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Sowa.html
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<title>Sowa</title>
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<meta name="generated" content="2013-07-17 12:22:48 EDT"/>
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<div id="content">
<h1 class="title">Sowa</h1>
<div id="table-of-contents">
<h2>Table of Contents</h2>
<div id="text-table-of-contents">
<ul>
<li><a href="#sec-1">1 Sowa.org </a>
<ul>
<li><a href="#sec-1.1">1.1 Summary of Notations </a>
<ul>
<li><a href="#sec-1.1.1">1.1.1 Predicate Calculus </a></li>
<li><a href="#sec-1.1.2">1.1.2 Conceptual Graphs </a></li>
<li><a href="#sec-1.1.3">1.1.3 Knowledge Interchange Format </a></li>
</ul>
</li>
<li><a href="#sec-1.2">1.2 Ontology </a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="outline-container-1" class="outline-2">
<h2 id="sec-1"><span class="section-number-2">1</span> Sowa.org </h2>
<div class="outline-text-2" id="text-1">
<p>For decades, John Sowa has been one of the leading lights
in the discipline of Knowledge Representation. This document
collects notes on his work.
</p>
</div>
<div id="outline-container-1.1" class="outline-3">
<h3 id="sec-1.1"><span class="section-number-3">1.1</span> Summary of Notations </h3>
<div class="outline-text-3" id="text-1.1">
</div>
<div id="outline-container-1.1.1" class="outline-4">
<h4 id="sec-1.1.1"><span class="section-number-4">1.1.1</span> Predicate Calculus </h4>
<div class="outline-text-4" id="text-1.1.1">
<p>Symbolic logic has two main branches: <i>propositional logic</i> and <i>predicate logic</i>.
</p>
<p>
Propositional logic treats propositions as single units.
(<i>p</i> -> "Trailer trucks have 18 wheels.")
</p>
<p>
Predicate logic analyzes propositions into combinations of predicates.
(<i>trailerTruck(x)</i> and <i>wheel(x)</i> are examples of predicates)
</p>
<p>
A <i>predicate</i> or <i>relation</i> is a function that maps its arguments
to the <i>truth values</i> 1/0 or T/F.
</p>
<p>
<i>Less than</i> (<) is a good example of a predicate.
</p>
<pre class="example">(< 5 12) => T
(< 12 5) => F
</pre>
</div>
</div>
<div id="outline-container-1.1.2" class="outline-4">
<h4 id="sec-1.1.2"><span class="section-number-4">1.1.2</span> Conceptual Graphs </h4>
<div class="outline-text-4" id="text-1.1.2">
</div>
</div>
<div id="outline-container-1.1.3" class="outline-4">
<h4 id="sec-1.1.3"><span class="section-number-4">1.1.3</span> Knowledge Interchange Format </h4>
<div class="outline-text-4" id="text-1.1.3">
</div>
</div>
</div>
<div id="outline-container-1.2" class="outline-3">
<h3 id="sec-1.2"><span class="section-number-3">1.2</span> Ontology </h3>
<div class="outline-text-3" id="text-1.2">
<p>Sowa's Ontology is described in detail in his book
<i>Knowledge Representation</i>. Page 72 presents the
top three distinctions in lattice form.
</p>
<p>
The three distinctions are:
</p><ul>
<li>
I/R/M (Independent/Relative/Mediating)
</li>
<li>
P/A (Physical/Abstract)
</li>
<li>
C/O (Continuant/Occurrent)
</li>
</ul>
<p>Combinations of distinctions:
</p><ul>
<li>
IP (Actuality)
</li>
<li>
IA (Form)
</li>
<li>
RP (Prehension)
</li>
<li>
RA (Proposition)
</li>
<li>
MP (Nexus)
</li>
<li>
MA (Intention)
</li>
</ul>
<p>Three letter concepts
</p><ul>
<li>
IPC (Object)
</li>
<li>
IPO (Process)
</li>
<li>
IAC (Schema)
</li>
<li>
IAO (Script)
</li>
<li>
RPC (Juncture)
</li>
<li>
RPO (Participation)
</li>
<li>
RAC (Description)
</li>
<li>
RAO (History)
</li>
<li>
MPC (Structure)
</li>
<li>
MPO (Situation)
</li>
<li>
MAC (Reason)
</li>
<li>
MAO (Purpose)
</li>
</ul>
<p>The purpose of the ontology is to provide a framework
of distinctions that can be used to discriminate and
classify the things that exist and define the words
that describe them.
</p>
<p>
But no fixed collection of distinctions or categories
is likely to be adequate for describing all things
for all time.
</p></div>
</div>
</div>
<div id="postamble">
<p class="author"> Author: Greg
<a href="mailto:greg@greg-Satellite-C855D"><greg@greg-Satellite-C855D></a>
</p>
<p class="date"> Date: 2013-07-17 12:22:48 EDT</p>
<p class="creator">HTML generated by org-mode 6.33x in emacs 23</p>
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