homepage updates, re-read

6 files changed, 850 insertions, 28 deletions

diff --git a/.gitignore b/.gitignore
index b23a5b0..0751d71 100644
--- a/.gitignore
+++ b/.gitignore
@@ -57,8 +57,8 @@
 !markup/pod/*/tools/po4a/po/*/*.sst.po
 !markup/pod/*/tools/po4a/po/*/*.ssm.po
 !markup/pod/*/tools/po4a/po/*/*.ssi.po
-!spine-bespoke-output
-!spine-bespoke-output/**
+!markup/spine-bespoke-output/
+!markup/spine-bespoke-output/**
 .dub/**
 **/.dub/**
 tmp/**
diff --git a/flake.lock b/flake.lock
index 2170922..d580353 100644
--- a/flake.lock
+++ b/flake.lock
@@ -74,11 +74,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1687701825,
-        "narHash": "sha256-aMC9hqsf+4tJL7aJWSdEUurW2TsjxtDcJBwM9Y4FIYM=",
+        "lastModified": 1688465017,
+        "narHash": "sha256-xzFcCnzPOgQaX7Acprfqo+tqHJ2UKWC38pXrcqvdXHU=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "07059ee2fa34f1598758839b9af87eae7f7ae6ea",
+        "rev": "0d5682acc109add20f70440269587a1b169cc2fe",
         "type": "github"
       },
       "original": {
@@ -104,11 +104,8 @@
         ]
       },
       "locked": {
-        "lastModified": 1687825841,
-        "narHash": "sha256-xkoFpg6/xTV6/oCtAICCYs6ve7aLkDvOKIiatO+EXVM=",
-        "ref": "refs/heads/main",
-        "rev": "7a652e5b73fe5af8a01d14fd282fa2e23781a0a8",
-        "revCount": 591,
+        "lastModified": 1687983830,
+        "narHash": "sha256-uhZwX8E3ZxtT95POA25Hj21hSYUXik1fXSEffOa2+Ts=",
         "type": "git",
         "url": "file:///home/ralph/grotto/repo/git.repo/projects/doc-reform/code/software/spine"
       },
diff --git a/markup/.gitignore b/markup/.gitignore
index c42c00f..ef74b64 100644
--- a/markup/.gitignore
+++ b/markup/.gitignore
@@ -60,6 +60,8 @@
 !pod/*/media/text/po/*/*.ssm.po
 !pod/*/media/text/po/*/*.ssi.po
 !pod/*/media/text/po/*/index.html.in.po
+!spine-bespoke-output/
+!spine-bespoke-output/**
 # skip
 .dub/**
 tmp/**
diff --git a/spine-bespoke-output/html/homepage.index.html b/markup/spine-bespoke-output/html/homepage.index.html
index abf0a68..017a083 100644
--- a/spine-bespoke-output/html/homepage.index.html
+++ b/markup/spine-bespoke-output/html/homepage.index.html
@@ -14,24 +14,14 @@ formats &amp; search</h1>
 <h2>ℹ - A short description</h2>
 
 <p>
+
 SiSU is an object-centric, lightweight markup based, document structuring,
 parser, publishing and search tool for document collections. It is command line
-oriented and generates static content that is also made searchable at an object
-level through an SQL database.
-</p>
-
-<p>
-
-SiSU markup helps define (delineate) text objects which are numbered
-sequentially by the program for object citation. Breaking the document into
-objects provides interesting possibilities. These object numbers provide the
-possibility of citing/locating text precisely across different document formats
-and different languages (assuming the document has been translated). For search
-it also makes it possible to identify precisely where within in each document
-search criteria is met in the form of an index. Additionally the use of objects
-(and that objects are numbered) frees the possibility to represent the document
-in the manner considered most suitable to a specific document format (whilst
-retaining its structural (and citation) integrity).
+oriented and generates static content that is currently made searchable at an
+object level through an SQL database.
+Markup helps define (delineate) objects (primarily various types of text block)
+which are tracked in sequence, substantive objects being numbered sequentially
+by the program for object citation.
 
 </p>
 
@@ -123,6 +113,148 @@ Debian live-manual
 <h2>ℹ - SiSU description</h2>
 
 <p>
+
+SiSU is an object-centric, lightweight markup based, document structuring,
+parser, publishing and search tool for document collections. It is command line
+oriented and generates static content that is currently made searchable at an
+object level through an SQL database.
+Markup helps define (delineate) objects (primarily various types of text block)
+which are tracked in sequence, substantive objects being numbered sequentially
+by the program for object citation.
+
+</p>
+<p>
+
+<b>Summary.</b> An object is a unit of text within a document the most common
+being a paragraph. Objects include individual headings, paragraphs, tables,
+grouped text of various types such as code blocks and within poems, verse.
+Objects have properties and attributes, of particular significance are headings
+and their levels which provide document structure. A heading is an object with a
+heirarchical value, that conceptually contains other objects (such as paragraphs
+and possibly sub-headings etc.). Objects are tracked sequentially as they relate
+to each other object within a document and substantive objects are numbered
+sequentially, for citation purposes. Notably footnotes are not objects in
+themselves, rather belonging to the object from which they are referenced, and
+following their own numbering sequence. From heading objects (linked) tables of
+content may be generated, and if additional metadata is provided book type
+indexes can be generated that link back to the objects to which they relate.
+
+</p>
+<p>
+
+<b>Unpacking this a bit further.</b> SiSU as a concept independent of its markup
+language and the parsers that have been implemented, is based on the following
+ideas:
+
+</p>
+<p>
+
+<b>Object-Centricity. On objects:</b> In SiSU objects are the fundamental unit
+from which larger constructs within a document and document itself is built.
+Breaking the document into objects provides interesting possibilities.
+
+</p>
+<p>
+
+<b>Objects are fundamental building blocks:</b> Conceptually within SiSU,
+objects are the building blocks or individual units of construction of a
+document. Objects are usually blocks of text, the most common of which is the
+paragraph, other examples include: individual headings, tables, grouped text of
+various types which include code blocks and verse within poems, ... and as
+mentioned an object could also, for example, be an image. Objects can be
+formatted and placed as needed, providing flexibility and enabling multiple
+types of representation across disperate formats and text recepticle, examples
+including html, epub, latex (in the past mind-maps) and sql (populated at an
+object level, and thereby providing search with that degree of granularity).
+
+</p>
+<p>
+
+<b>Sequential. Objects have sequence:</b> That objects have sequence, goes
+largely without saying, this follows authorship, it is part of the definition of
+a document and how a document is written to convey meaning.
+
+</p>
+<p>
+
+<b>Object Numbers & Citation. Substantive objects are numbered for citation
+purposes:</b> Most objects within a document are meant by the author to be a
+substantive part of the document. All such objects are numbered sequentially and
+can be referenced thereby for citation purposes.
+Object numbers provide the possibility of citing/locating text precisely across
+different document formats and different languages (assuming the document has
+been translated). For search it also makes it possible to identify precisely
+where search criteria is met within in each document in the form of an index or
+to view those precise text objects before deciding which documents are of
+interest. Additionally the use of objects (and that objects are numbered) frees
+the possibility to represent the document in the manner considered most suitable
+to a specific document format wilst retaining its structural (and citation)
+integrity).
+
+</p>
+<p>
+<b>Characteristics. Objects have properties and attributes:</b> Objects have
+properties (and may have attributes). By properties I here refer to the
+fundamental type of object, be it a heading, a paragraph, table, verse etc.
+Attributes extend further and may include other things that one might wish to
+associate with the object (examples not necessarily currently available/
+implemented in SiSU might include, formatting whether it is indented, or
+metadata e.g. the associated language, or programming language for a code block)
+
+</p>
+<p>
+
+<b>Document structure. Heading objects hold documents structure:</b> Heading
+objects hold documents structure through their heading level property. The types
+of document of interest to SiSU have structure that is captured by the heading
+level property. Headings are individual objects like any other with the
+additional properties that (i) they may be regarded as containing the other
+objects following them sequentially (until the next heading of a similar or
+higher level), heading objects may include other headings (sub-headings), and
+(ii) that they have a heirarchy, the root "heading" being the document
+title.<br>A complication was intruduced to provide greater flexibility across
+document output formats. Headings have two sets of levels, the level under which
+substantive text occurs, this would be a chapter or segment level, and above
+that in the heirarchy if needed are document section separators, book, section,
+part.
+
+</p>
+<p>
+
+<b>Non-objects</b> Most but not all parts of a document are treated as objects.
+Notably footnotes are not objects in themselves, rather belonging to the object
+from which they are referenced, and following their own numbering sequence. From
+heading objects (linked) tables of content may be generated, and if additional
+metadata is provided book type indexes can be generated that link back to the
+objects to which they relate.
+
+</p>
+<p>
+
+<b>The Document Header.</b> SiSU document have headers which contain document
+metadata, at a minimum the document title and author. In addition the document
+header may contain markup instruction (e.g. how to identify headings within the
+document, in which case those headings need not be found and treated
+accordingly)
+
+</p>
+<p>
+
+SiSU parsers have now been implemented in different programming paradigms and
+languages a couple of times, the chosen markup has been left unchanged though
+the document headers have been modified.
+
+This is the core of sisu, beyond which there is more but largely in the form of
+choices based on ... existing output formats and of implementation detail,
+deciding what attributes of objects, or within objects should be supported,
+extending markup to allow for the generation of book indexes from if tagging
+provided.
+
+</p>
+
+<h2>ℹ - SiSU Historical Descriptions</h2>
+
+<p>
 Here is a description that has been used for the original sisu (scribe):
 </p>
 
diff --git a/org/config_git.org b/org/config_git.org
index a76f0e8..1aa5744 100644
--- a/org/config_git.org
+++ b/org/config_git.org
@@ -79,8 +79,8 @@
 !markup/pod/*/tools/po4a/po/*/*.sst.po
 !markup/pod/*/tools/po4a/po/*/*.ssm.po
 !markup/pod/*/tools/po4a/po/*/*.ssi.po
-!spine-bespoke-output
-!spine-bespoke-output/**
+!markup/spine-bespoke-output/
+!markup/spine-bespoke-output/**
 .dub/**
 ,**/.dub/**
 tmp/**
diff --git a/org/spine-bespoke-output-homepage-html.org b/org/spine-bespoke-output-homepage-html.org
new file mode 100644
index 0000000..c980a7a
--- /dev/null
+++ b/org/spine-bespoke-output-homepage-html.org
@@ -0,0 +1,691 @@
+-*- mode: org -*-
+#+TITLE:       configuration git
+#+DESCRIPTION: documents - structuring, various output representations & search
+#+FILETAGS:    :spine:hub:
+#+AUTHOR:      Ralph Amissah
+#+EMAIL:       [[mailto:ralph.amissah@gmail.com][ralph.amissah@gmail.com]]
+#+COPYRIGHT:   Copyright (C) 2015 - 2023 Ralph Amissah
+#+LANGUAGE:    en
+#+STARTUP:     content hideblocks hidestars noindent entitiespretty
+#+PROPERTY:    header-args  :exports code
+#+PROPERTY:    header-args+ :noweb yes
+#+PROPERTY:    header-args+ :results no
+#+PROPERTY:    header-args+ :cache no
+#+PROPERTY:    header-args+ :padline no
+#+PROPERTY:    header-args+ :mkdirp yes
+#+OPTIONS:     H:3 num:nil toc:t \n:t ::t |:t ^:nil -:t f:t *:t
+
+#+HEADER: :tangle "../markup/spine-bespoke-output/html/homepage.index.html"
+#+BEGIN_SRC html
+<!DOCTYPE html>
+<html>
+<head>
+  <meta http-equiv="Content-Type" content="text/plain; charset=UTF-8" />
+  <title>≅ SiSU project sisudoc.org</title>
+  <link href="./css/html_seg.css" rel="stylesheet" />
+</head>
+
+<body>
+
+<h1>≅ - SiSU for documents - structuring, publishing in multiple
+formats &amp; search</h1>
+
+<h2>ℹ - A short description</h2>
+
+<p>
+
+SiSU is an object-centric, lightweight markup based, document structuring,
+parser, publishing and search tool for document collections. It is command line
+oriented and generates static content that is currently made searchable at an
+object level through an SQL database.
+Markup helps define (delineate) objects (primarily various types of text block)
+which are tracked in sequence, substantive objects being numbered sequentially
+by the program for object citation.
+
+</p>
+
+<h2>Δ - SiSU project source</h2>
+
+<p>
+    <a href="./projects">
+        Δ SiSU projects repo (git)
+    </a><br>
+    - <a href="https://git.sisudoc.org">
+        https://git.sisudoc.org
+    </a><br>
+</p>
+
+<p>
+    <a href="./projects/sisu">
+        Δ SiSU (scribe): document publishing (multiple formats + search)
+    </a><br>
+    - <a href="https://git.sisudoc.org/sisu">
+        https://git.sisudoc.org/sisu
+    </a><br>
+</p>
+
+<p>
+    <a href="./projects/sisu-markup">
+        Δ SiSU markup samples in document pods for sisu (scribe)
+    </a><br>
+    - <a href="https://git.sisudoc.org/sisu-markup">
+        https://git.sisudoc.org/sisu-markup
+    </a><br>
+</p>
+
+<h2>⌘ - SiSU Spine markup sample output</h2>
+
+<p>
+To give an idea of how this works here is a small collection of documents marked
+up for and generated by the software. The curation of topics for a collection of
+specialized related documents would benefit from a consistently applied bespoke
+ontology or thesaurus.<br> The documents presented are documents that have been
+released under various creative commons licences, in the public domain, or the
+author's work, with the exception of one that is under GPL and the old abandoned
+Debian live-manual
+</p>
+
+<p>
+    <a href="./authors.html">
+       ⌘ Authors
+    </a>
+    (software curated from provided document header metadata)<br>
+    - <a href="./authors.html">
+        https://sisudoc.org/spine/authors.html
+    </a>
+</p>
+
+<p>
+    <a href="./topics.html">
+       ⌘ Topics
+    </a>
+    (software curated from provided document header metadata)<br>
+    - <a href="./topics.html">
+        https://sisudoc.org/spine/topics.html
+    </a>
+</p>
+
+<h2>፨ - SiSU Spine search</h2>
+<p>
+    <a href="./spine_search">
+       ፨ Search
+    </a>
+    (granular search of text objects)<br>
+    - <a href="https://sisudoc.org/spine_search">
+        https://sisudoc.org/spine_search
+    </a>
+</p>
+
+<div class="p">
+    <!-- SiSU Spine Search -->
+    <form action="https://sisudoc.org/spine_search" target="_top" method="POST" accept-charset="UTF-8" id="search">
+    <input type="text" name="sf" size="24" maxlength="255">
+    <input type="hidden" name="db" value="spine.search.db">
+    <input type="hidden" name="sml" value="1000">
+    <input type="hidden" name="ec" value="on">
+    <input type="hidden" name="url" value="on">
+    <button type="submit" form="search">&nbsp;㏈&nbsp;፨&nbsp;</button>
+    </form>
+    <!-- SiSU Spine Search -->
+</div>
+
+<h2>ℹ - SiSU description</h2>
+
+<p>
+
+SiSU is an object-centric, lightweight markup based, document structuring,
+parser, publishing and search tool for document collections. It is command line
+oriented and generates static content that is currently made searchable at an
+object level through an SQL database.
+Markup helps define (delineate) objects (primarily various types of text block)
+which are tracked in sequence, substantive objects being numbered sequentially
+by the program for object citation.
+
+</p>
+<p>
+
+<b>Summary.</b> An object is a unit of text within a document the most common
+being a paragraph. Objects include individual headings, paragraphs, tables,
+grouped text of various types such as code blocks and within poems, verse.
+Objects have properties and attributes, of particular significance are headings
+and their levels which provide document structure. A heading is an object with a
+heirarchical value, that conceptually contains other objects (such as paragraphs
+and possibly sub-headings etc.). Objects are tracked sequentially as they relate
+to each other object within a document and substantive objects are numbered
+sequentially, for citation purposes. Notably footnotes are not objects in
+themselves, rather belonging to the object from which they are referenced, and
+following their own numbering sequence. From heading objects (linked) tables of
+content may be generated, and if additional metadata is provided book type
+indexes can be generated that link back to the objects to which they relate.
+
+</p>
+<p>
+
+<b>Unpacking this a bit further.</b> SiSU as a concept independent of its markup
+language and the parsers that have been implemented, is based on the following
+ideas:
+
+</p>
+<p>
+
+<b>Object-Centricity. On objects:</b> In SiSU objects are the fundamental unit
+from which larger constructs within a document and document itself is built.
+Breaking the document into objects provides interesting possibilities.
+
+</p>
+<p>
+
+<b>Objects are fundamental building blocks:</b> Conceptually within SiSU,
+objects are the building blocks or individual units of construction of a
+document. Objects are usually blocks of text, the most common of which is the
+paragraph, other examples include: individual headings, tables, grouped text of
+various types which include code blocks and verse within poems, ... and as
+mentioned an object could also, for example, be an image. Objects can be
+formatted and placed as needed, providing flexibility and enabling multiple
+types of representation across disperate formats and text recepticle, examples
+including html, epub, latex (in the past mind-maps) and sql (populated at an
+object level, and thereby providing search with that degree of granularity).
+
+</p>
+<p>
+
+<b>Sequential. Objects have sequence:</b> That objects have sequence, goes
+largely without saying, this follows authorship, it is part of the definition of
+a document and how a document is written to convey meaning.
+
+</p>
+<p>
+
+<b>Object Numbers & Citation. Substantive objects are numbered for citation
+purposes:</b> Most objects within a document are meant by the author to be a
+substantive part of the document. All such objects are numbered sequentially and
+can be referenced thereby for citation purposes.
+Object numbers provide the possibility of citing/locating text precisely across
+different document formats and different languages (assuming the document has
+been translated). For search it also makes it possible to identify precisely
+where search criteria is met within in each document in the form of an index or
+to view those precise text objects before deciding which documents are of
+interest. Additionally the use of objects (and that objects are numbered) frees
+the possibility to represent the document in the manner considered most suitable
+to a specific document format wilst retaining its structural (and citation)
+integrity).
+
+</p>
+<p>
+<b>Characteristics. Objects have properties and attributes:</b> Objects have
+properties (and may have attributes). By properties I here refer to the
+fundamental type of object, be it a heading, a paragraph, table, verse etc.
+Attributes extend further and may include other things that one might wish to
+associate with the object (examples not necessarily currently available/
+implemented in SiSU might include, formatting whether it is indented, or
+metadata e.g. the associated language, or programming language for a code block)
+
+</p>
+<p>
+
+<b>Document structure. Heading objects hold documents structure:</b> Heading
+objects hold documents structure through their heading level property. The types
+of document of interest to SiSU have structure that is captured by the heading
+level property. Headings are individual objects like any other with the
+additional properties that (i) they may be regarded as containing the other
+objects following them sequentially (until the next heading of a similar or
+higher level), heading objects may include other headings (sub-headings), and
+(ii) that they have a heirarchy, the root "heading" being the document
+title.<br>A complication was intruduced to provide greater flexibility across
+document output formats. Headings have two sets of levels, the level under which
+substantive text occurs, this would be a chapter or segment level, and above
+that in the heirarchy if needed are document section separators, book, section,
+part.
+
+</p>
+<p>
+
+<b>Non-objects</b> Most but not all parts of a document are treated as objects.
+Notably footnotes are not objects in themselves, rather belonging to the object
+from which they are referenced, and following their own numbering sequence. From
+heading objects (linked) tables of content may be generated, and if additional
+metadata is provided book type indexes can be generated that link back to the
+objects to which they relate.
+
+</p>
+<p>
+
+<b>The Document Header.</b> SiSU document have headers which contain document
+metadata, at a minimum the document title and author. In addition the document
+header may contain markup instruction (e.g. how to identify headings within the
+document, in which case those headings need not be found and treated
+accordingly)
+
+</p>
+<p>
+
+SiSU parsers have now been implemented in different programming paradigms and
+languages a couple of times, the chosen markup has been left unchanged though
+the document headers have been modified.
+
+This is the core of sisu, beyond which there is more but largely in the form of
+choices based on ... existing output formats and of implementation detail,
+deciding what attributes of objects, or within objects should be supported,
+extending markup to allow for the generation of book indexes from if tagging
+provided.
+
+</p>
+
+<h2>ℹ - SiSU Historical Descriptions</h2>
+
+<p>
+Here is a description that has been used for the original sisu (scribe):
+</p>
+
+<p>
+With minimal preparation of a plain-text (UTF-8) file, using sisu markup syntax
+in your text editor of choice, SiSU can generate various document formats, most
+of which share a common object numbering system for locating content, including
+plain text, HTML, XHTML, XML, EPUB, OpenDocument text (ODF:ODT), LaTeX, PDF
+files, and populate an SQL database with objects (roughly paragraph-sized
+chunks) so searches may be performed and matches returned with that degree of
+granularity. Think of being able to finely match text in documents, using common
+object numbers, across different output formats (same object identifier for pdf,
+epub or html) and across languages if you have translations of the same document
+(same object identifier across languages). For search, your criteria is met by
+these documents at these locations within each document (equally relevant across
+different output formats and languages). To be clear (if obvious) page numbers
+provide none of this functionality. Object numbering is particularly suitable
+for "published" works (finalized texts as opposed to works that are frequently
+changed or updated) for which it provides a fixed means of reference of content.
+Document outputs can also share provided semantic meta-data.
+</p>
+
+<h3>...</h3>
+
+<p>
+SiSU is less about document layout than it is about finding a way using little
+markup to construct an abstract representation of a document that makes it
+possible to produce multiple representations of it which may be rather different
+from each other and used for different purposes, whether layout and publishing,
+scrollworthy online viewing/ reading, or content search. To be able to take
+advantage from its minimal preparation starting point of some of the strengths
+of rather different established ways of representing documents for different
+purposes, whether for search (relational database, or indexed flat files
+generated for that purpose whether of complete documents, or say of files made
+up of objects), online or other electronic viewing (e.g. html, xml, epub), or
+paper publication (e.g. pdf via latex)...
+</p>
+
+<p>
+The solution arrived at is to extract structural information about the document
+(document sections and headings within the document, available through pattern
+matching or markup) and tracking objects (which primarily are defined units of
+text such as paragraphs, headings, tables, verse, etc. but also images) which
+can be reconstituted as the same documents with relevant object identification
+numbers so text (objects) can be referenced across different output formats and
+presentations.
+</p>
+
+<p>
+SiSU generates tables of content, and through its markup the means for metadata
+to be provided for the generation of book style indexes for a document (that
+again due to document object numbers are the same and equally relevant across
+all document formats). Per document classifying/organizing metadata can also be
+provided for automated document curation.
+</p>
+
+<p>
+... there have also been working experiments with sisu markup source, two way
+conversion/representation of sisu document markup source in mind-mapping
+(software kdissert was used for its strong focus on producing documents (now
+apparently called semantik)); also po4a software for translators has been used
+successfuly in its regular text mode for sisu markup in translation, (which is
+more an attribute of po4a than of sisu, but) which is of interest due to
+sisu/spine's object citation numbering being available across translations. Open
+Document Format text (odf:odt), has been an output, but much more interesting
+(and requested by potential users of sisu/spine) would be the ability of a word
+processor to save text/a document in sisu markup, making alternative document
+processing and presentations with sisu possible.
+</p>
+
+<p>
+also worth mention, in the relatively long history of this project, there has
+been work done on extracting hash representations of each object, that could
+hypothetically be shared to prove the content of a document without sharing its
+content, or of identifying which objects change; these hashes can also be used
+as unique identifiers in a database or as identifying filenames if individual
+objects are saved.
+</p>
+
+<p>
+SiSU has evolved, the current implementation focuses on one primary use-case,
+books and literary writings. However the concept on which it is based has wider
+application. Here is a prevously posted souvenir from my encounter with an IBM
+software evaluator in London June 2004 that came about through a chance
+encounter with an IBM manager at a Linux Expo, who was curious about my interest
+in Gnu/Linux with my legal background... on hearing that I also wrote software,
+he suggested, maybe IBM should have a look at it. I was interested, the meeting
+was set up... with an IBM, Software Innovations evaluator<br>His response after
+the meeting:
+</p>
+
+<p>
+"Ralph<br>Good to meet with you today, I was very impressed with your
+software.<br><i>[colleague's name (also posted to an IBM colleague)]</i> - in
+summary - Ralph has built an application that runs on linux and takes ASCII
+documents and pulls them apart in to the smallest constituent parts, storing
+them as XML, PDF and HTML, the HTML are hyperlinked up so the document can be
+browsed in its full form. the format and text data created is stored in a
+database.<br>This has potential in any place that needs the power of full text
+search whilst holding the structural concepts of the document i.e. legal,
+pharma, education, research.. which ones we need to figure out, ..."
+</p>
+
+<p>
+Special interest was expressed in the search implications of SiSU. To
+paraphrase, the company has document management systems dealing with hundreds of
+thousands of texts, these tell you which documents match your search criteria,
+but cannot inform you where within a text these matches were found without
+opening the documents. This is achieved through defining document objects and
+making them the building block of the document, trackable document objects (that
+can be placed back in the context of the document or corpus of documents if part
+of a collection). SiSU's early design was to - abstract documents to their
+structure, and identified objects, numbered in a citable way (as pointed out
+document object hashes can be of use for the purpose).
+</p>
+
+<h2>ℹ - SiSU Spine</h2>
+
+<p>
+SiSU Spine is the new generator for documents prepared in sisu markup, written
+in D as opposed to the original sisu which was first shared in Ruby.
+</p>
+
+<p>
+Spine code has not as yet been made publicly available.
+</p>
+
+<p>
+As compared with the original sisu generator sisu spine:
+</p>
+
+<p>
+- Spine uses the same document markup for the document body, but uses yaml for
+document headers (which contains document metadata and configuration details),
+the original sisu has a bespoke markup for headers.
+</p>
+
+<p>
+- Spine (written in D) is considerably faster at generating native output than
+sisu (written in Ruby), on last test at least 60 times faster (what took 1
+minute takes 1 second; 1 hour a minute :-) (admittedly some time ago, ruby has
+been getting faster, hopefully this is not over over promising).
+</p>
+
+<p>
+- Spine produces fewer document outputs types than sisu (html, epub, (odt,
+latex) and populates sql db for search)
+</p>
+
+<p>
+- As regards non-native output, so far Spine has greater separation of what it
+does and largely leaves calling the external program to the user, e.g.: latex
+output is a native output in the sense that it is generated directly by spine,
+but the pdfs that can be produced from these are produced through use of an
+external program xelatex, which produces fine output but is a very much slower
+process.
+</p>
+
+<p>
+- (where both produce the same output type, generally) Spine generally produces
+more up to date output format representations.
+</p>
+
+<hr>
+<p class="tiny"><i>
+ralph.amissah www since 1993 ;-)
+</i></p>
+
+<hr>
+<h2>Some external links of interest</h2>
+
+<h3>Development</h3>
+<h4>Programming</h4>
+<p>
+    [ <a href="https://dlang.org/">
+        D - (dlang) general purpose, multi-paradigm, fast C like programming language
+    </a> ]
+    [ <a href="https://code.dlang.org/">
+        dub - package registry
+    </a> ]
+    [ <a href="https://forum.dlang.org/group/general">
+        community discussion (mail list frontend)
+    </a> ]<br>
+</p>
+<p>
+    [ <a href="https://www.ruby-lang.org/en/">
+        Ruby
+    </a> ]
+    [ <a href="https://rubygems.org/">
+        Gems
+    </a> ]<br>
+    [ <a href="https://crystal-lang.org/">
+        Crystal
+    </a> ]<br>
+</p>
+<h4>SQL DB</h4>
+<p>
+    [ <a href="https://sqlite.org/index.html">
+        Sqlite - an sql database engine
+    </a> ]<br>
+    [ <a href="https://www.postgresql.org/">
+        PostgreSQL
+    </a> ]<br>
+</p>
+<h4>Markup</h4>
+<p>
+    [ <a href="https://www.w3.org/html/">
+        HTML
+    </a> ]
+    [ <a href="https://html.spec.whatwg.org/multipage/">
+        multipage current spec
+    </a> ]
+    [ <a href="https://dom.spec.whatwg.org/">
+        dom current spec
+    </a> ]<br>
+    [ <a href="https://www.w3.org/publishing/epub32/">
+        Epub
+    </a> ]<br>
+    [ <a href="https://www.w3.org/Style/CSS/">
+        css - cascading style sheets
+    </a> ]<br>
+</p>
+<p>
+    [ <a href="https://opendocumentformat.org/">
+        OpenDocument Format
+    </a> ]<br>
+</p>
+<p>
+    [ <a href="https://www.latex-project.org/get/">
+        LaTeX
+    </a> ]<br>
+</p>
+<p>
+    [ <a href="https://po4a.org/index.php.en">
+        po4a - maintain translations
+    </a> ]<br>
+</p>
+<h4>Operating System Distributions</h4>
+<p>
+    [ <a href="https://nixos.org/">
+        NixOS - linux based operating system built on the Nix declarative, reproducible and reliable, build system
+    </a> ]
+    [ <a href="https://github.com/NixOS/nixpkgs">
+        nixpkgs (packages @ github)
+    </a> ]
+    [ <a href="https://search.nixos.org/packages?channel=unstable&from=0&size=100&sort=relevance&query=">
+        package search
+    </a> ]
+    [ <a href="https://discourse.nixos.org/">
+        community discussion (discourse)
+    </a> ]<br>
+    Gnu [ <a href="https://guix.gnu.org/">
+        Guix
+    </a> ]
+    [ <a href="https://guix.gnu.org/en/packages/">
+       packages
+    </a> ]
+    <br>
+</p>
+<p>
+    [ <a href="https://debian.org/">
+        Debian - the universal operating system distribution
+    </a> ]<br>
+    [ <a href="https://www.devuan.org/">
+        Devuan
+    </a> ]<br>
+</p>
+<p>
+    [ <a href="https://archlinux.org/">
+        Arch Linux
+    </a> ]
+    [ <a href="https://wiki.archlinux.org/">
+        Arch Wiki
+    </a> ]<br>
+</p>
+
+<hr>
+
+<h2>Extraneous (external) links of personal interest</h2>
+
+<h4>Workspace</h4>
+
+<h5>Shell</h5>
+<p>
+    [ <a href="https://www.zsh.org/">
+        zsh
+    </a> ]<br>
+    [ <a href="https://starship.rs/">
+        starship - customizable cross-shell prompt
+    </a> ]<br>
+</p>
+<h5>Terminal</h5>
+<p>
+    [ <a href="https://gnunn1.github.io/tilix-web/">
+        tilix
+    </a> ]
+    [ <a href="https://alacritty.org/">
+        alacritty
+    </a> ]<br>
+</p>
+<h5>Terminal Multiplexer</h5>
+<p>
+    [ <a href="https://github.com/tmux/tmux">
+        tmux (github)
+    </a> ]
+    [ <a href="https://www.gnu.org/software/screen/">
+        screen
+    </a> ]<br>
+</p>
+<h5>Window Manager</h5>
+<p>
+    [ <a href="https://i3wm.org/">
+        i3wm
+    </a> ]
+    [ <a href="https://swaywm.org/">
+        sway
+    </a> ]<br>
+</p>
+<h5>Text Editors</h5>
+<p>
+    Gnu Emacs
+    [ <a href="https://github.com/hlissner/doom-emacs">
+        Doom Emacs (github)
+    </a> ]
+    [ <a href="https://orgmode.org/">
+        Org-Mode - your life in plain text & literate programming
+    </a> ]
+    [ <a href="https://github.com/emacs-evil/evil">
+        Evil-Mode
+    </a> ]<br>
+</p>
+<p>
+    [ <a href="https://www.vim.org/">
+        Vim
+    </a> ]
+    [ <a href="https://neovim.io/">
+        NeoVim
+    </a> ]<br>
+</p>
+<h5>Source Control Manager</h5>
+<p>
+    [ <a href="https://git-scm.com/">
+        Git
+    </a> ]<br>
+</p>
+<h5>Browsers</h5>
+<p>
+    [ <a href="https://vieb.dev/">
+        vieb
+    </a> ]
+    [ <a href="https://fanglingsu.github.io/vimb/">
+        vimb
+    </a> ]<br>
+    [ <a href="https://brave.com/">
+        brave
+    </a> ]<br>
+</p>
+
+<h3>Search</h3>
+<p>
+    [ <a href="https://duckduckgo.com/">
+        DuckDuckGo
+    </a> ]
+    [ <a href="https://yubnub.org/">
+        YubNub
+    </a> ]<br>
+</p>
+
+<h3>eMail</h3>
+<p>
+    [ <a href="https://www.migadu.com/">
+       Migadu
+    </a> ]<br>
+</p>
+<p>
+    [ <a href="https://notmuchmail.org/">
+       NotmuchMail
+    </a> ]<br>
+</p>
+
+<h3>Forges</h3>
+<p>
+    [ <a href="https://sourcehut.org/">
+        Sourcehut
+    </a> ]<br>
+</p>
+<p>
+    [ <a href="https://codeberg.org/">
+        CodeBerg
+    </a> ]<br>
+</p>
+<p>
+    [ <a href="https://github.com">
+        GitHub
+    </a> ]
+    [ <a href="https://gitlab.com">
+        GitLab
+    </a> ]<br>
+</p>
+
+<h3>Software Archives</h3>
+<p>
+    [ <a href="https://www.softwareheritage.org/">
+        Software Heritage - the universal software archive
+    </a> ]<br>
+</p>
+
+<hr>
+<p class="tiny"><i>
+ralph.amissah www since 1993 ;-)
+</i></p>
+
+</body>
+</html>
+#+END_SRC