13 files changed, 238 insertions, 103 deletions
diff --git a/src/doc_reform/io_out/epub3.d b/src/doc_reform/io_out/epub3.d
index d19545c..41d6d9d 100644
--- a/src/doc_reform/io_out/epub3.d
+++ b/src/doc_reform/io_out/epub3.d
@@ -58,18 +58,21 @@ template outputEPub3() {
     std.conv : to;
   import
     doc_reform.io_out,
+    doc_reform.io_out.rgx,
+    doc_reform.io_out.rgx_xhtml,
     doc_reform.io_out.create_zip_file,
     doc_reform.io_out.xmls,
     doc_reform.io_out.xmls_css;
   mixin InternalMarkup;
   mixin outputXHTMLs;
   static auto rgx = RgxO();
+  static auto rgx_xhtml = RgxXHTML();
   @safe string special_characters_text(string _txt) {
     _txt = _txt
-      .replaceAll(rgx.xhtml_ampersand,    "&amp;")  // "&#38;"
-      .replaceAll(rgx.xhtml_quotation,    "&quot;") // "&#34;"
-      .replaceAll(rgx.xhtml_less_than,    "&lt;")   // "&#60;"
-      .replaceAll(rgx.xhtml_greater_than, "&gt;")   // "&#62;"
+      .replaceAll(rgx_xhtml.ampersand,    "&amp;")  // "&#38;"
+      .replaceAll(rgx_xhtml.quotation,    "&quot;") // "&#34;"
+      .replaceAll(rgx_xhtml.less_than,    "&lt;")   // "&#60;"
+      .replaceAll(rgx_xhtml.greater_than, "&gt;")   // "&#62;"
       .replaceAll(rgx.br_line,            "<br />")
       .replaceAll(rgx.br_line_inline,     "<br />")
       .replaceAll(rgx.br_line_spaced,     "<br />\n<br />")
@@ -184,6 +187,7 @@ template outputEPub3() {
     enum DomTags { none, open, close, close_and_open, open_still, }
     auto markup = InlineMarkup();
     static auto rgx = RgxO();
+    static auto rgx_xhtml = RgxXHTML();
     string toc;
     bool _new_title_set = false;
     string toc_head = format(q"┃<html xmlns="https://www.w3.org/1999/xhtml"
@@ -297,8 +301,10 @@ template outputEPub3() {
           I    doc_matters,
   ) {
     mixin spineRgxOut;
+    mixin spineRgxXHTML;
     auto xhtml_format = outputXHTMLs();
     static auto rgx = RgxO();
+    static auto rgx_xhtml = RgxXHTML();
     string[] doc;
     string segment_filename;
     string[] top_level_headings = ["","","",""];
@@ -607,6 +613,7 @@ template outputEPub3() {
       static assert(is(typeof(epub_write.oebps_content_opf)      == string));
     }
     static auto rgx = RgxO();
+    static auto rgx_xhtml = RgxXHTML();
     auto pth_epub3 = spinePathsEPUB!()(doc_matters.output_path, doc_matters.src.language);
     auto xhtml_format = outputXHTMLs();
     /+ zip file +/
diff --git a/src/doc_reform/io_out/html.d b/src/doc_reform/io_out/html.d
index 26636ba..dd50252 100644
--- a/src/doc_reform/io_out/html.d
+++ b/src/doc_reform/io_out/html.d
@@ -57,6 +57,9 @@ template outputHTML() {
     std.conv : to;
   import
     doc_reform.io_out,
+    doc_reform.io_out.rgx,
+    doc_reform.meta.rgx_files,
+    doc_reform.io_out.rgx_xhtml,
     doc_reform.io_out.create_zip_file,
     doc_reform.io_out.xmls,
     doc_reform.io_out.xmls_css;
@@ -66,8 +69,10 @@ template outputHTML() {
                  M    doc_matters,
   ) {
     mixin spineRgxOut;
+    mixin spineRgxXHTML;
     auto xhtml_format = outputXHTMLs();
     static auto rgx = RgxO();
+    static auto rgx_xhtml = RgxXHTML();
     string[] doc_html;
     string[] doc;
     string suffix = ".html";
@@ -257,7 +262,9 @@ template outputHTML() {
           M    doc_matters,
   ) {
     mixin spineRgxOut;
+    mixin spineRgxXHTML;
     static auto rgx = RgxO();
+    static auto rgx_xhtml = RgxXHTML();
     auto xhtml_format = outputXHTMLs();
     string[][string] doc_html;
     string[][string] doc_html_endnotes;
@@ -508,11 +515,11 @@ template outputHTML() {
     debug(asserts) {
       static assert(is(typeof(doc_html)      == string[][string]));
     }
-    mixin spineRgxOut;
-    static auto rgx = RgxO();
+    mixin spineRgxFiles;
+    static auto rgx_files = RgxFiles();
     auto pth_html = spinePathsHTML!()(doc_matters.output_path, doc_matters.src.language);
     auto xhtml_format = outputXHTMLs();
-    auto m = doc_matters.src.filename.matchFirst(rgx.src_fn);
+    auto m = doc_matters.src.filename.matchFirst(rgx_files.src_fn);
     try {
       if (!exists(pth_html.seg(doc_matters.src.filename))) {
         pth_html.seg(doc_matters.src.filename).mkdirRecurse;
diff --git a/src/doc_reform/io_out/hub.d b/src/doc_reform/io_out/hub.d
index 4c5254b..c53055d 100644
--- a/src/doc_reform/io_out/hub.d
+++ b/src/doc_reform/io_out/hub.d
@@ -63,10 +63,8 @@ template outputHub() {
     const D doc_abstraction,
     I doc_matters
   ) {
-    mixin spineRgxOut;
     mixin Msg;
     auto msg = Msg!()(doc_matters);
-    static auto rgx = RgxO();
     enum outTask { source_or_pod, sqlite, sqlite_multi, latex, odt, epub, html_scroll, html_seg, html_stuff }
     void Scheduled(D,I)(int sched, D doc_abstraction, I doc_matters) {
       auto msg = Msg!()(doc_matters);
@@ -201,8 +199,6 @@ template outputHubOp() {
     doc_reform.io_out.create_zip_file,
     doc_reform.io_out.paths_output;
   @system void outputHubOp(E,O,C)(E env, O opt_action, C config) {
-    mixin spineRgxOut;
-    static auto rgx = RgxO();
     if ((opt_action.sqlite_db_drop)) {
       if ((opt_action.vox_gt1)) {
         writeln("sqlite drop db...");
diff --git a/src/doc_reform/io_out/latex.d b/src/doc_reform/io_out/latex.d
index 992887d..f7dee74 100644
--- a/src/doc_reform/io_out/latex.d
+++ b/src/doc_reform/io_out/latex.d
@@ -325,10 +325,14 @@ template outputLaTeX() {
     std.outbuffer,
     std.uri,
     std.conv : to;
-  import doc_reform.io_out;
-  mixin InternalMarkup; // watch
+  import
+    doc_reform.io_out,
+    doc_reform.io_out.rgx,
+    doc_reform.io_out.rgx_latex;
   mixin spineRgxOut;
   static auto rgx = RgxO();
+  mixin spineRgxLSC;
+  static auto rgx_sc = RgxLSC();
   mixin spineLanguageCodes;
   auto lang = Lang();
   auto paper = paperLaTeX;
@@ -337,23 +341,23 @@ template outputLaTeX() {
   ) {
     string _unescape_sp_char_esc()(string _txt) {
       _txt = _txt
-        .replaceAll(rgx.latex_special_char_escaped,
+        .replaceAll(rgx_sc.latex_special_char_escaped,
           format(q"┃%s┃", "$1"))
-        .replaceAll(rgx.latex_special_char_escaped_braced,
+        .replaceAll(rgx_sc.latex_special_char_escaped_braced,
           format(q"┃%s┃", "$1"));
       return _txt;
     }
     string _unescape_fontface_esc()(string _txt) {
-      _txt = _txt.replaceAll(rgx.latex_identify_inline_fontface,
+      _txt = _txt.replaceAll(rgx_sc.latex_identify_inline_fontface,
            format(q"┃%s%s┃", "$1", "$2"));
       return _txt;
     }
-    _txt = replaceAll!(m => "\\" ~ m[1])(_txt, rgx.latex_special_char_for_escape);
-    _txt = replaceAll!(m => "{\\" ~ m[1] ~ "}")(_txt, rgx.latex_special_char_for_escape_and_braces);
+    _txt = replaceAll!(m => "\\" ~ m[1])(_txt, rgx_sc.latex_special_char_for_escape);
+    _txt = replaceAll!(m => "{\\" ~ m[1] ~ "}")(_txt, rgx_sc.latex_special_char_for_escape_and_braces);
     _txt = replaceAll!(m => "''")(_txt, rgx.quotes_open_and_close);
     _txt = replaceAll!(m => "$\\cdot$")(_txt, rgx.middle_dot);
-    _txt = replaceAll!(m => _unescape_sp_char_esc(m[0]))(_txt, rgx.latex_identify_inline_link);
-    _txt = replaceAll!(m => _unescape_fontface_esc(m[0]))(_txt, rgx.latex_identify_inline_fontface);
+    _txt = replaceAll!(m => _unescape_sp_char_esc(m[0]))(_txt, rgx_sc.latex_identify_inline_link);
+    _txt = replaceAll!(m => _unescape_fontface_esc(m[0]))(_txt, rgx_sc.latex_identify_inline_fontface);
     return _txt;
   }
   @safe string sp_char_esc(O)(
@@ -461,8 +465,8 @@ template outputLaTeX() {
       }
       string _check_link(string _link) {
         _link = _link
-          .replaceFirst(rgx.latex_clean_internal_link, "")
-          .replaceAll(rgx.latex_special_char_for_escape_url, "\\$1");
+          .replaceFirst(rgx_sc.latex_clean_internal_link, "")
+          .replaceAll(rgx_sc.latex_special_char_for_escape_url, "\\$1");
         return _link;
       }
       if  (obj.metainfo.is_a != "code") {
@@ -529,7 +533,7 @@ template outputLaTeX() {
       string _tex_para;
       _tex_para = q"┃%s┃";
       _txt  = format(_tex_para,
-        _txt.replaceAll(rgx.latex_clean_bookindex_linebreak, "\n") ~ "\n\\brln\n"
+        _txt.replaceAll(rgx_sc.latex_clean_bookindex_linebreak, "\n") ~ "\n\\brln\n"
       );
     }
     return _txt;
@@ -1381,7 +1385,6 @@ template outputLaTeX() {
 }
 template outputLaTeXstyInit() {
   import doc_reform.io_out;
-  mixin spineRgxOut;
   auto paper = paperLaTeX;
   void writeOutputLaTeXstyStatic(
     string latex_sty,
diff --git a/src/doc_reform/io_out/odt.d b/src/doc_reform/io_out/odt.d
index c5fb469..1cde2d4 100644
--- a/src/doc_reform/io_out/odt.d
+++ b/src/doc_reform/io_out/odt.d
@@ -50,7 +50,10 @@
 +/
 module doc_reform.io_out.odt;
 template formatODT() {
-  import doc_reform.io_out;
+  import
+    doc_reform.io_out,
+    doc_reform.io_out.rgx,
+    doc_reform.io_out.rgx_xhtml;
   import
     std.digest.sha,
     std.file,
@@ -63,8 +66,10 @@ template formatODT() {
     doc_reform.io_out.xmls,
     doc_reform.io_out.xmls_css;
   mixin spineRgxOut;
+  mixin spineRgxXHTML;
   struct formatODT {
     static auto rgx = RgxO();
+    static auto rgx_xhtml = RgxXHTML();
     @safe string _tags(O)(const O obj) {
       string _tags = "";
       if (obj.tags.anchor_tags.length > 0) {
@@ -107,6 +112,7 @@ template formatODT() {
     }
     @safe string _footnotes()(string _txt) {
       static auto rgx = RgxO();
+      static auto rgx_xhtml = RgxXHTML();
       _txt = _txt.replaceAll(
         rgx.inline_notes_al_regular_number_note,
         format(q"┃<text:note text:id="ftn%s" text:note-class="footnote">
@@ -274,10 +280,10 @@ template formatODT() {
     }
     @safe string _special_characters(O)(string _txt, const O obj) {
       _txt = _txt
-        .replaceAll(rgx.xhtml_ampersand,    "&amp;")
-        .replaceAll(rgx.xhtml_quotation,    "&#34;")
-        .replaceAll(rgx.xhtml_less_than,    "&lt;")
-        .replaceAll(rgx.xhtml_greater_than, "&gt;")
+        .replaceAll(rgx_xhtml.ampersand,    "&amp;")
+        .replaceAll(rgx_xhtml.quotation,    "&#34;")
+        .replaceAll(rgx_xhtml.less_than,    "&lt;")
+        .replaceAll(rgx_xhtml.greater_than, "&gt;")
         .replaceAll(rgx.nbsp_char,          "&#160;");
       return _txt;
     }
@@ -640,7 +646,10 @@ template formatODT() {
   }
 }
 template outputODT() {
-  import doc_reform.io_out;
+  import
+    doc_reform.io_out,
+    doc_reform.io_out.rgx,
+    doc_reform.io_out.rgx_xhtml;
   import
     std.digest.sha,
     std.file,
@@ -654,7 +663,9 @@ template outputODT() {
     doc_reform.io_out.xmls_css;
   mixin InternalMarkup;
   mixin spineRgxOut;
+  mixin spineRgxXHTML;
   static auto rgx = RgxO();
+  static auto rgx_xhtml = RgxXHTML();
   // mixin outputXmlODT;
   @safe string odt_head(I)(I doc_matters) {
     string _has_tables = format(q"┃
diff --git a/src/doc_reform/io_out/package.d b/src/doc_reform/io_out/package.d
index b6932ea..0a75f98 100644
--- a/src/doc_reform/io_out/package.d
+++ b/src/doc_reform/io_out/package.d
@@ -67,5 +67,4 @@ public import
   doc_reform.share.defaults,
   doc_reform.io_in.paths_source,
   doc_reform.io_out.defaults,
-  doc_reform.io_out.paths_output,
-  doc_reform.io_out.rgx;
+  doc_reform.io_out.paths_output;
diff --git a/src/doc_reform/io_out/paths_output.d b/src/doc_reform/io_out/paths_output.d
index fc31711..471c966 100644
--- a/src/doc_reform/io_out/paths_output.d
+++ b/src/doc_reform/io_out/paths_output.d
@@ -57,7 +57,8 @@ import
   std.path,
   std.regex,
   std.stdio;
-import doc_reform.meta.rgx;
+import
+  doc_reform.meta.rgx_files;
 template spineOutPaths() {
   auto spineOutPaths()(
     string output_pth_root,
@@ -149,8 +150,6 @@ template spineOutPathsFnPd() {
 }
 
 template spineDocRootTreeHTML() {
-  mixin spineRgxIn;
-  static auto rgx = RgxI();
   auto spineDocRootTreeHTML()(string lng) {
     auto lng_pth = spineOutPaths!()("", lng);
     string base_dir = "html";
@@ -209,8 +208,6 @@ template spineDocRootTreeHTML() {
   }
 }
 template spinePathsHTML() {
-  mixin spineRgxIn;
-  static auto rgx = RgxI();
   auto spinePathsHTML()(
     string output_path_root,
     string lng,
@@ -270,8 +267,6 @@ template spinePathsHTML() {
 }
 template spineUrlsHTML() {
   import std.format;
-  mixin spineRgxIn;
-  static auto rgx = RgxI();
   auto spineUrlsHTML()(
     string url_doc_root,
     string lng,
@@ -371,8 +366,6 @@ template spineUrlsHTML() {
   }
 }
 template spinePathsEPUB() {
-  mixin spineRgxIn;
-  static auto rgx = RgxI();
   auto spinePathsEPUB()(
     string output_pth_root,
     string lng,
@@ -477,8 +470,6 @@ template spinePathsEPUB() {
 }
 template spinePathsODT() {
   import std.conv;
-  mixin spineRgxIn;
-  static auto rgx = RgxI();
   auto spinePathsODT(M)(
     M  doc_matters,
   ) {
@@ -541,8 +532,6 @@ template spinePathsODT() {
   }
 }
 template spinePathsPDF() {
-  mixin spineRgxIn;
-  static auto rgx = RgxI();
   auto spinePathsPDF(M)(
     M  doc_matters,
   ) {
@@ -565,8 +554,6 @@ template spinePathsPDF() {
   }
 }
 template spinePathsLaTeX() {
-  mixin spineRgxIn;
-  static auto rgx = RgxI();
   auto spinePathsLaTeX(M)(
     M  doc_matters,
   ) {
@@ -636,8 +623,6 @@ template spinePathsLaTeXsty() {
   }
 }
 template spinePathsSQLiteDiscrete() {
-  mixin spineRgxIn;
-  static auto rgx = RgxI();
   auto spinePathsSQLiteDiscrete()(
     string output_pth_root,
     string lng,
@@ -662,8 +647,6 @@ template spinePathsSQLiteDiscrete() {
   }
 }
 template spinePathsSQLite() {
-  mixin spineRgxIn;
-  static auto rgx = RgxI();
   auto spinePathsSQLite()(
     string db_name,
     string output_pth_root,
diff --git a/src/doc_reform/io_out/rgx.d b/src/doc_reform/io_out/rgx.d
index 8369735..943643c 100644
--- a/src/doc_reform/io_out/rgx.d
+++ b/src/doc_reform/io_out/rgx.d
@@ -68,8 +68,7 @@ static template spineRgxOut() {
     static src_pth_contents                         = ctRegex!(`^(?P<path>[/]?(?:[a-zA-Z0-9._-]+/)*)(?P<filename>[a-zA-Z0-9][a-zA-Z0-9._-]*)/pod[.]manifest$`);
     static src_pth_zip                              = ctRegex!(`^(?P<path>[/]?(?:[a-zA-Z0-9._-]+/)*)(?P<filename>[a-zA-Z0-9._-]+[.]zip)$`);
     static src_pth_types                            = ctRegex!(`^(?P<path>[/]?[a-zA-Z0-9._-]+/)*(?P<gotfile>(?P<filename>[a-zA-Z0-9._-]+[.]ss[tm])|(?P<filelist>[a-zA-Z0-9._-]+/pod[.]manifest)|(?P<filezip>[a-zA-Z0-9._-]+[.]zip))$`);
-    static src_fn                                   =
-      ctRegex!(`^([/]?(?:[a-zA-Z0-9._-]+/)*)(?P<fn_src>(?P<fn_base>[a-zA-Z0-9._-]+)[.](?P<fn_src_suffix>ss[tm]))$`);
+    static src_fn                                   = ctRegex!(`^([/]?(?:[a-zA-Z0-9._-]+/)*)(?P<fn_src>(?P<fn_base>[a-zA-Z0-9._-]+)[.](?P<fn_src_suffix>ss[tm]))$`);
     static src_fn_master                            = ctRegex!(`^(?P<path>/?(?:[a-zA-Z0-9._-]+/)*)(?P<filename>[a-zA-Z0-9._-]+[.]ssm)$`);
     static src_fn_find_inserts                      = ctRegex!(`^(?P<path>/?(?:[a-zA-Z0-9._-]+/)*)(?P<filename>[a-zA-Z0-9._-]+[.]ss[im])$`);
     static insert_src_fn_ssi_or_sst                 = ctRegex!(`^<<\s*(?P<path>[a-zA-Z0-9._-]+/)*(?P<filename>[a-zA-Z0-9._-]+[.]ss[ti])$`);
@@ -119,34 +118,19 @@ static template spineRgxOut() {
     static mark_internal_site_lnk                   = ctRegex!(`¤`, "mg");
     static quotation_mark_sql_insert_delimiter      = ctRegex!("[']", "mg");
     /+ inline markup font face mod +/
-    static inline_emphasis                          = ctRegex!(`[*]┨(?P<text>.+?)┣[*]`, "mg");
-    static inline_bold                              = ctRegex!(`[!]┨(?P<text>.+?)┣[!]`, "mg");
-    static inline_underscore                        = ctRegex!(`[_]┨(?P<text>.+?)┣[_]`, "mg");
-    static inline_italics                           = ctRegex!(`[/]┨(?P<text>.+?)┣[/]`, "mg");
-    static inline_superscript                       = ctRegex!(`\^┨(?P<text>.+?)┣\^`, "mg");
-    static inline_subscript                         = ctRegex!(`[,]┨(?P<text>.+?)┣[,]`, "mg");
-    static inline_strike                            = ctRegex!(`[-]┨(?P<text>.+?)┣[-]`, "mg");
-    static inline_insert                            = ctRegex!(`[+]┨(?P<text>.+?)┣[+]`, "mg");
-    static inline_mono                              = ctRegex!(`[■]┨(?P<text>.+?)┣[■]`, "mg");
-    static inline_cite                              = ctRegex!(`[‖]┨(?P<text>.+?)┣[‖]`, "mg");
+    static inline_emphasis                          = ctRegex!(`⑆[*]┨(?P<text>.+?)┣[*]`, "mg");
+    static inline_bold                              = ctRegex!(`⑆[!]┨(?P<text>.+?)┣[!]`, "mg");
+    static inline_underscore                        = ctRegex!(`⑆[_]┨(?P<text>.+?)┣[_]`, "mg");
+    static inline_italics                           = ctRegex!(`⑆[/]┨(?P<text>.+?)┣[/]`, "mg");
+    static inline_superscript                       = ctRegex!(`⑆\^┨(?P<text>.+?)┣\^`, "mg");
+    static inline_subscript                         = ctRegex!(`⑆[,]┨(?P<text>.+?)┣[,]`, "mg");
+    static inline_strike                            = ctRegex!(`⑆[-]┨(?P<text>.+?)┣[-]`, "mg");
+    static inline_insert                            = ctRegex!(`⑆[+]┨(?P<text>.+?)┣[+]`, "mg");
+    static inline_mono                              = ctRegex!(`⑆[■]┨(?P<text>.+?)┣[■]`, "mg");
+    static inline_cite                              = ctRegex!(`⑆[‖]┨(?P<text>.+?)┣[‖]`, "mg");
     /+ table delimiters +/
     static table_delimiter_col                      = ctRegex!("[ ]*[┊][ ]*", "mg");
     static table_delimiter_row                      = ctRegex!("[ ]*\n", "mg");
-    static xhtml_ampersand                          = ctRegex!(`[&]`, "m");      // &amp;
-    static xhtml_quotation                          = ctRegex!(`["]`, "m");      // &quot;
-    static xhtml_less_than                          = ctRegex!(`[<]`, "m");      // &lt;
-    static xhtml_greater_than                       = ctRegex!(`[>]`, "m");      // &gt;
-    static xhtml_line_break                         = ctRegex!(` [\\]{2}`, "m"); // <br />
-    static latex_special_char                       = ctRegex!(`([%${}_#&\\])`);
-    static latex_special_char_for_escape            = ctRegex!(`([%${}_#\\])`);
-    static latex_special_char_for_escape_and_braces = ctRegex!(`([&])`);
-    static latex_special_char_for_escape_url        = ctRegex!(`([%])`);
-    static latex_special_char_escaped               = ctRegex!(`\\([%${}_#\\])`);
-    static latex_special_char_escaped_braced        = ctRegex!(`[{]\\([&])[}]`);
-    static latex_identify_inline_link               = ctRegex!(`┥.+?┝┤\S+?├`, "mg");
-    static latex_identify_inline_fontface           = ctRegex!(`\\([_#$]┨.+?┣)\\([_#$])`, "mg");
-    static latex_clean_internal_link                = ctRegex!(`^(?:#|¤\S+?#)`, "m");
-    static latex_clean_bookindex_linebreak          = ctRegex!(`\s*\\\\\\\\\s*`, "m");
     /+ paragraph operators +/
     static grouped_para_indent_1                    = ctRegex!(`^_1[ ]`, "m");
     static grouped_para_indent_2                    = ctRegex!(`^_2[ ]`, "m");
diff --git a/src/doc_reform/io_out/rgx_latex.d b/src/doc_reform/io_out/rgx_latex.d
new file mode 100644
index 0000000..25b9c60
--- /dev/null
+++ b/src/doc_reform/io_out/rgx_latex.d
@@ -0,0 +1,68 @@
+/+
+- Name: Spine, Doc Reform [a part of]
+  - Description: documents, structuring, processing, publishing, search
+    - static content generator
+
+  - Author: Ralph Amissah
+    [ralph.amissah@gmail.com]
+
+  - Copyright: (C) 2015 - 2022 Ralph Amissah, All Rights
+    Reserved.
+
+  - License: AGPL 3 or later:
+
+    Spine (SiSU), a framework for document structuring, publishing and
+    search
+
+    Copyright (C) Ralph Amissah
+
+    This program is free software: you can redistribute it and/or modify it
+    under the terms of the GNU AFERO General Public License as published by the
+    Free Software Foundation, either version 3 of the License, or (at your
+    option) any later version.
+
+    This program is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+    more details.
+
+    You should have received a copy of the GNU General Public License along with
+    this program. If not, see [https://www.gnu.org/licenses/].
+
+    If you have Internet connection, the latest version of the AGPL should be
+    available at these locations:
+    [https://www.fsf.org/licensing/licenses/agpl.html]
+    [https://www.gnu.org/licenses/agpl.html]
+
+  - Spine (by Doc Reform, related to SiSU) uses standard:
+    - docReform markup syntax
+      - standard SiSU markup syntax with modified headers and minor modifications
+    - docReform object numbering
+      - standard SiSU object citation numbering & system
+
+  - Homepages:
+    [https://www.doc_reform.org]
+    [https://www.sisudoc.org]
+
+  - Git
+    [https://git.sisudoc.org/projects/?p=software/spine.git;a=summary]
+
++/
+/++
+  regex: regular expressions used in sisu document parser
++/
+module doc_reform.io_out.rgx_latex;
+static template spineRgxLSC() {
+  static struct RgxLSC {
+    static latex_special_char                       = ctRegex!(`([%${}_#&\\])`);
+    static latex_special_char_for_escape            = ctRegex!(`([%${}_#\\])`);
+    static latex_special_char_for_escape_and_braces = ctRegex!(`([&])`);
+    static latex_special_char_for_escape_url        = ctRegex!(`([%])`);
+    static latex_special_char_escaped               = ctRegex!(`\\([%${}_#\\])`);
+    static latex_special_char_escaped_braced        = ctRegex!(`[{]\\([&])[}]`);
+    static latex_identify_inline_link               = ctRegex!(`┥.+?┝┤\S+?├`, "mg");
+    static latex_identify_inline_fontface           = ctRegex!(`\\([_#$]┨.+?┣)\\([_#$])`, "mg");
+    static latex_clean_internal_link                = ctRegex!(`^(?:#|¤\S+?#)`, "m");
+    static latex_clean_bookindex_linebreak          = ctRegex!(`\s*\\\\\\\\\s*`, "m");
+  }
+}
diff --git a/src/doc_reform/io_out/rgx_xhtml.d b/src/doc_reform/io_out/rgx_xhtml.d
new file mode 100644
index 0000000..2d9aab1
--- /dev/null
+++ b/src/doc_reform/io_out/rgx_xhtml.d
@@ -0,0 +1,63 @@
+/+
+- Name: Spine, Doc Reform [a part of]
+  - Description: documents, structuring, processing, publishing, search
+    - static content generator
+
+  - Author: Ralph Amissah
+    [ralph.amissah@gmail.com]
+
+  - Copyright: (C) 2015 - 2022 Ralph Amissah, All Rights
+    Reserved.
+
+  - License: AGPL 3 or later:
+
+    Spine (SiSU), a framework for document structuring, publishing and
+    search
+
+    Copyright (C) Ralph Amissah
+
+    This program is free software: you can redistribute it and/or modify it
+    under the terms of the GNU AFERO General Public License as published by the
+    Free Software Foundation, either version 3 of the License, or (at your
+    option) any later version.
+
+    This program is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+    more details.
+
+    You should have received a copy of the GNU General Public License along with
+    this program. If not, see [https://www.gnu.org/licenses/].
+
+    If you have Internet connection, the latest version of the AGPL should be
+    available at these locations:
+    [https://www.fsf.org/licensing/licenses/agpl.html]
+    [https://www.gnu.org/licenses/agpl.html]
+
+  - Spine (by Doc Reform, related to SiSU) uses standard:
+    - docReform markup syntax
+      - standard SiSU markup syntax with modified headers and minor modifications
+    - docReform object numbering
+      - standard SiSU object citation numbering & system
+
+  - Homepages:
+    [https://www.doc_reform.org]
+    [https://www.sisudoc.org]
+
+  - Git
+    [https://git.sisudoc.org/projects/?p=software/spine.git;a=summary]
+
++/
+/++
+  regex: regular expressions used in sisu document parser
++/
+module doc_reform.io_out.rgx_xhtml;
+static template spineRgxXHTML() {
+  static struct RgxXHTML {
+    static ampersand                                = ctRegex!(`[&]`, "m");      // &amp;
+    static quotation                                = ctRegex!(`["]`, "m");      // &quot;
+    static less_than                                = ctRegex!(`[<]`, "m");      // &lt;
+    static greater_than                             = ctRegex!(`[>]`, "m");      // &gt;
+    static line_break                               = ctRegex!(` [\\]{2}`, "m"); // <br />
+  }
+}
diff --git a/src/doc_reform/io_out/source_pod.d b/src/doc_reform/io_out/source_pod.d
index 14d63d7..0f9aef7 100644
--- a/src/doc_reform/io_out/source_pod.d
+++ b/src/doc_reform/io_out/source_pod.d
@@ -50,7 +50,9 @@
 +/
 module doc_reform.io_out.source_pod;
 template spinePod() {
-  import doc_reform.io_out;
+  import
+    doc_reform.meta.rgx_files,
+    doc_reform.io_out;
   import
     std.digest.sha,
     std.file,
@@ -64,15 +66,15 @@ template spinePod() {
     debug(asserts) {
       // static assert(is(typeof(doc_matters) == tuple));
     }
-    mixin spineRgxOut;
+    mixin spineRgxFiles;
     string pwd = doc_matters.env.pwd;
     auto src_path_info = doc_matters.src_path_info;
     auto pth_dr_doc_src = doc_matters.src_path_info;
     auto pths_pod = spinePathsPods!()(doc_matters);
     mixin spineLanguageCodes;
     auto lang = Lang();
-    static auto rgx = RgxO();
-    assert (doc_matters.src.filename.match(rgx.src_fn));
+    static auto rgx_files = RgxFiles();
+    assert (doc_matters.src.filename.match(rgx_files.src_fn));
     @system auto pod_archive(Z)(
       string _source_type,
       string _data_in,
diff --git a/src/doc_reform/io_out/sqlite.d b/src/doc_reform/io_out/sqlite.d
index a546998..33c25fe 100644
--- a/src/doc_reform/io_out/sqlite.d
+++ b/src/doc_reform/io_out/sqlite.d
@@ -49,7 +49,10 @@
 
 +/
 module doc_reform.io_out.sqlite;
-import doc_reform.io_out;
+import
+  doc_reform.io_out,
+  doc_reform.io_out.rgx,
+  doc_reform.io_out.rgx_xhtml;
 import
   std.file,
   std.uri;
@@ -57,8 +60,10 @@ import std.conv : to;
 import std.typecons : Nullable;
 import d2sqlite3;
 mixin spineRgxOut;
+mixin spineRgxXHTML;
 mixin InternalMarkup;
 static auto rgx = RgxO();
+static auto rgx_xhtml = RgxXHTML();
 static auto mkup = InlineMarkup();
 long _metadata_tid_lastrowid;
 template SQLiteHubBuildTablesAndPopulate() {
@@ -193,6 +198,7 @@ template SQLiteFormatAndLoadObject() {
     M    doc_matters,
   ) {
     mixin spineRgxOut;
+    mixin spineRgxXHTML;
     struct sqlite_format_and_load_objects {
       string generic_munge_sanitize_text_for_search(
         string _txt,
@@ -235,15 +241,15 @@ template SQLiteFormatAndLoadObject() {
       ) {
         string _html_special_characters(string _txt){
           _txt = _txt
-            .replaceAll(rgx.xhtml_ampersand,    "&#38;")
-            .replaceAll(rgx.xhtml_quotation,    "&#34;")
-            .replaceAll(rgx.xhtml_less_than,    "&#60;")
-            .replaceAll(rgx.xhtml_greater_than, "&#62;")
+            .replaceAll(rgx_xhtml.ampersand,    "&#38;")
+            .replaceAll(rgx_xhtml.quotation,    "&#34;")
+            .replaceAll(rgx_xhtml.less_than,    "&#60;")
+            .replaceAll(rgx_xhtml.greater_than, "&#62;")
             .replaceAll(rgx.nbsp_char,          " ")
             .replaceAll(rgx.br_line_inline,     "<br />")
             .replaceAll(rgx.br_line,            "<br />")
             .replaceAll(rgx.br_line_spaced,     "<br /><br />")
-            .replaceAll(rgx.xhtml_line_break,   "<br />");
+            .replaceAll(rgx_xhtml.line_break,   "<br />");
           return _txt;
         }
         string _html_font_face(string _txt){
@@ -272,23 +278,23 @@ template SQLiteFormatAndLoadObject() {
       }
       string html_special_characters(string _txt){
         _txt = _txt
-          .replaceAll(rgx.xhtml_ampersand,    "&#38;")
-          .replaceAll(rgx.xhtml_quotation,    "&#34;")
-          .replaceAll(rgx.xhtml_less_than,    "&#60;")
-          .replaceAll(rgx.xhtml_greater_than, "&#62;")
+          .replaceAll(rgx_xhtml.ampersand,    "&#38;")
+          .replaceAll(rgx_xhtml.quotation,    "&#34;")
+          .replaceAll(rgx_xhtml.less_than,    "&#60;")
+          .replaceAll(rgx_xhtml.greater_than, "&#62;")
           .replaceAll(rgx.nbsp_char,          " ")
           .replaceAll(rgx.br_line_inline,     "<br />")
           .replaceAll(rgx.br_line,            "<br />")
           .replaceAll(rgx.br_line_spaced,     "<br /><br />")
-          .replaceAll(rgx.xhtml_line_break,   "<br />");
+          .replaceAll(rgx_xhtml.line_break,   "<br />");
         return _txt;
       }
       string html_special_characters_code(string _txt){
         _txt = _txt
-          .replaceAll(rgx.xhtml_ampersand,    "&#38;")
-          .replaceAll(rgx.xhtml_quotation,    "&#34;")
-          .replaceAll(rgx.xhtml_less_than,    "&#60;")
-          .replaceAll(rgx.xhtml_greater_than, "&#62;")
+          .replaceAll(rgx_xhtml.ampersand,    "&#38;")
+          .replaceAll(rgx_xhtml.quotation,    "&#34;")
+          .replaceAll(rgx_xhtml.less_than,    "&#60;")
+          .replaceAll(rgx_xhtml.greater_than, "&#62;")
           .replaceAll(rgx.nbsp_char,          " ");
         return _txt;
       }
@@ -314,6 +320,7 @@ template SQLiteFormatAndLoadObject() {
         string          _xml_type = "seg",
       ) {
         static auto rgx = RgxO();
+        static auto rgx_xhtml = RgxXHTML();
         if (obj.metainfo.is_a == "group") {
           _txt = (_txt)
             .replaceAll(rgx.grouped_para_indent_1,
@@ -1614,7 +1621,7 @@ template SQLiteTablesCreate() {
         : "";
       if (db_filename.length > 0 && db_path.length > 0) {
         if ((opt_action.vox_gt1)) {
-          writeln("db name & path: ", db_path, db_filename);
+          writeln("db name & path: ", db_path, "/", db_filename);
         }
         auto pth_sqlite = spinePathsSQLite!()(db_filename, db_path);
         pth_sqlite.base.mkdirRecurse;
diff --git a/src/doc_reform/io_out/xmls.d b/src/doc_reform/io_out/xmls.d
index 0b0dce7..131dbb6 100644
--- a/src/doc_reform/io_out/xmls.d
+++ b/src/doc_reform/io_out/xmls.d
@@ -57,12 +57,17 @@ template outputXHTMLs() {
     std.conv : to;
   import
     doc_reform.io_out,
+    doc_reform.io_out.rgx,
+    doc_reform.meta.rgx_files,
+    doc_reform.io_out.rgx_xhtml,
     doc_reform.io_out.create_zip_file,
     doc_reform.io_out.xmls,
     doc_reform.io_out.xmls_css;
   mixin spineRgxOut;
+  mixin spineRgxXHTML;
   struct outputXHTMLs {
     static auto rgx = RgxO();
+    static auto rgx_xhtml = RgxXHTML();
     @safe string div_delimit(
                  string  part,
       return ref string  previous_part
@@ -95,10 +100,10 @@ template outputXHTMLs() {
     }
     @safe string special_characters_text(string _txt) {
       _txt = _txt
-        .replaceAll(rgx.xhtml_ampersand,    "&amp;")  // "&#38;"
-        .replaceAll(rgx.xhtml_quotation,    "&quot;") // "&#34;"
-        .replaceAll(rgx.xhtml_less_than,    "&lt;")   // "&#60;"
-        .replaceAll(rgx.xhtml_greater_than, "&gt;")   // "&#62;"
+        .replaceAll(rgx_xhtml.ampersand,    "&amp;")  // "&#38;"
+        .replaceAll(rgx_xhtml.quotation,    "&quot;") // "&#34;"
+        .replaceAll(rgx_xhtml.less_than,    "&lt;")   // "&#60;"
+        .replaceAll(rgx_xhtml.greater_than, "&gt;")   // "&#62;"
         .replaceAll(rgx.br_line,            "<br />")
         .replaceAll(rgx.br_line_inline,     "<br />")
         .replaceAll(rgx.br_line_spaced,     "<br />\n<br />")
@@ -161,7 +166,7 @@ template outputXHTMLs() {
       }
       if (!(obj.metainfo.is_a == "code")) {
         _txt = (_txt)
-          .replaceAll(rgx.xhtml_line_break,   "<br />");
+          .replaceAll(rgx_xhtml.line_break,   "<br />");
       }
       return _txt;
     }