0.26.3 object info changes

1 files changed, 199 insertions, 199 deletions

diff --git a/org/output_xmls.org b/org/output_xmls.org
index 7b86093..eb0e263 100644
--- a/org/output_xmls.org
+++ b/org/output_xmls.org
@@ -107,7 +107,7 @@ string special_characters(O)(
     .replaceAll(rgx.xhtml_less_than,    "<")
     .replaceAll(rgx.xhtml_greater_than, ">")
     .replaceAll(rgx.nbsp_char,          " ");
-  if (!(obj.is_a == "code")) {
+  if (!(obj.typeinfo.is_a == "code")) {
     _txt = (_txt)
       .replaceAll(rgx.xhtml_line_break,   "<br />");
   }
@@ -455,7 +455,7 @@ auto inline_links(O)(
   string                  _suffix    = ".html",
   string                  _xml_type = "seg",
 ) {
-  if (obj.inline_links) {
+  if (obj.has.inline_links) {
     if ((_txt.match(rgx.mark_internal_site_lnk))
     && (_xml_type == "scroll")) { // conditions reversed to avoid: gdc compiled program run segfault
       _txt = (_txt).replaceAll(
@@ -477,8 +477,8 @@ auto inline_links(O)(
     if (_txt.match(rgx.inline_link)) {
       writeln(__LINE__,
         " (missed) markup link identified (",
-        obj.inline_links,
-        "): ", obj.is_a, ": ",
+        obj.has.inline_links,
+        "): ", obj.typeinfo.is_a, ": ",
         obj.text
       );
     }
@@ -487,8 +487,8 @@ auto inline_links(O)(
     if (_txt.match(rgx.inline_link)) {
       writeln(__LINE__,
         " (missed) markup link identified (",
-        obj.inline_links,
-        "): ", obj.is_a, ": ",
+        obj.has.inline_links,
+        "): ", obj.typeinfo.is_a, ": ",
         obj.text
       );
     }
@@ -505,7 +505,7 @@ auto inline_notes_scroll(O)(
   auto return ref const O   obj,
   string                    _txt,
 ) {
-  if (obj.inline_notes_reg) {
+  if (obj.has.inline_notes_reg) {
     _txt = font_face(_txt);
     _txt = (_txt).replaceAll(
       rgx.inline_notes_delimiter_al_regular_number_note,
@@ -514,12 +514,12 @@ auto inline_notes_scroll(O)(
   }
   debug(markup_endnotes) {
     if (_txt.match(rgx.inline_notes_delimiter_al_regular_number_note)) {
-      writeln(__LINE__, " (missed) markup endnote: ", obj.is_a, ": ", obj.text);
+      writeln(__LINE__, " (missed) markup endnote: ", obj.typeinfo.is_a, ": ", obj.text);
     }
   }
   debug(markup) {
     if (_txt.match(rgx.inline_notes_delimiter_al_regular_number_note)) {
-      writeln(__LINE__, " (missed) markup endnote: ", obj.is_a, ": ", obj.text);
+      writeln(__LINE__, " (missed) markup endnote: ", obj.typeinfo.is_a, ": ", obj.text);
     }
   }
   return _txt;
@@ -535,7 +535,7 @@ auto inline_notes_seg(O)(
   string                      _txt,
 ) {
   string[] _endnotes;
-  if (obj.inline_notes_reg) {
+  if (obj.has.inline_notes_reg) {
     _txt = font_face(_txt);
     /+ need markup for text, and separated footnote +/
     foreach(m; _txt.matchAll(rgx.inline_notes_delimiter_al_regular_number_note)) {
@@ -560,7 +560,7 @@ auto inline_notes_seg(O)(
     );
   } else if (_txt.match(rgx.inline_notes_delimiter_al_regular_number_note)) {
     debug(markup) {
-      writeln(__LINE__, " endnote: ", obj.is_a, ": ", obj.text);
+      writeln(__LINE__, " endnote: ", obj.typeinfo.is_a, ": ", obj.text);
     }
   }
   auto t = tuple(
@@ -614,7 +614,7 @@ string lev4_heading_subtoc(O)(
 ) {
   char[] lev4_subtoc;
   lev4_subtoc ~= "  <div class=\"nav\">\n";
-  foreach (subtoc; obj.lev4_subtoc) {
+  foreach (subtoc; obj.tags.lev4_subtoc) {
     if (auto m = subtoc.match(rgx.inline_link_subtoc)) {
       auto indent = m.captures[1].to!string;
       auto text = m.captures[2].to!string;
@@ -645,7 +645,7 @@ auto nav_pre_next_svg(O)(
   auto return ref const O    obj,
 ) {
   string prev, next, toc;
-  if (obj.segment_anchor_tag == "toc") {
+  if (obj.tags.segment_anchor_tag == "toc") {
     toc = "";
     prev = "";
   } else {
@@ -658,7 +658,7 @@ auto nav_pre_next_svg(O)(
         </a>¶",
     );
   }
-  if (obj.segname_prev == "") {
+  if (obj.tags.segname_prev == "") {
     prev = "";
   } else {
     prev = format(q"¶<a href="%s.html" target="_top">
@@ -668,10 +668,10 @@ auto nav_pre_next_svg(O)(
             </svg>
           </div>
         </a>¶",
-      obj.segname_prev,
+      obj.tags.segname_prev,
     );
   }
-  if (obj.segname_next == "") {
+  if (obj.tags.segname_next == "") {
     next = "";
   } else {
     next = format(q"¶<a href="%s.html" target="_top">
@@ -681,7 +681,7 @@ auto nav_pre_next_svg(O)(
             </svg>
           </div>
         </a>¶",
-      obj.segname_next,
+      obj.tags.segname_next,
     );
   }
   string _toc_pre_next = format(q"¶        <div class="flex-menu-option">
@@ -730,15 +730,15 @@ auto heading(O)(
   string                     _txt,
   string                     _xml_type = "html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   string _horizontal_rule = "<hr />";
   if ((_xml_type != "html")
-  || (obj.heading_lev_markup == 0 || obj.heading_lev_markup > 4)) {
+  || (obj.node.heading_lev_markup == 0 || obj.node.heading_lev_markup > 4)) {
     _horizontal_rule = "";
   }
   _txt = font_face(_txt);
   string o;
-  if (obj.obj_cite_number.empty) {
+  if (obj.node.obj_cite_number.empty) {
     o = format(q"¶%s
   <div class="substance">
     <h%s class="%s">%s
@@ -746,11 +746,11 @@ auto heading(O)(
     </h%s>
   </div>¶",
       _horizontal_rule,
-      obj.heading_lev_markup,
-      obj.is_a,
+      obj.node.heading_lev_markup,
+      obj.typeinfo.is_a,
       tags,
       _txt,
-      obj.heading_lev_markup,
+      obj.node.heading_lev_markup,
     );
   } else {
     o = format(q"¶%s
@@ -761,15 +761,15 @@ auto heading(O)(
     </h%s>
   </div>¶",
     _horizontal_rule,
-    obj.obj_cite_number,
-    obj.obj_cite_number,
-    obj.heading_lev_markup,
-    obj.is_a,
-    obj.obj_cite_number,
-    obj.obj_cite_number,
+    obj.node.obj_cite_number,
+    obj.node.obj_cite_number,
+    obj.node.heading_lev_markup,
+    obj.typeinfo.is_a,
+    obj.node.obj_cite_number,
+    obj.node.obj_cite_number,
     tags,
     _txt,
-    obj.heading_lev_markup,
+    obj.node.heading_lev_markup,
     );
   }
   return o;
@@ -785,7 +785,7 @@ auto heading_scroll(O)(
   string                     _txt,
   string                     _suffix = ".html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = inline_markup_scroll(obj, _txt, _suffix);
   string o = heading(obj, _txt);
   return o;
@@ -823,19 +823,19 @@ auto para(O)(
   auto return ref const O    obj,
   string                     _txt,
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = font_face(_txt);
   string o;
-  _txt = (obj.bullet) ? ("●&#160;&#160;" ~ _txt) : _txt;
-  if (obj.obj_cite_number.empty) {
+  _txt = (obj.attrib.bullet) ? ("●&#160;&#160;" ~ _txt) : _txt;
+  if (obj.node.obj_cite_number.empty) {
     o = format(q"¶  <div class="substance">
   <p class="%s" indent="h%si%s">%s
     %s
   </p>
 </div>¶",
-      obj.is_a,
-      obj.indent_hang,
-      obj.indent_base,
+      obj.typeinfo.is_a,
+      obj.attrib.indent_hang,
+      obj.attrib.indent_base,
       tags,
       _txt
     );
@@ -846,12 +846,12 @@ auto para(O)(
     %s
   </p>
 </div>¶",
-      obj.obj_cite_number,
-      obj.obj_cite_number,
-      obj.is_a,
-      obj.indent_hang,
-      obj.indent_base,
-      obj.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.typeinfo.is_a,
+      obj.attrib.indent_hang,
+      obj.attrib.indent_base,
+      obj.node.obj_cite_number,
       tags,
       _txt
     );
@@ -869,7 +869,7 @@ auto para_scroll(O)(
   string                     _txt,
   string                     _suffix = ".html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = inline_markup_scroll(obj, _txt, _suffix);
   string o = para(obj, _txt);
   return o;
@@ -909,13 +909,13 @@ auto quote(O)(
 ) {
   _txt = font_face(_txt);
   string o;
-  if (obj.obj_cite_number.empty) {
+  if (obj.node.obj_cite_number.empty) {
     o = format(q"¶  <div class="substance">
   <p class="%s">
     %s
   </p>
 </div>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt
     );
   } else {
@@ -925,10 +925,10 @@ auto quote(O)(
     %s
   </p>
 </div>¶",
-      obj.obj_cite_number,
-      obj.obj_cite_number,
-      obj.is_a,
-      obj.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.typeinfo.is_a,
+      obj.node.obj_cite_number,
       _txt
     );
   }
@@ -945,7 +945,7 @@ auto quote_scroll(O)(
   string                     _txt,
   string                     _suffix = ".html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = inline_markup_scroll(obj, _txt, _suffix);
   string o = quote(obj, _txt);
   return o;
@@ -985,13 +985,13 @@ auto group(O)(
 ) {
   _txt = font_face(_txt);
   string o;
-  if (obj.obj_cite_number.empty) {
+  if (obj.node.obj_cite_number.empty) {
     o = format(q"¶  <div class="substance">
   <p class="%s">
     %s
   </p>
 </div>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt
     );
   } else {
@@ -1001,10 +1001,10 @@ auto group(O)(
     %s
   </p>
 </div>¶",
-      obj.obj_cite_number,
-      obj.obj_cite_number,
-      obj.is_a,
-      obj.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.typeinfo.is_a,
+      obj.node.obj_cite_number,
       _txt
     );
   }
@@ -1022,7 +1022,7 @@ auto group_scroll(O)(
   string                     _suffix = ".html",
   string                     _xml_type = "html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = inline_markup_scroll(obj, _txt, _suffix);
   string o = group(obj, _txt);
   return o;
@@ -1062,11 +1062,11 @@ auto block(O)(
 ) {
   _txt = font_face(_txt);
   string o;
-  if (obj.obj_cite_number.empty) {
+  if (obj.node.obj_cite_number.empty) {
     o = format(q"¶  <div class="substance">
   <p class="%s">%s</p>
 </div>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt.stripRight
     );
   } else {
@@ -1074,10 +1074,10 @@ auto block(O)(
   <label class="ocn"><a href="#%s" class="lnkocn">%s</a></label>
   <p class="%s" id="%s">%s</p>
 </div>¶",
-      obj.obj_cite_number,
-      obj.obj_cite_number,
-      obj.is_a,
-      obj.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.typeinfo.is_a,
+      obj.node.obj_cite_number,
       _txt.stripRight
     );
   }
@@ -1095,7 +1095,7 @@ auto block_scroll(O)(
   string                     _suffix = ".html",
   string                     _xml_type = "html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = inline_markup_scroll(obj, _txt, _suffix);
   string o = block(obj, _txt);
   return o;
@@ -1135,11 +1135,11 @@ auto verse(O)(
 ) {
   _txt = font_face(_txt);
   string o;
-  if (obj.obj_cite_number.empty) {
+  if (obj.node.obj_cite_number.empty) {
       o = format(q"¶  <div class="substance">
         <p class="%s">%s</p>
     </div>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt
     );
   } else {
@@ -1147,10 +1147,10 @@ auto verse(O)(
       <label class="ocn"><a href="#%s" class="lnkocn">%s</a></label>
       <p class="%s" id="%s">%s</p>
     </div>¶",
-      obj.obj_cite_number,
-      obj.obj_cite_number,
-      obj.is_a,
-      obj.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.typeinfo.is_a,
+      obj.node.obj_cite_number,
       _txt
     );
   }
@@ -1168,7 +1168,7 @@ auto verse_scroll(O)(
   string                     _suffix = ".html",
   string                     _xml_type = "html",
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = inline_markup_scroll(obj, _txt, _suffix);
   string o = verse(obj, _txt);
   return o;
@@ -1206,11 +1206,11 @@ auto code(O)(
   string                   _txt,
 ) {
   string o;
-  if (obj.obj_cite_number.empty) {
+  if (obj.node.obj_cite_number.empty) {
       o = format(q"¶  <div class="substance">
     <p class="%s">%s</p>
 </div>¶",
-      obj.is_a,
+      obj.typeinfo.is_a,
       _txt
     );
   } else {
@@ -1218,10 +1218,10 @@ auto code(O)(
   <label class="ocn"><a href="#%s" class="lnkocn">%s</a></label>
   <p class="%s" id="%s">%s</p>
 </div>¶",
-      obj.obj_cite_number,
-      obj.obj_cite_number,
-      obj.is_a,
-      obj.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.node.obj_cite_number,
+      obj.typeinfo.is_a,
+      obj.node.obj_cite_number,
       _txt
     );
   }
@@ -1258,11 +1258,11 @@ auto tablarize(O)(
         && (_table_rows.length <= row_idx+2)) {
           _tablenote ~= cell;
         } else {
-          string _col_is = (row_idx == 0 && obj.table_heading) ? "th" : "td";
+          string _col_is = (row_idx == 0 && obj.table.heading) ? "th" : "td";
           string _align = ("style=\"text-align:"
-          ~ ((obj.table_column_aligns[col_idx] == "l")
+          ~ ((obj.table.column_aligns[col_idx] == "l")
           ? "left\"" : "right\""));
-          _table ~= "<" ~ _col_is ~ " width=\"" ~ obj.table_column_widths[col_idx].to!string ~ "%\" " ~ _align ~ ">";
+          _table ~= "<" ~ _col_is ~ " width=\"" ~ obj.table.column_widths[col_idx].to!string ~ "%\" " ~ _align ~ ">";
           _table ~= cell;
           _table ~= "</" ~ _col_is ~ ">";
         }
@@ -1285,7 +1285,7 @@ auto table(O)(
   auto return ref const O    obj,
   string                     _txt,
 ) {
-  auto tags = _xhtml_anchor_tags(obj.anchor_tags);
+  auto tags = _xhtml_anchor_tags(obj.tags.anchor_tags);
   _txt = font_face(_txt);
   auto t = tablarize(obj, _txt);
   _txt = t[0];
@@ -1300,10 +1300,10 @@ auto table(O)(
     %s
   </p>
 </div>¶",
-    obj.obj_cite_number,
-    obj.obj_cite_number,
-    obj.is_a,
-    obj.obj_cite_number,
+    obj.node.obj_cite_number,
+    obj.node.obj_cite_number,
+    obj.typeinfo.is_a,
+    obj.node.obj_cite_number,
     tags,
     _txt,
     _note
@@ -1324,9 +1324,9 @@ auto endnote(O)(
   o = format(q"¶    <p class="%s" indent="h%si%s">
   %s
 </p>¶",
-    obj.is_a,
-    obj.indent_hang,
-    obj.indent_base,
+    obj.typeinfo.is_a,
+    obj.attrib.indent_hang,
+    obj.attrib.indent_base,
     _txt
   );
   return o;
@@ -1349,7 +1349,7 @@ template outputHTML() {
 #+END_SRC
 
 ** scroll                                                           :scroll:
-*** switch (sections & objects) format html output
+*** ↻ loop & switch (sections & objects) format html output
 
 #+name: output_html_scroll
 #+BEGIN_SRC d
@@ -1369,11 +1369,11 @@ void scroll(D,I)(
     foreach (obj; doc_abstraction[part]) {
       delimit = xhtml_format.div_delimit(part, previous_part);
       string _txt = xhtml_format.special_characters(obj, obj.text);
-      switch (obj.of_part) {
+      switch (obj.typeinfo.of_part) {
       case "frontmatter":              assert(part == "head" || "toc_scroll");
-        switch (obj.is_of) {
+        switch (obj.typeinfo.is_of) {
         case "para":
-          switch (obj.is_a) {
+          switch (obj.typeinfo.is_a) {
           case "heading":
             doc_html ~= delimit ~ xhtml_format.heading_scroll(obj, _txt, suffix);
             break;
@@ -1382,22 +1382,22 @@ void scroll(D,I)(
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
             }
             break;
           }
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
           }
           break;
         }
         break;
       case "body":                     assert(part == "body" || "head"); // surprise
-        switch (obj.is_of) {
+        switch (obj.typeinfo.is_of) {
         case "para":
-          switch (obj.is_a) {
+          switch (obj.typeinfo.is_a) {
           case "heading":
             doc_html ~= delimit ~ xhtml_format.heading_scroll(obj, _txt, suffix);
             break;
@@ -1406,13 +1406,13 @@ void scroll(D,I)(
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
             }
             break;
           }
           break;
         case "block":
-          switch (obj.is_a) {
+          switch (obj.typeinfo.is_a) {
           case "quote":
             doc_html ~= xhtml_format.quote_scroll(obj, _txt);
             break;
@@ -1435,23 +1435,23 @@ void scroll(D,I)(
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
             }
             break;
           }
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
           }
           break;
         }
         break;
       case "backmatter":
         assert(part == "endnotes" || "glossary" || "bibliography" || "bookindex_scroll" || "blurb" || "tail");
-        switch (obj.is_of) {
+        switch (obj.typeinfo.is_of) {
         case "para":
-          switch (obj.is_a) {
+          switch (obj.typeinfo.is_a) {
           case "heading":
             doc_html ~= delimit ~ xhtml_format.heading_scroll(obj, _txt, suffix);
             break;
@@ -1472,14 +1472,14 @@ void scroll(D,I)(
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
             }
             break;
           }
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
           }
           break;
         }
@@ -1488,8 +1488,8 @@ void scroll(D,I)(
         break;
       default:
         if ((doc_matters.opt.action.debug_do)) {
-          writeln(__FILE__, ":", __LINE__, ": ", obj.of_part);
-          writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+          writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.of_part);
+          writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
           writeln(__FILE__, ":", __LINE__, ": ", obj.text);
         }
         break;
@@ -1530,7 +1530,7 @@ void scroll_write_output(M,C)(
 #+END_SRC
 
 ** seg                                                                 :seg:
-*** switch (sections & objects) format html output
+*** ↻ loop & switch (sections & objects) format html output
 
 #+name: output_html_seg
 #+BEGIN_SRC d
@@ -1554,12 +1554,12 @@ void seg(D,M)(
     foreach (obj; doc_abstraction[part]) {
       delimit = xhtml_format.div_delimit(part, previous_part);
       string _txt = xhtml_format.special_characters(obj, obj.text);
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         assert(part == "head" || "toc_seg" || "body" || "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-        switch (obj.heading_lev_markup) {
+        switch (obj.node.heading_lev_markup) {
         case 0: .. case 3:
           /+ fill buffer, and replace with new levels from 1 to 3 +/
-          switch (obj.heading_lev_markup) {
+          switch (obj.node.heading_lev_markup) {
           case 0:
             top_level_headings[0] = "";
             top_level_headings[1] = "";
@@ -1580,12 +1580,12 @@ void seg(D,M)(
             goto default;
           default:
             auto t = xhtml_format.heading_seg(obj, _txt, suffix, "seg");
-            top_level_headings[obj.heading_lev_markup] = t[0];
+            top_level_headings[obj.node.heading_lev_markup] = t[0];
             break;
           }
           break;
         case 4:
-          segment_filename = obj.segment_anchor_tag;
+          segment_filename = obj.tags.segment_anchor_tag;
           doc_html[segment_filename] ~= xhtml_format.html_head(doc_matters, "seg");
           auto navigation_bar = xhtml_format.nav_pre_next_svg(obj);
           doc_html[segment_filename] ~= navigation_bar.toc_pre_next; // navigation bar
@@ -1606,45 +1606,45 @@ void seg(D,M)(
           break;
         case 8: .. case 9:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a, ": ", obj.heading_lev_markup);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a, ": ", obj.node.heading_lev_markup);
             writeln(__FILE__, ":", __LINE__, ": ", obj.text);
           }
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a, ": ", obj.heading_lev_markup);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a, ": ", obj.node.heading_lev_markup);
           }
           break;
         }
       } else {
         assert(part == "head" || "toc_seg" || "body" || "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-        switch (obj.of_part) {
+        switch (obj.typeinfo.of_part) {
         case "frontmatter":             assert(part == "head" || "toc_seg");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "toc":
               auto t = xhtml_format.para_seg(obj, _txt, suffix, "seg");
               doc_html[segment_filename] ~= t[0].to!string;
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
             }
             break;
           }
           break;
         case "body":                    assert(part == "body");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "para":
               auto t = xhtml_format.para_seg(obj, _txt, suffix, "seg");
               doc_html[segment_filename] ~= t[0].to!string;
@@ -1652,13 +1652,13 @@ void seg(D,M)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           case "block":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "quote":
               auto t = xhtml_format.quote_seg(obj, _txt, suffix, "seg");
               doc_html[segment_filename] ~= t[0].to!string;
@@ -1690,23 +1690,23 @@ void seg(D,M)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
           break;
         case "backmatter":
           assert(part == "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "endnote":             assert(part == "endnotes");
               auto t = xhtml_format.para_seg(obj, _txt, suffix, "seg");
               doc_html[segment_filename] ~= t[0];
@@ -1733,14 +1733,14 @@ void seg(D,M)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
@@ -1749,7 +1749,7 @@ void seg(D,M)(
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.of_part);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.of_part);
           }
           break;
         }
@@ -2004,20 +2004,20 @@ string epub3_oebps_content(D,I,P)(D doc_abstraction, I doc_matters, P parts) {
   debug(epubmanifest) {
     foreach (s; doc_matters.xml.keys_seq.seg) {
       foreach (obj; doc_abstraction[s]) {
-        if (obj.is_a == "heading") {
-          if (obj.heading_lev_markup == 4) {
+        if (obj.typeinfo.is_a == "heading") {
+          if (obj.node.heading_lev_markup == 4) {
             writefln(
               "%s~ [%s.xhtml] %s",
               obj.marked_up_level,
-              obj.segment_anchor_tag,
+              obj.tags.segment_anchor_tag,
               obj.text
             );
-          } else if (obj.heading_lev_markup > 4) {
+          } else if (obj.node.heading_lev_markup > 4) {
             writefln(
               "%s~ [%s.xhtml#%s] %s",
               obj.marked_up_level,
-              obj.segment_anchor_tag,
-              obj.obj_cite_number,
+              obj.tags.segment_anchor_tag,
+              obj.node.obj_cite_number,
               obj.text
             );
           }
@@ -2054,49 +2054,49 @@ string epub3_oebps_toc_nav_xhtml(D,I)(D doc_abstraction, I doc_matters) {
   );
   foreach (sect; doc_matters.xml.keys_seq.seg) {
     foreach (obj; doc_abstraction[sect]) {
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         string _txt = obj.text.replaceAll(rgx.inline_notes_al_gen, "").strip;
         foreach_reverse (n; 0 .. 7) {
           string k = n.to!string;
-          switch (obj.dom_collapsed[n]) {
+          switch (obj.node.dom_collapsed[n]) {
           case DomTags.close :
             toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "</li>" ~ "\n";
             toc ~= markup.indent_by_spaces_provided(n, "  ") ~ "</ol>" ~ "\n";
             break;
           case DomTags.close_and_open :
             toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "</li>" ~ "\n";
-            if  (obj.heading_lev_markup < 4) {
+            if  (obj.node.heading_lev_markup < 4) {
               toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "<li>" ~ "\n"
               ~ markup.indent_by_spaces_provided((n + 2), "  ")
-              ~ "<a href=\"" ~ obj.segment_anchor_tag ~ ".xhtml" ~ "\">"
+              ~ "<a href=\"" ~ obj.tags.segment_anchor_tag ~ ".xhtml" ~ "\">"
               ~ _txt
               ~ "</a>" ~ "\n";
             } else {
-              string hashtag =(obj.heading_lev_markup == 4)
+              string hashtag =(obj.node.heading_lev_markup == 4)
               ? ""
-              : ("#" ~ obj.ocn.to!string);
+              : ("#" ~ obj.node.ocn.to!string);
               toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "<li>" ~ "\n"
               ~ markup.indent_by_spaces_provided((n + 2), "  ")
-              ~ "<a href=\"" ~ obj.segment_anchor_tag ~ ".xhtml" ~ hashtag ~ "\">"
+              ~ "<a href=\"" ~ obj.tags.segment_anchor_tag ~ ".xhtml" ~ hashtag ~ "\">"
               ~ _txt
               ~ "</a>" ~ "\n";
             }
             break;
           case DomTags.open :
             toc ~= markup.indent_by_spaces_provided(n, "  ") ~ "<ol>" ~ "\n";
-            if  (obj.heading_lev_markup < 4) {
+            if  (obj.node.heading_lev_markup < 4) {
               toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "<li>" ~ "\n"
               ~ markup.indent_by_spaces_provided((n + 2), "  ")
-              ~ "<a href=\"" ~ obj.segment_anchor_tag ~ ".xhtml" ~ "\">"
+              ~ "<a href=\"" ~ obj.tags.segment_anchor_tag ~ ".xhtml" ~ "\">"
               ~ _txt
               ~ "</a>" ~ "\n";
             } else {
-              string hashtag =(obj.heading_lev_markup == 4)
+              string hashtag =(obj.node.heading_lev_markup == 4)
               ? ""
-              : ("#" ~ obj.ocn.to!string);
+              : ("#" ~ obj.node.ocn.to!string);
               toc ~= markup.indent_by_spaces_provided((n + 1), "  ") ~ "<li>" ~ "\n"
               ~ markup.indent_by_spaces_provided((n + 2), "  ")
-              ~ "<a href=\"" ~ obj.segment_anchor_tag ~ ".xhtml" ~ hashtag ~ "\">"
+              ~ "<a href=\"" ~ obj.tags.segment_anchor_tag ~ ".xhtml" ~ hashtag ~ "\">"
               ~ _txt
               ~ "</a>" ~ "\n";
             }
@@ -2160,11 +2160,11 @@ string epub2_oebps_toc_ncx(D,I)(D doc_abstraction, I doc_matters) {
   );
   foreach (sect; doc_matters.xml.keys_seq.seg) {
     foreach (obj; doc_abstraction[sect]) {
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         string _txt = obj.text.replaceAll(rgx.inline_notes_al_gen, "").strip;
-        string hashtag =(obj.heading_lev_markup <= 4) ? "" : ("#" ~ obj.ocn.to!string);
+        string hashtag =(obj.node.heading_lev_markup <= 4) ? "" : ("#" ~ obj.node.ocn.to!string);
         foreach_reverse (k; 0 .. 7) {
-          switch (obj.dom_markedup[k]) {
+          switch (obj.node.dom_markedup[k]) {
           case DomTags.close :
             toc ~= "\n    </navPoint>";
             break;
@@ -2179,7 +2179,7 @@ string epub2_oebps_toc_ncx(D,I)(D doc_abstraction, I doc_matters) {
     <content src="%s.xhtml%s" />¶",
               counter,
               _txt,
-              obj.segment_anchor_tag,
+              obj.tags.segment_anchor_tag,
               hashtag,
             );
             break;
@@ -2193,7 +2193,7 @@ string epub2_oebps_toc_ncx(D,I)(D doc_abstraction, I doc_matters) {
     <content src="%s.xhtml%s" />¶",
               counter,
               _txt,
-              obj.segment_anchor_tag,
+              obj.tags.segment_anchor_tag,
               hashtag,
             );
             break;
@@ -2211,7 +2211,7 @@ string epub2_oebps_toc_ncx(D,I)(D doc_abstraction, I doc_matters) {
 #+END_SRC
 
 ** the document contents                                               :seg:
-*** switch (sections & objects) format epub3 xhtml output
+*** ↻ loop & switch (sections & objects) format epub3 xhtml output
 
 #+name: output_epub3_xhtml_seg
 #+BEGIN_SRC d
@@ -2233,12 +2233,12 @@ void outputEPub3(D,I)(
   foreach (part; doc_matters.xml.keys_seq.seg) {
     foreach (obj; doc_abstraction[part]) {
       string _txt = xhtml_format.special_characters(obj, obj.text);
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         assert(part == "head" || "toc_seg" || "body" || "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-        switch (obj.heading_lev_markup) {
+        switch (obj.node.heading_lev_markup) {
         case 0: .. case 3:
           /+ fill buffer, and replace with new levels from 1 to 3 +/
-          switch (obj.heading_lev_markup) {
+          switch (obj.node.heading_lev_markup) {
           case 0:
             top_level_headings[0] = "";
             top_level_headings[1] = "";
@@ -2258,16 +2258,16 @@ void outputEPub3(D,I)(
             top_level_headings[3] = "";
             goto default;
           default:
-            doc_parts_ ~= obj.segment_anchor_tag;
-            doc_epub3[obj.segment_anchor_tag] ~= xhtml_format.epub3_seg_head(doc_matters);
+            doc_parts_ ~= obj.tags.segment_anchor_tag;
+            doc_epub3[obj.tags.segment_anchor_tag] ~= xhtml_format.epub3_seg_head(doc_matters);
             auto t = xhtml_format.heading_seg(obj, _txt, suffix, "epub");
-            doc_epub3[obj.segment_anchor_tag] ~= t[0];
-            doc_epub3_endnotes[obj.segment_anchor_tag] ~= t[1];
+            doc_epub3[obj.tags.segment_anchor_tag] ~= t[0];
+            doc_epub3_endnotes[obj.tags.segment_anchor_tag] ~= t[1];
             break;
           }
           break;
         case 4:
-          segment_filename = obj.segment_anchor_tag;
+          segment_filename = obj.tags.segment_anchor_tag;
           doc_epub3[segment_filename] ~= xhtml_format.epub3_seg_head(doc_matters);
           auto t = xhtml_format.heading_seg(obj, _txt, suffix, "epub");
           doc_epub3[segment_filename] ~= t[0];
@@ -2280,23 +2280,23 @@ void outputEPub3(D,I)(
           break;
         case 8: .. case 9:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a, ": ", obj.heading_lev_markup);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a, ": ", obj.node.heading_lev_markup);
             writeln(__FILE__, ":", __LINE__, ": ", obj.text);
           }
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.is_a, ": ", obj.heading_lev_markup);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a, ": ", obj.node.heading_lev_markup);
           }
           break;
         }
       } else {
         assert(part == "head" || "toc_seg" || "body" || "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-        switch (obj.of_part) {
+        switch (obj.typeinfo.of_part) {
         case "frontmatter":             assert(part == "head" || "toc_seg");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "toc":
               auto t = xhtml_format.para_seg(obj, _txt, suffix, "epub");
               doc_epub3[segment_filename] ~= t[0];
@@ -2304,22 +2304,22 @@ void outputEPub3(D,I)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
           break;
         case "body":                    assert(part == "body");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "para":
               auto t = xhtml_format.para_seg(obj, _txt, suffix, "epub");
               doc_epub3[segment_filename] ~= t[0];
@@ -2327,13 +2327,13 @@ void outputEPub3(D,I)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           case "block":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "quote":
               auto t = xhtml_format.quote_seg(obj, _txt, suffix, "epub");
               doc_epub3[segment_filename] ~= t[0].to!string;
@@ -2365,23 +2365,23 @@ void outputEPub3(D,I)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
           break;
         case "backmatter":
           assert(part == "endnotes" || "glossary" || "bibliography" || "bookindex_seg" || "blurb" || "tail");
-          switch (obj.is_of) {
+          switch (obj.typeinfo.is_of) {
           case "para":
-            switch (obj.is_a) {
+            switch (obj.typeinfo.is_a) {
             case "endnote":             assert(part == "endnotes");
               auto t = xhtml_format.para_seg(obj, _txt, suffix, "epub");
               doc_epub3[segment_filename] ~= t[0];
@@ -2408,14 +2408,14 @@ void outputEPub3(D,I)(
               break;
             default:
               if ((doc_matters.opt.action.debug_do)) {
-                writeln(__FILE__, ":", __LINE__, ": ", obj.is_a);
+                writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_a);
               }
               break;
             }
             break;
           default:
             if ((doc_matters.opt.action.debug_do)) {
-              writeln(__FILE__, ":", __LINE__, ": ", obj.is_of);
+              writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.is_of);
             }
             break;
           }
@@ -2424,53 +2424,53 @@ void outputEPub3(D,I)(
           break;
         default:
           if ((doc_matters.opt.action.debug_do)) {
-            writeln(__FILE__, ":", __LINE__, ": ", obj.of_part);
+            writeln(__FILE__, ":", __LINE__, ": ", obj.typeinfo.of_part);
           }
           break;
         }
       }
-      if (obj.is_a == "heading") {
+      if (obj.typeinfo.is_a == "heading") {
         assert(obj.text.length > 0);
-        if (obj.heading_lev_markup <= 4) {
+        if (obj.node.heading_lev_markup <= 4) {
           oepbs_content_parts["manifest_documents"] ~=
             format(q"¶      <item id="%s.xhtml" href="%s.xhtml" media-type="application/xhtml+xml" />
 ¶",
-            obj.segment_anchor_tag,
-            obj.segment_anchor_tag,
+            obj.tags.segment_anchor_tag,
+            obj.tags.segment_anchor_tag,
           );
           oepbs_content_parts["spine"] ~=
             format(q"¶    <itemref idref="%s.xhtml" linear="yes" />
 ¶",
-            obj.segment_anchor_tag,
+            obj.tags.segment_anchor_tag,
           );
           oepbs_content_parts["guide"] ~=
             format(q"¶      <reference type="%s" href="%s" />
 ¶",
-            obj.segment_anchor_tag,
-            obj.segment_anchor_tag,
+            obj.tags.segment_anchor_tag,
+            obj.tags.segment_anchor_tag,
           );
-        } else if (obj.heading_lev_markup > 4) {
+        } else if (obj.node.heading_lev_markup > 4) {
           oepbs_content_parts["manifest_documents"] ~=
             format(q"¶      <item id="%s.xhtml#%s" href="%s.xhtml#%s" media-type="application/xhtml+xml" />
 ¶",
-            obj.segment_anchor_tag,
-            obj.obj_cite_number,
-            obj.segment_anchor_tag,
-            obj.obj_cite_number,
+            obj.tags.segment_anchor_tag,
+            obj.node.obj_cite_number,
+            obj.tags.segment_anchor_tag,
+            obj.node.obj_cite_number,
           );
           oepbs_content_parts["spine"] ~=
             format(q"¶    <itemref idref="%s.xhtml#%s" linear="yes" />
 ¶",
-            obj.segment_anchor_tag,
-            obj.obj_cite_number,
+            obj.tags.segment_anchor_tag,
+            obj.node.obj_cite_number,
           );
           oepbs_content_parts["guide"] ~=
             format(q"¶      <reference type="%s#%s" href="%s#%s" />
 ¶",
-            obj.segment_anchor_tag,
-            obj.obj_cite_number,
-            obj.segment_anchor_tag,
-            obj.obj_cite_number,
+            obj.tags.segment_anchor_tag,
+            obj.node.obj_cite_number,
+            obj.tags.segment_anchor_tag,
+            obj.node.obj_cite_number,
           );
         }
       }