fixed maven repository URL
[sixth-data.git] / doc / index.html
index 8793e45..584f5d0 100644 (file)
 <?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
-        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
 <head>
-    <!-- 2016-08-03 Wed 23:45 -->
-    <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
-    <meta name="viewport" content="width=device-width, initial-scale=1"/>
-    <title>Sixth - system for data storage, computation, exploration and interaction</title>
-    <meta name="generator" content="Org-mode"/>
-    <meta name="author" content="Svjatoslav Agejenko"/>
-    <style type="text/css">
-        <!-- /*--><![CDATA[/*><!--*/
-        .title {
-            text-align: center;
-            margin-bottom: .2em;
-        }
-
-        .subtitle {
-            text-align: center;
-            font-size: medium;
-            font-weight: bold;
-            margin-top: 0;
-        }
-
-        .todo {
-            font-family: monospace;
-            color: red;
-        }
-
-        .done {
-            font-family: monospace;
-            color: green;
-        }
-
-        .priority {
-            font-family: monospace;
-            color: orange;
-        }
-
-        .tag {
-            background-color: #eee;
-            font-family: monospace;
-            padding: 2px;
-            font-size: 80%;
-            font-weight: normal;
-        }
-
-        .timestamp {
-            color: #bebebe;
-        }
-
-        .timestamp-kwd {
-            color: #5f9ea0;
-        }
-
-        .org-right {
-            margin-left: auto;
-            margin-right: 0px;
-            text-align: right;
-        }
-
-        .org-left {
-            margin-left: 0px;
-            margin-right: auto;
-            text-align: left;
-        }
-
-        .org-center {
-            margin-left: auto;
-            margin-right: auto;
-            text-align: center;
-        }
-
-        .underline {
-            text-decoration: underline;
-        }
-
-        #postamble p, #preamble p {
-            font-size: 90%;
-            margin: .2em;
-        }
-
-        p.verse {
-            margin-left: 3%;
-        }
-
-        pre {
-            border: 1px solid #ccc;
-            box-shadow: 3px 3px 3px #eee;
-            padding: 8pt;
-            font-family: monospace;
-            overflow: auto;
-            margin: 1.2em;
-        }
-
-        pre.src {
-            position: relative;
-            overflow: visible;
-            padding-top: 1.2em;
-        }
-
-        pre.src:before {
-            display: none;
-            position: absolute;
-            background-color: white;
-            top: -10px;
-            right: 10px;
-            padding: 3px;
-            border: 1px solid black;
-        }
-
-        pre.src:hover:before {
-            display: inline;
-        }
-
-        pre.src-sh:before {
-            content: 'sh';
-        }
-
-        pre.src-bash:before {
-            content: 'sh';
-        }
-
-        pre.src-emacs-lisp:before {
-            content: 'Emacs Lisp';
-        }
-
-        pre.src-R:before {
-            content: 'R';
-        }
-
-        pre.src-perl:before {
-            content: 'Perl';
-        }
-
-        pre.src-java:before {
-            content: 'Java';
-        }
-
-        pre.src-sql:before {
-            content: 'SQL';
-        }
-
-        table {
-            border-collapse: collapse;
-        }
-
-        caption.t-above {
-            caption-side: top;
-        }
-
-        caption.t-bottom {
-            caption-side: bottom;
-        }
-
-        td, th {
-            vertical-align: top;
-        }
-
-        th.org-right {
-            text-align: center;
-        }
-
-        th.org-left {
-            text-align: center;
-        }
-
-        th.org-center {
-            text-align: center;
-        }
-
-        td.org-right {
-            text-align: right;
-        }
-
-        td.org-left {
-            text-align: left;
-        }
-
-        td.org-center {
-            text-align: center;
-        }
-
-        dt {
-            font-weight: bold;
-        }
-
-        .footpara {
-            display: inline;
-        }
-
-        .footdef {
-            margin-bottom: 1em;
-        }
-
-        .figure {
-            padding: 1em;
-        }
-
-        .figure p {
-            text-align: center;
-        }
-
-        .inlinetask {
-            padding: 10px;
-            border: 2px solid gray;
-            margin: 10px;
-            background: #ffffcc;
-        }
-
-        #org-div-home-and-up {
-            text-align: right;
-            font-size: 70%;
-            white-space: nowrap;
-        }
-
-        textarea {
-            overflow-x: auto;
-        }
-
-        .linenr {
-            font-size: smaller
-        }
-
-        .code-highlighted {
-            background-color: #ffff00;
-        }
-
-        .org-info-js_info-navigation {
-            border-style: none;
-        }
-
-        #org-info-js_console-label {
-            font-size: 10px;
-            font-weight: bold;
-            white-space: nowrap;
-        }
+<!-- 2022-10-30 Sun 12:09 -->
+<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
+<meta name="viewport" content="width=device-width, initial-scale=1" />
+<title>Sixth Data - Data storage and computing engine</title>
+<meta name="author" content="Svjatoslav Agejenko" />
+<meta name="generator" content="Org Mode" />
+<style>
+  #content { max-width: 60em; margin: auto; }
+  .title  { text-align: center;
+             margin-bottom: .2em; }
+  .subtitle { text-align: center;
+              font-size: medium;
+              font-weight: bold;
+              margin-top:0; }
+  .todo   { font-family: monospace; color: red; }
+  .done   { font-family: monospace; color: green; }
+  .priority { font-family: monospace; color: orange; }
+  .tag    { background-color: #eee; font-family: monospace;
+            padding: 2px; font-size: 80%; font-weight: normal; }
+  .timestamp { color: #bebebe; }
+  .timestamp-kwd { color: #5f9ea0; }
+  .org-right  { margin-left: auto; margin-right: 0px;  text-align: right; }
+  .org-left   { margin-left: 0px;  margin-right: auto; text-align: left; }
+  .org-center { margin-left: auto; margin-right: auto; text-align: center; }
+  .underline { text-decoration: underline; }
+  #postamble p, #preamble p { font-size: 90%; margin: .2em; }
+  p.verse { margin-left: 3%; }
+  pre {
+    border: 1px solid #e6e6e6;
+    border-radius: 3px;
+    background-color: #f2f2f2;
+    padding: 8pt;
+    font-family: monospace;
+    overflow: auto;
+    margin: 1.2em;
+  }
+  pre.src {
+    position: relative;
+    overflow: auto;
+  }
+  pre.src:before {
+    display: none;
+    position: absolute;
+    top: -8px;
+    right: 12px;
+    padding: 3px;
+    color: #555;
+    background-color: #f2f2f299;
+  }
+  pre.src:hover:before { display: inline; margin-top: 14px;}
+  /* Languages per Org manual */
+  pre.src-asymptote:before { content: 'Asymptote'; }
+  pre.src-awk:before { content: 'Awk'; }
+  pre.src-authinfo::before { content: 'Authinfo'; }
+  pre.src-C:before { content: 'C'; }
+  /* pre.src-C++ doesn't work in CSS */
+  pre.src-clojure:before { content: 'Clojure'; }
+  pre.src-css:before { content: 'CSS'; }
+  pre.src-D:before { content: 'D'; }
+  pre.src-ditaa:before { content: 'ditaa'; }
+  pre.src-dot:before { content: 'Graphviz'; }
+  pre.src-calc:before { content: 'Emacs Calc'; }
+  pre.src-emacs-lisp:before { content: 'Emacs Lisp'; }
+  pre.src-fortran:before { content: 'Fortran'; }
+  pre.src-gnuplot:before { content: 'gnuplot'; }
+  pre.src-haskell:before { content: 'Haskell'; }
+  pre.src-hledger:before { content: 'hledger'; }
+  pre.src-java:before { content: 'Java'; }
+  pre.src-js:before { content: 'Javascript'; }
+  pre.src-latex:before { content: 'LaTeX'; }
+  pre.src-ledger:before { content: 'Ledger'; }
+  pre.src-lisp:before { content: 'Lisp'; }
+  pre.src-lilypond:before { content: 'Lilypond'; }
+  pre.src-lua:before { content: 'Lua'; }
+  pre.src-matlab:before { content: 'MATLAB'; }
+  pre.src-mscgen:before { content: 'Mscgen'; }
+  pre.src-ocaml:before { content: 'Objective Caml'; }
+  pre.src-octave:before { content: 'Octave'; }
+  pre.src-org:before { content: 'Org mode'; }
+  pre.src-oz:before { content: 'OZ'; }
+  pre.src-plantuml:before { content: 'Plantuml'; }
+  pre.src-processing:before { content: 'Processing.js'; }
+  pre.src-python:before { content: 'Python'; }
+  pre.src-R:before { content: 'R'; }
+  pre.src-ruby:before { content: 'Ruby'; }
+  pre.src-sass:before { content: 'Sass'; }
+  pre.src-scheme:before { content: 'Scheme'; }
+  pre.src-screen:before { content: 'Gnu Screen'; }
+  pre.src-sed:before { content: 'Sed'; }
+  pre.src-sh:before { content: 'shell'; }
+  pre.src-sql:before { content: 'SQL'; }
+  pre.src-sqlite:before { content: 'SQLite'; }
+  /* additional languages in org.el's org-babel-load-languages alist */
+  pre.src-forth:before { content: 'Forth'; }
+  pre.src-io:before { content: 'IO'; }
+  pre.src-J:before { content: 'J'; }
+  pre.src-makefile:before { content: 'Makefile'; }
+  pre.src-maxima:before { content: 'Maxima'; }
+  pre.src-perl:before { content: 'Perl'; }
+  pre.src-picolisp:before { content: 'Pico Lisp'; }
+  pre.src-scala:before { content: 'Scala'; }
+  pre.src-shell:before { content: 'Shell Script'; }
+  pre.src-ebnf2ps:before { content: 'ebfn2ps'; }
+  /* additional language identifiers per "defun org-babel-execute"
+       in ob-*.el */
+  pre.src-cpp:before  { content: 'C++'; }
+  pre.src-abc:before  { content: 'ABC'; }
+  pre.src-coq:before  { content: 'Coq'; }
+  pre.src-groovy:before  { content: 'Groovy'; }
+  /* additional language identifiers from org-babel-shell-names in
+     ob-shell.el: ob-shell is the only babel language using a lambda to put
+     the execution function name together. */
+  pre.src-bash:before  { content: 'bash'; }
+  pre.src-csh:before  { content: 'csh'; }
+  pre.src-ash:before  { content: 'ash'; }
+  pre.src-dash:before  { content: 'dash'; }
+  pre.src-ksh:before  { content: 'ksh'; }
+  pre.src-mksh:before  { content: 'mksh'; }
+  pre.src-posh:before  { content: 'posh'; }
+  /* Additional Emacs modes also supported by the LaTeX listings package */
+  pre.src-ada:before { content: 'Ada'; }
+  pre.src-asm:before { content: 'Assembler'; }
+  pre.src-caml:before { content: 'Caml'; }
+  pre.src-delphi:before { content: 'Delphi'; }
+  pre.src-html:before { content: 'HTML'; }
+  pre.src-idl:before { content: 'IDL'; }
+  pre.src-mercury:before { content: 'Mercury'; }
+  pre.src-metapost:before { content: 'MetaPost'; }
+  pre.src-modula-2:before { content: 'Modula-2'; }
+  pre.src-pascal:before { content: 'Pascal'; }
+  pre.src-ps:before { content: 'PostScript'; }
+  pre.src-prolog:before { content: 'Prolog'; }
+  pre.src-simula:before { content: 'Simula'; }
+  pre.src-tcl:before { content: 'tcl'; }
+  pre.src-tex:before { content: 'TeX'; }
+  pre.src-plain-tex:before { content: 'Plain TeX'; }
+  pre.src-verilog:before { content: 'Verilog'; }
+  pre.src-vhdl:before { content: 'VHDL'; }
+  pre.src-xml:before { content: 'XML'; }
+  pre.src-nxml:before { content: 'XML'; }
+  /* add a generic configuration mode; LaTeX export needs an additional
+     (add-to-list 'org-latex-listings-langs '(conf " ")) in .emacs */
+  pre.src-conf:before { content: 'Configuration File'; }
+
+  table { border-collapse:collapse; }
+  caption.t-above { caption-side: top; }
+  caption.t-bottom { caption-side: bottom; }
+  td, th { vertical-align:top;  }
+  th.org-right  { text-align: center;  }
+  th.org-left   { text-align: center;   }
+  th.org-center { text-align: center; }
+  td.org-right  { text-align: right;  }
+  td.org-left   { text-align: left;   }
+  td.org-center { text-align: center; }
+  dt { font-weight: bold; }
+  .footpara { display: inline; }
+  .footdef  { margin-bottom: 1em; }
+  .figure { padding: 1em; }
+  .figure p { text-align: center; }
+  .equation-container {
+    display: table;
+    text-align: center;
+    width: 100%;
+  }
+  .equation {
+    vertical-align: middle;
+  }
+  .equation-label {
+    display: table-cell;
+    text-align: right;
+    vertical-align: middle;
+  }
+  .inlinetask {
+    padding: 10px;
+    border: 2px solid gray;
+    margin: 10px;
+    background: #ffffcc;
+  }
+  #org-div-home-and-up
+   { text-align: right; font-size: 70%; white-space: nowrap; }
+  textarea { overflow-x: auto; }
+  .linenr { font-size: smaller }
+  .code-highlighted { background-color: #ffff00; }
+  .org-info-js_info-navigation { border-style: none; }
+  #org-info-js_console-label
+    { font-size: 10px; font-weight: bold; white-space: nowrap; }
+  .org-info-js_search-highlight
+    { background-color: #ffff00; color: #000000; font-weight: bold; }
+  .org-svg { }
+</style>
+<link href="https://bootswatch.com/3/darkly/bootstrap.min.css" rel="stylesheet">
+<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.5/js/bootstrap.min.js"></script>
+<style type="text/css">
+footer {background-color: #111 !important;}
+pre {background-color: #111; color: #ccc;}
+</style>
+<link rel="stylesheet" type="text/css" href="https://thomasf.github.io/solarized-css/solarized-dark.min.css" />
+</head>
+<body>
+<div id="content" class="content">
+<h1 class="title">Sixth Data - Data storage and computing engine</h1>
+<div id="table-of-contents" role="doc-toc">
+<h2>Table of Contents</h2>
+<div id="text-table-of-contents" role="doc-toc">
+<ul>
+<li><a href="#org575e4cf">1. General</a>
+<ul>
+<li><a href="#org960610f">1.1. Source code</a></li>
+</ul>
+</li>
+<li><a href="#orga6ad9b1">2. Vision / goal</a></li>
+<li><a href="#org923cf0c">3. Inspiration</a>
+<ul>
+<li><a href="#org6e89e58">3.1. Brain</a></li>
+<li><a href="#org75acc06">3.2. CM-1 Connection Machine</a></li>
+</ul>
+</li>
+<li><a href="#orgcce2d30">4. Reasons for hypercube as a so called first class citizen</a></li>
+<li><a href="#orga5de57b">5. Geometrical computation idea</a>
+<ul>
+<li><a href="#org7c36ce8">5.1. Distributed computation and data storage</a></li>
+<li><a href="#orgb3e5e90">5.2. Mapping hypercube to object-oriented model and relational database</a></li>
+<li><a href="#orgad3411a">5.3. Mapping entity relations in hypercube</a></li>
+</ul>
+</li>
+<li><a href="#orge747c35">6. Current status</a></li>
+</ul>
+</div>
+</div>
 
-        .org-info-js_search-highlight {
-            background-color: #ffff00;
-            color: #000000;
-            font-weight: bold;
-        }
+<div id="outline-container-org575e4cf" class="outline-2">
+<h2 id="org575e4cf"><span class="section-number-2">1.</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>This program is free software: released under Creative Commons Zero
+(CC0) license</li>
+
+<li>Program author:
+<ul class="org-ul">
+<li>Svjatoslav Agejenko</li>
+<li>Homepage: <a href="https://svjatoslav.eu">https://svjatoslav.eu</a></li>
+<li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">mailto://svjatoslav@svjatoslav.eu</a></li>
+</ul></li>
+
+<li><a href="https://www.svjatoslav.eu/projects/">Other software projects hosted at svjatoslav.eu</a></li>
+</ul>
+</div>
 
-        /*]]>*/
-        -->
-    </style>
-    <link rel="stylesheet" type="text/css" href="http://thomasf.github.io/solarized-css/solarized-dark.min.css"/>
-    <script type="text/javascript">
-        /*
-         @licstart  The following is the entire license notice for the
-         JavaScript code in this tag.
+<div id="outline-container-org960610f" class="outline-3">
+<h3 id="org960610f"><span class="section-number-3">1.1.</span> Source code</h3>
+<div class="outline-text-3" id="text-1-1">
+<ul class="org-ul">
+<li><a href="https://www2.svjatoslav.eu/gitweb/?p=sixth-data.git;a=snapshot;h=HEAD;sf=tgz">Download latest snapshot in TAR GZ format</a></li>
 
-         Copyright (C) 2012-2013 Free Software Foundation, Inc.
+<li><a href="https://www2.svjatoslav.eu/gitweb/?p=sixth-data.git;a=summary">Browse Git repository online</a></li>
 
-         The JavaScript code in this tag is free software: you can
-         redistribute it and/or modify it under the terms of the GNU
-         General Public License (GNU GPL) as published by the Free Software
-         Foundation, either version 3 of the License, or (at your option)
-         any later version.  The code is distributed WITHOUT ANY WARRANTY;
-         without even the implied warranty of MERCHANTABILITY or FITNESS
-         FOR A PARTICULAR PURPOSE.  See the GNU GPL for more details.
+<li><p>
+Clone Git repository using command:
+</p>
+<pre class="example">
+git clone https://www2.svjatoslav.eu/git/sixth-data.git
+</pre></li>
 
-         As additional permission under GNU GPL version 3 section 7, you
-         may distribute non-source (e.g., minimized or compacted) forms of
-         that code without the copy of the GNU GPL normally required by
-         section 4, provided you include this license notice and a URL
-         through which recipients can access the Corresponding Source.
+<li>See <a href="https://www3.svjatoslav.eu/projects/sixth-data/apidocs/">JavaDoc</a>.</li>
+</ul>
+</div>
+</div>
+</div>
 
+<div id="outline-container-orga6ad9b1" class="outline-2">
+<h2 id="orga6ad9b1"><span class="section-number-2">2.</span> Vision / goal</h2>
+<div class="outline-text-2" id="text-2">
+<p>
+Provide hackable, versioned, optimized, distributed, geometrical,
+arbitrary dimensional (<a href="#orgcce2d30">hypercube based</a>) data storage and computation
+engine (<a href="#org6e89e58">as inspired by the brain</a>) for general purpose visual computing
+environment called <a href="http://www2.svjatoslav.eu/gitbrowse/sixth/doc/index.html">Sixth</a>.
+</p>
+
+<p>
+Because <a href="http://www.paulgraham.com/rootsoflisp.html">Lisp is hackable self defined programmable programming
+language</a> it would be used to provide <a href="https://en.wikipedia.org/wiki/Imperative_programming">imperative programming</a> support.
+</p>
+</div>
+</div>
+<div id="outline-container-org923cf0c" class="outline-2">
+<h2 id="org923cf0c"><span class="section-number-2">3.</span> Inspiration</h2>
+<div class="outline-text-2" id="text-3">
+<ul class="org-ul">
+<li>see also: <a href="https://en.wikipedia.org/wiki/OLAP_cube">OLAP cube</a>.</li>
+</ul>
+</div>
+<div id="outline-container-org6e89e58" class="outline-3">
+<h3 id="org6e89e58"><span class="section-number-3">3.1.</span> Brain</h3>
+<div class="outline-text-3" id="text-3-1">
+<ul class="org-ul">
+<li>Brain appears to be natural geometrical/parallel data storage and
+computational engine:
+<ul class="org-ul">
+<li><a href="https://www.quantamagazine.org/the-brain-maps-out-ideas-and-memories-like-spaces-20190114/">https://www.quantamagazine.org/the-brain-maps-out-ideas-and-memories-like-spaces-20190114/</a></li>
+<li><a href="https://www.simonsfoundation.org/2021/04/07/geometrical-thinking-offers-a-window-into-computation/">Geometrical Thinking Offers a Window Into Computation</a></li>
+</ul></li>
+
+<li>Even more awesome is that brain appears to operate and is wired as
+arbitrary/variable dimensional structure:
+<a href="https://singularityhub.com/2017/06/21/is-there-a-multidimensional-mathematical-world-hidden-in-the-brains-computation/">https://singularityhub.com/2017/06/21/is-there-a-multidimensional-mathematical-world-hidden-in-the-brains-computation/</a></li>
+
+<li>On top of this, this multidimensional space that brain represents
+has dynamic/variable resolution/density:
+<ul class="org-ul">
+<li><a href="https://www.quantamagazine.org/goals-and-rewards-redraw-the-brains-map-of-the-world-20190328">https://www.quantamagazine.org/goals-and-rewards-redraw-the-brains-map-of-the-world-20190328</a></li>
+</ul></li>
+
+<li>Such properties allow parallel <a href="#orga5de57b">Geometrical computation</a> and
+beautifully fits <a href="#org75acc06">CM-1 Connection Machine</a> architecture (for extra
+hardware accelerated solution).</li>
+</ul>
+</div>
+</div>
 
-         @licend  The above is the entire license notice
-         for the JavaScript code in this tag.
-         */
-        <!--/*--><![CDATA[/*><!--*/
-        function CodeHighlightOn(elem, id) {
-            var target = document.getElementById(id);
-            if (null != target) {
-                elem.cacheClassElem = elem.className;
-                elem.cacheClassTarget = target.className;
-                target.className = "code-highlighted";
-                elem.className = "code-highlighted";
-            }
-        }
-        function CodeHighlightOff(elem, id) {
-            var target = document.getElementById(id);
-            if (elem.cacheClassElem)
-                elem.className = elem.cacheClassElem;
-            if (elem.cacheClassTarget)
-                target.className = elem.cacheClassTarget;
-        }
-        /*]]>*///-->
-    </script>
-</head>
-<body>
-<div id="content">
-    <h1 class="title">Sixth - system for data storage, computation, exploration and interaction</h1>
-    <div id="table-of-contents">
-        <h2>Table of Contents</h2>
-        <div id="text-table-of-contents">
-            <ul>
-                <li><a href="#orgheadline1">1. Current status</a></li>
-            </ul>
-        </div>
-    </div>
-    <hr/>
-    <ul class="org-ul">
-        <li>This is a subproject of <a href="http://www2.svjatoslav.eu/gitbrowse/sixth/doc/index.html">Sixth</a></li>
 
-        <li><a href="http://www2.svjatoslav.eu/gitweb/?p=sixth.git;a=snapshot;h=HEAD;sf=tgz">download latest
-            snapshot</a></li>
+<div id="outline-container-org75acc06" class="outline-3">
+<h3 id="org75acc06"><span class="section-number-3">3.2.</span> CM-1 Connection Machine</h3>
+<div class="outline-text-3" id="text-3-2">
+<p>
+<a href="https://en.wikipedia.org/wiki/Connection_Machine">https://en.wikipedia.org/wiki/Connection_Machine</a>
+</p>
+
+<p>
+Massively parallel (thousands of CPUs) connected via
+machine's internal 12-dimensional hypercube network allows to
+efficiently simulate arbitrary dimensional hypercube and network
+topology between computational units. So that when we are
+solving/simulating for example 5 dimensional problem, we can arrange
+computational units into virtual 5D network. See:
+<a href="http://www.mission-base.com/tamiko/theory/cm_txts/di-ch2.html">http://www.mission-base.com/tamiko/theory/cm_txts/di-ch2.html</a>
+</p>
+
+<p>
+we can pre-distribute data across computation units and perform
+parallel <a href="#orga5de57b">geometrical computation</a>.
+</p>
+</div>
+</div>
+</div>
 
-        <li>This program is free software; you can redistribute it and/or modify
-            it under the terms of version 3 of the <a href="https://www.gnu.org/licenses/lgpl.html">GNU Lesser General
-                Public
-                License</a> or later as published by the Free Software Foundation.
-        </li>
+<div id="outline-container-orgcce2d30" class="outline-2">
+<h2 id="orgcce2d30"><span class="section-number-2">4.</span> Reasons for hypercube as a so called first class citizen</h2>
+<div class="outline-text-2" id="text-4">
+<ul class="org-ul">
+<li>Hypercube is quite general purpose data structure that naturally
+encapsulates wide variety data and problems.</li>
 
-        <li>Program author:
-            <ul class="org-ul">
-                <li>Svjatoslav Agejenko</li>
-                <li>Homepage: <a href="http://svjatoslav.eu/">http://svjatoslav.eu/</a></li>
-                <li>Email: <a href="mailto://svjatoslav@svjatoslav.eu/">mailto://svjatoslav@svjatoslav.eu/</a></li>
-            </ul>
-        </li>
+<li>Nicely captures apparent <a href="#org6e89e58">properties of the brain</a>.</li>
 
-        <li><a href="http://svjatoslav.eu/programs.jsp">other applications hosted at svjatoslav.eu</a></li>
-    </ul>
+<li>Naturally supports distributed and parallel <a href="#orga5de57b">geometrical data storage
+and computation.</a></li>
 
+<li>Dedicated hardware like <a href="#org75acc06">CM-1</a> can be built around hypercube concept
+that results in data, computation process and hardware, all
+beautifully fitting together while complementing each other
+strengths.</li>
 
-    <div id="outline-container-orgheadline1" class="outline-2">
-        <h2 id="orgheadline1"><span class="section-number-2">1</span> Current status</h2>
-        <div class="outline-text-2" id="text-1">
-            <ul class="org-ul">
-                <li>Implemented very simple persistent key-value map.</li>
-            </ul>
+<li>Hypercube stored data (and computation process) has geometry by its
+nature and should fit nicely with "3D first" user interface ideology
+of the parent <a href="http://www2.svjatoslav.eu/gitbrowse/sixth/doc/index.html">Sixth</a> project.</li>
+</ul>
+</div>
+</div>
+<div id="outline-container-orga5de57b" class="outline-2">
+<h2 id="orga5de57b"><span class="section-number-2">5.</span> Geometrical computation idea</h2>
+<div class="outline-text-2" id="text-5">
+</div>
+<div id="outline-container-org7c36ce8" class="outline-3">
+<h3 id="org7c36ce8"><span class="section-number-3">5.1.</span> Distributed computation and data storage</h3>
+<div class="outline-text-3" id="text-5-1">
+<p>
+Lots of problems can be translated to geometry (use any shapes and as
+many dimensions as you need). Solution(s) to such problems could be
+then found via geometrical search/comparison/lookup results. As a
+bonus, such geometrical <b>data storage</b> AND <b>computation</b> can be
+naturally made in <b>parallel</b> and <b>distributed</b>.
+</p>
+
+<p>
+Learning means building/updating/re-balancing the model (the hard
+part). Question answering is making (relatively simple) lookups
+(geometrical queries) against the model.
+</p>
+</div>
+</div>
+<div id="outline-container-orgb3e5e90" class="outline-3">
+<h3 id="orgb3e5e90"><span class="section-number-3">5.2.</span> Mapping hypercube to object-oriented model and relational database</h3>
+<div class="outline-text-3" id="text-5-2">
+<p>
+Object oriented programming is inspired by the way human mind
+operates. It allows programmer to express ideas to computer in a more
+human-like terms.
+</p>
+
+<p>
+It is actually also possible to map object model and relational
+database to geometrical hyperspace:
+</p>
+
+<ul class="org-ul">
+<li>Object or database table row is a point in hypercube arbitrary
+dimensional space. Each object member variable or database table
+column can be mapped to its own dimension in hypercube. That is: if
+class declares 4 variables for an object, then corresponding object
+can be stored as a single point inside 4 dimensional
+hypercube. Variable values translate to point coordinates in that
+hypercube. That is: numbers and string can be translated to linear
+value that can be used as a coordinate along particular dimension.</li>
+
+<li>Each object class or database table declares its own hypercube that
+contain instances (objects) of that class or rows of a table.</li>
+</ul>
+</div>
+</div>
 
-            <p>
-                Long term goal is to implement more advanced features on top of this.
-            </p>
-        </div>
-    </div>
+<div id="outline-container-orgad3411a" class="outline-3">
+<h3 id="orgad3411a"><span class="section-number-3">5.3.</span> Mapping entity relations in hypercube</h3>
+<div class="outline-text-3" id="text-5-3">
+<p>
+Consider we want to create database of:
+</p>
+<ul class="org-ul">
+<li>Books.</li>
+<li>Authors.</li>
+<li>Effort: Amount of time contributed by every author to every book
+that he/she wrote.</li>
+</ul>
+
+<p>
+Information above can be represented as 3D cube where dimensions are:
+</p>
+<ul class="org-ul">
+<li>X: Book</li>
+<li>Y: Author</li>
+<li>Z: Effort</li>
+</ul>
+
+<p>
+Points in that cube would nicely capture many to many relations
+between authors and the books.
+</p>
+</div>
+</div>
+</div>
+<div id="outline-container-orge747c35" class="outline-2">
+<h2 id="orge747c35"><span class="section-number-2">6.</span> Current status</h2>
+<div class="outline-text-2" id="text-6">
+<ul class="org-ul">
+<li>More or less defined <a href="#orga6ad9b1">Vision / goal</a>.</li>
+
+<li>Collected some <a href="#org923cf0c">inspiring</a> <a href="#orga5de57b">ideas</a>.</li>
+
+<li>Implemented very simple persistent key-value map.
+<ul class="org-ul">
+<li>Long term goal is to use it as a backing storage engine and
+implement more advanced features on top of this via layered
+architecture.</li>
+</ul></li>
+</ul>
+</div>
+</div>
 </div>
 <div id="postamble" class="status">
-    <p class="author">Author: Svjatoslav Agejenko</p>
-    <p class="date">Created: 2016-08-03 Wed 23:45</p>
-    <p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
+<p class="author">Author: Svjatoslav Agejenko</p>
+<p class="date">Created: 2022-10-30 Sun 12:09</p>
+<p class="validation"><a href="https://validator.w3.org/check?uri=referer">Validate</a></p>
 </div>
 </body>
 </html>