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[sixth-data.git] / doc / index.html
diff --git a/doc/index.html b/doc/index.html
index c719c14..e7a0008 100644 (file)
--- a/doc/index.html
+++ b/doc/index.html
@@ -1,15 +1,15 @@
 <!doctype html>
 <html lang="en">
 <head>
 <!doctype html>
 <html lang="en">
 <head>
-<title>Sixth - system for data storage, computation, exploration and interaction</title>
-<!-- 2017-07-29 Sat 13:31 -->
+<title>Sixth Data - Data storage and computing engine</title>
+<!-- 2019-09-22 Sun 11:57 -->
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <meta name="generator" content="Org-mode">
 <meta name="author" content="Svjatoslav Agejenko">
 <meta charset="utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <meta name="generator" content="Org-mode">
 <meta name="author" content="Svjatoslav Agejenko">
-<link href="https://bootswatch.com/darkly/bootstrap.min.css" rel="stylesheet">
-<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
-<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.1/js/bootstrap.min.js"></script>"
+<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 type="text/css">
 footer {background-color: #111 !important;}
 pre {background-color: #111; color: #ccc;}
@@ -195,39 +195,64 @@ $(function() {
 </head>
 <body>
 <div id="content" class="container">
 </head>
 <body>
 <div id="content" class="container">
-<div class="row"><div class="col-md-9"><h1 class="title">Sixth - system for data storage, computation, exploration and interaction</h1>
-<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>
+<div class="row"><div class="col-md-9"><h1 class="title">Sixth Data - Data storage and computing engine</h1>
 
 
-<li><a href="http://www2.svjatoslav.eu/gitweb/?p=sixth-data.git;a=snapshot;h=HEAD;sf=tgz">download latest snapshot</a>
+<div id="outline-container-sec-1" class="outline-2">
+<h2 id="sec-1"><span class="section-number-2">1</span> General</h2>
+<div class="outline-text-2" id="text-1">
+<ul class="org-ul">
+<li>This is a subproject of <a href="https://www3.svjatoslav.eu/projects/sixth/">Sixth</a>
 </li>
 
 </li>
 
-<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>This program is free software: you can redistribute it and/or modify
+it under the terms of the <a href="https://www.gnu.org/licenses/lgpl.html">GNU Lesser General Public License</a> as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
 </li>
 
 <li>Program author:
 <ul class="org-ul">
 <li>Svjatoslav Agejenko
 </li>
 </li>
 
 <li>Program author:
 <ul class="org-ul">
 <li>Svjatoslav Agejenko
 </li>
-<li>Homepage: <a href="http://svjatoslav.eu">http://svjatoslav.eu</a>
+<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>
 <li>Email: <a href="mailto://svjatoslav@svjatoslav.eu">mailto://svjatoslav@svjatoslav.eu</a>
 </li>
 </ul>
 </li>
 
-<li><a href="http://www.svjatoslav.eu/programs.jsp">other applications hosted at svjatoslav.eu</a>
+<li><a href="https://www.svjatoslav.eu/projects/">Other software projects hosted at svjatoslav.eu</a>
 </li>
 </ul>
 </li>
 </ul>
+</div>
 
 
+<div id="outline-container-sec-1-1" class="outline-3">
+<h3 id="sec-1-1"><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>
 
 
-<div id="outline-container-sec-1" class="outline-2">
-<h2 id="sec-1"><a id="ID-f6764282-a6f6-44e6-8716-b428074dd093" name="ID-f6764282-a6f6-44e6-8716-b428074dd093"></a><span class="section-number-2">1</span> Vision / goal</h2>
-<div class="outline-text-2" id="text-1">
+<li><a href="https://www2.svjatoslav.eu/gitweb/?p=sixth-data.git;a=summary">Browse Git repository online</a>
+</li>
+
+<li>Clone Git repository using command:
+<pre class="example">
+git clone https://www2.svjatoslav.eu/git/sixth-data.git
+
+</pre>
+</li>
+
+<li>See <a href="https://www3.svjatoslav.eu/projects/sixth-data/apidocs/">JavaDoc</a>.
+</li>
+</ul>
+</div>
+</div>
+</div>
+
+<div id="outline-container-sec-2" class="outline-2">
+<h2 id="sec-2"><a id="ID-f6764282-a6f6-44e6-8716-b428074dd093" name="ID-f6764282-a6f6-44e6-8716-b428074dd093"></a><span class="section-number-2">2</span> Vision / goal</h2>
+<div class="outline-text-2" id="text-2">
 <p>
 Provide versioned, clustered, flexible, distributed, multi-dimensional
 data storage engine for the <a href="http://www2.svjatoslav.eu/gitbrowse/sixth/doc/index.html">Sixth computation engine</a>.
 <p>
 Provide versioned, clustered, flexible, distributed, multi-dimensional
 data storage engine for the <a href="http://www2.svjatoslav.eu/gitbrowse/sixth/doc/index.html">Sixth computation engine</a>.
@@ -236,35 +261,33 @@ data storage engine for the <a href="http://www2.svjatoslav.eu/gitbrowse/sixth/d
 <ul class="org-ul">
 <li>Speaking of traditional relational database and object oriented
 business applications:
 <ul class="org-ul">
 <li>Speaking of traditional relational database and object oriented
 business applications:
+
 <ul class="org-ul">
 <li>I hate object-relational impedance mismatch.
 </li>
 
 <li>I don't like to convert data between persistent database and
 <ul class="org-ul">
 <li>I hate object-relational impedance mismatch.
 </li>
 
 <li>I don't like to convert data between persistent database and
-</li>
-</ul>
-<p>
 runtime objects for every transaction. How about creating united
 database/computation engine instead to:
 runtime objects for every transaction. How about creating united
 database/computation engine instead to:
-</p>
-<ul class="org-ul">
-<li>Eliminate constant moving and converting of data between 2 systems.
 </li>
 </li>
-<li>Abstract away difference between RAM VS persistent storage. Let
+
+<li>Eliminate constant moving and converting of data between 2 systems
+and make computing happen close to where the data is stored.
 </li>
 </li>
-</ul>
-<p>
+
+<li>Abstract away difference between RAM VS persistent storage. Let
 the system decide at runtime which data to keep in what kind of
 memory.
 the system decide at runtime which data to keep in what kind of
 memory.
-</p>
+</li>
+</ul>
 </li>
 </ul>
 </div>
 </div>
 
 </li>
 </ul>
 </div>
 </div>
 
-<div id="outline-container-sec-2" class="outline-2">
-<h2 id="sec-2"><span class="section-number-2">2</span> Inspiration</h2>
-<div class="outline-text-2" id="text-2">
+<div id="outline-container-sec-3" class="outline-2">
+<h2 id="sec-3"><span class="section-number-2">3</span> Inspiration</h2>
+<div class="outline-text-2" id="text-3">
 <ul class="org-ul">
 <li>Relational databases:
 <ul class="org-ul">
 <ul class="org-ul">
 <li>Relational databases:
 <ul class="org-ul">
@@ -293,39 +316,76 @@ memory.
 </ul>
 </div>
 
 </ul>
 </div>
 
-<div id="outline-container-sec-2-1" class="outline-3">
-<h3 id="sec-2-1"><a id="ID-d2375acc-af14-4f18-8ad0-7949501178c5" name="ID-d2375acc-af14-4f18-8ad0-7949501178c5"></a><span class="section-number-3">2.1</span> Brain</h3>
-<div class="outline-text-3" id="text-2-1">
+<div id="outline-container-sec-3-1" class="outline-3">
+<h3 id="sec-3-1"><a id="ID-d2375acc-af14-4f18-8ad0-7949501178c5" name="ID-d2375acc-af14-4f18-8ad0-7949501178c5"></a><span class="section-number-3">3.1</span> Brain</h3>
+<div class="outline-text-3" id="text-3-1">
 <ul class="org-ul">
 <ul class="org-ul">
-<li>Appears to have more than 3D dimensional design. Food for
-thought&#x2026;)
+<li>Brain appears to have more than 3D dimensional design:
+<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>Brain appears to use geometry to map thoughts and even sounds:
 <ul class="org-ul">
 <ul class="org-ul">
-<li><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><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.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>
 </ul>
 </li>
 
-<li>It directly inspires following ideas
+<li>It directly inspires <a href="#sec-4-1">Geometrical computation</a> idea and nicely fits
+with <a href="#sec-3-2">CM-1 Connection Machine</a> design.
+</li>
+</ul>
+</div>
+</div>
+
+<div id="outline-container-sec-3-2" class="outline-3">
+<h3 id="sec-3-2"><a id="ID-01aa65c1-3d44-44a8-9b90-58454bc6be80" name="ID-01aa65c1-3d44-44a8-9b90-58454bc6be80"></a><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>
+
 <ul class="org-ul">
 <ul class="org-ul">
-<li><a href="#sec-3-1">Distributed comutation and data storage</a>
+<li>see: <a href="#sec-4-1">Geometrical computation</a>
 </li>
 </li>
-<li><a href="#sec-3-2">Mapping of hyperspace to traditional object-oriented model</a>
+
+<li>Computation unit has local CPU and RAM.
 </li>
 </li>
-<li><a href="#sec-3-3">Handling of relations</a>
+
+<li>Data is pre-distributed across computation units.
 </li>
 </li>
-</ul>
+
+<li>Machine's internal 12-dimensional hypercube network allows to
+efficiently simulate arbitrary dimensional 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>
 </li>
 </ul>
 </div>
 </div>
 </div>
 
 </li>
 </ul>
 </div>
 </div>
 </div>
 
-<div id="outline-container-sec-3" class="outline-2">
-<h2 id="sec-3"><span class="section-number-2">3</span> Ideas</h2>
-<div class="outline-text-2" id="text-3">
-</div><div id="outline-container-sec-3-1" class="outline-3">
-<h3 id="sec-3-1"><a id="ID-5d287158-53ea-44a2-a754-dd862366066a" name="ID-5d287158-53ea-44a2-a754-dd862366066a"></a><span class="section-number-3">3.1</span> Distributed computation and data storage</h3>
-<div class="outline-text-3" id="text-3-1">
+<div id="outline-container-sec-4" class="outline-2">
+<h2 id="sec-4"><span class="section-number-2">4</span> Ideas</h2>
+<div class="outline-text-2" id="text-4">
+</div><div id="outline-container-sec-4-1" class="outline-3">
+<h3 id="sec-4-1"><a id="ID-171fe375-c737-41e6-b429-a414f6abc5d8" name="ID-171fe375-c737-41e6-b429-a414f6abc5d8"></a><span class="section-number-3">4.1</span> Geometrical computation</h3>
+<div class="outline-text-3" id="text-4-1">
+<ul class="org-ul">
+<li>Inspired by <a href="#sec-3-1">Brain</a>.
+</li>
+<li>Wits nicely with <a href="#sec-3-2">CM-1 Connection Machine</a> properties.
+</li>
+</ul>
+</div>
+
+<div id="outline-container-sec-4-1-1" class="outline-4">
+<h4 id="sec-4-1-1"><a id="ID-5d287158-53ea-44a2-a754-dd862366066a" name="ID-5d287158-53ea-44a2-a754-dd862366066a"></a><span class="section-number-4">4.1.1</span> Distributed computation and data storage</h4>
+<div class="outline-text-4" id="text-4-1-1">
 <p>
 Maybe every problem can be translated to geometry (use any shapes and
 as many dimensions as you need). Solution(s) to such problems would
 <p>
 Maybe every problem can be translated to geometry (use any shapes and
 as many dimensions as you need). Solution(s) to such problems would
@@ -338,9 +398,9 @@ simple) lookups (geometrical queries) against the model.
 </p>
 </div>
 </div>
 </p>
 </div>
 </div>
-<div id="outline-container-sec-3-2" class="outline-3">
-<h3 id="sec-3-2"><a id="ID-a117c11e-97c1-4822-88b2-9fc10f96caec" name="ID-a117c11e-97c1-4822-88b2-9fc10f96caec"></a><span class="section-number-3">3.2</span> Mapping of hyperspace to traditional object-oriented model</h3>
-<div class="outline-text-3" id="text-3-2">
+<div id="outline-container-sec-4-1-2" class="outline-4">
+<h4 id="sec-4-1-2"><a id="ID-a117c11e-97c1-4822-88b2-9fc10f96caec" name="ID-a117c11e-97c1-4822-88b2-9fc10f96caec"></a><span class="section-number-4">4.1.2</span> Mapping of hyperspace to traditional object-oriented model</h4>
+<div class="outline-text-4" id="text-4-1-2">
 <p>
 Object oriented programming is inspired by the way human mind
 operates. It allows programmer to express ideas to computer in a more
 <p>
 Object oriented programming is inspired by the way human mind
 operates. It allows programmer to express ideas to computer in a more
@@ -369,9 +429,9 @@ different universes.
 </ul>
 </div>
 </div>
 </ul>
 </div>
 </div>
-<div id="outline-container-sec-3-3" class="outline-3">
-<h3 id="sec-3-3"><a id="ID-b6b15bd2-c78b-4c51-a343-72843a515c29" name="ID-b6b15bd2-c78b-4c51-a343-72843a515c29"></a><span class="section-number-3">3.3</span> Handling of relations</h3>
-<div class="outline-text-3" id="text-3-3">
+<div id="outline-container-sec-4-1-3" class="outline-4">
+<h4 id="sec-4-1-3"><a id="ID-b6b15bd2-c78b-4c51-a343-72843a515c29" name="ID-b6b15bd2-c78b-4c51-a343-72843a515c29"></a><span class="section-number-4">4.1.3</span> Handling of relations</h4>
+<div class="outline-text-4" id="text-4-1-3">
 <p>
 Consider we want to create database of books and authors. Book can
 have multiple authors, and single person can be author for multiple
 <p>
 Consider we want to create database of books and authors. Book can
 have multiple authors, and single person can be author for multiple
@@ -417,15 +477,45 @@ amount of work contributed for book by given author (point).
 </div>
 </div>
 
 </div>
 </div>
 
-
-<div id="outline-container-sec-4" class="outline-2">
-<h2 id="sec-4"><span class="section-number-2">4</span> Current status</h2>
-<div class="outline-text-2" id="text-4">
+<div id="outline-container-sec-4-2" class="outline-3">
+<h3 id="sec-4-2"><span class="section-number-3">4.2</span> Layered architecture</h3>
+<div class="outline-text-3" id="text-4-2">
+<dl class="org-dl">
+<dt> layer 1 </dt><dd>disk / block storage / partition
+</dd>
+
+<dt> layer 2 </dt><dd>key/value storage. Keys are unique and are dictated by
+storage engine. Value is arbitrary but limited size byte
+array. This layer is responsible for handling disk
+defragmentation and consistency in case of crash
+recovery.
+</dd>
+
+<dt> layer 3 </dt><dd>key/value storage. Keys are content hashes. Values are
+arbitrary but limited size content byte arrays. This
+layer effectively implements content addressable
+storage. Content addressible storage enables GIT-like
+behavior (possibility for competing branches, retaining
+history, transparent deduplication)
+</dd>
+
+<dt> layer 4 </dt><dd>Implements arbitrary dimensional multiverse.
+</dd>
+
+<dt> layer 5 </dt><dd>Distributed computation engine.
+</dd>
+</dl>
+</div>
+</div>
+</div>
+<div id="outline-container-sec-5" class="outline-2">
+<h2 id="sec-5"><span class="section-number-2">5</span> Current status</h2>
+<div class="outline-text-2" id="text-5">
 <ul class="org-ul">
 <ul class="org-ul">
-<li>More or less defined <a href="#sec-1">Vision / goal</a>.
+<li>More or less defined <a href="#sec-2">Vision / goal</a>.
 </li>
 
 </li>
 
-<li>Collected some <a href="#sec-2-1">ideas</a>.
+<li>Collected some <a href="#sec-3-1">ideas</a>.
 </li>
 
 <li>Implemented very simple persistent key-value map.
 </li>
 
 <li>Implemented very simple persistent key-value map.
@@ -439,40 +529,54 @@ implement more advanced features on top of this.
 </div>
 </div>
 
 </div>
 </div>
 
-<div id="outline-container-sec-5" class="outline-2">
-<h2 id="sec-5"><span class="section-number-2">5</span> See also</h2>
-<div class="outline-text-2" id="text-5">
+<div id="outline-container-sec-6" class="outline-2">
+<h2 id="sec-6"><span class="section-number-2">6</span> See also</h2>
+<div class="outline-text-2" id="text-6">
 <p>
 Interesting or competing projects with good ideas:
 </p>
 
 <ul class="org-ul">
 <p>
 Interesting or competing projects with good ideas:
 </p>
 
 <ul class="org-ul">
-<li>GRAKN.AI: database in the form of a knowledge graph that uses
-machine reasoning to simplify data processing challenges for AI
-applications.
+<li><a href="#sec-3-2">CM-1 Connection Machine</a>
+</li>
+
+<li>GRAKN.AI
 <ul class="org-ul">
 <ul class="org-ul">
-<li><a href="https://grakn.ai/">https://grakn.ai/</a>
+<li>database in the form of a knowledge graph that uses machine
+reasoning to simplify data processing challenges for AI
+applications. <a href="https://grakn.ai/">https://grakn.ai/</a>
 </li>
 </ul>
 </li>
 
 </li>
 </ul>
 </li>
 
-<li>Gemstone/S based on Smalltalk.
+<li><a href="http://wiki.squeak.org/squeak/2665">Magma</a>
 <ul class="org-ul">
 <ul class="org-ul">
-<li><a href="http://esug.org/data/ESUG2015/3%20wednesday/1100-1130%20SQL%20Queries%20on%20Smalltalk%20Objects/SQL%20Queries%20in%20Smalltalk%20(James%20Foster)">http://esug.org/data/ESUG2015/3%20wednesday/1100-1130%20SQL%20Queries%20on%20Smalltalk%20Objects/SQL%20Queries%20in%20Smalltalk%20(James%20Foster)</a>.pdf
+<li>Multi-user object database for Squeak
 </li>
 </ul>
 </li>
 
 </li>
 </ul>
 </li>
 
-<li>Magma distributed database in Smalltalk.
+<li><a href="http://esug.org/data/ESUG2015/3%20wednesday/1100-1130%20SQL%20Queries%20on%20Smalltalk%20Objects/SQL%20Queries%20in%20Smalltalk%20(James%20Foster).pdf">Gemstone/S</a>
 <ul class="org-ul">
 <ul class="org-ul">
-<li><a href="http://wiki.squeak.org/squeak/2665">http://wiki.squeak.org/squeak/2665</a>
+<li>Completely distributed smalltalk based computing
+system.
 </li>
 </ul>
 </li>
 
 </li>
 </ul>
 </li>
 
-<li>ZetaVM
+<li><a href="http://www.uruk.org/emu/Taos.html">TAOS</a>
 <ul class="org-ul">
 <ul class="org-ul">
-<li><a href="https://github.com/zetavm/zetavm">https://github.com/zetavm/zetavm</a>
+<li>Completely distributed operating system/virtual machine:
+</li>
+</ul>
+</li>
+
+<li><a href="https://github.com/vygr/ChrysaLisp">ChrysaLisp</a>
+<ul class="org-ul">
+<li>Assembler/C-Script/Lisp 64 bit, MIMD, multi CPU, multi threaded,
+multi core, multi user Parallel OS. With GUI, Terminal, OO
+Assembler, Class libraries, C-Script compiler, Lisp interpreter,
+Debugger, and more&#x2026;
 </li>
 </ul>
 </li>
 </li>
 </ul>
 </li>
@@ -482,29 +586,34 @@ applications.
 </div><div class="col-md-3"><nav id="table-of-contents">
 <div id="text-table-of-contents" class="bs-docs-sidebar">
 <ul class="nav">
 </div><div class="col-md-3"><nav id="table-of-contents">
 <div id="text-table-of-contents" class="bs-docs-sidebar">
 <ul class="nav">
-<li><a href="#sec-1">1. Vision / goal</a></li>
-<li><a href="#sec-2">2. Inspiration</a>
+<li><a href="#sec-1">1. General</a>
+<ul class="nav">
+<li><a href="#sec-1-1">1.1. Source code</a></li>
+</ul>
+</li>
+<li><a href="#sec-2">2. Vision / goal</a></li>
+<li><a href="#sec-3">3. Inspiration</a>
 <ul class="nav">
 <ul class="nav">
-<li><a href="#sec-2-1">2.1. Brain</a></li>
+<li><a href="#sec-3-1">3.1. Brain</a></li>
+<li><a href="#sec-3-2">3.2. CM-1 Connection Machine</a></li>
 </ul>
 </li>
 </ul>
 </li>
-<li><a href="#sec-3">3. Ideas</a>
+<li><a href="#sec-4">4. Ideas</a>
 <ul class="nav">
 <ul class="nav">
-<li><a href="#sec-3-1">3.1. Distributed computation and data storage</a></li>
-<li><a href="#sec-3-2">3.2. Mapping of hyperspace to traditional object-oriented model</a></li>
-<li><a href="#sec-3-3">3.3. Handling of relations</a></li>
+<li><a href="#sec-4-1">4.1. Geometrical computation</a></li>
+<li><a href="#sec-4-2">4.2. Layered architecture</a></li>
 </ul>
 </li>
 </ul>
 </li>
-<li><a href="#sec-4">4. Current status</a></li>
-<li><a href="#sec-5">5. See also</a></li>
+<li><a href="#sec-5">5. Current status</a></li>
+<li><a href="#sec-6">6. See also</a></li>
 </ul>
 </div>
 </nav>
 </div></div></div>
 <footer id="postamble" class="">
 <div><p class="author">Author: Svjatoslav Agejenko</p>
 </ul>
 </div>
 </nav>
 </div></div></div>
 <footer id="postamble" class="">
 <div><p class="author">Author: Svjatoslav Agejenko</p>
-<p class="date">Created: 2017-07-29 Sat 13:31</p>
-<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 25.1.1 (<a href="http://orgmode.org">Org-mode</a> 8.2.10)</p>
+<p class="date">Created: 2019-09-22 Sun 11:57</p>
+<p class="creator"><a href="http://www.gnu.org/software/emacs/">Emacs</a> 26.1 (<a href="http://orgmode.org">Org-mode</a> 9.1.9)</p>
 </div>
 </footer>
 </body>
 </div>
 </footer>
 </body>
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