.length > 1) { // heading
             the_document_blurb_section ~= add_to_blurb_sect.comp_section_obj[1];
@@ -1114,55 +886,6 @@ auto loopMarkupSrcByLine(
 #+NAME: docAbstractionPostMainLoop
 #+HEADER: :noweb yes
 #+BEGIN_SRC d
-<<docAbstractionRelatedFunctionsBackMatter>>
-<<docAbstractionRelatedFunctionsEndnotes>>
-<<docAbstractionRelatedFunctionsGlossary>>
-<<docAbstractionRelatedFunctionsBibliography>>
-<<docAbstractionRelatedFunctionsBookIndex>>
-<<docAbstractionRelatedFunctionsBlurb>>
-<<docAbstractionRelatedFunctionsTOCgather>>
-<<docAbstractionDocHeadAndBody>>
-<<docAbstractionAncestors>>
-<<docAbstractionSegNames>>
-<<docAbstractionSegNamesLinkedAndImages>>
-<<docAbstractionEndnotes>>
-<<docAbstractionGlossary>>
-<<docAbstractionBibliography>>
-<<docAbstractionBookIndex>>
-<<docAbstractionBlurb>>
-<<docAbstractionGetDecendants>>
-<<docAbstractionHeadingCloseOpenTags>>
-// the_dom_tail_section                      ~= comp_obj_; // remove tail for now, decide on later
-<<docAbstractionTheDoc>>
-<<docAbstractionDocReInit>>
-<<docAbstractionDocHasParts>>
-#+END_SRC
-
-*** return structure
-
-#+NAME: docAbstractionReturnsStruct
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
-// the doc to be returned
-struct ST_docAbstraction {
-  ObjGenericComposite[][string] document_the;
-  DocHas_                       doc_has;
-}
-ST_docAbstraction ret;
-{
-  ret.document_the = document_the;
-  ret.doc_has      = doc_has;
-}
-return ret;
-#+END_SRC
-
-** docAbstraction Functions (post loop)
-*** Back Matter (added after end of document loop)
-**** Back Matter
-
-#+NAME: docAbstractionRelatedFunctionsBackMatter
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 { // EOF  backMatter
   comp_obj_                                              = set_object_heading("lev1", "backmatter", "tail", "");
   comp_obj_.metainfo.identifier                          = "";
@@ -1179,13 +902,6 @@ return ret;
   tag_assoc[comp_obj_.tags.anchor_tag_html]["seg_lv4"]            = comp_obj_.tags.in_segment_html;
   tag_assoc[comp_obj_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = comp_obj_.tags.segment_anchor_tag_epub;
 }
-#+END_SRC
-
-**** Endnotes function (add gathered endnotes)
-
-#+NAME: docAbstractionRelatedFunctionsEndnotes
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 // endNotes
 ST_endnotes en_st = note_section.backmatter_endnote_objects(obj_cite_digits, opt_action);
 { // endnotes
@@ -1196,13 +912,6 @@ ST_endnotes en_st = note_section.backmatter_endnote_objects(obj_cite_digits, opt
     foreach (o; the_document_endnotes_section) { writeln(o); }
   }
 }
-#+END_SRC
-
-**** Glossary function
-
-#+NAME: docAbstractionRelatedFunctionsGlossary
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 { // glossary
   if (an_object["glossary_nugget"].length == 0) {
     comp_obj_                                   = set_object_heading("lev1", "empty", "empty", "(skip) there is no Glossary section");
@@ -1214,26 +923,12 @@ ST_endnotes en_st = note_section.backmatter_endnote_objects(obj_cite_digits, opt
   }
   debug(glossary) { foreach (gloss; the_document_glossary_section) { writeln(gloss.text); } }
 }
-#+END_SRC
-
-**** Bibliography function
-
-#+NAME: docAbstractionRelatedFunctionsBibliography
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 { // bibliography
   string[] biblio_unsorted_incomplete = biblio_arr_json.dup;
   ST_biblio_section biblio_section    = backmatter_make_the_bibliography_section(biblio_unsorted_incomplete, bib_arr_json);
   the_document_bibliography_section   = biblio_section.bibliography_section;
   tag_assoc                           = biblio_section.tag_assoc;
 }
-#+END_SRC
-
-**** Book Index function
-
-#+NAME: docAbstractionRelatedFunctionsBookIndex
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 { // bookindex
   BookIndexReportSection bi = BookIndexReportSection();
   ST_bookindex bi_st
@@ -1243,13 +938,6 @@ ST_endnotes en_st = note_section.backmatter_endnote_objects(obj_cite_digits, opt
   obj_cite_digits = bi_st.ocn;
   debug(bookindex) { foreach (bi_entry; the_document_bookindex_section) { writeln(bi_entry); } }
 }
-#+END_SRC
-
-**** Blurb function
-
-#+NAME: docAbstractionRelatedFunctionsBlurb
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 { // blurb
   if (an_object["blurb_nugget"].length == 0) {
     comp_obj_                                   = set_object_heading("lev1", "empty", "empty", "(skip) there is no Blurb section");
@@ -1263,35 +951,13 @@ ST_endnotes en_st = note_section.backmatter_endnote_objects(obj_cite_digits, opt
   }
   debug(blurb) { foreach (blurb; the_document_blurb_section) { writeln(blurb.text); } }
 }
-#+END_SRC
-
-**** TOC gather function
-
-#+NAME: docAbstractionRelatedFunctionsTOCgather
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 { // toc gather backmatter
   the_document_toc_section ~= backmatter_gather_table_of_contents(the_document_endnotes_section, the_document_glossary_section, the_document_bibliography_section, the_document_bookindex_section, the_document_blurb_section); //
 }
-#+END_SRC
-
-*** Doc Head and Body
-
-#+NAME: docAbstractionDocHeadAndBody
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 { // document head and body
   the_document_head_section ~= the_document_body_section[0];
   the_document_body_section = the_document_body_section[1..$];
 }
-#+END_SRC
-
-*** Extract
-**** Ancestors
-
-#+NAME: docAbstractionAncestors
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 { // document ancestors
   ST_ancestors get_ancestors;
   get_ancestors = the_document_body_section.after_doc_determine_ancestors(the_document_endnotes_section, the_document_glossary_section, the_document_bibliography_section, the_document_bookindex_section, the_document_blurb_section);
@@ -1302,13 +968,6 @@ ST_endnotes en_st = note_section.backmatter_endnote_objects(obj_cite_digits, opt
   the_document_bookindex_section    = get_ancestors.the_document_bookindex_section;
   the_document_blurb_section        = get_ancestors.the_document_blurb_section;
 }
-#+END_SRC
-
-**** SegNames
-
-#+NAME: docAbstractionSegNames
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 { // document segnames
   ST_segnames get_segnames;
   get_segnames = the_document_body_section.after_doc_determine_segnames(the_document_endnotes_section, the_document_glossary_section, the_document_bibliography_section, the_document_bookindex_section, the_document_blurb_section, segnames, html_segnames_ptr_cntr, html_segnames_ptr); //
@@ -1316,13 +975,6 @@ ST_endnotes en_st = note_section.backmatter_endnote_objects(obj_cite_digits, opt
   html_segnames_ptr_cntr            = get_segnames.html_segnames_ptr_cntr;
   html_segnames_ptr                 = get_segnames.html_segnames_ptr;
 }
-#+END_SRC
-
-**** SegNames with links & images
-
-#+NAME: docAbstractionSegNamesLinkedAndImages
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 // document head
 string[] segnames_0_to_4;
 foreach (ref obj; the_document_head_section) {
@@ -1415,14 +1067,6 @@ if (the_document_body_section.length > 1) {
   }
 }
 auto image_list = (_images.sort()).uniq;
-#+END_SRC
-
-*** Level 1~
-**** Endnotes
-
-#+NAME: docAbstractionEndnotes
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 // endnotes optional only one 1~ level
 if (the_document_endnotes_section.length > 1) {
   dom_structure_markedup_tags_status_buffer           = dom_structure_markedup_tags_status.dup;
@@ -1458,13 +1102,6 @@ if (the_document_endnotes_section.length > 1) {
     obj = _links(obj);
   }
 }
-#+END_SRC
-
-**** Glossary
-
-#+NAME: docAbstractionGlossary
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 // glossary optional only one 1~ level
 if (the_document_glossary_section.length > 1) {
   foreach (ref obj; the_document_glossary_section) {
@@ -1500,13 +1137,6 @@ if (the_document_glossary_section.length > 1) {
     obj = _links(obj);
   }
 }
-#+END_SRC
-
-**** Bibliography
-
-#+NAME: docAbstractionBibliography
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 // bibliography optional only one 1~ level
 if (the_document_bibliography_section.length > 1) {
   foreach (ref obj; the_document_bibliography_section) {
@@ -1542,13 +1172,6 @@ if (the_document_bibliography_section.length > 1) {
     obj = _links(obj);
   }
 }
-#+END_SRC
-
-**** Book Index
-
-#+NAME: docAbstractionBookIndex
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 // book index, optional only one 1~ level
 int ocn_       = obj_cite_digits.object_number;
 int ocn_bkidx_ = 0;
@@ -1595,13 +1218,6 @@ if (the_document_bookindex_section.length > 1) {
   // TODO assert failure, reinstate
   // assert(obj_cite_digit_bkidx == ocn_bidx_ obj_cite_digit_bkidx ~ " == ocn_" ~ ocn_ ~ "?");
 }
-#+END_SRC
-
-**** Blurb
-
-#+NAME: docAbstractionBlurb
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 // blurb optional only one 1~ level
 if (the_document_blurb_section.length > 1) {
   foreach (ref obj; the_document_blurb_section) {
@@ -1637,16 +1253,9 @@ if (the_document_blurb_section.length > 1) {
     obj = _links(obj);
   }
 }
-#+END_SRC
-
-*** Get Decendants
-
-#+NAME: docAbstractionGetDecendants
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
-// get decendants
+// get descendants
 if (the_document_body_section.length > 1) {
-  auto pairs = after_doc_get_decendants(
+  auto pairs = after_doc_get_descendants(
     the_document_head_section ~
     the_document_body_section ~
     the_document_endnotes_section ~
@@ -1656,7 +1265,7 @@ if (the_document_body_section.length > 1) {
     the_document_blurb_section ~
     the_document_xml_dom_tail_section
   );
-  debug(decendants_tuple) {
+  debug(descendants_tuple) {
     pairs = pairs.sort();
     foreach (pair; pairs) { // (pair; pairs.sort())
       writeln(pair[0], "..", pair[1]);
@@ -1666,7 +1275,7 @@ if (the_document_body_section.length > 1) {
     if (obj.metainfo.is_a == "heading") {
       foreach (pair; pairs) {
         if (obj.metainfo.ocn == pair[0]) {
-          obj.metainfo.last_decendant_ocn = pair[1];
+          obj.metainfo.last_descendant_ocn = pair[1];
         }
       }
     }
@@ -1676,7 +1285,7 @@ if (the_document_body_section.length > 1) {
       if (obj.metainfo.is_a == "heading") {
         foreach (pair; pairs) {
           if (obj.metainfo.ocn == pair[0]) {
-            obj.metainfo.last_decendant_ocn = pair[1];
+            obj.metainfo.last_descendant_ocn = pair[1];
           }
         }
       }
@@ -1687,7 +1296,7 @@ if (the_document_body_section.length > 1) {
       if (obj.metainfo.is_a == "heading") {
         foreach (pair; pairs) {
           if (obj.metainfo.ocn == pair[0]) {
-            obj.metainfo.last_decendant_ocn = pair[1];
+            obj.metainfo.last_descendant_ocn = pair[1];
           }
         }
       }
@@ -1698,7 +1307,7 @@ if (the_document_body_section.length > 1) {
       if (obj.metainfo.is_a == "heading") {
         foreach (pair; pairs) {
           if (obj.metainfo.ocn == pair[0]) {
-            obj.metainfo.last_decendant_ocn = pair[1];
+            obj.metainfo.last_descendant_ocn = pair[1];
           }
         }
       }
@@ -1709,7 +1318,7 @@ if (the_document_body_section.length > 1) {
       if (obj.metainfo.is_a == "heading") {
         foreach (pair; pairs) {
           if (obj.metainfo.ocn == pair[0]) {
-            obj.metainfo.last_decendant_ocn = pair[1];
+            obj.metainfo.last_descendant_ocn = pair[1];
           }
         }
       }
@@ -1720,7 +1329,7 @@ if (the_document_body_section.length > 1) {
       if (obj.metainfo.is_a == "heading") {
         foreach (pair; pairs) {
           if (obj.metainfo.ocn == pair[0]) {
-            obj.metainfo.last_decendant_ocn = pair[1];
+            obj.metainfo.last_descendant_ocn = pair[1];
           }
         }
       }
@@ -1731,7 +1340,7 @@ if (the_document_body_section.length > 1) {
       if (obj.metainfo.is_a == "heading") {
         foreach (pair; pairs) {
           if (obj.metainfo.ocn == pair[0]) {
-            obj.metainfo.last_decendant_ocn = pair[1];
+            obj.metainfo.last_descendant_ocn = pair[1];
           }
         }
       }
@@ -1742,20 +1351,13 @@ if (the_document_body_section.length > 1) {
       if (obj.metainfo.is_a == "heading") {
         foreach (pair; pairs) {
           if (obj.metainfo.ocn == pair[0]) {
-            obj.metainfo.last_decendant_ocn = pair[1];
+            obj.metainfo.last_descendant_ocn = pair[1];
           }
         }
       }
     }
   }
 }
-#+END_SRC
-
-*** Heading Closes All Open Tags
-
-#+NAME: docAbstractionHeadingCloseOpenTags
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 // TODO
 //  - note create/insert heading object sole purpose eof close all open tags
 //    sort out:
@@ -1780,13 +1382,7 @@ comp_obj_.metainfo.dom_structure_collapsed_tags_status  = dom_structure_collapse
 comp_obj_ = comp_obj_.obj_dom_structure_set_markup_tags(dom_structure_markedup_tags_status, 0);
 comp_obj_ = comp_obj_.obj_dom_set_collapsed_tags(dom_structure_collapsed_tags_status, 0);
 comp_obj_ = comp_obj_.obj_heading_ancestors(lv_ancestors_txt);
-#+END_SRC
-
-*** The Doc
-
-#+NAME: docAbstractionTheDoc
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
+// the_dom_tail_section                      ~= comp_obj_; // remove tail for now, decide on later
 // the doc
 ObjGenericComposite[][string] document_the = [
   "head":             the_document_head_section,
@@ -1854,9 +1450,9 @@ debug(segnames) {
 }
 #+END_SRC
 
-*** Doc Re Init
+*** return structure
 
-#+NAME: docAbstractionDocReInit
+#+NAME: docAbstractionReturnsStruct
 #+HEADER: :noweb yes
 #+BEGIN_SRC d
 // restart
@@ -1884,13 +1480,6 @@ dom_structure_collapsed_tags_status         = [ 0, 0, 0, 0, 0, 0, 0, 0,];
 dom_structure_collapsed_tags_status_buffer  = [ 0, 0, 0, 0, 0, 0, 0, 0,];
 lev_anchor_tag = "";
 anchor_tag = "";
-#+END_SRC
-
-*** Doc Has (identify parts)
-
-#+NAME: docAbstractionDocHasParts
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
 // identify parts
 struct DocHas_ {
   uint inline_links() {
@@ -1942,5127 +1531,17 @@ struct DocHas_ {
 @safe auto doc_has() {
   return DocHas_();
 }
-#+END_SRC
-
-** docAbstraction related Functions
-*** docAbstraction related Functions
-
-#+NAME: docAbstractionRelatedFunctions
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
-@safe pure ObjGenericComposite obj_heading_ancestors()(
-  ObjGenericComposite  obj,
-  string[]             lv_ancestors_txt,
-) {
-  switch (obj.metainfo.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.tags.heading_ancestors_text = lv_ancestors_txt.dup;
-  }
-  return obj;
-}
-@safe pure ObjGenericComposite obj_dom_structure_set_markup_tags()(
-  ObjGenericComposite  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.metainfo.dom_structure_markedup_tags_status = dom.dup;
-  return obj;
-}
-@safe pure ObjGenericComposite obj_dom_set_collapsed_tags()(
-  ObjGenericComposite  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.metainfo.dom_structure_collapsed_tags_status = dom.dup;
-  return obj;
-}
-@safe static  OCNset ocn_emit(int ocn_status_flag) {
-  return object_citation_number.ocn_emitter(ocn_status_flag);
-}
-@safe auto inline_markup_faces(L)(L line) {
-  static auto rgx = RgxI();
-  static auto mkup = InlineMarkup();
-  line = replaceAll!(m => mkup.quote_o ~ m[1] ~ mkup.quote_c)(line, rgx.within_quotes);
-  line = replaceAll!(m => mkup.ff_i ~ mkup.mono ~ mkup.ff_o ~ m["text"] ~ mkup.ff_c ~ mkup.mono)(line, rgx.inline_mark_mono);
-  line = replaceAll!(m => mkup.ff_i ~ mkup.cite ~ mkup.ff_o ~ m["text"] ~ mkup.ff_c ~ mkup.cite)(line, rgx.inline_mark_cite);
-  foreach (regx; [rgx.inline_mark_emphasis, rgx.inline_mark_bold, rgx.inline_mark_underscore, rgx.inline_mark_italics, rgx.inline_mark_superscript, rgx.inline_mark_subscript, rgx.inline_mark_strike, rgx.inline_mark_insert]) {
-    line = replaceAll!(m => mkup.ff_i ~ m["mark"] ~ mkup.ff_o ~ m["text"] ~ mkup.ff_c ~ m["mark"])(line, regx);
-  }
-  return line;
-}
-@safe static string links_and_images()(string obj_txt) {
-  static auto rgx = RgxI();
-  static auto mkup = InlineMarkup();
-  if (obj_txt.match(rgx.smid_inline_url_generic)) {
-    if (
-      obj_txt.match(rgx.smid_inline_link_endnote_url_helper)
-      || obj_txt.match(rgx.smid_inline_link_endnote_url_helper_punctuated)
-    ) {
-      obj_txt = replaceAll!(m => format("%s%s%s%s%s%s%s %s%s%s%s%s%s %s%s",
-        mkup.lnk_o, m["content"].strip, mkup.lnk_c,
-        mkup.url_o, m["link"], mkup.url_c,
-        mkup.en_a_o,
-        mkup.lnk_o, m["link"].strip, mkup.lnk_c,
-        mkup.url_o, m["link"], mkup.url_c,
-        mkup.en_a_c,
-        m[3]
-      ))(obj_txt, rgx.smid_inline_link_endnote_url_helper_punctuated);
-      obj_txt = replaceAll!(m => format("%s%s%s%s%s%s%s %s%s%s%s%s%s %s",
-        mkup.lnk_o, m["content"].strip, mkup.lnk_c,
-        mkup.url_o, m["link"], mkup.url_c,
-        mkup.en_a_o,
-        mkup.lnk_o, m["link"].strip, mkup.lnk_c,
-        mkup.url_o, m["link"], mkup.url_c,
-        mkup.en_a_c
-      ))(obj_txt, rgx.smid_inline_link_endnote_url_helper);
-  } else {
-      obj_txt = replaceAll!(m => format("%s%s%s%s%s%s%s",
-        m["pre"],
-        mkup.lnk_o, m["content"].strip, mkup.lnk_c,
-        mkup.url_o, m["link"], mkup.url_c
-      ))(obj_txt, rgx.smid_inline_link_markup_regular);
-    }
-      obj_txt = replaceAll!(m => format("%s%s%s%s%s%s%s",
-        m["pre"],
-        mkup.lnk_o, m["link"].strip, mkup.lnk_c,
-        mkup.url_o, m["link"], mkup.url_c
-      ))(obj_txt, rgx.smid_inline_link_naked_url); //
-  }
-  return obj_txt;
-}
-// ↓ abstraction struct init
-@safe static auto eN() {
-  struct _e {
-    enum bi {
-      off,
-      on,
-    }
-    enum ocn {
-      off,
-      on,
-      closing,
-      bkidx,
-      reset,
-    }
-    enum sect {
-      unset,
-      head,
-      toc,
-      substantive,
-      bibliography,
-      glossary,
-      book_index,
-      blurb,
-    }
-    enum txt_is {
-      off,
-      para,
-      heading,
-    }
-    enum blk_is {
-      off,
-      code,
-      poem,
-      block,
-      group,
-      table,
-      quote,
-    }
-    enum blk_state {
-      off,
-      on,
-      closing,
-    }
-    enum blk_delim {
-      off,
-      curly,
-      tic,
-      curly_special,
-      tic_special,
-    }
-  }
-  return _e();
-}
-@safe string[string][string] inline_para_link_anchor()(
-  string[string]          an_object,
-  string[string]          tag_in_seg,
-  string[string][string]  tag_assoc
-) {
-  static auto rgx = RgxI();
-  if (auto m = an_object["substantive"].match(rgx.inline_link_anchor)) {
-    if (m.captures[1] !in tag_assoc) {
-      tag_assoc[(m.captures[1])]["seg_lv4"]    = tag_in_seg["seg_lv4"];
-      tag_assoc[(m.captures[1])]["seg_lv1to4"] = tag_in_seg["seg_lv1to4"];
-    } else {
-      writeln("a tag named  already exists, check text line\n    ", an_object["substantive"]);
-    }
-  }
-  return tag_assoc;
-}
-@system ST_txt_by_line_common_reset txt_by_line_common_reset_()(
-  int[string]     line_occur,
-  string[string]  an_object,
-  uint[string]    pith,
-) {
-  line_occur["heading"]                               = eN.bi.off;
-  line_occur["para"]                                  = eN.bi.off;
-  pith["txt_is"]                                      = eN.txt_is.off;
-  an_object                                           = an_object.object_reset;
-  ST_txt_by_line_common_reset ret;
-  {
-    ret.line_occur  = line_occur;
-    ret.this_object = an_object;
-    ret.pith        = pith;
-  }
-  return ret;
-}
-ST_the_section build_the_glossary_section(
-  char[]                 line,             // line is immutable, not necessary to return unchanged
-  uint[string]           pith,
-  string[string][string] tag_assoc,        // only for headings: html & epub
-) {
-  static auto rgx = RgxI();
-  ObjGenericComposite comp_obj_;
-  ObjGenericComposite[] add_to_current_document_section;
-  indent = [
-    "hang_position" : 0,
-    "base_position" : 0,
-  ];
-  bullet = false;
-  pith["txt_is"]           = eN.txt_is.para;
-  line_occur["para"]       = eN.bi.off;
-  an_object_key            = "glossary_nugget";
-  ST_the_section ret;
-  if (line.matchFirst(rgx.heading_glossary)) {
-    {
-      comp_obj_                                = set_object_heading("lev1", "backmatter", "glossary", "Glossary");
-      comp_obj_.metainfo.identifier            = "";
-      comp_obj_.metainfo.dummy_heading         = false;
-      comp_obj_.metainfo.object_number_off     = false;
-      comp_obj_.metainfo.object_number_type    = 0;
-      comp_obj_.tags.segment_anchor_tag_epub   = "_part_glossary";
-      comp_obj_.tags.anchor_tag_html           = comp_obj_.tags.segment_anchor_tag_epub;
-      comp_obj_.tags.in_segment_html           = "glossary";
-      comp_obj_.tags.anchor_tags               = ["section_glossary"];
-      comp_obj_.metainfo.dom_structure_markedup_tags_status  = [ 1, 1, 0, 0, 0, 0, 0, 0];
-      comp_obj_.metainfo.dom_structure_collapsed_tags_status = [ 1, 1, 0, 0, 0, 0, 0, 0];
-      add_to_current_document_section           ~= comp_obj_; //
-      tag_assoc[comp_obj_.tags.anchor_tag_html]["seg_lv4"]            = comp_obj_.tags.in_segment_html;
-      tag_assoc[comp_obj_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = comp_obj_.tags.segment_anchor_tag_epub;
-    } {
-      comp_obj_                                = set_object_heading("lev4", "backmatter", "glossary", "Glossary");
-      comp_obj_.metainfo.identifier            = "";
-      comp_obj_.metainfo.dummy_heading         = true;
-      comp_obj_.metainfo.object_number_off     = true;
-      comp_obj_.metainfo.object_number_type    = 0;
-      comp_obj_.tags.segment_anchor_tag_epub   = "glossary";
-      comp_obj_.tags.anchor_tag_html           = comp_obj_.tags.segment_anchor_tag_epub;
-      comp_obj_.tags.in_segment_html           = comp_obj_.tags.anchor_tag_html;
-      comp_obj_.metainfo.heading_lev_collapsed = 2;
-      comp_obj_.tags.anchor_tags               = ["glossary"];
-      add_to_current_document_section          ~= comp_obj_; //
-      tag_assoc[comp_obj_.tags.anchor_tag_html]["seg_lv4"]            = comp_obj_.tags.in_segment_html;
-      tag_assoc[comp_obj_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = comp_obj_.tags.segment_anchor_tag_epub;
-      pith["ocn"] = eN.ocn.on;
-    }
-    {
-      ret.comp_section_obj         ~= add_to_current_document_section;
-      ret.pith                     = pith;
-      ret.tag_assoc                = tag_assoc; // only for headings: html & epub
-    }
-  } else { // para
-    {
-      auto _get = line.flow_para_match_(an_object, an_object_key, indent, bullet, pith, line_occur);
-      {
-        an_object     = _get.this_object;
-        an_object_key = _get.this_object_key;
-        pith          = _get.pith;
-        indent        = _get.indent;
-        bullet        = _get.bullet;
-        line_occur    = _get.line_occur;
-      }
-    }
-    comp_obj_                               = set_object_generic("backmatter", "glossary", "para", "glossary", links_and_images(line.to!string.strip).replaceFirst(rgx.para_attribs, ""), 0);
-    comp_obj_.metainfo.identifier           = "";
-    comp_obj_.metainfo.object_number_off    = true;
-    comp_obj_.metainfo.object_number_type   = 0;
-    comp_obj_.attrib.indent_hang            = indent["hang_position"];
-    comp_obj_.attrib.indent_base            = indent["base_position"];
-    comp_obj_.attrib.bullet                 = bullet;
-    add_to_current_document_section         ~= comp_obj_; //
-    pith["ocn"]                             = eN.ocn.on;
-    {
-      ret.comp_section_obj = add_to_current_document_section;
-      ret.pith             = pith;
-      ret.tag_assoc        = tag_assoc; // NO CHANGE here, only for headings: html & epub
-    }
-  }
-  return ret;
-}
-ST_the_section build_the_blurb_section(Opt) (
-  char[]                 line,             // line is immutable, not necessary to return unchanged
-  uint[string]           pith,
-  string[string][string] tag_assoc,        // only for headings: html & epub
-  Opt                    opt_action,
-) {
-  static auto rgx = RgxI();
-  ObjGenericComposite comp_obj_;
-  ObjGenericComposite[] add_to_current_document_section;
-  // assert (opt_action.backmatter && opt_action.section_blurb);
-  indent = [
-    "hang_position" : 0,
-    "base_position" : 0,
-  ];
-  bullet = false;
-  if (auto m = line.matchFirst(rgx.para_indent)) {
-    debug(paraindent) { writeln(line); }
-    indent["hang_position"] = (m["indent"]).to!int;
-    indent["base_position"] = (m["indent"]).to!int;
-  } else if (line.matchFirst(rgx.para_bullet)) {
-    debug(parabullet) { writeln(line); }
-    bullet = true;
-  } else if (auto m = line.matchFirst(rgx.para_indent_hang)) {
-    debug(paraindenthang) { writeln(line); }
-    indent = [
-      "hang_position" : (m["hang"]).to!int,
-      "base_position" : (m["indent"]).to!int,
-    ];
-  } else if (auto m = line.matchFirst(rgx.para_bullet_indent)) {
-    debug(parabulletindent) { writeln(line); }
-    indent = [
-      "hang_position" : (m["indent"]).to!int,
-      "base_position" : (m["indent"]).to!int,
-    ];
-    bullet = true;
-  }
-  pith["txt_is"]           = eN.txt_is.para;
-  line_occur["para"]       = eN.bi.off;
-  an_object_key = "blurb_nugget";
-  ST_the_section ret;
-  if (line.matchFirst(rgx.heading_blurb)
-  && (opt_action.backmatter && opt_action.section_blurb)) {
-    {
-      comp_obj_                                              = set_object_heading("lev1", "backmatter", "blurb", "Blurb");
-      comp_obj_.metainfo.identifier                          = "";
-      comp_obj_.metainfo.dummy_heading                       = false;
-      comp_obj_.metainfo.object_number_off                   = false;
-      comp_obj_.metainfo.object_number_type                  = 0;
-      comp_obj_.tags.segment_anchor_tag_epub                 = "_part_blurb";
-      comp_obj_.tags.anchor_tag_html                         = comp_obj_.tags.segment_anchor_tag_epub;
-      comp_obj_.tags.in_segment_html                         = "blurb";
-      comp_obj_.tags.anchor_tags                             = ["section_blurb"];
-      comp_obj_.metainfo.dom_structure_markedup_tags_status  = [ 1, 1, 0, 0, 0, 0, 0, 0];
-      comp_obj_.metainfo.dom_structure_collapsed_tags_status = [ 1, 1, 0, 0, 0, 0, 0, 0];
-      add_to_current_document_section                                 ~= comp_obj_;
-      tag_assoc[comp_obj_.tags.anchor_tag_html]["seg_lv4"]            = comp_obj_.tags.in_segment_html;
-      tag_assoc[comp_obj_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = comp_obj_.tags.segment_anchor_tag_epub;
-    }
-    {
-      comp_obj_                                              = set_object_heading("lev4", "backmatter", "blurb", "Blurb");
-      comp_obj_.metainfo.identifier                          = "";
-      comp_obj_.metainfo.dummy_heading                       = true;
-      comp_obj_.metainfo.object_number_off                   = true;
-      comp_obj_.metainfo.object_number_type                  = 0;
-      comp_obj_.tags.segment_anchor_tag_epub                 = "blurb";
-      comp_obj_.tags.anchor_tag_html                         = comp_obj_.tags.segment_anchor_tag_epub;
-      comp_obj_.tags.in_segment_html                         = comp_obj_.tags.anchor_tag_html;
-      comp_obj_.metainfo.heading_lev_collapsed               = 2;
-      comp_obj_.tags.anchor_tags                             = ["blurb"];
-      add_to_current_document_section                                 ~= comp_obj_;
-      tag_assoc[comp_obj_.tags.anchor_tag_html]["seg_lv4"]            = comp_obj_.tags.in_segment_html;
-      tag_assoc[comp_obj_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = comp_obj_.tags.segment_anchor_tag_epub;
-    }
-  } else if (line.matchFirst(rgx.headings)
-  && (opt_action.backmatter && opt_action.section_blurb)) {
-    comp_obj_                                              = comp_obj_.init;
-    comp_obj_.metainfo.is_of_part                          = "backmatter";
-    comp_obj_.metainfo.is_of_section                       = "blurb";
-    comp_obj_.metainfo.is_of_type                          = "para";
-    comp_obj_.metainfo.is_a                                = "heading";
-    comp_obj_.text                                         = line.to!string;
-    comp_obj_.metainfo.ocn                                 = 0;
-    comp_obj_.metainfo.identifier                          = "";
-    comp_obj_.metainfo.dummy_heading                       = false;
-    comp_obj_.metainfo.object_number_off                   = true;
-    comp_obj_.metainfo.object_number_type                  = 0;
-    comp_obj_.tags.segment_anchor_tag_epub                 = "blurb";
-    comp_obj_.tags.anchor_tag_html                         = comp_obj_.tags.segment_anchor_tag_epub;
-    comp_obj_.tags.in_segment_html                         = comp_obj_.tags.anchor_tag_html;
-    comp_obj_.metainfo.heading_lev_markup                  = an_object["lev_markup_number"].to!int;    // make int, remove need to conv
-    comp_obj_.metainfo.heading_lev_collapsed               = an_object["lev_collapsed_number"].to!int; // make int, remove need to conv
-    comp_obj_.metainfo.parent_ocn                          = 1;
-    comp_obj_.metainfo.parent_lev_markup                   = 0;
-    add_to_current_document_section                                 ~= comp_obj_;
-    tag_assoc[comp_obj_.tags.anchor_tag_html]["seg_lv4"]            = comp_obj_.tags.in_segment_html;
-    tag_assoc[comp_obj_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = comp_obj_.tags.segment_anchor_tag_epub;
-  } else if (!(line.empty)) {
-    {
-      auto _get = line.flow_para_match_(an_object, an_object_key, indent, bullet, pith, line_occur);
-      {
-        an_object     = _get.this_object;
-        an_object_key = _get.this_object_key;
-        pith          = _get.pith;
-        indent        = _get.indent;
-        bullet        = _get.bullet;
-        line_occur    = _get.line_occur;
-      }
-    }
-    comp_obj_                               = set_object_generic("backmatter", "blurb", "para", "blurb", links_and_images(line.to!string.strip).replaceFirst(rgx.para_attribs, ""), 0);
-    comp_obj_.metainfo.identifier           = "";
-    comp_obj_.metainfo.object_number_off    = true;
-    comp_obj_.metainfo.object_number_type   = 0;
-    comp_obj_.attrib.indent_hang            = indent["hang_position"];
-    comp_obj_.attrib.indent_base            = indent["base_position"];
-    comp_obj_.has.inline_links              = true;
-    comp_obj_.attrib.bullet                 = bullet;
-    add_to_current_document_section         ~= comp_obj_;
-  }
-  pith["ocn"] = eN.ocn.on;
-  {
-    ret.comp_section_obj = add_to_current_document_section;
-    ret.pith             = pith;
-    ret.tag_assoc        = tag_assoc; // NO CHANGE here, only for headings: html & epub
-  }
-  return ret;
-}
-@safe ST_txt_by_line_block_start txt_by_line_block_start()(
-  char[]         line,
-  uint[string]   pith,
-  uint[string]   dochas,
-  string[string] object_number_poem
-) {
-  static auto rgx = RgxI();
-  if (auto m = line.matchFirst(rgx.block_curly_code_open)) {
-    dochas["codeblock"]++;
-    an_object["lang"]               = "";
-    an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
-    an_object["syntax"]             = (m["syntax"]) ? m["syntax"].to!string : "";
-    debug(codecurly) { writefln( "* [code curly] %s", line); }                              // code (curly) open
-    pith["block_is"]                = eN.blk_is.code;
-    pith["block_state"]             = eN.blk_state.on;
-    pith["block_delim"]             = eN.blk_delim.curly;
-  } else if (auto m = line.matchFirst(rgx.block_curly_poem_open)) {
-    dochas["poem"]++;
-    an_object["syntax"]             = "";
-    an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
-    an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-    debug(poem) { writefln( "* [poem curly] %s", line); }                              // poem (curly) open
-    object_number_poem["start"]     = obj_cite_digits.object_number.to!string;
-    pith["block_is"]                = eN.blk_is.poem;
-    pith["block_state"]             = eN.blk_state.on;
-    pith["block_delim"]             = eN.blk_delim.curly;
-    pith["verse_new"]               = eN.bi.on;
-  } else if (auto m = line.matchFirst(rgx.block_curly_group_open)) {
-    dochas["group"]++;
-    an_object["syntax"]             = "";
-    an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
-    an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-    debug(group) { writefln( "* [group curly] %s", line); }                             // group (curly) open
-    pith["block_is"]                = eN.blk_is.group;
-    pith["block_state"]             = eN.blk_state.on;
-    pith["block_delim"]             = eN.blk_delim.curly;
-  } else if (auto m = line.matchFirst(rgx.block_curly_block_open)) {
-    dochas["block"]++;
-    an_object["syntax"]             = "";
-    an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
-    an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-    debug(block) { writefln( "* [block curly] %s", line); }
-    pith["block_is"]                = eN.blk_is.block;
-    pith["block_state"]             = eN.blk_state.on;
-    pith["block_delim"]             = eN.blk_delim.curly;
-  } else if (auto m = line.matchFirst(rgx.block_curly_quote_open)) {
-    dochas["quote"]++;
-    an_object["syntax"]             = "";
-    an_object["attrib"]             = m["attrib"].to!string;
-    an_object["lang"]               = m["lang"].to!string;
-    debug(quote) { writefln( "* [quote curly] %s", line); }
-    pith["block_is"]                = eN.blk_is.quote;
-    pith["block_state"]             = eN.blk_state.on;
-    pith["block_delim"]             = eN.blk_delim.curly;
-  } else if (auto m = line.matchFirst(rgx.block_curly_table_open)) {           // curly table open
-    debug(table) { writefln( "* [table curly] %s", line); }
-    dochas["table"] ++;
-    an_object["table_head"]         = m["attrib"].to!string;
-    an_object["block_type"]         = "curly";
-    pith["block_is"]                = eN.blk_is.table;
-    pith["block_state"]             = eN.blk_state.on;
-    pith["block_delim"]             = eN.blk_delim.curly;
-  } else if (auto m = line.matchFirst(rgx.block_curly_table_special_markup)) { // table: special table block markup syntax!
-    dochas["table"]++;
-    an_object["table_head"]         = m["attrib"].to!string;
-    an_object["block_type"]         = "special";
-    pith["block_is"]                = eN.blk_is.table;
-    pith["block_state"]             = eN.blk_state.on;
-    pith["block_delim"]             = eN.blk_delim.curly_special;
-  } else if (auto m = line.matchFirst(rgx.block_tic_code_open)) {
-    dochas["codeblock"]++;
-    an_object["lang"]               = "";
-    an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
-    an_object["syntax"]             = (m["syntax"]) ? m["syntax"].to!string : "";
-    debug(codetic) { writefln( "* [code tic] %s", line); }
-    pith["block_is"]                = eN.blk_is.code;
-    pith["block_state"]             = eN.blk_state.on;
-    pith["block_delim"]             = eN.blk_delim.tic;
-  } else if (auto m = line.matchFirst(rgx.block_tic_poem_open)) {
-    dochas["poem"]++;
-    an_object["syntax"]             = "";
-    an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
-    an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-    debug(poem) { writefln( "* [poem tic] %s", line); }
-    object_number_poem["start"]     = obj_cite_digits.object_number.to!string;
-    pith["block_is"]                = eN.blk_is.poem;
-    pith["block_state"]             = eN.blk_state.on;
-    pith["block_delim"]             = eN.blk_delim.tic;
-    pith["verse_new"]               = eN.bi.on;
-  } else if (auto m = line.matchFirst(rgx.block_tic_group_open)) {
-    dochas["group"]++;
-    an_object["syntax"]             = "";
-    an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
-    an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-    debug(group) { writefln( "* [group tic] %s", line); }
-    pith["block_is"]                = eN.blk_is.group;
-    pith["block_state"]             = eN.blk_state.on;
-    pith["block_delim"]             = eN.blk_delim.tic;
-  } else if (auto m = line.matchFirst(rgx.block_tic_block_open)) {
-    dochas["block"]++;
-    an_object["syntax"]             = "";
-    an_object["attrib"]             = (m["attrib"]) ? m["attrib"].to!string : "";
-    an_object["lang"]               = (m["lang"]) ? m["lang"].to!string : "";
-    debug(block) { writefln( "* [block tic] %s", line); }
-    pith["block_is"]                = eN.blk_is.block;
-    pith["block_state"]             = eN.blk_state.on;
-    pith["block_delim"]             = eN.blk_delim.tic;
-  } else if (auto m = line.matchFirst(rgx.block_tic_quote_open)) {
-    dochas["quote"]++;
-    an_object["syntax"]             = "";
-    an_object["attrib"]             = m["attrib"].to!string;
-    an_object["lang"]               = m["lang"].to!string;
-    debug(quote) { writefln( "* [quote tic] %s", line);                        // quote (tic) open
-    }
-    pith["block_is"]                = eN.blk_is.quote;
-    pith["block_state"]             = eN.blk_state.on;
-    pith["block_delim"]             = eN.blk_delim.tic;
-  } else if (auto m = line.matchFirst(rgx.block_tic_table_open)) {             // tic table open
-    debug(table) { writefln( "* [table tic] %s", line); }
-    dochas["table"] ++;
-    an_object["table_head"]         = m["attrib"].to!string;
-    an_object["block_type"]         = "tic";
-    pith["block_is"]                = eN.blk_is.table;
-    pith["block_state"]             = eN.blk_state.on;
-    pith["block_delim"]             = eN.blk_delim.tic;
-  }
-  ST_txt_by_line_block_start ret;
-  {
-    ret.pith               = pith;
-    ret.dochas             = dochas;
-    ret.object_number_poem = object_number_poem;
-  }
-  return ret;
-}
-@safe ST_txt_by_line_block_generic txt_by_line_block_quote()(
-  char[]          line,
-  string[string]  an_object,
-  uint[string]    pith,
-) {
-  static auto rgx = RgxI();
-  if (pith["block_is"] == eN.blk_is.quote){
-    if (pith["block_delim"] == eN.blk_delim.curly) {
-      if (line.matchFirst(rgx.block_curly_quote_close)) {
-        debug(quote) { writeln(line); }
-        an_object[an_object_key]    = an_object[an_object_key].stripRight;
-        pith["block_is"]            = eN.blk_is.quote;
-        pith["block_state"]         = eN.blk_state.closing;
-        pith["block_delim"]         = eN.blk_delim.off;
-      } else {
-        debug(quote) { writeln(line); }
-        an_object[an_object_key] ~= line ~= "\n";
-      }
-    } else if (pith["block_delim"] == eN.blk_delim.tic) {
-      if (line.matchFirst(rgx.block_tic_close)) {
-        debug(quote) { writeln(line); }
-        an_object[an_object_key]    = an_object[an_object_key].stripRight;
-        pith["block_is"]            = eN.blk_is.quote;
-        pith["block_state"]         = eN.blk_state.closing;
-        pith["block_delim"]         = eN.blk_delim.off;
-      } else {
-        debug(quote) { writeln(line); }
-        an_object[an_object_key] ~= line ~= "\n";
-      }
-    }
-  }
-  ST_txt_by_line_block_generic ret;
-  {
-    ret.pith        = pith;
-    ret.this_object = an_object;
-  }
-  return ret;
-}
-@safe ST_txt_by_line_block_generic txt_by_line_block_group()(
-  char[]          line,
-  string[string]  an_object,
-  uint[string]    pith,
-) {
-  static auto rgx = RgxI();
-  if (pith["block_is"] == eN.blk_is.group) {
-    if (pith["block_delim"] == eN.blk_delim.curly) {
-      if (line.matchFirst(rgx.block_curly_group_close)) {
-        debug(group) { writeln(line); }
-        an_object[an_object_key]    = an_object[an_object_key].stripRight;
-        pith["block_is"]            = eN.blk_is.group;
-        pith["block_state"]         = eN.blk_state.closing;
-        pith["block_delim"]         = eN.blk_delim.off;
-      } else {
-        debug(group) { writeln(line); }
-        an_object[an_object_key] ~= line ~= "\n";
-      }
-    } else if (pith["block_delim"] == eN.blk_delim.tic) {
-      if (line.matchFirst(rgx.block_tic_close)) {
-        debug(group) { writeln(line); }
-        an_object[an_object_key]    = an_object[an_object_key].stripRight;
-        pith["block_is"]            = eN.blk_is.group;
-        pith["block_state"]         = eN.blk_state.closing;
-        pith["block_delim"]         = eN.blk_delim.off;
-      } else {
-        debug(group) { writeln(line); }
-        an_object[an_object_key] ~= line ~= "\n";
-      }
-    }
-  }
-  ST_txt_by_line_block_generic ret;
-  {
-    ret.pith        = pith;
-    ret.this_object = an_object;
-  }
-  return ret;
-}
-@safe ST_txt_by_line_block_generic txt_by_line_block_block()(
-  char[]          line,
-  string[string]  an_object,
-  uint[string]    pith,
-) {
-  static auto rgx = RgxI();
-  if (pith["block_is"] == eN.blk_is.block) {
-    if (pith["block_delim"] == eN.blk_delim.curly) {
-      if (line.matchFirst(rgx.block_curly_block_close)) {
-        debug(block) { writeln(line); }
-        an_object[an_object_key]    = an_object[an_object_key].stripRight;
-        pith["block_is"]            = eN.blk_is.block;
-        pith["block_state"]         = eN.blk_state.closing;
-        pith["block_delim"]         = eN.blk_delim.off;
-      } else {
-        debug(block) { writeln(line); }
-        an_object[an_object_key] ~= line ~= "\n";
-      }
-    } else if (pith["block_delim"] == eN.blk_delim.tic) {
-      if (line.matchFirst(rgx.block_tic_close)) {
-        debug(block) { writeln(line); }
-        an_object[an_object_key]    = an_object[an_object_key].stripRight;
-        pith["block_is"]            = eN.blk_is.block;
-        pith["block_state"]         = eN.blk_state.closing;
-        pith["block_delim"]         = eN.blk_delim.off;
-      } else {
-        debug(block) { writeln(line); }
-        an_object[an_object_key] ~= line ~= "\n";
-      }
-    }
-  }
-  ST_txt_by_line_block_generic ret;
-  {
-    ret.pith        = pith;
-    ret.this_object = an_object;
-  }
-  return ret;
-}
-@safe ST_txt_by_line_block_poem txt_by_line_block_poem(CMM)(
-  char[]          line,
-  string[string]  an_object,
-  uint[string]    pith,
-  int             cntr,
-  string[string]  object_number_poem,
-  CMM             conf_make_meta,
-  string[string]  tag_in_seg,
-) {
-  static auto rgx = RgxI();
-  if (pith["block_is"] == eN.blk_is.poem) {
-    if (pith["block_delim"] == eN.blk_delim.curly) {
-      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) { writefln( "* [poem curly] %s", line); }
-          if (processing.length > 0) {
-            an_object[an_object_key]      = processing["verse"];
-          }
-          debug(poem) {
-            writeln(__LINE__);
-            writefln( "* %s %s", obj_cite_digits.object_number, line);
-          }
-          if (an_object.length > 0) {
-            debug(poem) { writeln( obj_cite_digits.object_number, an_object[an_object_key]); }
-            an_object["is"]                                   = "verse";
-            ST_txtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_struct
-              = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta, No._new_doc);
-            an_object["substantive"]                          = substantive_obj_misc_struct.obj_txt;
-            anchor_tag                                        = substantive_obj_misc_struct.anchor_tag;
-            comp_obj_                                         = set_object_generic("body", "body", "block", "verse", an_object["substantive"], obj_cite_digits.object_number);
-            comp_obj_.metainfo.identifier                     = obj_cite_digits.identifier;
-            comp_obj_.metainfo.object_number_off              = obj_cite_digits.off;
-            comp_obj_.metainfo.o_n_book_index                 = obj_cite_digits.bkidx;
-            comp_obj_.metainfo.object_number_type             = obj_cite_digits.type;
-            comp_obj_.tags.html_segment_anchor_tag_is         = tag_in_seg["seg_lv4"];
-            comp_obj_.tags.epub_segment_anchor_tag_is         = tag_in_seg["seg_lv1to4"];
-            comp_obj_.has.inline_notes_reg                    = substantive_obj_misc_struct.has_notes_reg;
-            comp_obj_.has.inline_notes_star                   = substantive_obj_misc_struct.has_notes_star;
-            comp_obj_.has.inline_links                        = substantive_obj_misc_struct.has_links;
-            the_document_body_section                         ~= comp_obj_;
-            tag_assoc                                         = an_object.inline_para_link_anchor(tag_in_seg, tag_assoc);
-          }
-          object_reset(an_object);
-          processing.remove("verse");
-          ++cntr;
-        }
-        object_number_poem["end"]   = obj_cite_digits.object_number.to!string;
-        pith["block_is"]            = eN.blk_is.poem;
-        pith["block_state"]         = eN.blk_state.closing;
-        pith["block_delim"]         = eN.blk_delim.off;
-      } else {
-        processing["verse"] ~= line ~= "\n";
-        if (pith["verse_new"] == eN.bi.on) {
-          obj_cite_digits = ocn_emit(pith["ocn"]);
-          pith["verse_new"]         = eN.bi.off;
-        } else if (line.matchFirst(rgx.newline_eol_delimiter_only)) {
-          processing["verse"]       = processing["verse"].stripRight;
-          verse_line                = eN.bi.off;
-          pith["verse_new"]         = eN.bi.on;
-        }
-        if (pith["verse_new"] == eN.bi.on) {
-          verse_line = 1;
-          an_object[an_object_key]  = processing["verse"];
-          debug(poem) { writefln(
-              "* %s curly\n%s",
-              obj_cite_digits.object_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,
-            tag_in_seg,
-            lev_anchor_tag,
-            tag_assoc,
-            obj_cite_digits,
-            cntr,
-            heading_ptr-1,
-            an_object["is"]
-          );
-          ST_txtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_struct
-            = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta, No._new_doc);
-          an_object["substantive"]                            = substantive_obj_misc_struct.obj_txt;
-          anchor_tag                                          = substantive_obj_misc_struct.anchor_tag;
-          comp_obj_                                           = set_object_generic("body", "body", "block", "verse", an_object["substantive"], obj_cite_digits.object_number);
-          comp_obj_.metainfo.identifier                       = obj_cite_digits.identifier;
-          comp_obj_.metainfo.object_number_off                = obj_cite_digits.off;
-          comp_obj_.metainfo.o_n_book_index                   = obj_cite_digits.bkidx;
-          comp_obj_.metainfo.object_number_type               = obj_cite_digits.type;
-          comp_obj_.tags.html_segment_anchor_tag_is           = tag_in_seg["seg_lv4"];
-          comp_obj_.tags.epub_segment_anchor_tag_is           = tag_in_seg["seg_lv1to4"];
-          comp_obj_.has.inline_notes_reg                      = substantive_obj_misc_struct.has_notes_reg;
-          comp_obj_.has.inline_notes_star                     = substantive_obj_misc_struct.has_notes_star;
-          comp_obj_.has.inline_links                          = substantive_obj_misc_struct.has_links;
-          the_document_body_section                           ~= comp_obj_;
-          tag_assoc                                           = an_object.inline_para_link_anchor(tag_in_seg, tag_assoc);
-          object_reset(an_object);
-          processing.remove("verse");
-          ++cntr;
-        }
-      }
-    } else if (pith["block_delim"] == eN.blk_delim.tic) {
-      if (auto m = line.matchFirst(rgx.block_tic_close)) {
-        an_object[an_object_key] = "verse";
-        debug(poem) { writefln( "* [poem tic] %s", line); }
-        if (processing.length > 0) {
-          an_object[an_object_key]  = processing["verse"];
-        }
-        if (an_object.length > 0) {
-          debug(poem) { writeln(__LINE__); writeln(obj_cite_digits.object_number, line); }
-          processing.remove("verse");
-          an_object["is"]                                     = "verse";
-          ST_txtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_struct
-            = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta, No._new_doc);
-          an_object["substantive"]                            = substantive_obj_misc_struct.obj_txt;
-          anchor_tag                                          = substantive_obj_misc_struct.anchor_tag;
-          comp_obj_                                           = set_object_generic("body", "body", "block", "verse", an_object["substantive"], obj_cite_digits.object_number);
-          comp_obj_.metainfo.identifier                       = obj_cite_digits.identifier;
-          comp_obj_.metainfo.object_number_off                = obj_cite_digits.off;
-          comp_obj_.metainfo.o_n_book_index                   = obj_cite_digits.bkidx;
-          comp_obj_.metainfo.object_number_type               = obj_cite_digits.type;
-          comp_obj_.tags.html_segment_anchor_tag_is           = tag_in_seg["seg_lv4"];
-          comp_obj_.tags.epub_segment_anchor_tag_is           = tag_in_seg["seg_lv1to4"];
-          comp_obj_.has.inline_notes_reg                      = substantive_obj_misc_struct.has_notes_reg;
-          comp_obj_.has.inline_notes_star                     = substantive_obj_misc_struct.has_notes_star;
-          comp_obj_.has.inline_links                          = substantive_obj_misc_struct.has_links;
-          the_document_body_section                           ~= comp_obj_;
-          tag_assoc                                           = an_object.inline_para_link_anchor(tag_in_seg, tag_assoc);
-          object_number_poem["end"]                           = obj_cite_digits.object_number.to!string;
-          object_reset(an_object);
-          processing.remove("verse");
-          ++cntr;
-        }
-        pith["block_is"]            = eN.blk_is.poem;
-        pith["block_state"]         = eN.blk_state.closing;
-        pith["block_delim"]         = eN.blk_delim.off;
-      } else {
-        processing["verse"]         ~= line ~= "\n";
-        if (pith["verse_new"] == eN.bi.on) {
-          obj_cite_digits           = ocn_emit(pith["ocn"]);
-          pith["verse_new"]         = eN.bi.off;
-        } else if (line.matchFirst(rgx.newline_eol_delimiter_only)) {
-          processing["verse"]       = processing["verse"].stripRight;
-          pith["verse_new"]         = eN.bi.on;
-          verse_line                = eN.bi.off;
-        }
-        if (pith["verse_new"] == eN.bi.on) {
-          verse_line = 1;
-          an_object[an_object_key]  = processing["verse"];
-          debug(poem) { writefln(
-              "* %s tic\n%s",
-              obj_cite_digits.object_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,
-              tag_in_seg,
-              lev_anchor_tag,
-              tag_assoc,
-              obj_cite_digits,
-              cntr,
-              heading_ptr-1,
-              an_object["is"]
-            );
-          ST_txtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_struct
-            = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta, No._new_doc);
-          an_object["substantive"]                            = substantive_obj_misc_struct.obj_txt;
-          anchor_tag                                          = substantive_obj_misc_struct.anchor_tag;
-          comp_obj_                                           = set_object_generic("body", "body", "block", "verse", an_object["substantive"], obj_cite_digits.object_number);
-          comp_obj_.metainfo.identifier                       = obj_cite_digits.identifier;
-          comp_obj_.metainfo.object_number_off                = obj_cite_digits.off;
-          comp_obj_.metainfo.o_n_book_index                   = obj_cite_digits.bkidx;
-          comp_obj_.metainfo.object_number_type               = obj_cite_digits.type;
-          comp_obj_.tags.html_segment_anchor_tag_is           = tag_in_seg["seg_lv4"];
-          comp_obj_.tags.epub_segment_anchor_tag_is           = tag_in_seg["seg_lv1to4"];
-          comp_obj_.has.inline_notes_reg                      = substantive_obj_misc_struct.has_notes_reg;
-          comp_obj_.has.inline_notes_star                     = substantive_obj_misc_struct.has_notes_star;
-          comp_obj_.has.inline_links                          = substantive_obj_misc_struct.has_links;
-          the_document_body_section                           ~= comp_obj_;
-          tag_assoc                                           = an_object.inline_para_link_anchor(tag_in_seg, tag_assoc);
-          object_reset(an_object);
-          processing.remove("verse");
-          ++cntr;
-        }
-      }
-    }
-  }
-  ST_txt_by_line_block_poem ret;
-  {
-    ret.cntr        = cntr;
-    ret.pith        = pith;
-    ret.this_object = an_object;
-  }
-  return ret;
-}
-@safe ST_txt_by_line_block_generic txt_by_line_block_code()(
-  char[]          line,
-  string[string]  an_object,
-  uint[string]    pith,
-) {
-  static auto rgx = RgxI();
-  if ( pith["block_is"] == eN.blk_is.code) {
-    if (pith["block_delim"] == eN.blk_delim.curly) {
-      if (line.matchFirst(rgx.block_curly_code_close)) {
-        debug(codecurly) { writeln(line); }
-        an_object[an_object_key] = an_object[an_object_key]
-          .replaceFirst(rgx.newline_eol_delimiter_only, "")
-          .stripRight;
-        pith["block_is"]            = eN.blk_is.code;
-        pith["block_state"]         = eN.blk_state.closing;
-        pith["block_delim"]         = eN.blk_delim.off;
-      } else {
-        debug(codecurly) { writeln(line); }
-        an_object[an_object_key] ~= line ~= "\n";
-      }
-    } else if (pith["block_delim"] == eN.blk_delim.tic) {
-      if (line.matchFirst(rgx.block_tic_close)) {
-        debug(codetic) { writeln(line); }
-        an_object[an_object_key] = an_object[an_object_key]
-          .replaceFirst(rgx.newline_eol_delimiter_only, "")
-          .stripRight;
-        pith["block_is"]            = eN.blk_is.code;
-        pith["block_state"]         = eN.blk_state.closing;
-        pith["block_delim"]         = eN.blk_delim.off;
-      } else {
-        debug(codetic) { writeln(line); }
-        an_object[an_object_key] ~= line ~= "\n";
-      }
-    }
-  }
-  ST_txt_by_line_block_generic ret;
-  {
-    ret.pith        = pith;
-    ret.this_object = an_object;
-  }
-  return ret;
-}
-@system auto txt_by_line_block_table(CMM)(
-  char[]          line,
-  string[string]  an_object,
-  uint[string]    pith,
-  CMM             conf_make_meta,
-) {
-  static auto rgx = RgxI();
-  if (pith["block_is"] == eN.blk_is.table) {
-    if (pith["block_delim"] == eN.blk_delim.curly) {
-      if (line.matchFirst(rgx.block_curly_table_close)) {
-        debug(table) { writeln(line); }
-        pith["block_is"]            = eN.blk_is.table;
-        pith["block_state"]         = eN.blk_state.closing;
-        pith["block_delim"]         = eN.blk_delim.off;
-      } else {
-        debug(table) { writeln(line); }
-        an_object[an_object_key] ~= line ~= "\n";
-      }
-    } else if (pith["block_delim"] == eN.blk_delim.curly_special) {
-      if (line.empty) {
-        pith["block_is"]            = eN.blk_is.table;
-        pith["block_state"]         = eN.blk_state.off;
-        pith["block_delim"]         = eN.blk_delim.off;
-        {
-          auto _get = line.flow_table_closed_make_special_notation_table_(
-            an_object,
-            the_document_body_section,
-            obj_cite_digits,
-            comp_obj_,
-            cntr,
-            pith,
-            conf_make_meta,
-          );
-          {
-            an_object                 = _get.this_object;
-            the_document_body_section = _get.the_document_body_section;
-            obj_cite_digits           = _get.obj_cite_digits;
-            comp_obj_                 = _get.comp_obj_;
-            cntr                      = _get.cntr;
-            pith                      = _get.pith;
-          }
-        }
-      } else {
-        debug(table) { writeln(line); }
-        an_object[an_object_key] ~= line ~= "\n";
-      }
-    } else if (pith["block_delim"] == eN.blk_delim.tic) {
-      if (line.matchFirst(rgx.block_tic_close)) {
-        debug(table) { writeln(line); }
-        pith["block_is"]            = eN.blk_is.table;
-        pith["block_state"]         = eN.blk_state.closing;
-        pith["block_delim"]         = eN.blk_delim.off;
-      } else {
-        debug(table) { writeln(line); }
-        an_object[an_object_key] ~= line ~= "\n";
-      }
-    }
-  }
-  struct ST_txt_by_line_block_table {
-    CMM             conf_make_meta;
-    uint[string]    pith;
-    string[string]  this_object;
-  }
-  ST_txt_by_line_block_table ret;
-  {
-    ret.conf_make_meta = conf_make_meta,
-    ret.pith           = pith;
-    ret.this_object    = an_object;
-  }
-  return ret;
-}
-@system ST_txt_by_line_block_biblio txt_by_line_block_biblio(
-  char[]                  line,
-  uint[string] pith,
-  int          bib_entry,
-  string       biblio_entry_str_json,
-  string[]     biblio_arr_json,
-) {
-  mixin spineBiblio;
-  auto jsn = BibJsnStr();
-  static auto rgx = RgxI();
-  string biblio_tag_map()(string abr) {
-    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];
-  }
-  if (line.matchFirst(rgx.heading_biblio)) {
-    pith["section"] = eN.sect.bibliography;
-  }
-  if (line.empty) {
-    debug {
-      debug(biblioblock) { writeln("---"); }
-      debug(biblioblockinclude) { writeln(biblio_entry_str_json.length); }
-    }
-    if ((bib_entry == eN.bi.off)
-    && (biblio_entry_str_json.empty)) {
-      bib_entry = eN.bi.on;
-      biblio_entry_str_json = jsn.biblio_entry_tags_jsonstr;
-    } else if (!(biblio_entry_str_json.empty)) {
-      bib_entry = eN.bi.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 {
-      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 = eN.bi.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        = "";
-  }
-  ST_txt_by_line_block_biblio ret;
-  {
-    ret.pith                  = pith;
-    ret.bib_entry             = bib_entry;
-    ret.biblio_entry_str_json = biblio_entry_str_json;
-    ret.biblio_arr_json       = biblio_arr_json;
-  }
-  return ret;
-}
-// ↓ abstraction functions
-@safe static string[string] object_reset()(string[string] an_object) {
-  an_object.remove("body_nugget");
-  an_object.remove("substantive");
-  an_object.remove("is");
-  an_object.remove("attrib");
-  an_object.remove("bookindex_nugget");
-  return an_object;
-}
-@safe static uint[string] _check_ocn_status_()(
-  char[]       line,
-  uint[string] pith,
-) {
-  static auto rgx = RgxI();
-  if (!(line.empty)) {
-    if (pith["no_ocn_multiple_objects"] == eN.bi.off) {
-      // not multi-line object, check whether object_number is on or turned off
-      if (line.matchFirst(rgx.object_number_block_marks)) {                      // switch off object_number
-        if (line.matchFirst(rgx.object_number_off_block)) {
-          pith["no_ocn_multiple_objects"]             = eN.bi.on;
-          pith["ocn"]                                 = eN.ocn.off;
-          debug(ocnoff) { writeln(line); }
-        }
-        if (line.matchFirst(rgx.object_number_off_block_dummy_heading)) {
-          pith["no_ocn_multiple_objects"]             = eN.bi.on;
-          pith["dummy_heading_multiple_objects"]      = eN.bi.on;
-          pith["ocn"]                                 = eN.ocn.off;
-          debug(ocnoff) { writeln(line); }
-        }
-      } else if (pith["no_ocn_multiple_objects"] == eN.bi.off) {
-          pith["dummy_heading_status"]                = eN.bi.off;
-          if (pith["dummy_heading_multiple_objects"]) {
-            pith["dummy_heading_status"]              = eN.bi.on;
-          }
-          if (line.matchFirst(rgx.object_number_off)) {
-            pith["ocn"]                               = eN.ocn.off;
-          } else if (line.matchFirst(rgx.object_number_off_dummy_heading)) {
-            pith["ocn"]                               = eN.ocn.off;
-            pith["dummy_heading_status"]              = eN.bi.on;
-          } else {
-            pith["ocn"]                               = eN.ocn.on;
-            pith["dummy_heading_status"]              = eN.bi.off;
-          }
-        } else {
-          pith["ocn"] = pith["no_ocn_multiple_objects"];
-        }
-    } else if (pith["no_ocn_multiple_objects"] == eN.bi.on) {
-      if (line.matchFirst(rgx.object_number_off_block_close)) {
-        pith["no_ocn_multiple_objects"]               = eN.bi.off;
-        pith["ocn"]                                   = eN.ocn.on;
-        pith["dummy_heading_status"]                  = eN.bi.off;
-        debug(ocnoff) { writeln(line); }
-      }
-    }
-  }
-  return pith;
-}
-@safe char[] _doc_header_and_make_substitutions_(CMM)(
-  char[]  line,
-  CMM     conf_make_meta,
-) {
-  enum Substitute { match, markup, }
-  if (conf_make_meta.make.substitute) {
-    foreach(substitution_pair; conf_make_meta.make.substitute) {
-      line = line.replaceAll(
-        regex("\b" ~ substitution_pair[Substitute.match]),
-        substitution_pair[Substitute.markup]
-      );
-    }
-  }
-  return line;
-}
-@safe char[] _doc_header_and_make_substitutions_fontface_(CMM)(
-  char[]  line,
-  CMM     conf_make_meta,
-) {
-  enum Substitute { match, markup, }
-  if ( conf_make_meta.make.bold) {
-    line = line.replaceAll(
-      regex("\b" ~ conf_make_meta.make.bold[Substitute.match]),
-      conf_make_meta.make.bold[Substitute.markup]
-    );
-  }
-  if (conf_make_meta.make.emphasis) {
-    line = line.replaceAll(
-      regex("\b" ~ conf_make_meta.make.emphasis[Substitute.match]),
-      conf_make_meta.make.emphasis[Substitute.markup]
-    );
-  }
-  if (conf_make_meta.make.italics) {
-    line = line.replaceAll(
-      regex("\b" ~ conf_make_meta.make.italics[Substitute.match]),
-      conf_make_meta.make.italics[Substitute.markup]
-    );
-  }
-  return line;
-}
-@system ST_flow_table_closed_make_special_notation_table flow_table_closed_make_special_notation_table_(CMM)(
-  char[]                line,
-  string[string]        an_object,
-  ObjGenericComposite[] the_document_body_section,
-  OCNset                obj_cite_digits,
-  ObjGenericComposite   comp_obj_,
-  int                   cntr,
-  uint[string]          pith,
-  CMM                   conf_make_meta
-) {
-  comp_obj_       = comp_obj_.init;
-  obj_cite_digits = ocn_emit(pith["ocn"]);
-  auto comp_obj_location = node_construct.node_location_emitter(
-      content_non_header,
-      tag_in_seg,
-      lev_anchor_tag,
-      tag_assoc,
-      obj_cite_digits,
-      cntr,
-      heading_ptr-1,
-      "table"
-    );
-  an_object["is"]                                             = "table";
-  ST_txtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_struct
-    = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, "body_nugget", conf_make_meta, No._new_doc);
-  an_object["substantive"]                                    = substantive_obj_misc_struct.obj_txt;
-  comp_obj_.metainfo.ocn                                      = obj_cite_digits.object_number;
-  comp_obj_.metainfo.identifier                               = obj_cite_digits.identifier;
-  comp_obj_.metainfo.object_number_off                        = obj_cite_digits.off;
-  comp_obj_.tags.html_segment_anchor_tag_is                   = tag_in_seg["seg_lv4"];
-  comp_obj_.tags.epub_segment_anchor_tag_is                   = tag_in_seg["seg_lv1to4"];
-  comp_obj_.metainfo.o_n_book_index                           = obj_cite_digits.bkidx;
-  comp_obj_.metainfo.object_number_type                       = obj_cite_digits.type;
-  comp_obj_                                                   = comp_obj_.flow_table_instructions(an_object["table_head"]);
-  {
-    auto _get = comp_obj_.flow_table_substantive_munge_special(an_object["substantive"]);
-    {
-      comp_obj_           = _get.table_object;
-      an_object["substantive"] = _get.table_substantive;
-    }
-  }
-  the_document_body_section                                   ~= comp_obj_;
-  object_reset(an_object);
-  processing.remove("verse");
-  ++cntr;
-  ST_flow_table_closed_make_special_notation_table ret;
-  {
-    ret.this_object               = an_object;
-    ret.the_document_body_section = the_document_body_section;
-    ret.obj_cite_digits           = obj_cite_digits;
-    ret.comp_obj_                 = comp_obj_;
-    ret.cntr                      = cntr;
-    ret.pith                      = pith;
-  }
-  return ret;
-}
-@system ST_flow_block_flag_line_empty flow_block_flag_line_empty_(B,CMM,Ts)(
-  char[]                   line,
-  string[string]           an_object,
-  B                        bookindex_extract_hash,
-  ObjGenericComposite[]    the_document_body_section,
-  string[][string][string] bookindex_unordered_hashes,
-  OCNset                   obj_cite_digits,
-  ObjGenericComposite      comp_obj_,
-  int                      cntr,
-  uint[string]             pith,
-  string[string]           object_number_poem,
-  CMM                      conf_make_meta,
-  Ts                       tag_in_seg,
-) {
-  assert(
-    line.empty,
-    "\nline should be empty:\n  \""
-    ~ line ~ "\""
-  );
-  assert(
-    (pith["block_state"] == eN.blk_state.closing),
-    "code block status: closed"
-  );
-  static auto rgx = RgxI();
-  if (pith["block_state"] == eN.blk_state.closing) {
-    if (pith["block_is"] == eN.blk_is.quote) {
-      obj_cite_digits = ocn_emit(pith["ocn"]);
-      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_digits,
-          tag_in_seg
-        );
-      an_object["is"]                                         = "quote";
-      auto comp_obj_location
-        = node_construct.node_location_emitter(
-          content_non_header,
-          tag_in_seg,
-          lev_anchor_tag,
-          tag_assoc,
-          obj_cite_digits,
-          cntr,
-          heading_ptr-1,
-          an_object["is"]
-        );
-      ST_txtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_struct
-        = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta, No._new_doc);
-      an_object["substantive"]                                = substantive_obj_misc_struct.obj_txt;
-      anchor_tag                                              = substantive_obj_misc_struct.anchor_tag;
-      comp_obj_                                               = set_object_generic("body", "body", "block", "quote", an_object["substantive"], obj_cite_digits.object_number);
-      comp_obj_.metainfo.identifier                           = obj_cite_digits.identifier;
-      comp_obj_.metainfo.object_number_off                    = obj_cite_digits.off;
-      comp_obj_.metainfo.o_n_book_index                       = obj_cite_digits.bkidx;
-      comp_obj_.metainfo.object_number_type                   = obj_cite_digit_type;
-      comp_obj_.metainfo.lang                                 = an_object["lang"];
-      comp_obj_.metainfo.attrib                               = an_object["attrib"];
-      comp_obj_.tags.html_segment_anchor_tag_is               = tag_in_seg["seg_lv4"];
-      comp_obj_.tags.epub_segment_anchor_tag_is               = tag_in_seg["seg_lv1to4"];
-      comp_obj_.has.inline_notes_reg                          = substantive_obj_misc_struct.has_notes_reg;
-      comp_obj_.has.inline_notes_star                         = substantive_obj_misc_struct.has_notes_star;
-      comp_obj_.has.inline_links                              = substantive_obj_misc_struct.has_links;
-      the_document_body_section                               ~= comp_obj_;
-      tag_assoc                                               = an_object.inline_para_link_anchor(tag_in_seg, tag_assoc);
-      pith["block_is"]                                        = eN.blk_is.quote;
-      pith["block_state"]                                     = eN.blk_state.off;
-      pith["block_delim"]                                     = eN.blk_delim.off;
-      object_reset(an_object);
-      processing.remove("verse");
-      ++cntr;
-    } else if (pith["block_is"] == eN.blk_is.group) {
-      obj_cite_digits = ocn_emit(pith["ocn"]);
-      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_digits,
-          tag_in_seg
-        );
-      an_object["is"]                                         = "group";
-      auto comp_obj_location
-        = node_construct.node_location_emitter(
-          content_non_header,
-          tag_in_seg,
-          lev_anchor_tag,
-          tag_assoc,
-          obj_cite_digits,
-          cntr,
-          heading_ptr-1,
-          an_object["is"]
-        );
-      ST_txtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_struct
-        = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta, No._new_doc);
-      an_object["substantive"]                                = substantive_obj_misc_struct.obj_txt;
-      anchor_tag                                              = substantive_obj_misc_struct.anchor_tag;
-      comp_obj_                                               = set_object_generic("body", "body", "block", "group", an_object["substantive"], obj_cite_digits.object_number);
-      comp_obj_.metainfo.identifier                           = obj_cite_digits.identifier;
-      comp_obj_.metainfo.object_number_off                    = obj_cite_digits.off;
-      comp_obj_.metainfo.o_n_book_index                       = obj_cite_digits.bkidx;
-      comp_obj_.metainfo.object_number_type                   = obj_cite_digits.type;
-      comp_obj_.metainfo.lang                                 = an_object["lang"];
-      comp_obj_.metainfo.attrib                               = an_object["attrib"];
-      comp_obj_.tags.html_segment_anchor_tag_is               = tag_in_seg["seg_lv4"];
-      comp_obj_.tags.epub_segment_anchor_tag_is               = tag_in_seg["seg_lv1to4"];
-      comp_obj_.has.inline_notes_reg                          = substantive_obj_misc_struct.has_notes_reg;
-      comp_obj_.has.inline_notes_star                         = substantive_obj_misc_struct.has_notes_star;
-      comp_obj_.has.inline_links                              = substantive_obj_misc_struct.has_links;
-      the_document_body_section                               ~= comp_obj_;
-      tag_assoc                                               = an_object.inline_para_link_anchor(tag_in_seg, tag_assoc);
-      pith["block_is"]                                        = eN.blk_is.poem;
-      pith["block_state"]                                     = eN.blk_state.off;
-      pith["block_delim"]                                     = eN.blk_delim.off;
-      object_reset(an_object);
-      processing.remove("verse");
-      ++cntr;
-    } else if (pith["block_is"] == eN.blk_is.block) {
-      obj_cite_digits = ocn_emit(pith["ocn"]);
-      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_digits,
-          tag_in_seg
-        );
-      an_object["is"]                                         = "block";
-      auto comp_obj_location
-        = node_construct.node_location_emitter(
-          content_non_header,
-          tag_in_seg,
-          lev_anchor_tag,
-          tag_assoc,
-          obj_cite_digits,
-          cntr,
-          heading_ptr-1,
-          an_object["is"]
-        );
-      ST_txtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_struct
-        = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta, No._new_doc);
-      an_object["substantive"]                                = substantive_obj_misc_struct.obj_txt;
-      // anchor_tag                                           = substantive_obj_misc_struct.anchor_tag; // check
-      comp_obj_                                               = set_object_generic("body", "body", "block", "block", an_object["substantive"], obj_cite_digits.object_number);
-      comp_obj_.metainfo.identifier                           = obj_cite_digits.identifier;
-      comp_obj_.metainfo.object_number_off                    = obj_cite_digits.off;
-      comp_obj_.metainfo.o_n_book_index                       = obj_cite_digits.bkidx;
-      comp_obj_.metainfo.object_number_type                   = obj_cite_digit_type;
-      comp_obj_.metainfo.lang                                 = an_object["lang"];
-      comp_obj_.metainfo.attrib                               = an_object["attrib"];
-      comp_obj_.tags.html_segment_anchor_tag_is               = tag_in_seg["seg_lv4"];
-      comp_obj_.tags.epub_segment_anchor_tag_is               = tag_in_seg["seg_lv1to4"];
-      comp_obj_.has.inline_notes_reg                          = substantive_obj_misc_struct.has_notes_reg;
-      comp_obj_.has.inline_notes_star                         = substantive_obj_misc_struct.has_notes_star;
-      comp_obj_.has.inline_links                              = substantive_obj_misc_struct.has_links;
-      the_document_body_section                               ~= comp_obj_;
-      pith["block_is"]                                        = eN.blk_is.block;
-      pith["block_state"]                                     = eN.blk_state.off;
-      pith["block_delim"]                                     = eN.blk_delim.off;
-      object_reset(an_object);
-      processing.remove("verse");
-      ++cntr;
-    } else if (pith["block_is"] == eN.blk_is.poem) {
-      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_digits,
-          tag_in_seg
-        );
-      an_object["is"]                                         = "verse";
-      auto comp_obj_location
-        = node_construct.node_location_emitter(
-          content_non_header,
-          tag_in_seg,
-          lev_anchor_tag,
-          tag_assoc,
-          obj_cite_digits,
-          cntr,
-          heading_ptr-1,
-          an_object["is"]
-        );
-      comp_obj_poem_ocn                                       = set_object_generic("body", "body", "block", "poem", "", obj_cite_digits.object_number);
-      comp_obj_poem_ocn.metainfo.identifier                   = obj_cite_digits.identifier;
-      comp_obj_poem_ocn.metainfo.object_number_off            = obj_cite_digits.off;
-      comp_obj_poem_ocn.metainfo.o_n_book_index               = obj_cite_digits.bkidx;
-      comp_obj_poem_ocn.metainfo.object_number_type           = obj_cite_digits.type;
-      the_document_body_section                               ~= comp_obj_poem_ocn;
-      pith["block_is"]                                        = eN.blk_is.poem;
-      pith["block_state"]                                     = eN.blk_state.off;
-      pith["block_delim"]                                     = eN.blk_delim.off;
-      object_reset(an_object);
-      processing.remove("verse");
-    } else if (pith["block_is"] == eN.blk_is.code) {
-      obj_cite_digits = ocn_emit(pith["ocn"]);
-      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_digits,
-          tag_in_seg
-        );
-      an_object["is"]                                         = "code";
-      auto comp_obj_location
-        = node_construct.node_location_emitter(
-          content_non_header,
-          tag_in_seg,
-          lev_anchor_tag,
-          tag_assoc,
-          obj_cite_digits,
-          cntr,
-          heading_ptr-1,
-          an_object["is"]
-        );
-      ST_txtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_struct
-        = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta, No._new_doc);
-      an_object["substantive"]                                = substantive_obj_misc_struct.obj_txt;
-      anchor_tag                                              = substantive_obj_misc_struct.anchor_tag;
-      comp_obj_                                               = set_object_generic("body", "body", "block", "code", an_object["substantive"], obj_cite_digits.object_number);
-      comp_obj_.metainfo.identifier                           = obj_cite_digits.identifier;
-      comp_obj_.metainfo.object_number_off                    = obj_cite_digits.off;
-      comp_obj_.metainfo.o_n_book_index                       = obj_cite_digits.bkidx;
-      comp_obj_.metainfo.object_number_type                   = obj_cite_digits.type;
-      comp_obj_.metainfo.syntax                               = an_object["syntax"];
-      comp_obj_.metainfo.attrib                               = an_object["attrib"];
-      comp_obj_.code_block.linenumbers                        = (an_object["attrib"].match(rgx.code_numbering)) ? true : false;
-      comp_obj_.tags.html_segment_anchor_tag_is               = tag_in_seg["seg_lv4"];
-      comp_obj_.tags.epub_segment_anchor_tag_is               = tag_in_seg["seg_lv1to4"];
-      comp_obj_.has.inline_notes_reg                          = substantive_obj_misc_struct.has_notes_reg;
-      comp_obj_.has.inline_notes_star                         = substantive_obj_misc_struct.has_notes_star;
-      comp_obj_.has.inline_links                              = substantive_obj_misc_struct.has_links;
-      the_document_body_section                               ~= comp_obj_;
-      pith["block_is"]                                        = eN.blk_is.code;
-      pith["block_state"]                                     = eN.blk_state.off;
-      pith["block_delim"]                                     = eN.blk_delim.off;
-      object_reset(an_object);
-      processing.remove("verse");
-      ++cntr;
-    } else if (pith["block_is"]    == eN.blk_is.table) {
-      comp_obj_ = comp_obj_.init;
-      obj_cite_digits = ocn_emit(pith["ocn"]);
-      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_digits,
-          tag_in_seg
-        );
-      an_object["is"]                                         = "table";
-      auto comp_obj_location
-        = node_construct.node_location_emitter(
-          content_non_header,
-          tag_in_seg,
-          lev_anchor_tag,
-          tag_assoc,
-          obj_cite_digits,
-          cntr,
-          heading_ptr-1,
-          an_object["is"]
-        );
-      ST_txtAndAnchorTagPlusHasFootnotesUrlsImages substantive_obj_misc_struct
-        = obj_im.obj_inline_markup_and_anchor_tags_and_misc(an_object, an_object_key, conf_make_meta, No._new_doc);
-      an_object["substantive"]                                = substantive_obj_misc_struct.obj_txt;
-      comp_obj_                                               = comp_obj_.init;
-      comp_obj_.metainfo.ocn                                  = obj_cite_digits.object_number;
-      comp_obj_.metainfo.identifier                           = obj_cite_digits.identifier;
-      comp_obj_.metainfo.object_number_off                    = obj_cite_digits.off;
-      comp_obj_.tags.html_segment_anchor_tag_is               = tag_in_seg["seg_lv4"];
-      comp_obj_.tags.epub_segment_anchor_tag_is               = tag_in_seg["seg_lv1to4"];
-      comp_obj_.metainfo.o_n_book_index                       = obj_cite_digits.bkidx;
-      comp_obj_.metainfo.object_number_type                   = obj_cite_digits.type;
-      comp_obj_                                               = comp_obj_.flow_table_instructions(an_object["table_head"]);
-      {
-        auto _get = comp_obj_.flow_table_substantive_munge(an_object["substantive"]);
-        {
-          comp_obj_           = _get.table_object;
-          an_object["substantive"] = _get.table_substantive;
-        }
-      }
-      the_document_body_section                               ~= comp_obj_;
-      pith["block_is"]                                        = eN.blk_is.table;
-      pith["block_state"]                                     = eN.blk_state.off;
-      pith["block_delim"]                                     = eN.blk_delim.off;
-      object_reset(an_object);
-      processing.remove("verse");
-      ++cntr;
-    }
-  }
-  ST_flow_block_flag_line_empty ret;
-  {
-    ret.this_object                = an_object;
-    ret.the_document_body_section  = the_document_body_section;
-    ret.bookindex_unordered_hashes = bookindex_unordered_hashes;
-    ret.obj_cite_digits            = obj_cite_digits;
-    ret.comp_obj_                  = comp_obj_; //
-    ret.cntr                       = cntr;
-    ret.pith                       = pith;
-  }
-  return ret;
-}
-@system ST_flow_book_index flow_book_index_(B)(
-  char[]          line,
-  string[string]  an_object,
-  string          book_idx_tmp,
-  uint[string]    pith,
-  B               opt_action,
-) {
-  static auto rgx = RgxI();
-  if (auto m = line.match(rgx.book_index_item)) {                                   // match book_index
-    debug(bookindexmatch) { writefln(
-        "* [bookindex] %s\n",
-        m["bookindex"].to!string,
-      );
-    }
-    an_object["bookindex_nugget"] = m.captures[1].to!string;
-  } else if (auto m = line.match(rgx.book_index_item_open))  {                      // match open book_index
-    pith["section"] = eN.sect.book_index;
-    if (opt_action.backmatter && opt_action.section_bookindex) {
-      book_idx_tmp = m.captures[1].to!string;
-      debug(bookindexmatch) { writefln( "* [bookindex] %s\n", book_idx_tmp,); }
-    }
-  } else if (pith["section"] == eN.sect.book_index)  {                    // book_index flag set
-    if (auto m = line.match(rgx.book_index_item_close))  {
-      pith["section"] = eN.sect.unset;
-      if (opt_action.backmatter
-      && opt_action.section_bookindex) {
-        an_object["bookindex_nugget"] = book_idx_tmp ~ m.captures[1].to!string;
-        debug(bookindexmatch) { writefln( "* [bookindex] %s\n", book_idx_tmp,); }
-      }
-      book_idx_tmp = "";
-    } else {
-      if (opt_action.backmatter
-      && opt_action.section_bookindex) {
-        book_idx_tmp ~= line;
-      }
-    }
-  }
-  ST_flow_book_index ret;
-  {
-    ret.this_object    = an_object;
-    ret.pith           = pith;
-    ret.book_idx_tmp   = book_idx_tmp;
-  }
-  return ret;
-}
-@safe ST_flow_heading_found flow_heading_found_()(
-  char[]                line,
-  string[string]        heading_match_str,
-  string[]              _make_unmarked_headings,
-  Regex!(char)[string]  heading_match_rgx,
-  uint[string]          pith,
-) {
-  static auto rgx = RgxI();
-  if ((_make_unmarked_headings.length > 2)
-  && (pith["make_headings"] == eN.bi.off)) {                        // headings found
-    debug(headingsfound) { writeln(_make_unmarked_headings); }
-    debug(headingsfound) {
-      writeln(_make_unmarked_headings.length);
-      writeln(_make_unmarked_headings);
-    }
-    switch (_make_unmarked_headings.length) {
-    case 7 :
-      if (!empty(_make_unmarked_headings[6])) {
-        heading_match_str["h_4"]
-          = "^(" ~ _make_unmarked_headings[6].to!string ~ ")";
-        heading_match_rgx["h_4"]
-          = regex(heading_match_str["h_4"]);
-      }
-      goto case;
-    case 6 :
-      if (!empty(_make_unmarked_headings[5])) {
-        heading_match_str["h_3"]
-          = "^(" ~ _make_unmarked_headings[5].to!string ~ ")";
-        heading_match_rgx["h_3"]
-          = regex(heading_match_str["h_3"]);
-      }
-      goto case;
-    case 5 :
-      if (!empty(_make_unmarked_headings[4])) {
-        heading_match_str["h_2"]
-          = "^(" ~ _make_unmarked_headings[4].to!string ~ ")";
-        heading_match_rgx["h_2"]
-          = regex(heading_match_str["h_2"]);
-      }
-      goto case;
-    case 4 :
-      if (!empty(_make_unmarked_headings[3])) {
-        heading_match_str["h_1"]
-          = "^(" ~ _make_unmarked_headings[3].to!string ~ ")";
-        heading_match_rgx["h_1"]
-          = regex(heading_match_str["h_1"]);
-      }
-      goto case;
-    case 3 :
-      if (!empty(_make_unmarked_headings[2])) {
-        heading_match_str["h_D"]
-          = "^(" ~ _make_unmarked_headings[2].to!string ~ ")";
-        heading_match_rgx["h_D"]
-          = regex(heading_match_str["h_D"]);
-      }
-      goto case;
-    case 2 :
-      if (!empty(_make_unmarked_headings[1])) {
-        heading_match_str["h_C"]
-          = "^(" ~ _make_unmarked_headings[1].to!string ~ ")";
-        heading_match_rgx["h_C"]
-          = regex(heading_match_str["h_C"]);
-      }
-      goto case;
-    case 1 :
-      if (!empty(_make_unmarked_headings[0])) {
-        heading_match_str["h_B"]
-          = "^(" ~ _make_unmarked_headings[0].to!string ~ ")";
-        heading_match_rgx["h_B"]
-          = regex(heading_match_str["h_B"]);
-      }
-      break;
-    default:
-      break;
-    }
-    pith["make_headings"] = eN.bi.on;
-  }
-  ST_flow_heading_found ret;
-  {
-    ret.heading_match_str = heading_match_str;
-    ret.heading_match_rgx = heading_match_rgx;
-    ret.pith              = pith;
-  }
-  return ret;
-}
-@safe ST_flow_heading_make_set flow_heading_make_set_()(
-             char[]                line,
-             int[string]           line_occur,
-  return ref Regex!(char)[string]  heading_match_rgx,
-  return ref uint[string]          pith,
-) {
-  if (pith["make_headings"] == eN.bi.on
-    && (line_occur["para"] == eN.bi.off
-    && line_occur["heading"] == eN.bi.off)
-    && pith["txt_is"] == eN.txt_is.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); }
-    }
-  }
-  ST_flow_heading_make_set ret;
-  {
-    ret.line           = line;
-    ret.pith           = pith;
-    ret.this_object    = an_object;
-  }
-  return ret;
-}
-@safe auto flow_heading_matched_(CMM)(
-  char[]          line,
-  string[string]  an_object,
-  int[string]     line_occur,
-  string          an_object_key,
-  int[string]     lv,
-  int[string]     collapsed_lev,
-  uint[string]    pith,
-  CMM             conf_make_meta,
-) {
-  static auto rgx = RgxI();
-  static auto mkup = InlineMarkup();
-  if (auto m = line.match(rgx.headings)) {                                      // heading match
-    ++line_occur["heading"];
-    pith["txt_is"]           = eN.txt_is.heading;
-    if (line.match(rgx.heading_seg_and_above)) {
-      pith["section"]        = eN.sect.unset;
-    }
-    an_object[an_object_key] ~= line ~= "\n";
-    an_object["lev"] ~= m.captures[1];
-    assertions_doc_structure(an_object, an_object_key, lv); // includes most of the logic for collapsed levels
-    switch (an_object["lev"]) {
-    case "A":                                // Title set
-      if ((an_object[an_object_key].match(rgx.variable_doc_title_author_date))
-      || (an_object[an_object_key].match(rgx.variable_doc_title)
-      && an_object[an_object_key].match(rgx.variable_doc_author)
-      && an_object[an_object_key].match(rgx.variable_doc_date))) {
-        an_object[an_object_key] = an_object[an_object_key]
-          .replaceFirst(rgx.variable_doc_title_author_date,
-            (conf_make_meta.meta.title_full
-            ~ mkup.br_line_inline
-            ~ conf_make_meta.meta.creator_author
-            ~ " (" ~ (conf_make_meta.meta.date_published.replaceFirst(regex(r"(?:-00)+"),"")) ~ ")"))
-          .replaceFirst(rgx.variable_doc_title,
-            (conf_make_meta.meta.title_full ~ mkup.br_line_inline))
-          .replaceFirst(rgx.variable_doc_author,
-            conf_make_meta.meta.creator_author)
-          .replaceFirst(rgx.variable_doc_date,
-            " (" ~ (conf_make_meta.meta.date_published.replaceFirst(regex(r"(?:-00)+"),"")) ~ ")");
-      } else if ((an_object[an_object_key].match(rgx.variable_doc_title_author))
-      || (an_object[an_object_key].match(rgx.variable_doc_title)
-      && an_object[an_object_key].match(rgx.variable_doc_author))) {
-        an_object[an_object_key] = an_object[an_object_key]
-          .replaceFirst(rgx.variable_doc_title_author_date,
-            (conf_make_meta.meta.title_full
-            ~ mkup.br_line_inline
-            ~ conf_make_meta.meta.creator_author))
-          .replaceFirst(rgx.variable_doc_title,
-            (conf_make_meta.meta.title_full ~ mkup.br_line_inline))
-          .replaceFirst(rgx.variable_doc_author,
-            conf_make_meta.meta.creator_author);
-      } else if (an_object[an_object_key].match(rgx.variable_doc_title)) {
-        an_object[an_object_key] = an_object[an_object_key]
-          .replaceFirst(rgx.variable_doc_title,
-            conf_make_meta.meta.title_full);
-      }
-      collapsed_lev["h0"] = 0;
-      an_object["lev_collapsed_number"]
-        = collapsed_lev["h0"].to!string;
-      lv["lv"] = DocStructMarkupHeading.h_sect_A;
-      ++lv["h0"];
-      lv["h1"] = eN.bi.off;
-      lv["h2"] = eN.bi.off;
-      lv["h3"] = eN.bi.off;
-      lv["h4"] = eN.bi.off;
-      lv["h5"] = eN.bi.off;
-      lv["h6"] = eN.bi.off;
-      lv["h7"] = eN.bi.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"] = eN.bi.off;
-      lv["h3"] = eN.bi.off;
-      lv["h4"] = eN.bi.off;
-      lv["h5"] = eN.bi.off;
-      lv["h6"] = eN.bi.off;
-      lv["h7"] = eN.bi.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"] = eN.bi.off;
-      lv["h4"] = eN.bi.off;
-      lv["h5"] = eN.bi.off;
-      lv["h6"] = eN.bi.off;
-      lv["h7"] = eN.bi.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"] = eN.bi.off;
-      lv["h5"] = eN.bi.off;
-      lv["h6"] = eN.bi.off;
-      lv["h7"] = eN.bi.off;
-      goto default;
-    case "1":
-      if (lv["h3"] > eN.bi.off) {
-        collapsed_lev["h4"] = collapsed_lev["h3"] + 1;
-      } else if (lv["h2"] > eN.bi.off) {
-        collapsed_lev["h4"] = collapsed_lev["h2"] + 1;
-      } else if (lv["h1"] > eN.bi.off) {
-        collapsed_lev["h4"] = collapsed_lev["h1"] + 1;
-      } else if (lv["h0"] > eN.bi.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"] = eN.bi.off;
-      lv["h6"] = eN.bi.off;
-      lv["h7"] = eN.bi.off;
-      goto default;
-    case "2":
-      if (lv["h5"] > eN.bi.off) {
-        an_object["lev_collapsed_number"]
-          = collapsed_lev["h5"].to!string;
-      } else if (lv["h4"] > eN.bi.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"] = eN.bi.off;
-      lv["h7"] = eN.bi.off;
-      goto default;
-    case "3":
-      if (lv["h6"] > eN.bi.off) {
-        an_object["lev_collapsed_number"]
-          = collapsed_lev["h6"].to!string;
-      } else if (lv["h5"] > eN.bi.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"] = eN.bi.off;
-      goto default;
-    case "4":
-      if (lv["h7"] > eN.bi.off) {
-        an_object["lev_collapsed_number"]
-          = collapsed_lev["h7"].to!string;
-      } else if (lv["h6"] > eN.bi.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;
-    }
-    an_object["dummy_heading_status"] = (pith["dummy_heading_status"] == eN.bi.off) ? "f" : "t";
-    debug(heading) { writeln(line.strip); }
-  }
-  struct ST_flow_heading_matched {
-    string[string]  this_object;
-    int[string]     line_occur;
-    string          an_object_key;
-    int[string]     lv;
-    int[string]     collapsed_lev;
-    uint[string]    pith;
-    CMM             conf_make_meta;
-  }
-  ST_flow_heading_matched ret;
-  {
-    ret.this_object    = an_object;
-    ret.line_occur     = line_occur;
-    ret.an_object_key  = an_object_key;
-    ret.lv             = lv;
-    ret.collapsed_lev  = collapsed_lev;
-    ret.pith           = pith;
-    ret.conf_make_meta = conf_make_meta;
-  }
-  return ret;
-}
-@safe ST_flow_para_match flow_para_match_()(
-  char[]         line,
-  string[string]  an_object,
-  string          an_object_key,
-  int[string]     indent,
-  bool            bullet,
-  uint[string]    pith,
-  int[string]     line_occur,
-) {
-  static auto rgx = RgxI();
-  if (line_occur["para"] == eN.bi.off) {
-    line = font_faces_line(line);
-    // para matches
-    pith["txt_is"]           = eN.txt_is.para;
-    an_object[an_object_key] ~= line;
-    indent = [
-      "hang_position" : 0,
-      "base_position" : 0,
-    ];
-    bullet = false;
-    if (auto m = line.matchFirst(rgx.para_indent)) {
-      debug(paraindent) { writeln(line); }
-      indent["hang_position"] = (m["indent"]).to!int;
-      indent["base_position"] = (m["indent"]).to!int;
-    } else if (line.matchFirst(rgx.para_bullet)) {
-      debug(parabullet) { writeln(line); }
-      bullet = true;
-    } else if (auto m = line.matchFirst(rgx.para_indent_hang)) {
-      debug(paraindenthang) { writeln(line); }
-      indent = [
-        "hang_position" : (m["hang"]).to!int,
-        "base_position" : (m["indent"]).to!int,
-      ];
-    } else if (auto m = line.matchFirst(rgx.para_bullet_indent)) {
-      debug(parabulletindent) { writeln(line); }
-      indent = [
-        "hang_position" : (m["indent"]).to!int,
-        "base_position" : (m["indent"]).to!int,
-      ];
-      bullet = true;
-    }
-    ++line_occur["para"];
-  }
-  ST_flow_para_match ret;
-  {
-    ret.pith            = pith;
-    ret.this_object     = an_object;
-    ret.this_object_key = an_object_key;
-    ret.indent          = indent;
-    ret.bullet          = bullet;
-    ret.line_occur      = line_occur;
-  }
-  return ret;
-}
-@safe char[] font_faces_line()(
-  char[]  textline,
-) {
-  static auto rgx = RgxI();
-  static auto mkup = InlineMarkup();
-  if (textline.match(rgx.inline_faces_line)) {
-    textline = textline
-      .replaceFirst(rgx.inline_emphasis_line,
-        format(q"┃%s%s%s%s%s%s%s┃",
-          mkup.ff_i, mkup.emph, mkup.ff_o, "$1", mkup.ff_c, mkup.emph, "$2"))
-      .replaceFirst(rgx.inline_bold_line,
-        format(q"┃%s%s%s%s%s%s%s┃",
-          mkup.ff_i, mkup.bold, mkup.ff_o, "$1", mkup.ff_c, mkup.bold, "$2"))
-      .replaceFirst(rgx.inline_underscore_line,
-        format(q"┃%s%s%s%s%s%s%s┃",
-          mkup.ff_i, mkup.underscore, mkup.ff_o, "$1", mkup.ff_c, mkup.underscore, "$2"))
-      .replaceFirst(rgx.inline_italics_line,
-        format(q"┃%s%s%s%s%s%s%s┃",
-          mkup.ff_i, mkup.italic,  mkup.ff_o, "$1", mkup.ff_c, mkup.italic, "$2"));
-  }
-  return textline;
-}
-@safe ObjGenericComposite flow_table_instructions(H)(
-  ObjGenericComposite  table_object,
-  H                    table_head,
-) {
-  static auto rgx = RgxI();
-  table_object.metainfo.is_of_part        = "body";
-  table_object.metainfo.is_of_section     = "body";
-  table_object.metainfo.is_of_type        = "block";
-  table_object.metainfo.is_a              = "table";
-  table_object.has.inline_notes_reg       = false;
-  table_object.has.inline_notes_star      = false;
-  table_object.has.inline_links           = false;
-  if (auto m = table_head.matchFirst(rgx.table_head_instructions)) {
-    table_object.table.heading
-      = ((m["c_heading"].length > 0) && (m["c_heading"] == "h")) ? true : false;
-    table_object.table.number_of_columns
-      = ((m["c_num"].length > 0) && (m["c_num"].to!int > 0)) ? m["c_num"].to!int : 0;
-    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;
-}
-@safe ST_flow_table_array_munge flow_table_array_munge()(
-  ObjGenericComposite  table_object,
-  string[][]           table_array,
-) {
-  static auto rgx = RgxI();
-  static 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 && table_object.table.heading) {
-      } else if (col.match(rgx.numeric_col) && idx_r == 1) { // conditions reversed to avoid: gdc compiled program run segfault
-        if ((table_object.table.column_aligns.length > idx_c)
-        && (table_object.table.column_aligns[idx_c].matchFirst(rgx.table_col_align_match))) {
-          table_object.table.column_aligns[idx_c] = table_object.table.column_aligns[idx_c];
-        } else if (table_object.table.column_aligns.length > idx_c) {
-          table_object.table.column_aligns[idx_c] = "r";
-        } else {
-          table_object.table.column_aligns ~= "r";
-        }
-      } else if (idx_r == 1) {
-        if ((table_object.table.column_aligns.length > idx_c)
-        && (table_object.table.column_aligns[idx_c].matchFirst(rgx.table_col_align_match))) {
-          table_object.table.column_aligns[idx_c] = table_object.table.column_aligns[idx_c];
-        } else if (table_object.table.column_aligns.length > idx_c) {
-          table_object.table.column_aligns[idx_c] = "l";
-        } else {
-          table_object.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 (table_object.table.number_of_columns != col_num) {
-    if (table_object.table.number_of_columns == 0) {
-      table_object.table.number_of_columns = (col_num).to!int;
-    } else {
-      debug(table_dev) { writeln(table_object.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: ", table_object.table.column_aligns, "\n",
-      "no. of columns: ", table_object.table.number_of_columns, "\n",
-      "col widths: ", table_object.table.column_widths,
-        " sum: ", table_object.table.column_widths.sum, "\n",
-      _table_substantive);
-  }
-  table_object.text = _table_substantive;
-  ST_flow_table_array_munge ret;
-  {
-    ret.table_object      = table_object;
-    ret.table_array       = table_array;
-  }
-  return ret;
-}
-@system ST_flow_table_substantive_munge flow_table_substantive_munge()(
-  ObjGenericComposite  table_object,
-  string               table_substantive,
-) {
-  static auto rgx = RgxI();
-  static auto munge = ObjInlineMarkupMunge();
-  string[] _table_rows = (table_substantive).split(rgx.table_row_delimiter);
-  string[] _table_cols;
-  string[][] _table_array;
-  foreach(col; _table_rows) {
-    _table_cols = col.split(rgx.table_col_delimiter);
-    _table_array ~= _table_cols;
-  }
-  {
-    auto _get = table_object.flow_table_array_munge(_table_array);
-    {
-      table_object = _get.table_object;
-      _table_array = _get.table_array; // what do you do with this? how is this passed down?
-    }
-  }
-  ST_flow_table_substantive_munge ret;
-  {
-    ret.table_object      = table_object;
-    ret.table_substantive = table_substantive; // has anything been changed here?
-  }
-  return ret;
-}
-@system ST_flow_table_substantive_munge flow_table_substantive_munge_special()(
-  ObjGenericComposite  table_object,
-  string               table_substantive,
-) {
-  static auto rgx = RgxI();
-  static auto munge = ObjInlineMarkupMunge();
-  string[] _table_rows = (table_substantive).split(rgx.table_row_delimiter_special);
-  string[] _table_cols;
-  string[][] _table_array;
-  foreach(col; _table_rows) {
-    _table_cols = col.split(rgx.table_col_delimiter_special);
-    _table_array ~= _table_cols;
-  }
-  {
-    auto _get = table_object.flow_table_array_munge(_table_array);
-    {
-      table_object = _get.table_object;
-      _table_array = _get.table_array;
-    }
-  }
-  ST_flow_table_substantive_munge ret;
-  {
-    ret.table_object      = table_object;
-    ret.table_substantive = table_substantive;
-  }
-  return ret;
-}
-// abstraction functions ↑
-// ↓ abstraction function emitters
-@safe pure struct OCNemitter {
-  int ocn_digit, ocn_object_number, ocn_on_, ocn_off_, ocn_bkidx, ocn_bkidx_;
-  string object_identifier;
-  bool ocn_is_off;
-  @safe auto ocn_emitter(int ocn_status_flag) {
-    OCNset ocn;
-    assert(ocn_status_flag <= eN.ocn.reset);
-    ocn_object_number              = ocn_bkidx = 0;
-    object_identifier              = "";
-    ocn_is_off                     = false;
-    switch(ocn_status_flag) with (eN.ocn) {
-    case reset:
-      ocn_digit                    = ocn_on_             = 1;
-      object_identifier            = "1";
-      ocn_is_off                   = false;
-      ocn_off_                     = ocn_bkidx_ = 0;
-      break;
-    case on:
-      ocn_digit                    = ocn_object_number   = ++ocn_on_;
-      object_identifier            = ocn_digit.to!string;
-      ocn_is_off                   = false;
-      break;
-    case off:
-      ocn_digit                    = 0;
-      ocn_off_                     = ++ocn_off_;
-      object_identifier            = "a" ~ ocn_off_.to!string;
-      ocn_is_off                   = true;
-      break;
-    case bkidx:
-      ocn_bkidx                    = ++ocn_bkidx_;
-      break;
-    case closing: // unused?
-      break;
-    default:
-      ocn_digit                    = 0;
-    }
-    assert(ocn_digit >= 0);
-    ocn.digit                      = ocn_digit;
-    ocn.object_number              = ocn_object_number; // difference between .object_number and .digit?
-    ocn.identifier                 = object_identifier;
-    ocn.off                        = ocn_is_off;
-    ocn.bkidx                      = ocn_bkidx;
-    ocn.type                       = ocn_status_flag;
-    return ocn;
-  }
-  invariant() {
-  }
-}
-@safe ObjGenericComposite set_object_heading()(
-  string level,
-  string part,
-  string section,
-  string text,
-) {
-  ObjGenericComposite comp_obj;
-  comp_obj                                                = comp_obj.init;
-  comp_obj.metainfo.is_of_part                            = part;
-  comp_obj.metainfo.is_of_section                         = section;
-  comp_obj.metainfo.is_of_type                            = "para";
-  comp_obj.metainfo.is_a                                  = "heading";
-  comp_obj.text                                           = text;
-  comp_obj.metainfo.ocn                                   = 0;
-  if (level == "lev1") {
-    comp_obj.metainfo.heading_lev_markup                  = 1;
-    comp_obj.metainfo.heading_lev_collapsed               = 1;
-    comp_obj.metainfo.parent_ocn                          = 1;
-    comp_obj.metainfo.parent_lev_markup                   = 0;
-  } else if (level == "lev4") {
-    comp_obj.metainfo.heading_lev_markup                  = 4;
-    comp_obj.metainfo.heading_lev_collapsed               = 1;
-    comp_obj.metainfo.parent_ocn                          = 1;
-    comp_obj.metainfo.parent_lev_markup                   = 0;
-    comp_obj.metainfo.dom_structure_markedup_tags_status  = [ 1, 1, 0, 0, 1, 0, 0, 0]; // KEEP
-    comp_obj.metainfo.dom_structure_collapsed_tags_status = [ 1, 1, 1, 0, 0, 0, 0, 0]; // KEEP
-  }
-  return comp_obj;
-}
-@safe ObjGenericComposite set_object_generic()(
-  string part,
-  string section,
-  string type,
-  string is_a,
-  string text,
-  int ocn,
-) {
-  ObjGenericComposite comp_obj;
-  comp_obj                                                = comp_obj.init;
-  comp_obj.metainfo.is_of_part                            = part;
-  comp_obj.metainfo.is_of_section                         = section;
-  comp_obj.metainfo.is_of_type                            = type;
-  comp_obj.metainfo.is_a                                  = is_a;
-  comp_obj.text                                           = text;
-  comp_obj.metainfo.ocn                                   = ocn;
-  return comp_obj;
-}
-@safe static struct ObjInlineMarkupMunge {
-  string[string] obj_txt;
-  int n_foot, n_foot_reg, n_foot_sp_asterisk, n_foot_sp_plus;
-  string asterisks_, plus_;
-  string obj_txt_out, tail, note;
-  static auto rgx = RgxI();
-  static 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;
-  }
-  @safe static auto images()(string obj_txt_in) {
-    static auto mng = InlineMarkup();
-    // url matched
-    obj_txt_in = obj_txt_in.replaceAll(rgx.inline_notes_al_special, ""); // TODO reinstate when special footnotes are implemented
-    if (obj_txt_in.match(rgx.smid_image_generic)) {                            // images with and without links
-      debug(images) { writeln("Image: ", obj_txt_in); }
-      if (obj_txt_in.match(rgx.smid_image_with_dimensions)) {
-        obj_txt_in = obj_txt_in
-          .replaceAll(rgx.smid_image_with_dimensions, ("$1" ~ mkup.img ~ "$2,w$3h$4 " ~ "$5"))
-          .replaceAll(rgx.smid_image_delimit, ("$1"
-            ~ mkup.lnk_o ~ "$2".strip ~ mkup.lnk_c
-            ~ mkup.url_o ~ mkup.url_c));
-        debug(images) { writeln("IMAGE with size: ", obj_txt_in); }
-      } else if (obj_txt_in.match(rgx.smid_image)) {
-        obj_txt_in = obj_txt_in
-          .replaceAll(rgx.smid_image, ("$1" ~ mkup.img ~ "$2,w0h0" ~ "$3"))
-          .replaceAll(rgx.smid_image_delimit, ("$1"
-            ~ mkup.lnk_o ~ "$2".strip ~ mkup.lnk_c
-            ~ mkup.url_o ~ mkup.url_c));
-        debug(images) { writeln("IMAGE: ", obj_txt_in); } // decide on representation
-      }
-    }
-    return obj_txt_in;
-  }
-  @safe ST_txtPlusHasFootnotes footnotes_endnotes_markup_and_number_or_stars()(string obj_txt_in, bool reset_note_numbers) {
-    // endnotes (regular)
-    bool flg_notes_reg  = false;
-    bool flg_notes_star = false;
-    bool flg_notes_plus = 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;
-    }
-    obj_txt_out = "";
-    if (obj_txt_in.match(rgx.inline_notes_al_gen)) {
-      string[] _tmp_txt;
-      foreach (x; obj_txt_in.split("\n")) {
-        if (auto m = x.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;
-              _tmp_txt ~= n.hit.to!string.replaceFirst(
-                rgx.inline_al_delimiter_open_symbol_star,
-                (mkup.en_a_o ~ replicate(asterisks_, n_foot_sp_asterisk) ~ " ")
-              );
-            } else if (n.hit.to!string.match(rgx.inline_al_delimiter_open_symbol_plus)) {
-              flg_notes_plus =  true;
-              ++n_foot_sp_plus;
-              plus_ = "*";
-              n_foot = n_foot_sp_plus;
-              _tmp_txt ~= n.hit.to!string.replaceFirst(
-                rgx.inline_al_delimiter_open_symbol_plus,
-                (mkup.en_a_o ~ replicate(plus_, n_foot_sp_plus) ~ " ")
-              );
-            } else if (n.hit.to!string.matchFirst(rgx.inline_al_delimiter_open_regular)) {
-              string _tmp_str = n.hit.to!string;
-              flg_notes_reg =  true;
-              foreach (q; n.hit.to!string.matchAll(rgx.inline_al_delimiter_open_regular)) {
-                ++n_foot_reg;
-                n_foot = n_foot_reg;
-                _tmp_str = replaceFirst!(m => mkup.en_a_o ~ n_foot.to!string ~ " ")
-                  (_tmp_str, rgx.inline_al_delimiter_open_regular);
-              }
-              _tmp_txt ~= _tmp_str;
-            } else {
-              _tmp_txt ~= n.hit.to!string;
-            }
-          }
-          obj_txt_out = _tmp_txt.join("\n");
-        }
-      }
-    } else {
-      obj_txt_out = obj_txt_in;
-    }
-    ST_txtPlusHasFootnotes ret;
-    {
-      ret.obj_txt            = obj_txt_out;
-      ret.has_notes_reg      = flg_notes_reg;
-      ret.has_notes_star     = flg_notes_star;
-      ret.has_notes_plus     = flg_notes_plus;
-    }
-    return ret;
-  }
-  @safe private ST_txtPlusHasFootnotesUrlsImages object_notes_and_links_()(
-    string obj_txt_in,
-    bool reset_note_numbers = false
-  ) {
-    obj_txt_out = "";
-    bool urls = false;
-    bool images_without_dimensions = 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)
-      );
-    // image matched
-    if (obj_txt_in.match(rgx.smid_image_generic)) {
-      obj_txt_in = images(obj_txt_in);
-      if (obj_txt_in.match(rgx.smid_mod_image_without_dimensions)) {
-        images_without_dimensions = true;
-      }
-    }
-    // url matched
-    if (obj_txt_in.match(rgx.smid_inline_url)) {
-      urls = true;
-      obj_txt_in = obj_txt_in.links_and_images;
-    }
-    if (auto m = obj_txt_in.match(rgx.para_inline_link_anchor)) {
-      obj_txt_in = obj_txt_in
-        .replaceAll(rgx.para_inline_link_anchor, "┃$1┃");
-    }
-    ST_txtPlusHasFootnotes ftn = footnotes_endnotes_markup_and_number_or_stars(obj_txt_in, reset_note_numbers);
-    obj_txt_out = ftn.obj_txt;
-    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[1]);
-        writeln(m.hit);
-      }
-    }
-    ST_txtPlusHasFootnotesUrlsImages ret;
-    {
-      ret.obj_txt                       = obj_txt_out;
-      ret.has_notes_reg                 = ftn.has_notes_reg;
-      ret.has_notes_star                = ftn.has_notes_star;
-      ret.has_notes_plus                = ftn.has_notes_plus;
-      ret.has_urls                      = urls;
-      ret.has_images_without_dimensions = images_without_dimensions;
-    }
-    return ret;
-  }
-  @safe private ST_txtPlusHasFootnotesUrlsImages object_only_()(
-    string obj_txt_in,
-    bool reset_note_numbers = false
-  ) {
-    ST_txtPlusHasFootnotesUrlsImages ret;
-    {
-      ret.obj_txt                       = obj_txt_in;
-      ret.has_notes_reg                 = false;
-      ret.has_notes_star                = false;
-      ret.has_notes_plus                = false;
-      ret.has_urls                      = false;
-      ret.has_images_without_dimensions = false;
-    }
-    return ret;
-  }
-  ST_txtPlusHasFootnotesUrlsImages init() {
-    ST_txtPlusHasFootnotesUrlsImages ret = object_notes_and_links_("");
-    return ret;
-  }
-  invariant() {
-  }
-  @safe ST_txtPlusHasFootnotesUrlsImages munge_heading()(
-    string obj_txt_in,
-    bool reset_note_numbers = false
-  ) {
-    obj_txt["munge"] = obj_txt_in
-     .replaceFirst(rgx.headings, "")
-     .replaceFirst(rgx.object_number_off_all, "")
-     .replaceFirst(rgx.markup_inline_linebreak, mkup.br_line_inline)
-     .strip;
-    ST_txtPlusHasFootnotesUrlsImages ret = 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 ret;
-  }
-  invariant() {
-  }
-  @safe ST_txtPlusHasFootnotesUrlsImages munge_para()(string obj_txt_in) {
-    obj_txt["munge"] = (obj_txt_in)
-      .replaceFirst(rgx.para_attribs, "")
-      .replaceFirst(rgx.object_number_off_all, "")
-      .replaceFirst(rgx.markup_inline_linebreak, mkup.br_line_inline);
-    ST_txtPlusHasFootnotesUrlsImages ret = object_notes_and_links_(obj_txt["munge"]);
-    debug(munge) { writeln(__LINE__); writeln(obj_txt_in);
-      writeln(__LINE__);
-      writeln(obj_txt["munge"].to!string);
-    }
-    return ret;
-  }
-  @safe ST_txtPlusHasFootnotesUrlsImages munge_quote()(string obj_txt_in) {
-    ST_txtPlusHasFootnotesUrlsImages ret = object_notes_and_links_(obj_txt_in.split("\n\n").join(" \\\\\n \\\\\n"));
-    return ret;
-  }
-  invariant() {
-  }
-  @safe ST_txtPlusHasFootnotesUrlsImages munge_group(string obj_txt_in) {
-    ST_txtPlusHasFootnotesUrlsImages ret = object_notes_and_links_(obj_txt_in.split("\n\n").join("\n" ~ mkup.br_line_spaced ~ "\n"));
-    return ret;
-  }
-  invariant() {
-  }
-  @safe ST_txtPlusHasFootnotesUrlsImages munge_block()(string obj_txt_in) {
-    ST_txtPlusHasFootnotesUrlsImages ret = object_notes_and_links_(obj_txt_in);
-    return ret;
-  }
-  invariant() {
-  }
-  @safe auto munge_verse()(string obj_txt_in) {
-    ST_txtPlusHasFootnotesUrlsImages ret = object_notes_and_links_(obj_txt_in);
-    return ret;
-  }
-  invariant() {
-  }
-  @safe ST_txtPlusHasFootnotesUrlsImages munge_code()(string obj_txt_in) {
-    obj_txt_in = obj_txt_in.replaceAll(rgx.space, mkup.nbsp);
-    ST_txtPlusHasFootnotesUrlsImages ret = object_only_(obj_txt_in);
-    return ret;
-  }
-  invariant() {
-  }
-  @safe ST_txtPlusHasFootnotesUrlsImages munge_table()(string obj_txt_in) {
-    ST_txtPlusHasFootnotesUrlsImages ret = object_notes_and_links_(obj_txt_in);
-    return ret;
-  }
-  invariant() {
-  }
-  @safe ST_txtPlusHasFootnotesUrlsImages munge_comment()(string obj_txt_in) {
-    ST_txtPlusHasFootnotesUrlsImages ret = object_only_(obj_txt_in);
-    return ret;
-  }
-  invariant() {
-  }
-}
-static struct ObjInlineMarkup {
-  static auto rgx = RgxI();
-  static auto munge = ObjInlineMarkupMunge();
-  string[string] obj_txt;
-  string anchor_tag = "";
-  @safe ST_txtAndAnchorTagPlusHasFootnotesUrlsImages obj_inline_markup_and_anchor_tags_and_misc(CMM)(
-    string[string]   obj_,
-    string           obj_key_,
-    CMM              conf_make_meta,
-    Flag!"_new_doc"  _new_doc
-  ) {
-    obj_txt["munge"]                                = obj_[obj_key_].dup;
-    obj_txt["munge"]                                = (obj_["is"].match(ctRegex!(`verse|code`)))
-    ? obj_txt["munge"]
-    : obj_txt["munge"].strip;
-    if (_new_doc) {
-      anchor_tag = "";
-    }
-    auto x = munge.init;
-    ST_txtAndAnchorTagPlusHasFootnotesUrlsImages ret;
-    ret.obj_txt                       = "";
-    ret.anchor_tag                    = "";
-    ret.has_notes_reg                 = false;
-    ret.has_notes_star                = false;
-    ret.has_notes_plus                = false;
-    ret.has_links                     = false;
-    ret.has_images_without_dimensions = false;
-    if ((obj_["is"] == "para")
-      || (obj_["is"] == "heading")
-      || (obj_["is"] == "quote")
-      || (obj_["is"] == "group")
-      || (obj_["is"] == "block")
-      || (obj_["is"] == "verse")) {
-      obj_txt["munge"]                              = (obj_txt["munge"]).inline_markup_faces;
-      obj_txt["munge"]                              = (obj_txt["munge"]).links_and_images;
-    }
-    switch (obj_["is"]) {
-    case "heading":
-      if (_new_doc) {
-        anchor_tag                                  = "";
-      }
-      obj_txt["munge"] = _configured_auto_heading_numbering_and_segment_anchor_tags(obj_txt["munge"], obj_, conf_make_meta, _new_doc);
-      obj_txt["munge"] = _make_segment_anchor_tags_if_none_provided(obj_txt["munge"], obj_["lev"], _new_doc);
-      if (auto m = obj_txt["munge"].match(rgx.heading_anchor_tag)) {
-        anchor_tag                                  = m.captures[1];
-      } 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 "quote":
-      x                                             = munge.munge_quote(obj_txt["munge"]);
-      goto default;
-    case "verse":
-      x                                             = munge.munge_verse(obj_txt["munge"]);
-      goto default;
-    case "code":
-      x                                             = munge.munge_code(obj_txt["munge"]);
-      goto default;
-    case "table":
-      x                                             = munge.munge_table(obj_txt["munge"]);
-      goto default;
-    case "comment":
-      x                                             = munge.munge_comment(obj_txt["munge"]);
-      goto default;
-    case "doc_end_reset":
-      munge.initialize_note_numbers();
-      break;
-    default:
-      // para, heading, group, block, verse
-      ret.obj_txt                       = x.obj_txt;
-      ret.anchor_tag                    = anchor_tag;
-      ret.has_notes_reg                 = x.has_notes_reg;
-      ret.has_notes_star                = x.has_notes_star;
-      ret.has_notes_plus                = x.has_notes_plus;
-      ret.has_links                     = x.has_urls;
-      ret.has_images_without_dimensions = x.has_images_without_dimensions;
-      break;
-    }
-    anchor_tag = "";
-    return ret;
-  }
-  invariant() {
-  }
-  @safe auto _clean_heading_toc_()(
-    char[] heading_toc_,
-  ) {
-   auto m = (cast(char[]) heading_toc_).matchFirst(rgx.heading);
-   heading_toc_ = (m.post).replaceAll(rgx.inline_notes_curly_gen, "");
-   return heading_toc_;
-  };
-  @safe ST_flow_table_of_contents_gather_headings flow_table_of_contents_gather_headings(CMM)( //
-    string[string]         obj_,
-    CMM                    conf_make_meta,
-    string[string]         tag_in_seg,
-    string                 _anchor_tag,
-    string[][string]       lev4_subtoc,
-    ObjGenericComposite[]  the_document_toc_section,
-  ) {
-    ObjGenericComposite comp_obj_;
-    mixin InternalMarkup;
-    static 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%s%s#%s%s",
-        mkup.lnk_o,
-        heading_toc_.strip,
-        mkup.lnk_c,
-        mkup.url_o,
-        _anchor_tag,
-        mkup.url_c,
-      );
-      toc_txt_= toc_txt_.links_and_images;
-      comp_obj_                                  = set_object_generic("frontmatter", "toc", "para", "toc", toc_txt_.to!string.strip, 0);
-      comp_obj_.metainfo.identifier              = "";
-      comp_obj_.metainfo.object_number_off       = true;
-      comp_obj_.metainfo.object_number_type      = 0;
-      comp_obj_.metainfo.dummy_heading           = (an_object["dummy_heading_status"] == "t") ? true: false;
-      comp_obj_.attrib.indent_hang               = indent["hang_position"];
-      comp_obj_.attrib.indent_base               = indent["base_position"];
-      comp_obj_.attrib.bullet                    = false;
-      comp_obj_.has.inline_links                 = true;
-      the_document_toc_section                   ~= comp_obj_;
-    }
-    comp_obj_                                    = comp_obj_.init;
-    comp_obj_.metainfo.is_of_part                = "frontmatter";
-    comp_obj_.metainfo.is_of_section             = "toc";
-    comp_obj_.metainfo.is_of_type                = "para";
-    comp_obj_.metainfo.is_a                      = "toc";
-    comp_obj_.metainfo.ocn                       = 0;
-    comp_obj_.metainfo.identifier                = "";
-    comp_obj_.metainfo.object_number_off         = true;
-    comp_obj_.metainfo.object_number_type        = 0;
-    comp_obj_.metainfo.dummy_heading             = (an_object["dummy_heading_status"] == "t") ? true: false;
-    comp_obj_.attrib.bullet                      = false;
-    comp_obj_.has.inline_links                   = true;
-    switch (obj_["lev_markup_number"].to!int) {
-    case 0: .. case 3:
-      break;
-    case 4:
-      lev4_subtoc[tag_in_seg["seg_lv4"]] = [];
-      break;
-    case 5: .. case 7:
-      subtoc_txt_ = format("%s%s%s%s#%s%s",
-        mkup.lnk_o,
-        heading_toc_.strip,
-        mkup.lnk_c,
-        mkup.url_o,
-        _anchor_tag,
-        mkup.url_c,
-      );
-      lev4_subtoc[tag_in_seg["seg_lv4"]]
-      ~= links_and_images(obj_["lev_markup_number"]
-           ~ "~ " ~ subtoc_txt_.to!string.strip
-         );
-      break;
-    default:
-      break;
-    }
-    ST_flow_table_of_contents_gather_headings ret;
-    {
-      ret.the_document_toc_section = the_document_toc_section;
-      ret.lev4_subtoc              = lev4_subtoc;
-    }
-    return ret;
-  }
-  invariant() {
-  }
-private:
-  static int[] heading_num = [ 0, 0, 0, 0 ];
-  static string heading_number_auto_composite = "";
-  static string heading_number_auto_composite_segname = "";
-  static bool[] auto_heading_numbering = [ true, true, true, true];
-  @safe static string _configured_auto_heading_numbering_and_segment_anchor_tags(CMM)(
-    string           munge_,
-    string[string]   obj_,
-    CMM              conf_make_meta,
-    bool             _new_doc,
-  ) {
-    if (_new_doc) {
-      heading_num                         = [ 0, 0, 0, 0 ];
-      heading_number_auto_composite       = "";
-      auto_heading_numbering              = [ true, true, true, true];
-    }
-    if (conf_make_meta.make.auto_num_top_lv) {
-      if (obj_["lev_markup_number"].to!int == 0) {
-        heading_num[0]                    = 0;
-        heading_num[1]                    = 0;
-        heading_num[2]                    = 0;
-        heading_num[3]                    = 0;
-        heading_number_auto_composite     = "";
-      }
-      // auto_num_depth minimum 0
-      // (1.) default 2 (1.1.1) max 3 (1.1.1.1) implement
-      if (
-        conf_make_meta.make.auto_num_top_lv
-        > obj_["lev_markup_number"].to!uint
-      ) {
-        heading_num[1]                    = 0;
-        heading_num[2]                    = 0;
-        heading_num[3]                    = 0;
-      } else if (
-        conf_make_meta.make.auto_num_top_lv
-          == obj_["lev_markup_number"].to!uint
-      ) {
-        auto_heading_numbering[0] =
-          (munge_.match(rgx.auto_heading_numbering_off_lv1)) ? false : true;
-        if (auto_heading_numbering[0]) {
-          heading_num[0] ++;
-        }
-        heading_num[1]                    = 0;
-        heading_num[2]                    = 0;
-        heading_num[3]                    = 0;
-      } else if (
-        conf_make_meta.make.auto_num_top_lv
-          == (obj_["lev_markup_number"].to!uint - 1)
-      ) {
-        auto_heading_numbering[1] =
-          (munge_.match(rgx.auto_heading_numbering_off_lv2)) ? false : true;
-        if (auto_heading_numbering[0]
-        && auto_heading_numbering[1]) {
-          heading_num[1] ++;
-        }
-        heading_num[2]                    = 0;
-        heading_num[3]                    = 0;
-      } else if (
-        conf_make_meta.make.auto_num_top_lv
-          == (obj_["lev_markup_number"].to!uint - 2)
-      ) {
-        auto_heading_numbering[2] =
-          (munge_.match(rgx.auto_heading_numbering_off_lv3)) ? false : true;
-        if (auto_heading_numbering[0]
-        && auto_heading_numbering[1]
-        && auto_heading_numbering[2]) {
-          heading_num[2] ++;
-        }
-        heading_num[3]                    = 0;
-      } else if (
-        conf_make_meta.make.auto_num_top_lv
-          == (obj_["lev_markup_number"].to!uint - 3)
-      ) {
-        auto_heading_numbering[3] =
-          (munge_.match(rgx.auto_heading_numbering_off_lv4)) ? false : true;
-        if (auto_heading_numbering[0]
-        && auto_heading_numbering[1]
-        && auto_heading_numbering[2]
-        && auto_heading_numbering[3]) {
-          heading_num[3] ++;
-        }
-      }
-      if (auto_heading_numbering[0]) {
-        if (heading_num[3] > 0) {
-          heading_number_auto_composite
-            = (conf_make_meta.make.auto_num_depth.to!uint == 3
-              && auto_heading_numbering[3])
-            ? (format(q"┃%s.%s.%s.%s┃",
-                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
-            = ((conf_make_meta.make.auto_num_depth.to!uint >= 2)
-              && (conf_make_meta.make.auto_num_depth.to!uint <= 3)
-              && auto_heading_numbering[2])
-            ? (format(q"┃%s.%s.%s┃",
-                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
-            = ((conf_make_meta.make.auto_num_depth.to!uint >= 1)
-              && (conf_make_meta.make.auto_num_depth.to!uint <= 3)
-              && auto_heading_numbering[1])
-            ? (format(q"┃%s.%s┃",
-                heading_num[0].to!string,
-                heading_num[1].to!string
-              ))
-            : "";
-        } else if (heading_num[0] > 0
-          && munge_.match(rgx.auto_heading_numbering_lv1)
-        ) {
-          heading_number_auto_composite
-            = ((conf_make_meta.make.auto_num_depth.to!uint >= 0)
-              && (conf_make_meta.make.auto_num_depth.to!uint <= 3)
-              && auto_heading_numbering[0])
-            ? (format(q"┃%s┃",
-                heading_num[0].to!string
-              ))
-            : "";
-        } else {
-          heading_number_auto_composite = "";
-        }
-      }
-      heading_number_auto_composite_segname =
-        (heading_number_auto_composite.empty)
-          ? ""
-          : "seg_" ~ 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 >= conf_make_meta.make.auto_num_top_lv)) {
-        munge_ = munge_
-        .replaceFirst(rgx.heading,
-          "$1~$2 " ~ heading_number_auto_composite ~ ". ")
-        .replaceFirst(rgx.heading_marker_missing_tag,
-          "$1~" ~ heading_number_auto_composite_segname ~ " ");
-      }
-    }
-    return munge_;
-  }
-  static int heading_num_lev1 = 0;
-  @safe static string _make_segment_anchor_tags_if_none_provided()(
-    string munge_,
-    string lev_,
-    bool   _new_doc
-  ) {
-    if (!(munge_.match(rgx.heading_anchor_tag))) {
-      if (lev_ == "A") { // (_new_doc)
-        heading_num_lev1 = 0;
-      }
-      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] ~ " ");
-          if (auto n = munge_.match(rgx.heading_anchor_tag_plus_colon)) {
-            auto tag_remunge_ = n.captures[2]
-              .replaceAll(rgx.heading_marker_tag_has_colon, "..");
-            munge_ = munge_.replaceFirst(rgx.heading_anchor_tag_plus_colon, n.captures[1] ~ tag_remunge_ ~ " ");
-          }
-        } 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"
-        heading_num_lev1 ++;
-        munge_ = munge_.replaceFirst(
-          rgx.heading_marker_missing_tag,
-          "$1~" ~ "x" ~ heading_num_lev1.to!string ~ " ");
-      }
-    }
-    return munge_;
-  }
-}
-struct ObjAttributes {
-  string[string] _obj_attrib;
-  @safe string obj_attributes()(
-    string              obj_is_,
-    string              obj_raw,
-    ObjGenericComposite comp_obj_,
-  ) {
-    scope(exit) {
-      destroy(obj_is_);
-      destroy(obj_raw);
-      destroy(comp_obj_);
-    }
-    _obj_attrib["json"] ="{";
-    switch (obj_is_) {
-    case "heading":
-      _obj_attrib["json"] ~= txt_heading(obj_raw);
-      break;
-    case "para":
-      _obj_attrib["json"] ~= txt_para_and_blocks(obj_raw)
-      ~ txt_para(obj_raw);
-      break;
-    case "code":
-      _obj_attrib["json"] ~= txt_code(obj_raw);
-      break;
-    case "group":
-      _obj_attrib["json"] ~= txt_para_and_blocks(obj_raw)
-      ~ txt_group(obj_raw);
-      break;
-    case "block":
-      _obj_attrib["json"] ~= txt_para_and_blocks(obj_raw)
-      ~ txt_block(obj_raw);
-      break;
-    case "verse":
-      _obj_attrib["json"] ~= txt_verse(obj_raw);
-      break;
-    case "quote":
-      _obj_attrib["json"] ~= txt_quote(obj_raw);
-      break;
-    case "table":
-      _obj_attrib["json"] ~= txt_table(obj_raw);
-      break;
-    case "comment":
-      _obj_attrib["json"] ~= txt_comment(obj_raw);
-      break;
-    default:
-      _obj_attrib["json"] ~= txt_para(obj_raw);
-      break;
-    }
-    _obj_attrib["json"] ~= " }";
-    _obj_attrib["json"] = _set_additional_values_parse_as_json(_obj_attrib["json"], obj_is_, comp_obj_);
-    debug(structattrib) {
-      if (oa_j["is"].str() == "heading") {
-        writeln(_obj_attrib["json"]);
-        writeln(
-          "is: ", oa_j["is"].str(),
-          "; object_number: ", oa_j["object_number"].integer()
-        );
-      }
-    }
-    return _obj_attrib["json"];
-  }
-  invariant() {
-  }
-  private:
-  string _obj_attributes;
-  @safe string txt_para_and_blocks()(string obj_txt_in) {
-    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["indent"].to!string ~ ","
-      ~ " \"indent_base\": " ~ m["indent"].to!string ~ ",";
-    } else if (auto m = obj_txt_in.matchFirst(rgx.para_indent_hang)) {
-      _obj_attributes =" \"bullet\": \"false\","
-      ~ " \"indent_hang\": " ~ m["hang"].to!string ~ ","
-      ~ " \"indent_base\": " ~ m["indent"].to!string ~ ",";
-    } else if (auto m = obj_txt_in.matchFirst(rgx.para_indent)) {
-      _obj_attributes =" \"bullet\": \"false\","
-      ~ " \"indent_hang\": " ~ m["indent"].to!string ~ ","
-      ~ " \"indent_base\": " ~ m["indent"].to!string ~ ",";
-    } else {
-      _obj_attributes =" \"bullet\": \"false\","
-      ~ " \"indent_hang\": 0,"
-      ~ " \"indent_base\": 0,";
-    }
-    return _obj_attributes;
-  }
-  @safe string txt_heading()(string obj_txt_in) {
-    _obj_attributes = " \"use\": \"content\","
-    ~ " \"of\": \"para\","
-    ~ " \"is\": \"heading\"";
-    return _obj_attributes;
-  }
-  invariant() {
-  }
-  @safe string txt_para()(string obj_txt_in) {
-    _obj_attributes = " \"use\": \"content\","
-    ~ " \"of\": \"para\","
-    ~ " \"is\": \"para\"";
-    return _obj_attributes;
-  }
-  invariant() {
-  }
-  @safe string txt_quote()(string obj_txt_in) {
-    _obj_attributes = " \"use\": \"content\","
-    ~ " \"of\": \"block\","
-    ~ " \"is\": \"quote\"";
-    return _obj_attributes;
-  }
-  invariant() {
-  }
-  @safe string txt_group()(string obj_txt_in) {
-    _obj_attributes = " \"use\": \"content\","
-    ~ " \"of\": \"block\","
-    ~ " \"is\": \"group\"";
-    return _obj_attributes;
-  }
-  invariant() {
-  }
-  @safe string txt_block()(string obj_txt_in) {
-    _obj_attributes = " \"use\": \"content\","
-    ~ " \"of\": \"block\","
-    ~ " \"is\": \"block\"";
-    return _obj_attributes;
-  }
-  invariant() {
-  }
-  @safe string txt_verse()(string obj_txt_in) {
-    _obj_attributes = " \"use\": \"content\","
-    ~ " \"of\": \"block\","
-    ~ " \"is\": \"verse\"";
-    return _obj_attributes;
-  }
-  invariant() {
-  }
-  @safe string txt_code()(string obj_txt_in) {
-    _obj_attributes = " \"use\": \"content\","
-    ~ " \"of\": \"block\","
-    ~ " \"is\": \"code\"";
-    return _obj_attributes;
-  }
-  invariant() {
-  }
-  @safe string txt_table()(string obj_txt_in) {
-    _obj_attributes = " \"use\": \"content\","
-    ~ " \"of\": \"block\","
-    ~ " \"is\": \"table\"";
-    return _obj_attributes;
-  }
-  invariant() {
-  }
-  @safe string txt_comment()(string obj_txt_in) {
-    _obj_attributes = " \"use\": \"comment\","
-    ~ " \"of\": \"comment\","
-    ~ " \"is\": \"comment\"";
-    return _obj_attributes;
-  }
-  invariant() {
-  }
-  @safe string _set_additional_values_parse_as_json()(
-    string              _obj_attrib,
-    string              obj_is_,
-    ObjGenericComposite comp_obj_,
-  ) {
-    JSONValue oa_j = parseJSON(_obj_attrib);
-    assert(
-      (oa_j.type == JSON_TYPE.OBJECT)
-    );
-    if (obj_is_ == "heading") {
-      oa_j.object["object_number"]              = comp_obj_.metainfo.ocn;
-      oa_j.object["lev_markup_number"]          = comp_obj_.metainfo.heading_lev_markup;
-      oa_j.object["lev_collapsed_number"]       = comp_obj_.metainfo.heading_lev_collapsed;
-      oa_j.object["heading_ptr"]                = comp_obj_.ptr.heading;
-      oa_j.object["doc_object_ptr"]             = comp_obj_.ptr.doc_object;
-    }
-    oa_j.object["parent_object_number"]         = comp_obj_.metainfo.parent_ocn;
-    oa_j.object["parent_lev_markup_number"]     = comp_obj_.metainfo.parent_lev_markup;
-    _obj_attrib                                 = oa_j.toString();
-    return _obj_attrib;
-  }
-}
-struct BookIndexNuggetHash {
-  string main_term, sub_term, sub_term_bits;
-  int object_number_offset, object_number_endpoint;
-  string[] object_numbers;
-  string[][string][string] bi_hash_nugget;
-  string[] bi_main_terms_split_arr;
-  @safe string[][string][string] bookindex_nugget_hash(S)(
-    string bookindex_section,
-    OCNset obj_cite_digits,
-    S      tag_in_seg,
-  ) {
-    debug(asserts) { static assert(is(typeof(obj_cite_digits.object_number) == int)); }
-    debug(bookindexraw) {
-      if (!bookindex_section.empty) {
-        writeln(
-          "* [bookindex] ",
-          "[", obj_cite_digits.object_number.to!string, ": ", tag_in_seg["seg_lv4"], "] ", bookindex_section,
-          "  - - - ",
-          "[", obj_cite_digits.object_number.to!string, "] ", bookindex_section
-        );
-      }
-    }
-    static auto rgx = RgxI();
-    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_object_numbers_match)
-        ) {
-          main_term = m.captures[1].strip;
-          object_number_offset = m.captures[2].to!int;
-          object_number_endpoint = (obj_cite_digits.object_number + object_number_offset);
-          object_numbers ~= (obj_cite_digits.object_number.to!string
-          ~ "-" ~ object_number_endpoint.to!string);
-        } else {
-          main_term = bi_main_term_and_rest[0].strip;
-          object_numbers ~= obj_cite_digits.object_number.to!string;
-        }
-        bi_hash_nugget[main_term]["_a"] ~= object_numbers;
-        object_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_object_number_offset_split
-            );
-          foreach (sub_terms_bits; bi_sub_terms_split_arr) {
-            if (auto m = sub_terms_bits.match(rgx.bi_term_and_object_numbers_match)) {
-              sub_term = m.captures[1].strip;
-              object_number_offset = m.captures[2].to!int;
-              object_number_endpoint = (obj_cite_digits.object_number + object_number_offset);
-              object_numbers ~= (obj_cite_digits.object_number.to!string
-              ~ " - " ~ object_number_endpoint.to!string);
-            } else {
-              sub_term = sub_terms_bits.strip;
-              object_numbers ~= obj_cite_digits.object_number.to!string;
-            }
-            if (!empty(sub_term)) {
-              bi_hash_nugget[main_term][sub_term] ~= object_numbers;
-            }
-            object_numbers = null;
-          }
-        }
-      }
-    }
-    return bi_hash_nugget;
-  }
-  invariant() {
-  }
-}
-struct BookIndexReportIndent {
-  int mkn, skn;
-  @safe void bookindex_report_indented()(
-    string[][string][string] bookindex_unordered_hashes
-  ) {
-    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;
-  static auto rgx = RgxI();
-  static auto munge = ObjInlineMarkupMunge();
-  @safe void bookindex_write_section()(
-    string[][string][string] bookindex_unordered_hashes
-  ) {
-    auto mainkeys =
-      bookindex_unordered_hashes.byKey.array
-      .sort!("toUpper(a) < toUpper(b)", SwapStrategy.stable).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!("toUpper(a) < toUpper(b)", SwapStrategy.stable).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;
-    }
-  }
-  @system ST_bookindex backmatter_bookindex_build_abstraction_section(B)(
-    string[][string][string] bookindex_unordered_hashes,
-    OCNset                   obj_cite_digits,
-    B                        opt_action,
-  ) {
-    debug(asserts) { static assert(is(typeof(obj_cite_digits.object_number) == int)); }
-    mixin spineNode;
-    mixin InternalMarkup;
-    static 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!("toUpper(a) < toUpper(b)", SwapStrategy.stable).release;
-    ObjGenericComposite[] bookindex_section;
-    ObjGenericComposite comp_obj_;
-    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;
-      string[] bi_tmp_tags;
-      {
-        comp_obj_                                     =  set_object_heading("lev1", "backmatter", "bookindex", "Book Index");
-        comp_obj_.metainfo.identifier                 = "";
-        comp_obj_.metainfo.dummy_heading              = false;
-        comp_obj_.metainfo.object_number_off          = false;
-        comp_obj_.metainfo.object_number_type         = 0;
-        comp_obj_.tags.segment_anchor_tag_epub        = "_part_book_index";
-        comp_obj_.tags.anchor_tag_html                = comp_obj_.tags.segment_anchor_tag_epub;
-        comp_obj_.tags.in_segment_html                = "bookindex";
-        comp_obj_.tags.anchor_tags                    = ["section_bookindex"];
-        comp_obj_.has.inline_links                    = true;
-        bookindex_section                             ~= comp_obj_;
-        tag_assoc[comp_obj_.tags.anchor_tag_html]["seg_lv4"]            = comp_obj_.tags.in_segment_html;
-        tag_assoc[comp_obj_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = comp_obj_.tags.segment_anchor_tag_epub;
-        ++mkn;
-      }
-      {
-        comp_obj_                                     = set_object_heading("lev4", "backmatter", "bookindex", "Index");
-        comp_obj_.metainfo.identifier                 = "";
-        comp_obj_.metainfo.dummy_heading              = true;
-        comp_obj_.metainfo.object_number_off          = true;
-        comp_obj_.metainfo.object_number_type         = 0;
-        comp_obj_.tags.segment_anchor_tag_epub        = "bookindex";
-        comp_obj_.tags.anchor_tag_html                = comp_obj_.tags.segment_anchor_tag_epub;
-        comp_obj_.tags.in_segment_html                = comp_obj_.tags.anchor_tag_html;
-        comp_obj_.metainfo.heading_lev_collapsed      = 2;
-        comp_obj_.has.inline_links                    = false;
-        comp_obj_.tags.anchor_tags                    = ["bookindex"];
-        bookindex_section                             ~= comp_obj_;
-        tag_assoc[comp_obj_.tags.anchor_tag_html]["seg_lv4"]            = comp_obj_.tags.in_segment_html;
-        tag_assoc[comp_obj_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = comp_obj_.tags.segment_anchor_tag_epub;
-        ++mkn;
-      }
-      import std.array : appender;
-      auto buffer = appender!(char[])();
-      string[dchar] transTable = [' ' : "_"];
-      foreach (mainkey; mainkeys) {
-        bi_tmp_tags = [""];
-        bi_tmp = mkup.ff_i ~ mkup.bold ~ mkup.ff_o ~ mainkey ~ mkup.ff_c ~ mkup.bold ~ " ";
-        buffer.clear();
-        bi_tmp_tags ~= translate(mainkey, transTable);
-        auto bkidx_lnk(string locs) {
-          string markup = "";
-          if (auto m = locs.matchFirst(rgx.book_index_go)) {
-            markup
-              = links_and_images("{ " ~ m["link"] ~ " }"
-              ~ "#" ~ m["ocn"] ~ ", ");
-          } else {
-            writeln(__LINE__, ": ", locs);
-          }
-          return markup;
-        }
-        foreach (ref_; bookindex_unordered_hashes[mainkey]["_a"]) {
-          bi_tmp ~= bkidx_lnk(ref_);
-        }
-        bi_tmp ~= " \\\\\n    ";
-        bookindex_unordered_hashes[mainkey].remove("_a");
-        auto subkeys =
-          bookindex_unordered_hashes[mainkey].byKey.array
-          .sort!("toUpper(a) < toUpper(b)", SwapStrategy.stable).release;
-        foreach (subkey; subkeys) {
-          bi_tmp ~= subkey ~ ", ";
-          buffer.clear();
-          bi_tmp_tags ~= translate(subkey, transTable);
-          foreach (ref_; bookindex_unordered_hashes[mainkey][subkey]) {
-            bi_tmp ~= bkidx_lnk(ref_);
-          }
-          bi_tmp ~= " \\\\\n    ";
-          ++skn;
-        }
-        bi_tmp                                             = bi_tmp.replaceFirst(rgx.trailing_linebreak, "");
-        comp_obj_                                          = set_object_generic("backmatter", "bookindex", "para", "bookindex", bi_tmp.to!string.strip, 0);
-        comp_obj_.metainfo.identifier                      = "";
-        comp_obj_.metainfo.object_number_off               = true;
-        comp_obj_.metainfo.object_number_type              = 0;
-        comp_obj_.tags.anchor_tags                         = bi_tmp_tags;
-        comp_obj_.attrib.indent_hang                       = 0;
-        comp_obj_.attrib.indent_base                       = 1;
-        comp_obj_.attrib.bullet                            = false;
-        comp_obj_.has.inline_links                         = true;
-        comp_obj_.text                                     = bi_tmp.to!string.strip;
-        bookindex_section                                  ~= comp_obj_;
-        ++mkn;
-      }
-    } else {                              // no book index, (figure out what to do here)
-      comp_obj_                                       = set_object_heading("lev1", "backmatter", "bookindex", "(skip) there is no Book Index");
-      comp_obj_.metainfo.identifier                   = "";
-      comp_obj_.metainfo.dummy_heading                = true;
-      comp_obj_.metainfo.object_number_off            = true;
-      bookindex_section                               ~= comp_obj_;
-    }
-    ST_bookindex ret;
-    {
-      ret.bookindex = bookindex_section;
-      ret.ocn       = obj_cite_digits;
-    }
-    return ret;
-  }
-}
-struct NotesSection {
-  string[string] object_notes;
-  int previous_count;
-  int mkn;
-  static auto rgx = RgxI();
-  @safe private auto gather_notes_for_endnote_section(
-    ObjGenericComposite[] contents_am,
-    string[string]        tag_in_seg,
-    int                   cntr,
-  ) {
-    assert((contents_am[cntr].metainfo.is_a == "para")
-    || (contents_am[cntr].metainfo.is_a     == "heading")
-    || (contents_am[cntr].metainfo.is_a     == "quote")
-    || (contents_am[cntr].metainfo.is_a     == "group")
-    || (contents_am[cntr].metainfo.is_a     == "block")
-    || (contents_am[cntr].metainfo.is_a     == "verse"));
-    assert(cntr >= previous_count);
-    assert(
-      (contents_am[cntr].text).match(
-      rgx.inline_notes_al_all_note)
-    );
-    mixin InternalMarkup;
-    previous_count = cntr;
-    static auto mkup = InlineMarkup();
-    static auto munge = ObjInlineMarkupMunge();
-    foreach(m;
-      (contents_am[cntr].text).matchAll(
-        rgx.inline_notes_al_special_char_note)
-    ) {
-      debug(endnotes_build) { writeln(
-          "{", mkup.ff_i, mkup.superscript, mkup.ff_o, m["char"], ".", mkup.ff_c, mkup.superscript, "}"
-          ~ mkup.mark_internal_site_lnk,
-          tag_in_seg["seg_lv4"],
-            ".fnSuffix#noteref_\n  ", m["char"], " ",
-          m["note"]); // sometimes need segment name (segmented html & epub)
-      }
-      // you need anchor for segments at this point ->
-      object_notes["anchor"] ~= "note_" ~ m["char"] ~ "』";
-      object_notes["notes"]  ~= (tag_in_seg["seg_lv4"].empty)
-      ? (links_and_images(
-          "{" ~ mkup.ff_i ~ mkup.superscript  ~ mkup.ff_o ~ m["char"] ~ "." ~ mkup.ff_c  ~ mkup.superscript  ~ "}#noteref_"
-          ~ m["char"]) ~ " "
-          ~ m["note"] ~ "』"
-        )
-      : (links_and_images(
-          "{" ~ mkup.ff_i ~ mkup.superscript ~ mkup.ff_o ~ m["char"] ~ "." ~ mkup.ff_c  ~ mkup.superscript ~ "}"
-           ~ mkup.mark_internal_site_lnk
-           ~ tag_in_seg["seg_lv4"]
-           ~ ".fnSuffix#noteref_"
-           ~ m["char"]) ~ " "
-           ~ m["note"] ~ "』"
-        );
-    }
-    foreach(m;
-      (contents_am[cntr].text).matchAll(
-        rgx.inline_notes_al_regular_number_note)
-    ) {
-      debug(endnotes_build) { writeln(
-          "{", mkup.ff_i, mkup.superscipt, mkup.ff_o, m["num"], ".", mkup.ff_c, mkup.superscipt, "}"
-          ~ mkup.mark_internal_site_lnk,
-          tag_in_seg["seg_lv4"],
-            ".fnSuffix#noteref_\n  ", m["num"], " ",
-          m["note"]); // sometimes need segment name (segmented html & epub)
-      }
-      // you need anchor for segments at this point ->
-      object_notes["anchor"] ~= "note_" ~ m["num"] ~ "』";
-      object_notes["notes"]  ~= (tag_in_seg["seg_lv4"].empty)
-      ? (links_and_images(
-          "{" ~ mkup.ff_i ~ mkup.superscript  ~ mkup.ff_o ~ m["num"] ~ "." ~ mkup.ff_c  ~ mkup.superscript  ~ "}#noteref_"
-          ~ m["num"]) ~ " "
-          ~ m["note"] ~ "』"
-        )
-      : (links_and_images(
-          "{" ~ mkup.ff_i ~ mkup.superscript ~ mkup.ff_o ~ m["num"] ~ "." ~ mkup.ff_c  ~ mkup.superscript ~ "}"
-           ~ mkup.mark_internal_site_lnk
-           ~ tag_in_seg["seg_lv4"]
-           ~ ".fnSuffix#noteref_"
-           ~ m["num"]) ~ " "
-           ~ m["note"] ~ "』"
-        );
-    }
-    return object_notes;
-  }
-  @safe private auto gathered_notes() {
-    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_;
-  }
-  @safe private ST_endnotes backmatter_endnote_objects(O)(
-    OCNset         obj_cite_digits,
-    O              opt_action,
-  ) {
-    mixin spineNode;
-    ObjGenericComposite[] the_document_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_;
-    if ((endnotes_["notes"].length > 0)
-    && (opt_action.backmatter && opt_action.section_endnotes)) {
-      {
-        comp_obj_                                     = set_object_heading("lev1", "backmatter", "endnotes", "Endnotes");
-        comp_obj_.metainfo.identifier                 = "";
-        comp_obj_.metainfo.dummy_heading              = false;
-        comp_obj_.metainfo.object_number_off          = false;
-        comp_obj_.metainfo.object_number_type         = 0;
-        comp_obj_.tags.segment_anchor_tag_epub        = "_part_endnotes";
-        comp_obj_.tags.anchor_tag_html                = comp_obj_.tags.segment_anchor_tag_epub;
-        comp_obj_.tags.in_segment_html                = "endnotes";
-        comp_obj_.tags.anchor_tags                    = ["section_endnotes"];
-        the_document_endnotes_section                 ~= comp_obj_;
-        tag_assoc[comp_obj_.tags.anchor_tag_html]["seg_lv4"]            = comp_obj_.tags.in_segment_html;
-        tag_assoc[comp_obj_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = comp_obj_.tags.segment_anchor_tag_epub;
-        ++mkn;
-      }
-      {
-        comp_obj_                                     = set_object_heading("lev4", "backmatter", "endnotes", "Endnotes");
-        comp_obj_.metainfo.identifier                 = "";
-        comp_obj_.metainfo.dummy_heading              = true;
-        comp_obj_.metainfo.object_number_off          = true;
-        comp_obj_.metainfo.object_number_type         = 0;
-        comp_obj_.tags.segment_anchor_tag_epub        = "endnotes";
-        comp_obj_.tags.anchor_tag_html                = comp_obj_.tags.segment_anchor_tag_epub;
-        comp_obj_.tags.in_segment_html                = comp_obj_.tags.anchor_tag_html;
-        comp_obj_.tags.anchor_tags                    = ["endnotes"];
-        the_document_endnotes_section                 ~= comp_obj_;
-        tag_assoc[comp_obj_.tags.anchor_tag_html]["seg_lv4"]            = comp_obj_.tags.in_segment_html;
-        tag_assoc[comp_obj_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = comp_obj_.tags.segment_anchor_tag_epub;
-        ++mkn;
-      }
-    } else {
-      comp_obj_                                       = set_object_heading("lev1", "empty", "empty", "(skip) there are no Endnotes");
-      comp_obj_.metainfo.identifier                   = "";
-      comp_obj_.metainfo.dummy_heading                = true;
-      comp_obj_.metainfo.object_number_off            = true;
-      comp_obj_.metainfo.object_number_type           = 0;
-      the_document_endnotes_section                   ~= comp_obj_;
-    }
-    if (opt_action.backmatter && opt_action.section_endnotes) {
-      ObjGenericComposite comp_obj_endnote_;
-      comp_obj_endnote_                                       = set_object_generic("backmatter", "endnotes", "para", "endnote", "", 0);
-      comp_obj_endnote_.metainfo.identifier                   = "";
-      // comp_obj_.metainfo.dummy_heading                     = false;
-      comp_obj_.metainfo.object_number_off                    = true;
-      comp_obj_.metainfo.object_number_type                   = 0;
-      comp_obj_endnote_.attrib.indent_hang                    = 0;
-      comp_obj_endnote_.attrib.indent_base                    = 0;
-      comp_obj_endnote_.attrib.bullet                         = false;
-      foreach (i, endnote; endnotes_["notes"]) {
-        auto     m                                            = endnote.matchFirst(rgx.note_ref);
-        string   notenumber                                   = m["ref"].to!string;
-        string   anchor_tag                                   = "note_" ~ notenumber;
-        comp_obj_endnote_.tags.anchor_tags                    = [ endnotes_["anchor"][i] ];
-        comp_obj_endnote_.has.inline_links                    = true;
-        comp_obj_endnote_.text                                = endnote.inline_markup_faces.strip;
-        the_document_endnotes_section                         ~= comp_obj_endnote_;
-      }
-    }
-    ST_endnotes ret;
-    {
-      ret.endnotes = the_document_endnotes_section;
-      ret.ocn      = obj_cite_digits;
-    }
-    return ret;
-  }
-}
-@system public ST_biblio_section backmatter_make_the_bibliography_section()(
-  string[]     biblio_unsorted_incomplete,
-  JSONValue[]  bib_arr_json,
-) {
-  Bibliography biblio = Bibliography();
-  ObjGenericComposite comp_obj_;
-  static auto mkup = InlineMarkup();
-  ST_flow_bibliography _get = biblio.flow_bibliography_(biblio_unsorted_incomplete, bib_arr_json);
-  JSONValue[] biblio_ordered;
-  biblio_ordered            = _get.biblio_sorted;
-  if (biblio_ordered.length > 0) {
-    {
-      comp_obj_                                 = set_object_heading("lev1", "backmatter", "bibliography", "Bibliography");
-      comp_obj_.metainfo.identifier             = "";
-      comp_obj_.metainfo.dummy_heading          = false;
-      comp_obj_.metainfo.object_number_off      = false;
-      comp_obj_.metainfo.object_number_type     = 0;
-      comp_obj_.tags.segment_anchor_tag_epub    = "_part_bibliography";
-      comp_obj_.tags.anchor_tag_html            = comp_obj_.tags.segment_anchor_tag_epub;
-      comp_obj_.tags.in_segment_html            = "bibliography";
-      comp_obj_.tags.anchor_tags                = ["section_bibliography"];
-      comp_obj_.metainfo.dom_structure_markedup_tags_status  = [ 1, 1, 0, 0, 0, 0, 0, 0];
-      comp_obj_.metainfo.dom_structure_collapsed_tags_status = [ 1, 1, 0, 0, 0, 0, 0, 0];
-      the_document_bibliography_section         ~= comp_obj_;
-      tag_assoc[comp_obj_.tags.anchor_tag_html]["seg_lv4"]            = comp_obj_.tags.in_segment_html;
-      tag_assoc[comp_obj_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = comp_obj_.tags.segment_anchor_tag_epub;
-    }
-    {
-      comp_obj_                                 = set_object_heading("lev4", "backmatter", "bibliography", "Bibliography");
-      comp_obj_.metainfo.identifier             = "";
-      comp_obj_.metainfo.dummy_heading          = true;
-      comp_obj_.metainfo.object_number_off      = true;
-      comp_obj_.metainfo.object_number_type     = 0;
-      comp_obj_.tags.segment_anchor_tag_epub    = "bibliography";
-      comp_obj_.tags.anchor_tag_html            = comp_obj_.tags.segment_anchor_tag_epub;
-      comp_obj_.tags.in_segment_html            = comp_obj_.tags.anchor_tag_html;
-      comp_obj_.tags.anchor_tags                = ["bibliography"];
-      the_document_bibliography_section         ~= comp_obj_;
-      tag_assoc[comp_obj_.tags.anchor_tag_html]["seg_lv4"]            = comp_obj_.tags.in_segment_html;
-      tag_assoc[comp_obj_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = comp_obj_.tags.segment_anchor_tag_epub;
-    }
-    {
-      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) ? "" : ", " ~ mkup.ff_i ~ mkup.italic ~ mkup.ff_o ~ entry["journal"].str ~ mkup.ff_c ~ mkup.italic),
-          ((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_                                   = set_object_generic("backmatter", "bibliography", "para", "bibliography", out_.to!string.strip, 0);
-        comp_obj_.metainfo.identifier               = "";
-        comp_obj_.metainfo.object_number_off        = true;
-        comp_obj_.metainfo.object_number_type       = 0;
-        comp_obj_.attrib.indent_hang                = 0;
-        comp_obj_.attrib.indent_base                = 1;
-        comp_obj_.attrib.bullet                     = bullet;
-        comp_obj_.tags.anchor_tags                  = [anchor_tag];
-        the_document_bibliography_section           ~= comp_obj_;
-      }
-    }
-  } else {
-    comp_obj_                                   = set_object_heading("lev1", "empty", "empty", "(skip) there is no Bibliography");
-    comp_obj_.metainfo.identifier               = "";
-    comp_obj_.metainfo.dummy_heading            = true;
-    comp_obj_.metainfo.object_number_off        = true;
-    comp_obj_.metainfo.object_number_type       = 0;
-    the_document_bibliography_section           ~= comp_obj_;
-  }
-  debug(bibliosection) { foreach (o; the_document_bibliography_section) { writeln(o.text); } }
-  ST_biblio_section ret;
-  {
-    ret.bibliography_section = the_document_bibliography_section;
-    ret.tag_assoc            = tag_assoc; //
-  }
-  return ret;
-}
-struct Bibliography {
-  @system public ST_flow_bibliography flow_bibliography_()(
-    string[]    biblio_unsorted_incomplete,
-    JSONValue[] bib_arr_json
-  ) {
-    JSONValue[] biblio_unsorted
-      = biblio_make_unsorted_array_of_json_objects(biblio_unsorted_incomplete, bib_arr_json); // TODO lookat returns
-    biblio_arr_json = [];
-    biblio_unsorted_incomplete = [];
-    JSONValue[] biblio_sorted__ = biblio_sort(biblio_unsorted);
-    debug(biblio0) {
-      biblio_debug(biblio_sorted__);
-      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++;
-      }
-    }
-    ST_flow_bibliography ret;
-    {
-      ret.biblio_sorted  = biblio_sorted__;
-      ret.bib_arr_json  = bib_arr_json;
-      ret.biblio_unsorted_incomplete  = biblio_unsorted_incomplete;
-    }
-    return ret;
-  }
-  @system final private JSONValue[] biblio_make_unsorted_array_of_json_objects()(
-    string[]      biblio_unordered,
-    JSONValue[]   bib_arr_json
-  ) {
-    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;
-    }
-    return bib_arr_json.dup;
-  }
-  @system final private JSONValue[] biblio_sort()(JSONValue[] biblio_unordered) {
-    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_;
-  }
-  @system void biblio_debug()(JSONValue[] biblio_sorted) {
-    debug(biblio0) {
-      foreach (j; biblio_sorted) {
-        if (!empty(j["fulltitle"].str)) { writeln(j["sortby_deemed_author_year_title"]); }
-      }
-    }
-  }
-}
-@system public ObjGenericComposite[] backmatter_gather_table_of_contents(
-  ObjGenericComposite[] the_document_endnotes_section,
-  ObjGenericComposite[] the_document_glossary_section,
-  ObjGenericComposite[] the_document_bibliography_section,
-  ObjGenericComposite[] the_document_bookindex_section,
-  ObjGenericComposite[] the_document_blurb_section,
-) {
-  ObjGenericComposite[] toc_section_backmatter;
-  string toc_txt_;
-  static auto mkup = InlineMarkup();
-  ObjGenericComposite   comp_obj_;
-  int[string] indent = [
-    "hang_position" : 1,
-    "base_position" : 1,
-  ];
-  comp_obj_                                          = set_object_generic("frontmatter", "toc", "para", "toc", "", 0);
-  comp_obj_.metainfo.identifier                      = "";
-  comp_obj_.metainfo.object_number_off               = true;
-  comp_obj_.metainfo.object_number_type              = 0;
-  comp_obj_.attrib.indent_hang                       = indent["hang_position"];
-  comp_obj_.attrib.indent_base                       = indent["base_position"];
-  comp_obj_.attrib.bullet                            = false;
-  if (the_document_endnotes_section.length > 1) {
-    toc_txt_ = format("%s%s%s%s#%s%s",
-      mkup.lnk_o,
-      "Endnotes",
-      mkup.lnk_c,
-      mkup.url_o,
-      "endnotes",
-      mkup.url_c,
-    );
-    toc_txt_= toc_txt_.links_and_images;
-    comp_obj_.text                                   = toc_txt_.to!string.strip;
-    comp_obj_.has.inline_links                       = true;
-    toc_section_backmatter                           ~= comp_obj_;
-  }
-  if (the_document_glossary_section.length > 1) {
-    toc_txt_ = format("%s%s%s%s#%s%s",
-      mkup.lnk_o,
-      "Glossary",
-      mkup.lnk_c,
-      mkup.url_o,
-      "glossary",
-      mkup.url_c,
-    );
-    toc_txt_= toc_txt_.links_and_images;
-    comp_obj_.text                                   = toc_txt_.to!string.strip;
-    comp_obj_.has.inline_links                       = true;
-    toc_section_backmatter                           ~= comp_obj_;
-  }
-  if (the_document_bibliography_section.length > 1){
-    toc_txt_ = format("%s%s%s%s#%s%s",
-      mkup.lnk_o,
-      "Bibliography",
-      mkup.lnk_c,
-      mkup.url_o,
-      "bibliography",
-      mkup.url_c,
-    );
-    toc_txt_= toc_txt_.links_and_images;
-    comp_obj_.text                                   = toc_txt_.to!string.strip;
-    comp_obj_.has.inline_links                       = true;
-    toc_section_backmatter                           ~= comp_obj_;
-  }
-  if (the_document_bookindex_section.length > 1) {
-    toc_txt_ = format("%s%s%s%s#%s%s",
-      mkup.lnk_o,
-      "Book Index",
-      mkup.lnk_c,
-      mkup.url_o,
-      "bookindex",
-      mkup.url_c,
-    );
-    toc_txt_= toc_txt_.links_and_images;
-    comp_obj_.text                                   = toc_txt_.to!string.strip;
-    comp_obj_.has.inline_links                       = true;
-    toc_section_backmatter                           ~= comp_obj_;
-  }
-  if (the_document_blurb_section.length > 1) {
-    toc_txt_ = format("%s%s%s%s#%s%s",
-      mkup.lnk_o,
-      "Blurb",
-      mkup.lnk_c,
-      mkup.url_o,
-      "blurb",
-      mkup.url_c,
-    );
-    toc_txt_= toc_txt_.links_and_images;
-    comp_obj_.has.inline_links                       = true;
-    comp_obj_.text                                   = toc_txt_.to!string.strip;
-    toc_section_backmatter                           ~= comp_obj_;
-  }
-  debug(toc) {
-    writefln( "%s %s", __LINE__,);
-    foreach (toc_linked_heading; toc_section_backmatter) {
-      writeln(mkup.indent_by_spaces_provided(toc_linked_heading.attrib.indent_hang), toc_linked_heading.text);
-    }
-  }
-  return toc_section_backmatter;
-}
-@system public ST_ancestors after_doc_determine_ancestors(
-  ObjGenericComposite[] the_document_body_section,
-  ObjGenericComposite[] the_document_endnotes_section,
-  ObjGenericComposite[] the_document_glossary_section,
-  ObjGenericComposite[] the_document_bibliography_section,
-  ObjGenericComposite[] the_document_bookindex_section,
-  ObjGenericComposite[] the_document_blurb_section,
-) {
-  @safe int[] _get_ancestors_markup(ObjGenericComposite obj, int[] _ancestors_markup) {
-    if (obj.metainfo.is_a == "heading") {
-      debug(dom) { writeln(obj.text); }
-      if (obj.metainfo.heading_lev_markup == 1) {
-        _ancestors_markup = [
-          _ancestors_markup[0],
-          0,0,0,0,0,0,0
-        ];
-      }
-      if (obj.metainfo.heading_lev_markup == 2) {
-        _ancestors_markup = [
-          _ancestors_markup[0],
-          _ancestors_markup[1],
-          0,0,0,0,0,0
-        ];
-      }
-      if (obj.metainfo.heading_lev_markup == 3) {
-        _ancestors_markup = [
-          _ancestors_markup[0],
-          _ancestors_markup[1],
-          _ancestors_markup[2],
-          0,0,0,0,0
-        ];
-      }
-      if (obj.metainfo.heading_lev_markup == 4) {
-        _ancestors_markup = [
-          _ancestors_markup[0],
-          _ancestors_markup[1],
-          _ancestors_markup[2],
-          _ancestors_markup[3],
-          0,0,0,0
-        ];
-      }
-      if (obj.metainfo.heading_lev_markup == 5) {
-        _ancestors_markup = [
-          _ancestors_markup[0],
-          _ancestors_markup[1],
-          _ancestors_markup[2],
-          _ancestors_markup[3],
-          _ancestors_markup[4],
-          0,0,0
-        ];
-      }
-      if (obj.metainfo.heading_lev_markup == 6) {
-        _ancestors_markup = [
-          _ancestors_markup[0],
-          _ancestors_markup[1],
-          _ancestors_markup[2],
-          _ancestors_markup[3],
-          _ancestors_markup[4],
-          _ancestors_markup[5],
-          0,0
-        ];
-      }
-      if (obj.metainfo.heading_lev_markup == 7) {
-        _ancestors_markup = [
-          _ancestors_markup[0],
-          _ancestors_markup[1],
-          _ancestors_markup[2],
-          _ancestors_markup[3],
-          _ancestors_markup[4],
-          _ancestors_markup[5],
-          _ancestors_markup[6],
-          0
-        ];
-      }
-      if (obj.metainfo.heading_lev_markup == 8) {
-        _ancestors_markup = [
-          _ancestors_markup[0],
-          _ancestors_markup[1],
-          _ancestors_markup[2],
-          _ancestors_markup[3],
-          _ancestors_markup[4],
-          _ancestors_markup[5],
-          _ancestors_markup[6],
-          _ancestors_markup[7]
-        ];
-      }
-      _ancestors_markup[obj.metainfo.heading_lev_markup] = obj.metainfo.ocn;
-    }
-    debug(ancestor_markup) { writeln("marked up: ", _ancestors_markup); }
-    return _ancestors_markup;
-  }
-  @safe int[] _get_ancestors_collapsed(ObjGenericComposite obj, int[] _ancestors_collapsed) {
-    if (obj.metainfo.is_a == "heading") {
-      if (obj.metainfo.heading_lev_collapsed == 1) {
-        _ancestors_collapsed = [
-          _ancestors_collapsed[0],
-          0,0,0,0,0,0,0
-        ];
-      }
-      if (obj.metainfo.heading_lev_collapsed == 2) {
-        _ancestors_collapsed = [
-          _ancestors_collapsed[0],
-          _ancestors_collapsed[1],
-          0,0,0,0,0,0
-        ];
-      }
-      if (obj.metainfo.heading_lev_collapsed == 3) {
-        _ancestors_collapsed = [
-          _ancestors_collapsed[0],
-          _ancestors_collapsed[1],
-          _ancestors_collapsed[2],
-          0,0,0,0,0
-        ];
-      }
-      if (obj.metainfo.heading_lev_collapsed == 4) {
-        _ancestors_collapsed = [
-          _ancestors_collapsed[0],
-          _ancestors_collapsed[1],
-          _ancestors_collapsed[2],
-          _ancestors_collapsed[3],
-          0,0,0,0
-        ];
-      }
-      if (obj.metainfo.heading_lev_collapsed == 5) {
-        _ancestors_collapsed = [
-          _ancestors_collapsed[0],
-          _ancestors_collapsed[1],
-          _ancestors_collapsed[2],
-          _ancestors_collapsed[3],
-          _ancestors_collapsed[4],
-          0,0,0
-        ];
-      }
-      if (obj.metainfo.heading_lev_collapsed == 6) {
-        _ancestors_collapsed = [
-          _ancestors_collapsed[0],
-          _ancestors_collapsed[1],
-          _ancestors_collapsed[2],
-          _ancestors_collapsed[3],
-          _ancestors_collapsed[4],
-          _ancestors_collapsed[5],
-          0,0
-        ];
-      }
-      if (obj.metainfo.heading_lev_collapsed == 7) {
-        _ancestors_collapsed = [
-          _ancestors_collapsed[0],
-          _ancestors_collapsed[1],
-          _ancestors_collapsed[2],
-          _ancestors_collapsed[3],
-          _ancestors_collapsed[4],
-          _ancestors_collapsed[5],
-          _ancestors_collapsed[6],
-          0
-        ];
-      }
-      if (obj.metainfo.heading_lev_collapsed == 8) {
-        _ancestors_collapsed = [
-          _ancestors_collapsed[0],
-          _ancestors_collapsed[1],
-          _ancestors_collapsed[2],
-          _ancestors_collapsed[3],
-          _ancestors_collapsed[4],
-          _ancestors_collapsed[5],
-          _ancestors_collapsed[6],
-          _ancestors_collapsed[7]
-        ];
-      }
-      _ancestors_collapsed[obj.metainfo.heading_lev_collapsed] = obj.metainfo.ocn;
-    }
-    debug(ancestor_collapsed) { writeln("collapsed: ", _ancestors_collapsed); }
-    return _ancestors_collapsed;
-  }
-  // multiple 1~ levels, loop through document body
-  if (the_document_body_section.length > 1) {
-    int[] _ancestors_markup = [0,0,0,0,0,0,0,0];
-    int[][] _ancestors_markup_;
-    _ancestors_markup = [1,0,0,0,0,0,0,0];
-    _ancestors_markup_ ~= _ancestors_markup;
-    int[] _ancestors_collapsed = [0,0,0,0,0,0,0,0];
-    int[][] _ancestors_collapsed_;
-    _ancestors_collapsed = [1,0,0,0,0,0,0,0];
-    _ancestors_collapsed_ ~= _ancestors_collapsed;
-    foreach (ref obj; the_document_body_section) {
-      if (obj.metainfo.is_a == "heading") {
-        obj.metainfo.markedup_ancestors = _get_ancestors_markup(obj, _ancestors_markup);
-        obj.metainfo.collapsed_ancestors = _get_ancestors_collapsed(obj, _ancestors_collapsed);
-        obj.metainfo.parent_ocn = obj.metainfo.markedup_ancestors[obj.metainfo.parent_lev_markup];
-      }
-    }
-    debug(ancestors) {
-      writeln("ancestors markup o_n:    ", obj.metainfo.markedup_ancestors);
-      writeln("ancestors collapsed o_n: ", obj.metainfo.markedup_ancestors);
-    }
-  }
-  ST_ancestors ret;
-  ret.the_document_body_section         = the_document_body_section;
-  ret.the_document_endnotes_section     = the_document_endnotes_section;
-  ret.the_document_glossary_section     = the_document_glossary_section;
-  ret.the_document_bibliography_section = the_document_bibliography_section;
-  ret.the_document_bookindex_section    = the_document_bookindex_section;
-  ret.the_document_blurb_section        = the_document_blurb_section;
-  return ret;
-}
-@system public ST_segnames after_doc_determine_segnames(
-  ObjGenericComposite[] the_document_body_section,
-  ObjGenericComposite[] the_document_endnotes_section,
-  ObjGenericComposite[] the_document_glossary_section,
-  ObjGenericComposite[] the_document_bibliography_section,
-  ObjGenericComposite[] the_document_bookindex_section,
-  ObjGenericComposite[] the_document_blurb_section,
-  string[][string]      segnames,
-  int                   html_segnames_ptr_cntr,
-  int                   html_segnames_ptr,
-) {
-  if (the_document_endnotes_section.length > 1) {
-    segnames["html"] ~= "endnotes";
-    segnames["epub"] ~= "endnotes";
-    html_segnames_ptr = html_segnames_ptr_cntr;
-    foreach (ref obj; the_document_endnotes_section) {
-      if (obj.metainfo.is_a == "heading") {
-        obj.metainfo.parent_ocn = obj.metainfo.markedup_ancestors[obj.metainfo.parent_lev_markup];
-      }
-      if (obj.metainfo.heading_lev_markup == 4) {
-        obj.ptr.html_segnames = html_segnames_ptr;
-        break;
-      }
-    }
-    html_segnames_ptr_cntr++;
-  }
-  if (the_document_glossary_section.length > 1) {
-    segnames["html"] ~= "glossary";
-    segnames["epub"] ~= "glossary";
-    html_segnames_ptr = html_segnames_ptr_cntr;
-    foreach (ref obj; the_document_glossary_section) {
-      if (obj.metainfo.is_a == "heading") {
-        obj.metainfo.parent_ocn = obj.metainfo.markedup_ancestors[obj.metainfo.parent_lev_markup];
-      }
-      if (obj.metainfo.heading_lev_markup == 4) {
-        obj.ptr.html_segnames = html_segnames_ptr;
-        break;
-      }
-    }
-    html_segnames_ptr_cntr++;
-  }
-  if (the_document_bibliography_section.length > 1) {
-    segnames["html"] ~= "bibliography";
-    segnames["epub"] ~= "bibliography";
-    html_segnames_ptr = html_segnames_ptr_cntr;
-    foreach (ref obj; the_document_bibliography_section) {
-      if (obj.metainfo.is_a == "heading") {
-        obj.metainfo.parent_ocn = obj.metainfo.markedup_ancestors[obj.metainfo.parent_lev_markup];
-      }
-      if (obj.metainfo.heading_lev_markup == 4) {
-        obj.ptr.html_segnames = html_segnames_ptr;
-        break;
-      }
-    }
-    html_segnames_ptr_cntr++;
-  }
-  if (the_document_bookindex_section.length > 1) {
-    segnames["html"] ~= "bookindex";
-    segnames["epub"] ~= "bookindex";
-    html_segnames_ptr = html_segnames_ptr_cntr;
-    foreach (ref obj; the_document_bookindex_section) {
-      if (obj.metainfo.is_a == "heading") {
-        obj.metainfo.parent_ocn = obj.metainfo.markedup_ancestors[obj.metainfo.parent_lev_markup];
-      }
-      if (obj.metainfo.heading_lev_markup == 4) {
-        obj.ptr.html_segnames = html_segnames_ptr;
-        break;
-      }
-    }
-    html_segnames_ptr_cntr++;
-  }
-  if (the_document_blurb_section.length > 1) {
-    segnames["html"] ~= "blurb";
-    segnames["epub"] ~= "blurb";
-    html_segnames_ptr = html_segnames_ptr_cntr;
-    foreach (ref obj; the_document_blurb_section) {
-      if (obj.metainfo.is_a == "heading") {
-        obj.metainfo.parent_ocn = obj.metainfo.markedup_ancestors[obj.metainfo.parent_lev_markup];
-      }
-      if (obj.metainfo.heading_lev_markup == 4) {
-        obj.ptr.html_segnames = html_segnames_ptr;
-        break;
-      }
-    }
-    html_segnames_ptr_cntr++;
-  }
-  ST_segnames ret;
-  ret.segnames                          = segnames;
-  ret.html_segnames_ptr_cntr            = html_segnames_ptr_cntr;
-  ret.html_segnames_ptr                 = html_segnames_ptr;
-  return ret;
-}
-// decendants
-@safe auto after_doc_get_decendants()(ObjGenericComposite[] document_sections) {
-  int[string] _heading_ocn_decendants;
-  string[] _ocn_open_key = ["","","","","","","",""];
-  auto _doc_sect_length = document_sections.length - 1;
-  int _last_ocn;
-  foreach (_lg, ref obj; document_sections) {
-    if (obj.metainfo.is_a == "heading") {
-      foreach (_dts_lv, dom_tag_status; obj.metainfo.dom_structure_markedup_tags_status) {
-        switch (dom_tag_status) with (DomTags) {
-        case none: break;
-        case open:
-            _ocn_open_key[_dts_lv] = (obj.metainfo.ocn).to!string;
-            _heading_ocn_decendants[_ocn_open_key[_dts_lv]] = obj.metainfo.ocn;
-          break;
-        case close:
-          if (_ocn_open_key[_dts_lv].empty) {
-            _ocn_open_key[_dts_lv] = "0";
-          }
-          _heading_ocn_decendants[_ocn_open_key[_dts_lv]] = obj.metainfo.ocn - 1;
-          _ocn_open_key[_dts_lv] = (0).to!string;
-          break;
-        case close_and_open:
-          if (_ocn_open_key[_dts_lv].empty) {
-            _ocn_open_key[_dts_lv] = "0";
-          }
-          _heading_ocn_decendants[_ocn_open_key[_dts_lv]] = obj.metainfo.ocn - 1;
-          _ocn_open_key[_dts_lv] = (obj.metainfo.ocn).to!string;
-          _heading_ocn_decendants[_ocn_open_key[_dts_lv]] = obj.metainfo.ocn;
-          break;
-        case open_still: break;
-        default: break;
-        }
-      }
-    }
-    if (obj.metainfo.ocn > 0) {
-      _last_ocn = obj.metainfo.ocn;
-    }
-    if (_lg == _doc_sect_length) {
-      _heading_ocn_decendants["1"] = _last_ocn; // close existing o_n key
-    }
-  }
-  Tuple!(int, int)[] pairs;
-  foreach (pair; _heading_ocn_decendants.byPair) {
-    pairs ~= tuple(pair[0].to!int, pair[1]);
-  }
-  return pairs.sort;
-}
-@safe string[] extract_images()(string content_block) {
-  static auto rgx = RgxI();
-  string[] images_;
-  if (auto m = content_block.matchAll(rgx.image)) {
-    images_ ~= m.captures[1];
-  }
-  return images_;
-}
-@system auto _image_dimensions(O,M)(O obj, M manifested) {
-  static auto rgx = RgxI();
-  if (obj.has.image_without_dimensions) {
-    import std.math;
-    import imageformats;
-    int w, h, chans;
-    real _w, _h;
-    int max_width = 640;
-    foreach (img; obj.text.matchAll(rgx.inline_image_without_dimensions)) {
-      try {
-        read_image_info(manifested.src.image_dir_path ~ "/" ~ img["img"], w, h, chans);
-      } catch (Exception ex) {
-        writeln("WARNING, image not found: ", img["img"], "\n  ", manifested.src.image_dir_path ~ "/" ~ img["img"]);
-      }
-      // calculate, decide max width and proportionally reduce to keep w & h within it
-      debug(images) { writeln("width: ", w, ", height: ", h); }
-      if (w > max_width) {
-        _w = max_width;
-        _h = round((max_width / w.to!real) * h.to!real);
-      } else {
-        _w = w;
-        _h = h;
-      }
-      obj.text = obj.text.replaceFirst(
-        rgx.inline_image_without_dimensions,
-        format(q"┃%s☼%s,w%sh%s %s┃",
-          "$1",
-          "$3",
-          _w.to!string,
-          _h.to!string,
-          "$6",
-        )
-      );
-    }
-    debug(images) { writeln("image without dimensions: ", obj.text); }
-  }
-  return obj;
-}
-// links
-@safe auto _links(O)(O obj) {
-  static auto rgx = RgxI();
-  if (auto m = obj.text.match(rgx.inline_link_stow_uri)) {
-    debug(links) {
-      writeln("number of link matches to stow: ", (obj.text.match(rgx.inline_link_stow_uri)).count);
-      writeln("links to stow: ", (obj.text.match(rgx.inline_link_stow_uri)));
-    }
-    int _n_matches = (obj.text.match(rgx.inline_link_stow_uri)).count.to!int;
-    for(int i = 0; i < _n_matches; ++i) {
-      if (obj.text.match(rgx.inline_link_stow_uri)) {
-        obj.stow.link ~= obj.text.matchFirst(rgx.inline_link_stow_uri)[2];
-        obj.text = obj.text.replaceFirst(
-          rgx.inline_link_stow_uri,
-          format(q"┃┥%s┝┤%s├┃", "$1", i)
-        );
-      }
-    }
-  }
-  return obj;
-}
-struct NodeStructureMetadata {
-  int lv, lv0, lv1, lv2, lv3, lv4, lv5, lv6, lv7;
-  int obj_cite_digit;
-  int[string] p_; // p_ parent_
-  static auto rgx = RgxI();
-  @safe ObjGenericComposite node_location_emitter(La,Ta)(
-    string         lev_markup_number,
-    string[string] tag_in_seg,
-    La             lev_anchor_tag,
-    Ta             tag_assoc,
-    OCNset         obj_cite_digits,
-    int            cntr_,
-    int            ptr_,
-    string         is_
-  ) {
-    debug(asserts) { static assert(is(typeof(obj_cite_digits.object_number) == int)); }
-    assert(is_ != "heading");
-    assert(obj_cite_digits.object_number.to!int >= 0);
-    assert(is_ != "heading");                          // should not be necessary
-    assert(obj_cite_digits.object_number.to!int >= 0); // should not be necessary
-    if (lv7 > eN.bi.off) {
-      p_["lev_markup_number"]                       = DocStructMarkupHeading.h_text_4;
-      p_["object_number"]                           = lv7;
-    } else if (lv6 > eN.bi.off) {
-      p_["lev_markup_number"]                       = DocStructMarkupHeading.h_text_3;
-      p_["object_number"]                           = lv6;
-    } else if (lv5 > eN.bi.off) {
-      p_["lev_markup_number"]                       = DocStructMarkupHeading.h_text_2;
-      p_["object_number"]                           = lv5;
-    } else {
-      p_["lev_markup_number"]                       = DocStructMarkupHeading.h_text_1;
-      p_["object_number"]                           = lv4;
-    }
-    ObjGenericComposite comp_obj_location;
-    comp_obj_location                               = comp_obj_location.init;
-    comp_obj_location.metainfo.is_a                 = is_;
-    comp_obj_location.metainfo.ocn                  = obj_cite_digits.object_number;
-    comp_obj_location.metainfo.identifier           = obj_cite_digits.identifier;
-    comp_obj_location.tags.anchor_tag_html          = tag_in_seg["seg_lv4"];
-    comp_obj_location.tags.segment_anchor_tag_epub  = tag_in_seg["seg_lv1to4"];
-    comp_obj_location.tags.heading_lev_anchor_tag   = lev_anchor_tag;
-    comp_obj_location.metainfo.parent_ocn           = p_["object_number"];
-    comp_obj_location.metainfo.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.metainfo.parent_lev_markup >= 4);
-    assert(comp_obj_location.metainfo.parent_lev_markup <= 7);
-    assert(comp_obj_location.metainfo.parent_ocn >= 0);
-    return comp_obj_location;
-  }
-  invariant() {
-  }
-  @safe ObjGenericComposite node_emitter_heading(O,TaL,TA,SOAT)(
-    O              an_object,
-    string[string] tag_in_seg,
-    TaL            lev_anchor_tag,
-    TA             tag_assoc,
-    OCNset         obj_cite_digits,
-    int            cntr_,
-    int            ptr_,
-    string[]       lv_ancestors_txt,
-    int            html_segnames_ptr,
-    SOAT           substantive_object_and_anchor_tags_struct,
-  ) {
-    string _text                = an_object["substantive"];
-    string lev_markup_number    = an_object["lev_markup_number"];
-    string lev_collapsed_number = an_object["lev_collapsed_number"];
-    string dummy_heading_status = an_object["dummy_heading_status"];
-    string is_                  = an_object["is"];
-    debug(asserts) {
-      static assert(is(typeof(lev)                                       == string));
-      static assert(is(typeof(obj_cite_digits.object_number)             == int));
-    }
-    assert(is_ == "heading");
-    assert((obj_cite_digits.object_number).to!int >= 0);
-    assert(
-      lev_markup_number.match(rgx.levels_numbered),
-      ("not a valid heading level: " ~ lev_markup_number ~ " at " ~ obj_cite_digits.object_number.to!string)
-    );
-    if (lev_markup_number.match(rgx.levels_numbered)) {
-      if (lev_markup_number.to!int == 0) {
-        // TODO first hit (of two) with this assertion failure, check, fix & reinstate
-        // assert(obj_cite_digits.object_number.to!int == 1,
-        //   "ERROR header lev markup number is: " ~
-        //   lev_markup_number.to!string ~
-        //   " obj_cite_digits.object_number.to!int should == 1 but is: " ~
-        //    obj_cite_digits.object_number.to!string ~
-        //   "\n" ~ _text);
-      }
-    }
-    switch (lev_markup_number.to!int) {
-    case 0:
-      lv = DocStructMarkupHeading.h_sect_A;
-      lv0 = obj_cite_digit;
-      lv1 = 0; lv2 = 0; lv3 = 0; lv4 = 0; lv5 = 0; lv6 = 0; lv7 = 0;
-      p_["lev_markup_number"] = 0;
-      p_["object_number"] = 0;
-      break;
-    case 1:
-      lv = DocStructMarkupHeading.h_sect_B;
-      lv1 = obj_cite_digit;
-      lv2 = 0; lv3 = 0; lv4 = 0; lv5 = 0; lv6 = 0; lv7 = 0;
-      p_["lev_markup_number"]
-        = DocStructMarkupHeading.h_sect_A;
-      p_["object_number"] = lv0;
-      break;
-    case 2:
-      lv = DocStructMarkupHeading.h_sect_C;
-      lv2 = obj_cite_digit;
-      lv3 = 0; lv4 = 0; lv5 = 0; lv6 = 0; lv7 = 0;
-      p_["lev_markup_number"]
-        = DocStructMarkupHeading.h_sect_B;
-      p_["object_number"] = lv1;
-      break;
-    case 3:
-      lv = DocStructMarkupHeading.h_sect_D;
-      lv3 = obj_cite_digit;
-      lv4 = 0; lv5 = 0; lv6 = 0; lv7 = 0;
-      p_["lev_markup_number"]
-        = DocStructMarkupHeading.h_sect_C;
-      p_["object_number"] = lv2;
-      break;
-    case 4:
-      lv = DocStructMarkupHeading.h_text_1;
-      lv4 = obj_cite_digit;
-      lv5 = 0; lv6 = 0; lv7 = 0;
-      if (lv3 > eN.bi.off) {
-        p_["lev_markup_number"]
-          = DocStructMarkupHeading.h_sect_D;
-        p_["object_number"] = lv3;
-      } else if (lv2 > eN.bi.off) {
-        p_["lev_markup_number"]
-          = DocStructMarkupHeading.h_sect_C;
-        p_["object_number"] = lv2;
-      } else if (lv1 > eN.bi.off) {
-        p_["lev_markup_number"]
-          = DocStructMarkupHeading.h_sect_B;
-        p_["object_number"] = lv1;
-      } else {
-        p_["lev_markup_number"]
-          = DocStructMarkupHeading.h_sect_A;
-        p_["object_number"] = lv0;
-      }
-      break;
-    case 5:
-      lv = DocStructMarkupHeading.h_text_2;
-      lv5 = obj_cite_digit;
-      lv6 = 0; lv7 = 0;
-      p_["lev_markup_number"]
-        = DocStructMarkupHeading.h_text_1;
-      p_["object_number"] = lv4;
-      break;
-    case 6:
-      lv = DocStructMarkupHeading.h_text_3;
-      lv6 = obj_cite_digit;
-      lv7 = 0;
-      p_["lev_markup_number"]
-        = DocStructMarkupHeading.h_text_2;
-      p_["object_number"] = lv5;
-      break;
-    case 7:
-      lv = DocStructMarkupHeading.h_text_4;
-      lv7 = obj_cite_digit;
-      p_["lev_markup_number"]
-        = DocStructMarkupHeading.h_text_3;
-      p_["object_number"] = lv6;
-      break;
-    default:
-      break;
-    }
-    ObjGenericComposite comp_obj_;
-    comp_obj_                                        = comp_obj_.init;
-    comp_obj_.metainfo.is_of_part                    = "body";
-    comp_obj_.metainfo.is_of_section                 = "body";
-    comp_obj_.metainfo.is_of_type                    = "para";
-    comp_obj_.metainfo.is_a                          = "heading";
-    comp_obj_.text                                   = _text.to!string.strip;
-    comp_obj_.metainfo.ocn                           = obj_cite_digits.object_number;
-    comp_obj_.metainfo.identifier                    = obj_cite_digits.identifier;
-    comp_obj_.metainfo.dummy_heading                 = (dummy_heading_status == "t") ? true: false;
-    comp_obj_.metainfo.object_number_off             = obj_cite_digits.off;
-    // comp_obj_.metainfo.o_n_book_index             = obj_cite_digits.bkidx;
-    comp_obj_.metainfo.object_number_type            = obj_cite_digits.type;
-    comp_obj_.tags.segment_anchor_tag_epub           = tag_in_seg["seg_lv1to4"];
-    comp_obj_.tags.anchor_tag_html                   = tag_in_seg["seg_lv4"];
-    comp_obj_.tags.in_segment_html                   = comp_obj_.tags.anchor_tag_html;
-    comp_obj_.tags.heading_lev_anchor_tag            = lev_anchor_tag;
-    comp_obj_.tags.html_segment_anchor_tag_is        = tag_in_seg["seg_lv4"];
-    comp_obj_.tags.epub_segment_anchor_tag_is        = tag_in_seg["seg_lv1to4"];
-    comp_obj_.metainfo.heading_lev_markup            = (!(lev_markup_number.empty) ? lev_markup_number.to!int : 0);
-    comp_obj_.metainfo.heading_lev_collapsed         = (!(lev_collapsed_number.empty) ? lev_collapsed_number.to!int : 0);
-    comp_obj_.metainfo.parent_ocn                    = p_["object_number"];
-    comp_obj_.metainfo.parent_lev_markup             = p_["lev_markup_number"];
-    comp_obj_.tags.heading_ancestors_text            = lv_ancestors_txt;
-    comp_obj_.ptr.doc_object                         = cntr_;
-    comp_obj_.ptr.html_segnames                      = ((lev_markup_number == "4") ? html_segnames_ptr : 0);
-    comp_obj_.ptr.heading                            = ptr_;
-    comp_obj_.has.inline_notes_reg                   = substantive_object_and_anchor_tags_struct.has_notes_reg;
-    comp_obj_.has.inline_notes_star                  = substantive_object_and_anchor_tags_struct.has_notes_star;
-    comp_obj_.has.inline_links                       = substantive_object_and_anchor_tags_struct.has_links;
-    tag_assoc[comp_obj_.tags.anchor_tag_html]["seg_lv4"]            = comp_obj_.tags.in_segment_html;
-    tag_assoc[comp_obj_.tags.segment_anchor_tag_epub]["seg_lv1to4"] = comp_obj_.tags.segment_anchor_tag_epub;
-    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_.metainfo.parent_lev_markup <= 7);
-    assert(comp_obj_.metainfo.parent_ocn >= 0);
-    if (lev_markup_number.match(rgx.levels_numbered_headings)) {
-      assert(comp_obj_.metainfo.heading_lev_markup <= 7);
-      assert(comp_obj_.metainfo.ocn >= 0);
-      if (comp_obj_.metainfo.parent_lev_markup > 0) {
-        assert(comp_obj_.metainfo.parent_lev_markup < comp_obj_.metainfo.heading_lev_markup);
-        if (comp_obj_.metainfo.ocn != 0) {
-          assert(comp_obj_.metainfo.parent_ocn < comp_obj_.metainfo.ocn);
-        }
-      }
-      if (comp_obj_.metainfo.heading_lev_markup == 0) {
-        assert(comp_obj_.metainfo.parent_lev_markup == DocStructMarkupHeading.h_sect_A);
-      } else if  (comp_obj_.metainfo.heading_lev_markup == DocStructMarkupHeading.h_sect_B) {
-        assert(comp_obj_.metainfo.parent_lev_markup == DocStructMarkupHeading.h_sect_A);
-      } else if  (comp_obj_.metainfo.heading_lev_markup == DocStructMarkupHeading.h_sect_C) {
-        assert(comp_obj_.metainfo.parent_lev_markup == DocStructMarkupHeading.h_sect_B);
-      } else if  (comp_obj_.metainfo.heading_lev_markup == DocStructMarkupHeading.h_sect_D) {
-        assert(comp_obj_.metainfo.parent_lev_markup == DocStructMarkupHeading.h_sect_C);
-      } else if  (comp_obj_.metainfo.heading_lev_markup == DocStructMarkupHeading.h_text_1) {
-        assert(comp_obj_.metainfo.parent_lev_markup <= DocStructMarkupHeading.h_sect_D);
-      } else if  (comp_obj_.metainfo.heading_lev_markup == DocStructMarkupHeading.h_text_2) {
-        assert(comp_obj_.metainfo.parent_lev_markup == DocStructMarkupHeading.h_text_1);
-      } else if  (comp_obj_.metainfo.heading_lev_markup == DocStructMarkupHeading.h_text_3) {
-        assert(comp_obj_.metainfo.parent_lev_markup == DocStructMarkupHeading.h_text_2);
-      } else if  (comp_obj_.metainfo.heading_lev_markup == DocStructMarkupHeading.h_text_4) {
-        assert(comp_obj_.metainfo.parent_lev_markup == DocStructMarkupHeading.h_text_3);
-      } else if  (comp_obj_.metainfo.heading_lev_markup == DocStructMarkupHeading.h_text_5) {
-      }
-    }
-    return comp_obj_;
-  }
-  invariant() {
-  }
-}
-// abstraction functions emitters ↑
-// ↓ abstraction functions assertions
-@safe pure void assertions_doc_structure()(
-  string[string]  an_object,
-  string          an_object_key,
-  int[string]     lv
-) {
-  string msg_error_doc_struct = "\nERROR in document structure, check markup (heading level relationships):\n";
-  if (lv["h3"] > eN.bi.off) {
-    assert(lv["h0"] > eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h1"] > eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h2"] > eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  } else if (lv["h2"] > eN.bi.off) {
-    assert(lv["h0"] > eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h1"] > eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h3"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  } else if (lv["h1"] > eN.bi.off) {
-    assert(lv["h0"] > eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h2"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h3"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  } else if (lv["h0"] > eN.bi.off) {
-    assert(lv["h1"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h2"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h3"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  } else {
-    assert(lv["h0"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h1"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h2"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h3"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  }
-  if (lv["h7"] > eN.bi.off) {
-    assert(lv["h4"] > eN.bi.off,
-      msg_error_doc_struct
-      ~ "missing segment level 1~\n"
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h5"] > eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h6"] > eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  } else if (lv["h6"] > eN.bi.off) {
-    assert(lv["h4"] > eN.bi.off,
-      msg_error_doc_struct
-      ~ "missing segment level 1~\n"
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h5"] > eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h7"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  } else if (lv["h5"] > eN.bi.off) {
-    assert(lv["h4"] > eN.bi.off,
-      msg_error_doc_struct
-      ~ "missing segment level 1~\n"
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h6"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h7"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  } else if (lv["h4"] > eN.bi.off) {
-    assert(lv["h5"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h6"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h7"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  } else {
-    assert(lv["h4"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ "missing segment level 1~\n"
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h5"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h6"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h7"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  }
-  if (lv["h0"] == eN.bi.off) {
-    assert(lv["h1"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h2"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h3"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h4"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ "missing segment level 1~\n"
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h5"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h6"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h7"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  }
-  if (lv["h1"] == eN.bi.off) {
-    assert(lv["h2"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h3"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  }
-  if (lv["h2"] == eN.bi.off) {
-    assert(lv["h3"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  }
-  if (lv["h3"] == eN.bi.off) {
-  }
-  if (lv["h4"] == eN.bi.off) {
-    assert(lv["h5"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h6"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h7"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  }
-  if (lv["h5"] == eN.bi.off) {
-    assert(lv["h6"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-    assert(lv["h7"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  }
-  if (lv["h6"] == eN.bi.off) {
-    assert(lv["h7"] == eN.bi.off,
-      msg_error_doc_struct
-      ~ an_object[an_object_key]
-    );
-  }
-  if (lv["h7"] == eN.bi.off) {
-  }
-  switch ((an_object["lev"]).to!string) {
-  case "A":
-    if (lv["h0"] == eN.bi.off) {
-      assert(lv["h1"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level A~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h2"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level A~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h3"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level A~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h4"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "missing segment level 1~\n"
-        ~ "at level A~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h5"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level A~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h6"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level A~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h7"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level A~\n"
-        ~ an_object[an_object_key]
-      );
-    } else {                       // (lv["h0"] > eN.bi.off)
-      assert(lv["h0"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "should not enter level A a second time\n"
-        ~ "at level A~\n"
-        ~ an_object[an_object_key]
-      );
-    }
-    break;
-  case "B":
-    if (lv["h1"] == eN.bi.off) {
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level B~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h2"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level B~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h3"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level B~\n"
-        ~ an_object[an_object_key]
-      );
-    } else {                       // (lv["h1"] > eN.bi.off)
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level B~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h1"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level B~\n"
-        ~ an_object[an_object_key]
-      );
-    }
-    break;
-  case "C":
-    if (lv["h2"] == eN.bi.off) {
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level C~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h1"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "level C should not follow level A\n"
-        ~ "at level C~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h3"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level C~\n"
-        ~ an_object[an_object_key]
-      );
-    } else {                       // (lv["h2"] > eN.bi.off)
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level C~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h1"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level C~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h2"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level C~\n"
-        ~ an_object[an_object_key]
-      );
-    }
-    break;
-  case "D":
-    if (lv["h3"] == eN.bi.off) {
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level D~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h1"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "level D should not follow level A\n"
-        ~ "at level D~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h2"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level D~\n"
-        ~ an_object[an_object_key]
-      );
-    } else {                      // (lv["h3"] > eN.bi.off)
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level D~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h1"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level D~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h2"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level D~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h3"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level D~\n"
-        ~ an_object[an_object_key]
-      );
-    }
-    break;
-  case "1":
-    if (lv["h4"] == eN.bi.off) {
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 1~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h5"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 1~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h6"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 1~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h7"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 1~\n"
-        ~ an_object[an_object_key]
-      );
-    } else {                      // (lv["h4"] > eN.bi.off)
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 1~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h4"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "missing segment level 1~ ?\n"
-        ~ "at level 1~\n"
-        ~ an_object[an_object_key]
-      );
-    }
-    break;
-  case "2":
-    if (lv["h5"] == eN.bi.off) {
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 2~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h4"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "missing segment level 1~ ?\n"
-        ~ "at level 2~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h6"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 2~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h7"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 2~\n"
-        ~ an_object[an_object_key]
-      );
-    } else {                      // (lv["h5"] > eN.bi.off)
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 2~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h4"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "missing segment level 1~ ?\n"
-        ~ "at level 2~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h5"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 2~\n"
-        ~ an_object[an_object_key]
-      );
-    }
-    break;
-  case "3":
-    if (lv["h6"] == eN.bi.off) {
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 3~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h4"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "missing segment level 1~ ?\n"
-        ~ "at level 3~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h5"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "missing segment level 2~ ?\n"
-        ~ "at level 3~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h7"] == eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 3~\n"
-        ~ an_object[an_object_key]
-      );
-    } else {                      // (lv["h6"] > eN.bi.off)
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 3~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h4"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "missing segment level 1~ ?\n"
-        ~ "at level 3~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h5"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 3~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h6"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 3~\n"
-        ~ an_object[an_object_key]
-      );
-    }
-    break;
-  case "4":
-    if (lv["h7"] == eN.bi.off) {
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 4~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h4"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "missing segment level 1~ ?\n"
-        ~ "at level 4~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h5"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "missing segment level 2~ ?\n"
-        ~ "at level 4~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h6"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "missing segment level 3~ ?\n"
-        ~ "at level 4~\n"
-        ~ an_object[an_object_key]
-      );
-    } else {                      // (lv["h7"] > eN.bi.off)
-      assert(lv["h0"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 4~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h4"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "missing segment level 1~ ?\n"
-        ~ "at level 4~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h5"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 4~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h6"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 4~\n"
-        ~ an_object[an_object_key]
-      );
-      assert(lv["h7"] > eN.bi.off,
-        msg_error_doc_struct
-        ~ "at level 4~\n"
-        ~ an_object[an_object_key]
-      );
-    }
-    break;
-  default:
-    break;
-  }
+// the doc to be returned
+struct ST_docAbstraction {
+  ObjGenericComposite[][string] document_the;
+  DocHas_                       doc_has;
 }
-// abstraction functions assertions ↑
-#+END_SRC
-
-* template docSectKeysSeq
-
-#+NAME: docSectKeysSeq
-#+HEADER: :noweb yes
-#+BEGIN_SRC d
-@safe auto docSectKeysSeq(string[][string] document_section_keys_sequenced) {
-  struct doc_sect_keys_seq {
-    string[] scroll() {
-      return document_section_keys_sequenced["scroll"];
-    }
-    string[] seg() {
-      return document_section_keys_sequenced["seg"];
-    }
-    string[] sql() {
-      return document_section_keys_sequenced["sql"];
-    }
-    string[] latex() {
-      return document_section_keys_sequenced["latex"];
-    }
-  }
-  return doc_sect_keys_seq();
+ST_docAbstraction ret;
+{
+  ret.document_the = document_the;
+  ret.doc_has      = doc_has;
 }
+return ret;
 #+END_SRC
 
 * document header including copyright & license