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<h1><a name="ST" />
OWL Web Ontology Language <br /> Semantics and Abstract Syntax </h1>

<h2><a name="SW" />

W3C Recommendation 10 February 2004
</h2>

      <div id="owl_2_notice" style="border: solid black 1px; padding: 0.5em; background: #FFB;">

	<p style="margin-top: 0; font-weight: bold;">New Version
        Available: OWL 2 <span style="padding-left: 2em;"></span>
        (Document Status Update, 12 November 2009)</p>

	<p style="margin-bottom: 0;">The OWL Working Group has produced
	a W3C Recommendation for a new version of OWL which adds
	features to this 2004 version, while remaining compatible.
	Please see <a href="http://www.w3.org/TR/owl2-overview">OWL 2
	Document Overview</a> for an introduction to OWL 2 and a guide
	to the OWL 2 document set.</p>

      </div>


<dl>

<dt>This version:</dt>
<dd>
<a href="http://www.w3.org/TR/2004/REC-owl-semantics-20040210/">http://www.w3.org/TR/2004/REC-owl-semantics-20040210/</a>
</dd>

<dt>Latest version:</dt>
<dd>
<a href="http://www.w3.org/TR/owl-semantics/">http://www.w3.org/TR/owl-semantics/</a>
</dd>

<dt>Previous version:</dt>
<dd>
<a href="http://www.w3.org/TR/2003/PR-owl-semantics-20031215/">http://www.w3.org/TR/2003/PR-owl-semantics-20031215/</a>
</dd>

<dt>Editors:</dt>  
<dd>
<a href="http://www-db.research.bell-labs.com/user/pfps/">Peter F. Patel-Schneider</a>,
	Bell Labs Research, Lucent Technologies<br />
<a href="http://www.coginst.uwf.edu/~phayes/">Patrick Hayes</a>,
	IHMC, University of West Florida<br />
<a href="http://www.cs.man.ac.uk/~horrocks/">Ian Horrocks</a>,
	Department of Computer Science, University of Manchester<br />
</dd>
</dl>


<p>Please refer to the <a
href="http://www.w3.org/2001/sw/WebOnt/errata#owl-semantics"><strong>errata</strong></a>
for this document, which may include some normative corrections.</p>

<p>
This document is also available in this non-normative form: <a href="semantics-all.html">single HTML file</a>.
</p>

<p>See also <a href="http://www.w3.org/2001/sw/RDFCore/translation/owl-semantics">translations</a>.</p>

<p class="copyright">
<a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">
Copyright</a> © 2004 <a href="http://www.w3.org/">
<acronym title="World Wide Web Consortium">W3C</acronym></a><sup>®</sup>
(<a href="http://www.csail.mit.edu/"><acronym title="Massachusetts Institute of Technology">MIT</acronym></a>, <a
href="http://www.ercim.org/"><acronym title="European Research
Consortium for Informatics and Mathematics">ERCIM</acronym></a>, <a
href="http://www.keio.ac.jp/">Keio</a>), All Rights Reserved. W3C <a
href="http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">
liability</a>,
<a href="http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">
trademark</a>,
<a href="http://www.w3.org/Consortium/Legal/copyright-documents">document
use</a> and 
<a href="http://www.w3.org/Consortium/Legal/copyright-software">software
licensing</a> rules apply.
</p>  


<hr />

</div>

<h2><a id="abstract" name="abstract">Abstract</a></h2>

<div class="abstract">
<p>
This description of OWL, the Web Ontology Language 
being designed by the W3C Web Ontology Working Group,
contains a high-level abstract syntax for both OWL DL and OWL Lite, 
sublanguages of OWL.
A model-theoretic semantics is given to provide a formal meaning for OWL
ontologies written in this abstract syntax. 
A model-theoretic semantics in the form of an extension to the RDF
semantics is also given to provide a formal meaning for OWL ontologies 
as RDF graphs (OWL Full).
A mapping from the abstract syntax to RDF graphs is given and
the two model theories are shown to have the same consequences on
OWL ontologies that can be written in the abstract syntax. 
</p>
</div>

<div class="status">
<h2><a id="status" name="status"></a>Status of this document</h2>

<!-- Start Status-Of-This-Document Text -->

<p>This document has been reviewed by W3C Members and other interested
parties, and it has been endorsed by the Director as a <a
href="http://www.w3.org/2003/06/Process-20030618/tr.html#RecsW3C">W3C
Recommendation</a>.  W3C's role in making the Recommendation is to
draw attention to the specification and to promote its widespread
deployment. This enhances the functionality and interoperability of
the Web.</p>

<p>This is one of <a
href="http://www.w3.org/TR/2004/REC-owl-features-20040210/#s1.1">six
parts</a> of the W3C Recommendation for OWL, the Web Ontology
Language.  It has been developed by the <a
href="http://www.w3.org/2001/sw/WebOnt/">Web Ontology Working
Group</a> as part of the <a href="http://www.w3.org/2001/sw/">W3C
Semantic Web Activity</a> (<a
href="http://www.w3.org/2001/sw/Activity">Activity Statement</a>, <a
href="http://www.w3.org/2001/sw/WebOnt/charter">Group Charter</a>) for
publication on 10 February 2004.  </p>

<p>The design of OWL expressed in earlier versions of these documents
has been widely reviewed and satisfies the Working Group's <a
href="http://www.w3.org/TR/webont-req/"> technical requirements</a>.
The Working Group has addressed <a
href="http://lists.w3.org/Archives/Public/public-webont-comments/">
all comments received</a>, making changes as necessary.  Changes to
this document since <a
href="http://www.w3.org/TR/2003/PR-owl-semantics-20031215/">the Proposed
Recommendation version</a> are detailed in the <a
href="./#changes-since-PR">change log</a>.</p>

<p>Comments are welcome at <a
href="mailto:public-webont-comments@w3.org">public-webont-comments@w3.org</a>
(<a
href="http://lists.w3.org/Archives/Public/public-webont-comments/">archive</a>)
and general discussion of related technology is welcome at <a
href="mailto:www-rdf-logic@w3.org">www-rdf-logic@w3.org</a> (<a
href="http://lists.w3.org/Archives/Public/www-rdf-logic/"
shape="rect">archive</a>).
</p>

<p>A list of <a href="http://www.w3.org/2001/sw/WebOnt/impls">
implementations</a> is available.</p>

<p>The W3C maintains a list of <a
href="http://www.w3.org/2001/sw/WebOnt/discl" rel="disclosure">any
patent disclosures related to this work</a>.
</p>

<p><em>This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current W3C publications and the latest revision of this technical report can be found in the <a href="http://www.w3.org/TR/">W3C technical reports index</a> at http://www.w3.org/TR/.</em></p>

<!-- End Status-Of-This-Document Text -->

</div>

<hr />

<div class="toc">

<h2><a id="contents" name="contents">Table of contents</a></h2>

<ul class="toc">
<li class="tocline1">1. <a href="#1">Introduction</a> (Informative)
    </li>
<li class="tocline1">2. <a href="syntax.html">Abstract Syntax</a> (Normative)
    <ul class="toc">
    <li class="tocline2">2.1 <a href="syntax.html#2.1">Ontologies</a></li>
    <li class="tocline2">2.2 <a href="syntax.html#2.2">Facts</a></li>
    <li class="tocline2">2.3 <a href="syntax.html#2.3">Axioms</a>
      <ul class="toc">
	<li class="tocline3">2.3.1 <a href="syntax.html#2.3.1">OWL Lite Axioms</a>
            <ul class="toc">
		<li class="tocline4">2.3.1.1 <a href="syntax.html#2.3.1.1">OWL Lite Class Axioms</a></li>
	        <li class="tocline4">2.3.1.2 <a href="syntax.html#2.3.1.2">OWL Lite Restrictions</a></li>
	        <li class="tocline4">2.3.1.3 <a href="syntax.html#2.3.1.3">OWL Lite Property Axioms</a></li>
            </ul>
	</li>
        <li class="tocline3">2.3.2 <a href="syntax.html#2.3.2">OWL DL Axioms</a>
            <ul class="toc">
		<li class="tocline4">2.3.2.1 <a href="syntax.html#2.3.2.1">OWL DL Class Axioms</a></li>
	        <li class="tocline4">2.3.2.2 <a href="syntax.html#2.3.2.2">OWL DL Descriptions</a></li>
	        <li class="tocline4">2.3.2.3 <a href="syntax.html#2.3.2.3">OWL DL Restrictions</a></li>
	        <li class="tocline4">2.3.2.4 <a href="syntax.html#2.3.2.4">OWL DL Property Axioms</a></li>
            </ul>
	</li>
      </ul>
      </li>
    </ul>
    </li>
<li class="tocline1">3. <a href="direct.html">Direct Model-Theoretic Semantics</a> (Normative)
       <ul class="toc">
       <li class="tocline2">3.1 <a href="direct.html#3.1">Vocabularies and Interpretations</a></li>
       <li class="tocline2">3.2 <a href="direct.html#3.2">Interpreting Embedded Constructs</a></li>
       <li class="tocline2">3.3 <a href="direct.html#3.3">Interpreting Axioms and Facts</a></li>
       <li class="tocline2">3.4 <a href="direct.html#3.4">Interpreting Ontologies</a></li>
       </ul>
    </li>
<li class="tocline1">4. <a href="mapping.html">Mapping to RDF Graphs</a> (Normative)
       <ul class="toc">
       <li class="tocline2">4.1 <a href="mapping.html#4.1">Translation to RDF Graphs</a></li>
       <li class="tocline2">4.2 <a href="mapping.html#4.2">Definition of
	       OWL DL and OWL Lite Ontologies in RDF Graph Form</a></li>
       </ul>
    </li>
<li class="tocline1">5. <a href="rdfs.html">RDF-Compatible Model-Theoretic Semantics</a> (Normative)
       <ul class="toc">
	<li class="tocline2">5.1 <a href="rdfs.html#5.1">The OWL and RDF Universes</a></li>
	<li class="tocline2">5.2 <a href="rdfs.html#5.2">OWL Interpretations</a></li>
	<li class="tocline2">5.3 <a href="rdfs.html#5.3">OWL Full</a></li>
	<li class="tocline2">5.4 <a href="rdfs.html#5.4">OWL DL</a></li>
       </ul>
    </li>
</ul>

<ul class="toc">
<li class="tocline1">Appendix A. <a href="proofs.html">Proofs</a> (Informative)
  <ul class="toc">
    <li class="tocline2">A.1 <a href="proofs.html#A.1">Correspondence
		    between Abstract Syntax and OWL DL</a>
      <ul class="toc">
        <li class="tocline3">A.1.1 <a href="proofs.html#A.1.1">Correspondence for Descriptions</a></li>
        <li class="tocline3">A.1.2 <a href="proofs.html#A.1.2">Correspondence for Directives</a></li>
        <li class="tocline3">A.1.3 <a href="proofs.html#A.1.3">From RDF Semantics to Direct Semantics</a></li>
        <li class="tocline3">A.1.4 <a href="proofs.html#A.1.4">From Direct Semantics to RDF Semantics</a></li>
        <li class="tocline3">A.1.5 <a href="proofs.html#A.1.5">Correspondence Theorem</a></li>
      </ul>
    </li>
    <li class="tocline2">A.2 <a href="proofs.html#A.2">Correspondence
		    between OWL DL and OWL Full</a>
    </li>
  </ul>
</li>
<li class="tocline1">Appendix B. <a href="examples.html">Examples</a>
	 (Informative)
       <ul class="toc">
       <li class="tocline2">B.1 <a href="examples.html#B.1">Examples of
	       Mapping from Abstract Syntax to RDF Graphs</a></li>
       <li class="tocline2">B.2 <a href="examples.html#B.2">
		Examples of Entailments in OWL DL and OWL Full</a></li>
       </ul>
</li>
<li class="tocline1">Appendix C. <a href="#C">Changes since Last Call</a>
	(Informative)
       <ul class="toc">
       <li class="tocline2">C.1 <a href="#C.1">
		Substantive changes after Last Call</a></li> 
       <li class="tocline2">C.2 <a href="#C.2">
		Editorial changes after Last Call</a></li>
       <li class="tocline2">C.3 <a href="#C.3">
		Substantive changes after Candidate Recommendation</a></li>
       <li class="tocline2">C.4 <a href="#C.4">
		Editorial changes after Candidate Recommendation</a></li>
       <li class="tocline2">C.5 <a href="#changes-since-PR">
		Changes since Proposed Recommendation</a></li>
       </ul>
</li>
</ul>

<ul class="toc">
<li class="tocline1"><a href="#index">Index of Vocabulary</a> (Informative)</li>
<li class="tocline1"><a href="#acknowledgments">Acknowledgments</a> (Informative)</li>
<li class="tocline1"><a href="#references">References</a>
       <ul class="toc">
       <li class="tocline2"><a href="#references-normative">Normative
		  References</a></li> 
       <li class="tocline2"><a href="#references-other">Other
		  References</a></li> 
	</ul>
	</li>
</ul>

<hr />

</div>

<h2><a name="1"></a>1. Introduction (Informative)</h2>

<p>
<span class="editorialchange">
This document is one part of the specification of OWL, the Web Ontology
Language.  
The OWL Overview
[<cite><a href="#ref-overview">OWL Overview</a></cite>]
describes each of the different documents in the specification
and how they fit together.
</span>
</p>

<p>
This document
contains several interrelated normative
specifications of the several
styles of OWL, the Web Ontology Language being produced by the 
<a href="http://www.w3.org/2001/sw/WebOnt/">W3C Web Ontology Working Group
(WebOnt)</a>.
First, <a href="syntax.html#2">Section 2</a> contains
a high-level, abstract syntax for both
<a href="syntax.html#owl-lite">OWL Lite</a>, a subset of OWL,
and <a href="syntax.html#owl-dl">OWL DL</a>, a fuller style of using OWL
but one that still places some
limitations on how OWL ontologies are constructed.
Eliminating these limitations results in the full OWL language, called
<a href="rdfs.html#owl-full">OWL Full</a>, which has the same syntax
as RDF.
The normative exchange syntax for OWL is 
RDF/XML [<cite><a href="#ref-rdfsyntax">RDF Syntax</a></cite>];
the OWL Reference document
[<cite><a href="#ref-ref">OWL Reference</a></cite>]
shows how the RDF syntax is used in OWL.
A mapping from the OWL abstract syntax to 
<a href="http://www.w3.org/TR/2003/WD-rdf-concepts-20030123/#section-data-model">RDF graphs</a>
[<cite><a href="#ref-rdfconcepts">RDF Concepts</a></cite>]
is, however, provided in <a href="mapping.html">Section 4</a>.
</p>

<p>
This document contains two formal semantics for OWL.
One of these semantics, defined in 
<a href="direct.html#3">Section 3</a>,
is a direct, standard model-theoretic semantics for
OWL ontologies written in the abstract syntax.
The other, defined in <a href="rdfs.html#5">Section 5</a>,
is a vocabulary extension of the RDF semantics 
[<cite><a href="#ref-rdfmt">RDF Semantics</a></cite>] that provides semantics
for OWL ontologies in the form of RDF graphs.
Two versions of this second semantics are provided, one that corresponds
more closely to the direct semantics (and is thus a semantics for OWL DL) 
and one that can be used in cases where classes need to be treated as
individuals or other situations that cannot be handled in the abstract
syntax (and is thus a semantics for OWL Full).  These two versions are 
actually very close, only differing in how they divide up the domain of
discourse.
</p>

<p>
<a href="proofs.html">Appendix A</a>
contains a proof that the direct and RDFS-compatible semantics have the same
consequences on OWL ontologies that correspond to abstract OWL
ontologies that separate OWL individuals, OWL classes, OWL properties, 
and the RDF, RDFS, and OWL structural vocabulary.
<a href="proofs.html">Appendix A</a>
also contains the sketch of a proof that the entailments in the
RDFS-compatible semantics for OWL Full include all the entailments in
the RDFS-compatible semantics for OWL DL.
Finally a few examples of the various concepts defined in the document are
presented in <a href="examples.html">Appendix B</a>.
</p>

<p>
This document is designed to be read by those interested in the
technical details of OWL.  It is not particularly intended for the
casual reader, who should probably first read the OWL Guide
[<cite><a href="#ref-guide">OWL Guide</a></cite>].  Developers of parsers
and other syntactic tools for 
OWL will be particularly interested in Sections 
<a href="syntax.html#2">2</a> and <a href="mapping.html#4">4</a>.
Developers of reasoners and other semantic tools for OWL will be
particularly interested in Sections
<a href="direct.html#3">3</a> and <a href="rdfs.html#5">5</a>.
</p>

<hr />

<!-- split here -->

<h2><a name="C"></a>Appendix C. Changes from Last Call (Informative)</h2>

<div class="editorialchange">

<p>
This appendix provides an informative account of the changes from the
last-call version of this document.
All substantive post-last call changes to the document, as well as some editorial
post-last-call changes, are indicated in the style of this appendix.
</p>

<h3><a name="C.1"></a>C.1 Substantive changes after Last Call</h3> 

<p>
This section provides information on the post Last Call changes to the document that make
changes to the specification of OWL.  
</p>

<ul>
<li> [10 April 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Apr/0046.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Apr/0046.html</a>,
	added <span class="syntax">owl:Class</span>, 
	 <span class="syntax">owl:Restriction</span>, 
	 <span class="syntax">owl:ObjectProperty</span>, 
	 <span class="syntax">owl:DatatypeProperty</span>, 
	 <span class="syntax">owl:AnnotationProperty</span>, 
	 <span class="syntax">owl:OntologyProperty</span>, 
	 <span class="syntax">owl:Ontology</span>, 
	 <span class="syntax">owl:AllDifferent</span>, 
	 <span class="syntax">owl:FunctionalProperty</span>, 
	 <span class="syntax">owl:InverseFunctionalProperty</span>, 
	 <span class="syntax">owl:SymmetricProperty</span>, and 
	 <span class="syntax">owl:TransitiveProperty</span>
	to C<sub>I</sub>
	in <a href="rdfs.html#5.2">Section 5.2</a>.  Some of these were
	inferrable already.  
	</li>

<li> [10 April 2003] 
	Related to
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Apr/0046.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Apr/0046.html</a>,
	added <span class="syntax">owl:distinctMembers</span>
	to R<sub>I</sub>
	in <a href="rdfs.html#5.2">Section 5.2</a>. 
	</li>

<li> [15 April 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Apr/0064.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Apr/0064.html</a>,
	added <span class="syntax">owl:OntologyProperty</span>
	to the disallowed vocabulary 
	in <a href="mapping.html#disallowed_owl_vocabulary">disallowed OWL vocabulary</a>
	in <a href="mapping.html#4.2">Section 4.2</a>. 
	</li>

<li> [5 May 2003] 
	Per a decision of the Web Ontology working group on 1 May 2003
	to add <span class="syntax">owl:Nothing</span> to OWL Lite, 
	recorded in 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0017.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0017.html</a>,
	changed <a href="syntax.html#owl_Nothing_syntax">the introduction of
	owl:Nothing</a> to so indicate.
	The <a href="#owl_Nothing">index</a> for
	<span class="syntax">owl:Nothing</span> 
	was also updated.
	</li>

<li> [9 May 2003]
	To improve internal consistency, added optional 
	<span class="syntax">rdf:Property</span> types for Annotation
	Properties in 
	<a href="mapping.html#4.1">Section 4.1</a>.  
	</li>

<li> [30 May 2003]
	Per a decision of the Web Ontology working group on 29 May 2003 to
	modify the mapping of EquivalentClasses,
	recorded in 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0402.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0402.html</a> 
	and in response to 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Apr/0003.html"> 
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Apr/0003.html</a>
	and <a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0052.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0052.html</a>,
	changed the mapping rule for 
		EquivalentClasses(d1 ... dn)
	to
		T(di) owl:equivalentTo T(dj) .  for all &lt;i,j&gt; in G 
		where G is a set of pairs over {1,...,n} that if
		interpreted as an undirected graph forms a connected graph
		for {1,...,n}.
	</li>

<li> [30 May 2003]
	Per a decision of the Web Ontology working group on 29 May 2003 to
	add axioms for ontology properties,
	recorded in 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0402.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0402.html</a>,
	added axioms for ontology properties to the OWL Lite and OWL DL
	abstract syntax in Sections <a href="syntax.html#2.3.1.3">2.3.1.3</a>.  
	and <a href="syntax.html#2.3.2.4">Section 2.3.2.4</a>; 
	added direct semantics conditions for ontology property axioms
	in <a href="direct.html#3.3">Section 3.3</a>; and
	added a mapping for ontology property axioms
	in <a href="mapping.html#4.1">Section 4.1</a>.
	Fixed the proofs of <a href="proofs.html#lemma-2">Lemma 2</a>
	and <a href="proofs.html#lemma-3">Lemma 3</a>.
	</li>

<li> [30 May 2003]
	Per a decision of the Web Ontology working group on 29 May 2003 to
	change the semantics for 
	<span class="syntax">owl:intersectionOf</span> and related
	resources from an intensional semantics to an extensional semantics,
	recorded in 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0402.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0402.html</a>,
	modified the semantic conditions for 
	<span class="syntax">owl:intersectionOf</span>,
	<span class="syntax">owl:unionOf</span>,
	<span class="syntax">owl:complementOf</span>, and 
	<span class="syntax">owl:oneOf</span> 
	in <a href="rdfs.html#5.2">Section 5.2</a>.  
	No change needed to be made to the proof of 
	<a href="proofs.html#lemma-1">Lemma 1</a>. 
	Fixed the proofs of 
	<a href="proofs.html#lemma-4">Lemma 4</a> and
	<a href="proofs.html#lemma-2">Lemma 2</a>.
	</li>

<li> [2 June 2003]
	In response to an observation by Jeremy Carroll in
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Jun/0004.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Jun/0004.html</a>,
	changed the mapping rule for anonymous individuals with no types 
	slightly in <a href="mapping.html#4.1">Section 4.1</a>.  
	</li>

<li> [4 June 2003]
	In response to
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Jun/0011.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Jun/0011.html</a>,
	the treatment of datatypes and rdfs:Literal has been slightly
	changed in <a href="syntax.html#2.3.1.3">Section 2.3.1.3</a>,
	<a href="syntax.html#2.3.2.3">Section 2.3.2.3</a>, and
	<a href="mapping.html#4.1">Section 4.1</a>.
	</li>

<li> [4 June 2003]
	In response to
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0050.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0050.html</a>,
	point owlsas-rdf-equivalent-class, modified the treatment of
	ontology annotations in <a href="direct.html#3.4">Section 3.4</a>.  
	</li>

<li> [5 June 2003]
	In response to a comment by Jeremy Carroll in
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Jun/0004.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Jun/0004.html</a>,
	the direct semantics has been modified to allow for domain elements
	that are not OWL individuals.  These domain elements are used to
	provide meaning for annotations on classes, properties, and ontologies.
	Changes have been made in 
	<a href="direct.html#3.1">Section 3.1</a>,
	<a href="direct.html#3.2">Section 3.2</a>,
	<a href="direct.html#3.3">Section 3.3</a>,
	and 
	<a href="proofs.html#A.1">Appendix A.1</a>.
	</li> 

<li> [6 June 2003]
	Changed the treatment of datatypes to correspond with the
	substantive post-last-call fixes and changes to the treatment of
	datatypes in RDF.
<!-- Take out link to editor's draft.
	See <a href="http://www.w3.org/TR/2004/REC-rdf-mt-20040210/">
	http://www.w3.org/TR/2004/REC-rdf-mt-20040210/</a>.
-->
	Changes have been made in 
	<a href="direct.html#3.1">Section 3.1</a> and
	<a href="proofs.html#A.1">Appendix A.1</a>.
	</li>

<li> [26 June 2003]
	Per a decision of the Web Ontology working group on 26 June 2003
	to replace <span class="syntax">owl:sameIndividualAs</span> with 
	<span class="syntax">owl:sameAs</span>,
	recorded in 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Jun/0364.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Jun/0364.html</a>,
	made changes to
	<a href="syntax.html#2.2">Section 2.2</a>,
	<a href="direct.html#3.3">Section 3.3</a>,
	<a href="mapping.html#4.1">Section 4.1</a>,
	<a href="mapping.html#4.2">Section 4.2</a>,
	<a href="rdfs.html#5.2">Section 5.2</a>, and
	<a href="proofs.html#A.1">Appendix A.1</a>.
	</li>

<li> [30 June 2003]
	Fixed a bug in the semantic conditions for 
	<span class="syntax">owl:hasValue</span> 
	noticed by Jeremy Carroll, changing the conditions for the value
	from a property to an individual or a data value
	in <a href="rdfs.html#5.2">Section 5.2</a>.
	</li>

<li> [23 July 2003]
	In response to a substantive post-last-call change to the RDF semantics, 
	changing the if-and-only-if conditions for 
	<span class="syntax">rdfs:subClassOf</span> and 
	<span class="syntax">rdfs:subPropertyOf</span> to only-if
	conditions,
	added if-and-only-if conditions for 
	<span class="syntax">rdfs:subClassOf</span>, 
	over OWL classes, and
	<span class="syntax">rdfs:subPropertyOf</span>,
	over OWL individual-valued properties and 
	over OWL datatype properties,
	to <a href="rdfs.html#5.2">Section 5.2</a>.
	</li>

<li> [23 July 2003]
	In response to a substantive change to the RDF syntax mapping to
	triples, removing the typing triples for collections, 
	[applicable document unknown],
	made typing of list resources optional in 
	<a href="mapping.html#4.1">Section 4.1</a>.
	Also modified an example in 
	<a href="examples.html#B.1">Appendix B.1</a>.
	</li>
</ul>

<h3><a name="C.2"></a>C.2 Editorial changes after Last Call</h3> 

<p>
This section provides information on post Last Call editorial changes to the document, 
i.e., changes that do not affect the specification of OWL.
</p>

<ul>
<li> [9 April 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0023.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0023.html</a>,
	point 2, changed ``most information about properties'' to
	``most information concerning properties''
	in <a href="syntax.html#2.3">Section 2.3</a>. 
	</li>

<li> [14 April 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0029.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0029.html</a>,
	point 1, added 
	``Because there is no standard way to go from a URI reference to an XML
	Schema datatype in an XML Schema, there is no standard way to use
	user-defined XML Schema datatypes in OWL.''
	to the discussion of allowable XML Schema datatypes in
	<a href="syntax.html#2">Section 2</a>.  
	</li>

<li> [14 April 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0029.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0029.html</a>,
	point 2.1, added 
	``(The property rdf:type is added to the annotation properties so as
	to provide a meaning for deprecation, see 
	<a href="direct.html#owl_DeprecatedClass_semantics">below</a>.)'' after
	``ER provides meaning for URI references that are used as
	OWL properties.'' in 
	<a href="direct.html#3.1">Section 3.1</a>.  
	</li>

<li> [14 April 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0029.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0029.html</a>,
	point 2.3, added ``A datatype theory must contain datatypes for
	<span class="syntax">xsd:string</span> and 
	<span class="syntax">xsd:integer</span>.  It may contain datatypes
	for the other
	<a href="syntax.html#owl_built_in_datatypes">built-in XML Schema
	datatypes that are suitable for use in OWL</a>.  It may also
	contain other datatypes, but there is no provision in the OWL
	syntax for conveying what these datatypes are.'' just after the
	definition of a datatype theory in 
	<a href="direct.html#3.1">Section 3.1</a>.  
	</li>

<li> [14 April 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0029.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0029.html</a>,
	point 2.5, added ``annotations''  the the list of things that EC is
	extended to in 
	<a href="direct.html#3.2">Section 3.2</a>.  
	</li>

<li> [9 May 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0050.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0050.html</a>,
	point owlsas-rdf-datatype-denotation, removed the phrase ``as in RDF''
	from 
	<a href="syntax.html#2.1">Section 2.1</a>.  
	</li>

<li> [9 May 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0050.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0050.html</a>,
	point owlsas-rdf-equivalent-class, added an explanation of why one
	might admit <span class="syntax">EquivalentClasses</span> with only
	one description in 
	<a href="syntax.html#2.3.2.1">Section 2.3.2.1</a>.  
	</li>

<li> [9 May 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0050.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0050.html</a>,
	added ``, for n>=1 '' in the semantic condition for
	multi-restrictions in
	<a href="direct.html#3.2">Section 3.2</a>.  
	</li>

<li> [9 May 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0050.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0050.html</a>,
	changed to ``include class identifiers and restrictions''
	in <a href="syntax.html#2.3.2.2">Section 2.3.2.2</a>
	and ``Elements of the OWL vocabulary that construct descriptions''
	in <a href="rdfs.html#5.2">Section 5.2</a>.
	</li>

<li> [13 May 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0180.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0180.html</a>,
	the links in the table of contents for 
	in <a href="proofs.html">Appendix A</a>
	were fixed.
	</li>

<li> [14 May 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0030.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0030.html</a>,
	added a new paragraph to the beginning of
	<a href="mapping.html">Section 4.</a>
	</li>

<li> [14 May 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0057.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0057.html</a>,
	made some changes to the wording on OWL ontologies in the abstract
	syntax near the beginning of 
	<a href="syntax.html#2.1">Section 2.1.</a>
	</li>

<li> [14 May 2003] 
	In response to
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0057.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0057.html</a>,
	added anchors to the transformations in
	<a href="mapping.html#4.1">Section 4.1.</a>
	</li>

<li> [14 May 2003] 
	In response to some discussion about ontology names
	changed the discussion of the purpose of ontology names in 
	<a href="syntax.html#2.1">Section 2.1.</a>
	</li>

<li> [22 May 2003]
	In response to a message from Jeff Heflin,
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0302.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0302.html</a>,
	added a comment to the effect tools should determine entailment
	between imports closures in 
	<a href="rdfs.html#5.3">Section 5.3</a> and 
	<a href="rdfs.html#5.4">Section 5.4</a>.  
	(Removed on 27 May 2003.)
	</li>

<li> [22 May 2003]
	Changed ``consistent with the Web'' to ``imports closed''
	<a href="rdfs.html#5.3">Section 5.3</a> and 
	<a href="proofs.html">Appendix A</a>.
	</li>

<li> [26 May 2003]
	In response to 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0335.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0335.html</a>,
	changed several `if' to `iff' in definitions in 
	<a href="direct.html#3.4">Section 3.4</a>,
	<a href="rdfs.html#5.3">Section 5.3</a>, and 
	<a href="rdfs.html#5.4">Section 5.4</a>.  
	This is editorial as
	complete definitions are often written using `if'.
	</li>

<li> [30 May 2003]
	Fixed a typographical error in the proof of 
	<a href="proofs.html#lemma-4">Lemma 4</a>.
	</li>

<li> [4 June 2003]
	In response to 
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0029.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0029.html</a>,
	points 2.2 and 2.3, the status of
	<span class="syntax">rdfs:Literal</span> and 
	<span class="syntax">rdf:XMLLiteral</span> has been clarified in
	<a href="syntax.html">Section 2</a>,
	<a href="syntax.html#2.1">Section 2.1</a>, and
	<a href="mapping.html#4.2">Section 4.2</a>.
	</li>

<li> [19 June 2003]
	In response to 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Jun/0257.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Jun/0257.html</a>,
	changed to note after the proof of 
	<a href="rdfs.html#theorem-2">Theorem 2</a>
	in <a href="proofs.html#A.2">Appendix A.2</a>
	to note that the converse of the theorem is not true.
	</li>

<li> [19 June 2003]
	In response to 
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0055.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0055.html</a>,
	changed some explanatory text concerning the transformation to
	triples	in <a href="mapping.html#4.1">Section 4.1</a>.
	</li>

<li> [19 June 2003]
	In response to 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Jun/0264.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Jun/0264.html</a>,
	added introductory material about the other WebOnt documents to 
	<a href="#1">Section 1</a>.
	</li>

<li> [24 June 2003]
	In response to 
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0069.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003May/0069.html</a>,
	added note about correspondence to existing DLs to 
	<a href="syntax.html#2">Section 2</a>.
	</li>

<li> [22 July 2003]
	In response to 
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003Jul/0011.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003Jul/0011.html</a> and
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003Jul/0041.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003Jul/0041.html</a>,
	changed several uses of ``object'' to ``individual'' or ``individual-valued'' in 
	<a href="syntax.html#2">Section 2</a> and
	<a href="rdfs.html#5.2">Section 5.2</a> and made other editorial
	changes to <a href="rdfs.html#5.2">Section 5.2</a>.
	</li>

<li> [23 July 2003]
	To remove any reference to tools, made wording changes in
	<a href="direct.html#3.1">Section 3.1</a> and 
	<a href="syntax.html#2.1">Section 2.1</a>, concerning the treatment
	of datatypes.
	</li>

<li> [25 July 2003]
	In response to 
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0064.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0064.html</a>,
	added explicit tagging of the informative or normative nature of
	all sections. 
	</li>

<li> [25 July 2003]
	In response to 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Jul/0296.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Jul/0296.html</a>,
	removed a comment about the relationship between the two model
	theories from
	<a href="#1">Section 1</a>.
	</li>

<li> [6 August 2003]
	In response to 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Jul/0015.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Jul/0015.html</a>,
	changed <span class="syntax">owl:IndividualProperty</span>
	to <span class="syntax">owl:ObjectProperty</span> in
	<a href="proofs#A.2">Appendix A.2</a>.
	</li>

<li> [6 August 2003]
	In response to 
	<a href="syntax.html#2.1">Section 2.1</a>, concerning the treatment
	<a href="http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0064.html">
	http://lists.w3.org/Archives/Public/public-webont-comments/2003Apr/0064.html</a>,
	added quotes around 
	<span class="syntax">rdfs:Literal</span>
	to indicate that it is a terminal, not a non-terminal, in 
	<a href="syntax.html#2.3.1.3">Section 2.3.1.3</a> and
	<a href="syntax.html#2.3.2.3">Section 2.3.2.3</a>.
</li>
</ul>

<h3><a name="C.3"></a>C.3 Substantive changes after Candidate Recommendation</h3> 

<p>
This section provides information on the post Candidate Recommendation
changes to the document that make changes to the specification of OWL.  
</p>

<ul>
<li> [18 September 2003] 
	In response to 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Sep/0156.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Sep/0156.html</a>,
	made the type triples for the individualvaluedPropertyID production in
	<a href="mapping.html#4.1">Section 4.1</a>
	optional if typing triples would be produced from some other production.
</li>
<!-- changed later
<li> [18 September 2003] 
	In response to 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Sep/0177.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Sep/0177.html</a>,
	made the type triple for anonymous ontologies optional unless the
	ontology has annotations.  Changes were made to the second through
	sixth mapping rules in 
	<a href="mapping.html#4.1">Section 4.1</a>.
<li>
-->
<li> [3 October 2003] 
	In response to 
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Sep/0177.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Sep/0177.html</a>,
	augmented the mapping from the abstract syntax to triples to allow
	for collections of axioms and facts outside of ontologies to
	generate OWL DL in triples
	made the type triple for anonymous ontologies optional unless the
	ontology has annotations.  Upgraded the definition of entailment
	in the direct model theory to allow entailment to work over
	collections of axioms and facts outside of ontologies.
	Changes were made in 
	<a href="direct.html#3.4">Section 3.4</a>,
	<a href="mapping.html#4.2">Section 4.2</a>, and
	<a href="rdfs.html#5.4">Section 5.4</a>.
	Many of the proofs in <a href="proofs.html#A">Appendix A</a>
	required minor changes.
</li>
<li> [6 November 2003] In response to proposal <a
	href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Oct/0167.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Oct/0167.html</a>
	and in accordance with a decision of the working group
	<a href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Nov/0000.html">
	http://lists.w3.org/Archives/Public/www-webont-wg/2003Nov/0000.html</a>,
	added the condition that EC(<span
	class="syntax">owl:Thing</span>) must be nonempty in <a
	href="direct.html#3.1">Section 3.1</a> and that IOT must be
	nonempty in <a href="rdfs.html#5.2">Section 5.2</a>.
</li>
<li> [29 November 2003] In response to <a
href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Nov/0064.html">
http://lists.w3.org/Archives/Public/www-webont-wg/2003Nov/0064.html</a>
and <a
href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Nov/0132.html">
http://lists.w3.org/Archives/Public/www-webont-wg/2003Nov/0132.html</a>,
made changes to <a href="rdfs.html#5.2">Section 5.2</a> to bring the
treatment of datatypes into line with the latest version of the RDF
semantics [<cite><a href="#ref-rdfmt">RDF Semantics</a></cite>].
</li>
<li> [29 November 2003] In response to <a
href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Nov/0064.html">
http://lists.w3.org/Archives/Public/www-webont-wg/2003Nov/0064.html</a>,
added a <a href="rdfs.html#note-correspondence">note</a> to the
beginning of <a href="rdfs.html">Section 5</a> (and a reference to
this note in <a href="rdfs.html#5.4">Section 5.4</a>) explicitly
stating that the Direct Model-Theoretic Semantics takes precedence
over the OWL DL semantics.
</li>
</ul>

<h3><a name="C.4"></a>C.4 Editorial changes after Candidate Recommendation</h3> 

<p>
This section provides information on post Candidate Recommendation editorial changes to the document, 
i.e., changes that do not affect the specification of OWL.
</p>

<ul>
<li> [29 November 2003] In response to <a
href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Nov/0132.html">
http://lists.w3.org/Archives/Public/www-webont-wg/2003Nov/0132.html</a>,
made several editorial changes to Sections <a
href="syntax.html">2</a>, <a href="direct.html">3</a>, <a
href="mapping.html">4</a> and <a href="rdfs.html">5</a>.
</li>
</ul>

<ul>
<li> [3 December 2003] In further response to <a
href="http://lists.w3.org/Archives/Public/www-webont-wg/2003Nov/0132.html">
http://lists.w3.org/Archives/Public/www-webont-wg/2003Nov/0132.html</a>
and ensuing discussion,
made several editorial changes to Sections <a href="direct.html">3</a> and
<a href="rdfs.html">5</a> and Appendix <a href="proofs.html">A</a>.
</li>
</ul>


<h3><a name="changes-since-PR"></a>C.5 Changes since Proposed Recommendation</h3> 


<p>
This section provides information on post Proposed Recommendation changes to the document.
</p>


<ul>
<li> [21 December 2003] Fixed typographical error: Recommentation
&rarr; Recommendation (in several places).
</li>
<li> [29 January 2004] In response to <a
href="http://lists.w3.org/Archives/Public/www-webont-wg/2004Jan/0021.html">http://lists.w3.org/Archives/Public/www-webont-wg/2004Jan/0021.html</a>,
clarified the <a href="mapping.html#separated_vocabulary">definition of separated
vocabulary</a> in <a href="mapping.html#4.2">Section 4.2</a>.
</li>
<li> [29 January 2004] In response to <a
href="http://www.ilrt.bris.ac.uk/discovery/chatlogs/webont/2004-01-29#T17-08-44">http://www.ilrt.bris.ac.uk/discovery/chatlogs/webont/2004-01-29#T17-08-44</a>,
made explicit in the definition of an RDF compatible OWL
interpretation in <a href="rdfs.html#5.2">Section 5.2</a> that an RDF
compatible datatype map necessarily includes a datatype for <span
class="syntax">rdf:XMLLiteral</span>.
</li>
</ul>


</div>

<hr />

<h2><a id="index" name="index">Index of Vocabulary (Informative)</a></h2>


<p>
The following table provides pointers to information about each
element of the OWL vocabulary, as well as some elements of the RDF and RDFS
vocabularies. 
The first column points to the vocabulary element's major definition
in the abstract syntax of <a href="syntax.html#2">Section 2</a>.
The second column points to the vocabulary element's major definition
in the OWL Lite abstract syntax.
The third column points to the vocabularly element's major definition
in the direct semantics of <a href="direct.html#3">Section 3</a>.
The fourth column points to the major piece of the translation from
the abstract syntax to triples for the vocabulary element
<a href="mapping.html#4">Section 4</a>.
The fifth column points to the vocabularly element's major definition
in the RDFS-compatible semantics of <a href="rdfs.html#5">Section 5</a>.
</p>

<table border="1" cellspacing="0">
<caption>Vocabulary Terms</caption>
<thead>
<tr><th>Vocabulary Term</th>
    <th>Abstract OWL DL Syntax</th>
    <th>Abstract OWL Lite Syntax</th>
    <th>Direct Semantics</th>
    <th>Mapping to Triples</th>
    <th>RDFS-Compatible Semantics</th>
</tr>
</thead>

<tbody>

<tr>
<td class="index"><a id="owl_AllDifferent">owl:AllDifferent</a></td>
<td class="index"></td>
<td class="index"></td>
<td class="index"></td>
<td class="index"><a href="mapping.html#owl_AllDifferent_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_AllDifferent_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_allValuesFrom">owl:allValuesFrom</a></td>
<td class="index"><a href="syntax.html#owl_allValuesFrom_syntax">2.3.2.3</a></td>
<td class="index"><a href="syntax.html#owl_allValuesFrom_syntax_lite">2.3.1.2</a></td>
<td class="index"><a href="direct.html#owl_allValuesFrom_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_allValuesFrom_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_allValuesFrom_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_AnnotationProperty">owl:AnnotationProperty</a></td>
<td class="index"><a href="syntax.html#owl_AnnotationProperty_syntax_lite">2.3.1.3</a></td>
<td class="index"><a href="syntax.html#owl_AnnotationProperty_syntax">2.3.2.4</a></td>
<td class="index"><a href="direct.html#owl_AnnotationProperty_semantics"><span class="editorialchange">3.2</span></a></td>
<td class="index"><a href="mapping.html#owl_AnnotationProperty_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_AnnotationProperty_rdf"><span class="editorialchange">5.2</span></a></td>
</tr>

<tr>
<td class="index"><a id="owl_backwardCompatibleWith">owl:backwardCompatibleWith</a></td>
<td class="index"><a href="syntax.html#owl_backwardCompatibleWith_syntax">2.1</a></td>
<td class="index"><a href="syntax.html#owl_backwardCompatibleWith_syntax">2.1</a></td>
<td class="index"></td>
<td class="index"><a href="mapping.html#owl_backwardCompatibleWith_mapping">4.1</a></td>
<td class="index"></td>
</tr>

<tr>
<td class="index"><a id="owl_cardinality">owl:cardinality</a></td>
<td class="index"><a href="syntax.html#owl_cardinality_syntax">2.3.2.3</a></td>
<td class="index"><a href="syntax.html#owl_cardinality_syntax_lite">2.3.1.2</a></td>
<td class="index"><a href="direct.html#owl_cardinality_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_cardinality_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_cardinality_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_Class">owl:Class</a></td>
<td class="index"><a href="syntax.html#owl_Class_syntax">2.3.2.1</a></td>
<td class="index"><a href="syntax.html#owl_Class_syntax_lite">2.3.1.1</a></td>
<td class="index"><a href="direct.html#owl_Class_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_Class_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_Class_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_complementOf">owl:complementOf</a></td>
<td class="index"><a href="syntax.html#owl_complementOf_syntax">2.3.2.2</a></td>
<td class="index"></td>
<td class="index"><a href="direct.html#owl_complementOf_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_complementOf_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_complementOf_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_DatatypeProperty">owl:DatatypeProperty</a></td>
<td class="index"><a href="syntax.html#owl_DatatypeProperty_syntax">2.3.2.4</a></td>
<td class="index"><a href="syntax.html#owl_DatatypeProperty_syntax_lite">2.3.1.3</a></td>
<td class="index"><a href="direct.html#owl_DatatypeProperty_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_DatatypeProperty_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_DatatypeProperty_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_DeprecatedClass">owl:DeprecatedClass</a></td>
<td class="index"><a href="syntax.html#owl_DeprecatedClass_syntax">2.3.2.1</a></td>
<td class="index"><a href="syntax.html#owl_DeprecatedClass_syntax_lite">2.3.1.1</a></td>
<td class="index"><a href="direct.html#owl_DeprecatedClass_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_DeprecatedClass_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_DeprecatedClass_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_DeprecatedProperty">owl:DeprecatedProperty</a></td>
<td class="index"><a href="syntax.html#owl_DeprecatedProperty_syntax">2.3.2.4</a></td>
<td class="index"><a href="syntax.html#owl_DeprecatedProperty_syntax_lite">2.3.1.3</a></td>
<td class="index"><a href="direct.html#owl_DeprecatedProperty_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_DeprecatedProperty_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_DeprecatedProperty_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_DataRange">owl:DataRange</a></td>
<td class="index"><a href="syntax.html#owl_DataRange_syntax">2.3.2.3</a></td>
<td class="index"><a href="syntax.html#owl_DataRange_syntax_lite"><span class="editorialchange">2.3.1.2</span></a></td>
<td class="index"><a href="direct.html#owl_DataRange_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_DataRange_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_DataRange_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_differentFrom">owl:differentFrom</a></td>
<td class="index"><a href="syntax.html#owl_differentFrom_syntax">2.2</a></td>
<td class="index"><a href="syntax.html#owl_differentFrom_syntax">2.2</a></td>
<td class="index"><a href="direct.html#owl_differentFrom_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_differentFrom_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_differentFrom_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_disjointWith">owl:disjointWith</a></td>
<td class="index"><a href="syntax.html#owl_disjointWith_syntax">2.3.2.1</a></td>
<td class="index"></td>
<td class="index"><a href="direct.html#owl_disjointWith_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_disjointWith_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_disjointWith_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_distinctMembers">owl:distinctMembers</a></td>
<td class="index"></td>
<td class="index"></td>
<td class="index"></td>
<td class="index"><a href="mapping.html#owl_distinctMembers_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_distinctMembers_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_equivalentClass">owl:equivalentClass</a></td>
<td class="index"><a href="syntax.html#owl_equivalentClass_syntax">2.3.2.1</a></td>
<td class="index"><a href="syntax.html#owl_equivalentClass_syntax_lite">2.3.1.1</a></td>
<td class="index"><a href="direct.html#owl_equivalentClass_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_equivalentClass_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_equivalentClass_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_equivalentProperty">owl:equivalentProperty</a></td>
<td class="index"><a href="syntax.html#owl_equivalentProperty_syntax">2.3.1.3</a></td>
<td class="index"><a href="syntax.html#owl_equivalentProperty_syntax">2.3.1.3</a></td>
<td class="index"><a href="direct.html#owl_equivalentProperty_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_equivalentProperty_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_equivalentProperty_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_FunctionalProperty">owl:FunctionalProperty</a></td>
<td class="index"><a href="syntax.html#owl_FunctionalProperty_syntax">2.3.2.4</a></td>
<td class="index"><a href="syntax.html#owl_FunctionalProperty_syntax_lite">2.3.1.3</a></td>
<td class="index"><a href="direct.html#owl_FunctionalProperty_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_FunctionalProperty_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_FunctionalProperty_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_hasValue">owl:hasValue</a></td>
<td class="index"><a href="syntax.html#owl_hasValue_syntax">2.3.2.3</a></td>
<td class="index"></td>
<td class="index"><a href="direct.html#owl_hasValue_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_hasValue_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_hasValue_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_imports">owl:imports</a></td>
<td class="index"><a href="syntax.html#owl_imports_syntax">2.1</a></td>
<td class="index"><a href="syntax.html#owl_imports_syntax">2.1</a></td>
<td class="index"><a href="direct.html#owl_imports_semantics">3.4</a></td>
<td class="index"><a href="mapping.html#owl_imports_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_imports_rdf">5.4</a></td>
</tr>

<tr>
<td class="index"><a id="owl_incompatibleWith">owl:incompatibleWith</a></td>
<td class="index"><a href="syntax.html#owl_incompatibleWith_syntax">2.1</a></td>
<td class="index"><a href="syntax.html#owl_incompatibleWith_syntax">2.1</a></td>
<td class="index"></td>
<td class="index"><a href="mapping.html#owl_incompatibleWith_mapping">4.1</a></td>
<td class="index"></td>
</tr>

<tr>
<td class="index"><a id="owl_intersectionOf">owl:intersectionOf</a></td>
<td class="index"><a href="syntax.html#owl_intersectionOf_syntax">2.3.2.2</a></td>
<td class="index"></td>
<td class="index"><a href="direct.html#owl_intersectionOf_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_intersectionOf_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_intersectionOf_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_InverseFunctionalProperty">owl:InverseFunctionalProperty</a></td>
<td class="index"><a href="syntax.html#owl_InverseFunctionalProperty_syntax">2.3.2.4</a></td>
<td class="index"><a href="syntax.html#owl_InverseFunctionalProperty_syntax_lite">2.3.1.3</a></td>
<td class="index"><a href="direct.html#owl_InverseFunctionalProperty_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_InverseFunctionalProperty_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_InverseFunctionalProperty_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_inverseOf">owl:inverseOf</a></td>
<td class="index"><a href="syntax.html#owl_inverseOf_syntax">2.3.2.4</a></td>
<td class="index"><a href="syntax.html#owl_inverseOf_syntax_lite">2.3.1.3</a></td>
<td class="index"><a href="direct.html#owl_inverseOf_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_inverseOf_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_inverseOf_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_maxCardinality">owl:maxCardinality</a></td>
<td class="index"><a href="syntax.html#owl_maxCardinality_syntax">2.3.2.3</a></td>
<td class="index"><a href="syntax.html#owl_maxCardinality_syntax_lite">2.3.1.2</a></td>
<td class="index"><a href="direct.html#owl_maxCardinality_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_maxCardinality_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_maxCardinality_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_minCardinality">owl:minCardinality</a></td>
<td class="index"><a href="syntax.html#owl_minCardinality_syntax">2.3.2.3</a></td>
<td class="index"><a href="syntax.html#owl_minCardinality_syntax_lite">2.3.1.2</a></td>
<td class="index"><a href="direct.html#owl_minCardinality_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_minCardinality_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_minCardinality_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_Nothing">owl:Nothing</a></td>
<td class="index"><a href="syntax.html#owl_Nothing_syntax">2.1</a></td>
<td class="index"><span class="editorialchange"><a href="syntax.html#owl_Nothing_syntax">2.1</a></span></td>
<td class="index"><a href="direct.html#owl_Nothing_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_Nothing_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_Nothing_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_ObjectProperty">owl:ObjectProperty</a></td>
<td class="index"><a href="syntax.html#owl_ObjectProperty_syntax">2.3.2.4</a></td>
<td class="index"><a href="syntax.html#owl_ObjectProperty_syntax_lite">2.3.1.3</a></td>
<td class="index"><a href="direct.html#owl_ObjectProperty_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_ObjectProperty_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_ObjectProperty_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_oneOf">owl:oneOf</a></td>
<td class="index"><a href="syntax.html#owl_oneOf_syntax">2.3.2.2</a></td>
<td class="index"></td>
<td class="index"><a href="direct.html#owl_oneOf_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_oneOf_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_oneOf_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_onProperty">owl:onProperty</a></td>
<td class="index"><a href="syntax.html#owl_onProperty_syntax">2.3.2.3</a></td>
<td class="index"><a href="syntax.html#owl_onProperty_syntax_lite">2.3.1.2</a></td>
<td class="index"><a href="direct.html#owl_onProperty_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_onProperty_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_onProperty_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_Ontology">owl:Ontology</a></td>
<td class="index"><a href="syntax.html#owl_Ontology_syntax">2.1</a></td>
<td class="index"><a href="syntax.html#owl_Ontology_syntax">2.1</a></td>
<td class="index"><a href="direct.html#owl_Ontology_semantics">3.4</a></td>
<td class="index"><a href="mapping.html#owl_Ontology_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_Ontology_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_OntologyProperty">owl:OntologyProperty</a></td>
<td class="index"><a href="syntax.html#owl_OntologyProperty_syntax_lite">2.3.1.3</a></td>
<td class="index"><a href="syntax.html#owl_OntologyProperty_syntax">2.3.2.4</a></td>
<td class="index"><a href="direct.html#owl_OntologyProperty_semantics"><span class="editorialchange">3.2</span></a></td>
<td class="index"><a href="mapping.html#owl_OntologyProperty_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_OntologyProperty_rdf"><span class="editorialchange">5.2</span></a></td>
</tr>

<tr>
<td class="index"><a id="owl_priorVersion">owl:priorVersion</a></td>
<td class="index"><a href="syntax.html#owl_priorVersion_syntax">2.1</a></td>
<td class="index"><a href="syntax.html#owl_priorVersion_syntax">2.1</a></td>
<td class="index"></td>
<td class="index"><a href="mapping.html#owl_priorVersion_mapping">4.1</a></td>
<td class="index"></td>
</tr>

<tr>
<td class="index"><a id="owl_Restriction">owl:Restriction</a></td>
<td class="index"><a href="syntax.html#owl_Restriction_syntax">2.3.2.3</a></td>
<td class="index"><a href="syntax.html#owl_Restriction_syntax_lite">2.3.1.2</a></td>
<td class="index"><a href="direct.html#owl_Restriction_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_Restriction_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_Restriction_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_sameAs">owl:sameAs</a></td>
<td class="index"><a href="syntax.html#owl_sameAs_syntax">2.2</a></td>
<td class="index"><a href="syntax.html#owl_sameAs_syntax">2.2</a></td>
<td class="index"><a href="direct.html#owl_sameAs_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_sameAs_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_sameAs_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_someValuesFrom">owl:someValuesFrom</a></td>
<td class="index"><a href="syntax.html#owl_someValuesFrom_syntax">2.3.2.3</a></td>
<td class="index"><a href="syntax.html#owl_someValuesFrom_syntax_lite">2.3.1.2</a></td>
<td class="index"><a href="direct.html#owl_someValuesFrom_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_someValuesFrom_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_someValuesFrom_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_SymmetricProperty">owl:SymmetricProperty</a></td>
<td class="index"><a href="syntax.html#owl_SymmetricProperty_syntax">2.3.2.4</a></td>
<td class="index"><a href="syntax.html#owl_SymmetricProperty_syntax_lite">2.3.1.3</a></td>
<td class="index"><a href="direct.html#owl_SymmetricProperty_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_SymmetricProperty_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_SymmetricProperty_rdf">4.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_Thing">owl:Thing</a></td>
<td class="index"><a href="syntax.html#owl_Thing_syntax">2.1</a></td>
<td class="index"><a href="syntax.html#owl_Thing_syntax">2.1</a></td>
<td class="index"><a href="direct.html#owl_Thing_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_Thing_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_Thing_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_TransitiveProperty">owl:TransitiveProperty</a></td>
<td class="index"><a href="syntax.html#owl_TransitiveProperty_syntax">2.3.2.4</a></td>
<td class="index"><a href="syntax.html#owl_TransitiveProperty_syntax_lite">2.3.1.3</a></td>
<td class="index"><a href="direct.html#owl_TransitiveProperty_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#owl_TransitiveProperty_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_TransitiveProperty_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_unionOf">owl:unionOf</a></td>
<td class="index"><a href="syntax.html#owl_unionOf_syntax">2.3.2.2</a></td>
<td class="index"></td>
<td class="index"><a href="direct.html#owl_unionOf_semantics">3.2</a></td>
<td class="index"><a href="mapping.html#owl_unionOf_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#owl_unionOf_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="owl_versionInfo">owl:versionInfo</a></td>
<td class="index"><a href="syntax.html#owl_versionInfo_syntax">2.1</a></td>
<td class="index"><a href="syntax.html#owl_versionInfo_syntax">2.1</a></td>
<td class="index"></td>
<td class="index"><a href="mapping.html#owl_versionInfo_mapping">4.1</a></td>
<td class="index"></td>
</tr>

<tr>
<td class="index"><a id="rdf_List">rdf:List</a></td>
<td class="index"></td>
<td class="index"></td>
<td class="index"></td>
<td class="index"><a href="mapping.html#rdf_List_mapping"><span class="editorialchange">4.1</span></a></td>
<td class="index"><a href="rdfs.html#rdf_List_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="rdf_nil">rdf:nil</a></td>
<td class="index"></td>
<td class="index"></td>
<td class="index"></td>
<td class="index"><a href="mapping.html#rdf_nil_mapping"><span class="editorialchange">4.1</span></a></td>
<td class="index"><a href="rdfs.html#rdf_nil_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="rdf_type">rdf:type</a></td>
<td class="index"><a href="syntax.html#rdf_type_syntax">2.2</a></td>
<td class="index"><a href="syntax.html#rdf_type_syntax">2.2</a></td>
<td class="index"><a href="direct.html#rdf_type_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#rdf_type_mapping">4.1</a></td>
<td class="index"></td>
</tr>

<tr>
<td class="index"><a id="rdfs_comment">rdfs:comment</a></td>
<td class="index"><a href="syntax.html#rdfs_comment_syntax">2.1</a></td>
<td class="index"><a href="syntax.html#rdfs_comment_syntax">2.1</a></td>
<td class="index"></td>
<td class="index"><a href="mapping.html#rdfs_comment_mapping">4.1</a></td>
<td class="index"></td>
</tr>

<tr>
<td class="index"><a id="rdfs_Datatype">rdfs:Datatype</a></td>
<td class="index"></td>
<td class="index"></td>
<td class="index"></td>
<td class="index"><a href="mapping.html#rdfs_Literal_mapping"><span class="editorialchange">4.1</span></a></td>
<td class="index"><a href="rdfs.html#rdfs_Datatype_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="rdfs_domain">rdfs:domain</a></td>
<td class="index"><a href="syntax.html#rdfs_domain_syntax">2.3.2.4</a></td>
<td class="index"><a href="syntax.html#rdfs_domain_syntax_lite">2.3.1.3</a></td>
<td class="index"><a href="direct.html#rdfs_domain_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#rdfs_domain_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#rdfs_domain_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="rdfs_label">rdfs:label</a></td>
<td class="index"><a href="syntax.html#rdfs_label_syntax">2.1</a></td>
<td class="index"><a href="syntax.html#rdfs_label_syntax">2.1</a></td>
<td class="index"></td>
<td class="index"><a href="mapping.html#rdfs_label_mapping">4.1</a></td>
<td class="index"></td>
</tr>

<tr>
<td class="index"><a id="rdfs_Literal">rdfs:Literal</a></td>
<td class="index"><a href="syntax.html#rdfs_Literal_syntax_lite">2.3.1.3</a></td>
<td class="index"><a href="syntax.html#rdfs_Literal_syntax">2.3.2.3</a></td>
<td class="index"><a href="direct.html#rdfs_Literal_semantics">4.1</a></td>
<td class="index"><a href="mapping.html#rdfs_Literal_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#rdfs_Literal_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="rdfs_range">rdfs:range</a></td>
<td class="index"><a href="syntax.html#rdfs_range_syntax">2.3.2.4</a></td>
<td class="index"><a href="syntax.html#rdfs_range_syntax_lite">2.3.1.3</a></td>
<td class="index"><a href="direct.html#rdfs_range_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#rdfs_range_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#rdfs_range_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="rdfs_subClassOf">rdfs:subClassOf</a></td>
<td class="index"><a href="syntax.html#rdfs_subClassOf_syntax">2.3.2.1</a></td>
<td class="index"><a href="syntax.html#rdfs_subClassOf_syntax_lite">2.3.1.1</a></td>
<td class="index"><a href="direct.html#rdfs_subClassOf_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#rdfs_subClassOf_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#rdfs_subClassOf_rdf">5.2</a></td>
</tr>

<tr>
<td class="index"><a id="rdfs_subPropertyOf">rdfs:subPropertyOf</a></td>
<td class="index"><a href="syntax.html#rdfs_subPropertyOf_syntax">2.3.1.3</a></td>
<td class="index"><a href="syntax.html#rdfs_subPropertyOf_syntax">2.3.1.3</a></td>
<td class="index"><a href="direct.html#rdfs_subPropertyOf_semantics">3.3</a></td>
<td class="index"><a href="mapping.html#rdfs_subPropertyOf_mapping">4.1</a></td>
<td class="index"><a href="rdfs.html#rdfs_subPropertyOf_rdf">5.2</a></td>
<td class="index"></td>
</tr>

</tbody></table>


<hr />

<h2><a id="acknowledgments" name="acknowledgments">Acknowledgments</a></h2>

<p>
The 
<a href="http://www.daml.org/committee/">
Joint US/EU ad hoc Agent Markup Language Committee
</a>
developed DAML+OIL, which is the direct precursor to OWL.
Many of the ideas in DAML+OIL and thus in OWL are also present in the
<a href="http://www.ontoknowledge.org/index.shtml">
Ontology Inference Layer (OIL)</a>.
</p>

<p>
This document is the result of extensive discussions within the
<a href="http://www.w3.org/2001/sw/WebOnt/">Web Ontology Working Group</a>
as a whole.  The participants in this working group included:  
Yasser alSafadi, 
Jean-Fran&#231;ois Baget, 
James Barnette, 
Sean Bechhofer, 
Jonathan Borden, 
Frederik Brysse, 
Stephen Buswell, 
Jeremy Carroll, 
Dan Connolly, 
Peter Crowther, 
Jonathan Dale, 
Jos De Roo, 
David De Roure, 
Mike Dean, 
Larry Eshelman, 
J&#233;r&#244;me Euzenat, 
Tim Finin, 
Nicholas Gibbins, 
Sandro Hawke, 
Patrick Hayes, 
Jeff Heflin,
Ziv Hellman, 
James Hendler, 
Bernard Horan, 
Masahiro Hori, 
Ian Horrocks, 
Jane Hunter, 
Francesco Iannuzzelli, 
R&#252;diger Klein, 
Natasha Kravtsova, 
Ora Lassila, 
Massimo Marchiori, 
Deborah McGuinness, 
Enrico Motta, 
Leo Obrst, 
Mehrdad Omidvari, 
Martin Pike, 
Marwan Sabbouh, 
Guus Schreiber, 
Noboru Shimizu, 
Michael Sintek,
Michael K. Smith, 
John Stanton, 
Lynn Andrea Stein, 
Herman ter Horst, 
David Trastour, 
Frank van Harmelen, 
Bernard Vatant,
Raphael Volz, 
Evan Wallace, 
Christopher Welty, 
Charles White,
and John Yanosy.

</p>

<hr />

<h2><a id="references" name="references">References</a></h2>

<h3><a id="references-normative" name="references-normative">Normative
References</a></h3>

<dl>

<dt><a name="ref-rdfconcepts" id="ref-rdfconcepts">[RDF Concepts]</a></dt>
<dd><cite><a
href="http://www.w3.org/TR/2004/REC-rdf-concepts-20040210/">Resource
Description Framework (RDF): Concepts and Abstract Syntax</a></cite>,
Graham Klyne and Jeremy J. Carroll, Editors, W3C Recommendation, 10 February 2004,
http://www.w3.org/TR/2004/REC-rdf-concepts-20040210/ . <a
href="http://www.w3.org/TR/rdf-concepts/">Latest version</a> available
at http://www.w3.org/TR/rdf-concepts/ .</dd>

<dt><a name="ref-rdfmt" id="ref-rdfmt">[RDF Semantics]</a></dt>
<dd><cite><a
href="http://www.w3.org/TR/2004/REC-rdf-mt-20040210/">RDF
Semantics</a></cite>, Patrick Hayes, Editor, W3C Recommendation, 10 February 2004, http://www.w3.org/TR/2004/REC-rdf-mt-20040210/
. <a href="http://www.w3.org/TR/rdf-mt/">Latest version</a> available
at http://www.w3.org/TR/rdf-mt/ .</dd>

<dt><a name="ref-rdfsyntax" id="ref-rdfsyntax">[RDF Syntax]</a></dt>
<dd><cite><a
href="http://www.w3.org/TR/2004/REC-rdf-syntax-grammar-20040210/">RDF/XML
Syntax Specification (Revised)</a></cite>, Dave Beckett, Editor, W3C
Recommendation, 10 February 2004,
http://www.w3.org/TR/2004/REC-rdf-syntax-grammar-20040210/ . <a
href="http://www.w3.org/TR/rdf-syntax-grammar/">Latest version</a>
available at http://www.w3.org/TR/rdf-syntax-grammar/ .</dd>

<dt><a name="ref-rdf-testcases" id="ref-rdf-testcases">[RDF Tests]</a></dt>
<dd><cite><a
href="http://www.w3.org/TR/2004/REC-rdf-testcases-20040210/">RDF
Test Cases</a></cite>, Jan Grant and Dave Beckett, Editors, W3C
Recommendation, 10 February 2004,
http://www.w3.org/TR/2004/REC-rdf-testcases-20040210/ . <a
href="http://www.w3.org/TR/rdf-testcases/">Latest version</a>
available at http://www.w3.org/TR/rdf-testcases/ .</dd>

<dt><a id="ref-xml">[XML]</a></dt>
<dd>
<cite><a href="http://www.w3.org/TR/2000/REC-xml-20001006">
Extensible Markup Language (XML) 1.0 (Second Edition)</a></cite>.
Tim Bray, Jean Paoli, C. M. Sperberg-McQueen, and Eve Maler, eds.
W3C Recommendation 6 October 2000.
Latest version is available at 
<a href="http://www.w3.org/TR/REC-xml">http://www.w3.org/TR/REC-xml</a>.
</dd>

<dt><a id="ref-xmls-datatypes">[XML Schema Datatypes]</a></dt>
<dd>
<cite><a href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/">
XML Schema Part 2: Datatypes.</a></cite>.
Paul V. Biron and Ashok Malhotra, eds.
W3C Recommendation 02 May 2001.
Latest version is available at 
<a href="http://www.w3.org/TR/xmlschema-2/">http://www.w3.org/TR/xmlschema-2/</a>.
</dd>

</dl>

<h3><a id="references-other" name="references-other">Other
References</a></h3>

<dl>

<dt><a id="ref-daml">[DAML+OIL]</a></dt>
<dd>
<cite>
<a href="http://www.w3.org/TR/2001/NOTE-daml+oil-reference-20011218">
DAML+OIL (March 2001) Reference Description</a></cite>.
Dan Connolly, Frank van Harmelen, Ian Horrocks, 
Deborah L. McGuinness, Peter F. Patel-Schneider, and Lynn Andrea Stein.
W3C Note 18 December 2001.
Latest version is available at 
<a href="http://www.w3.org/TR/daml+oil-reference">http://www.w3.org/TR/daml+oil-reference</a>.
</dd>

<dt><a name="ref-guide" id="ref-guide">[OWL Guide]</a></dt>
<dd><cite><a
href="http://www.w3.org/TR/2004/REC-owl-guide-20040210/">OWL Web
Ontology Language Guide</a></cite>, Michael K. Smith, Chris Welty, and
Deborah L. McGuinness, Editors, W3C Recommendation, 10 February 2004,
http://www.w3.org/TR/2004/REC-owl-guide-20040210/ . <a
href="http://www.w3.org/TR/owl-guide/">Latest version</a> available at
http://www.w3.org/TR/owl-guide/ .</dd>

<dt><a id="ref-issues">[OWL Issues]</a></dt>
<dd>
<cite><a href="http://www.w3.org/2001/sw/WebOnt/webont-issues.html">
Web Ontology Issue Status</a></cite>.
Michael K. Smith, ed.
27 June 2003.
</dd>

<dt><a name="ref-overview" id="ref-overview">[OWL
Overview]</a></dt> <dd><cite><a
href="http://www.w3.org/TR/2004/REC-owl-features-20040210/">OWL Web
Ontology Language Overview</a></cite>, Deborah L. McGuinness and Frank
van Harmelen, Editors, W3C Recommendation, 10 February 2004,
http://www.w3.org/TR/2004/REC-owl-features-20040210/ . <a
href="http://www.w3.org/TR/owl-features/">Latest version</a> available
at http://www.w3.org/TR/owl-features/ .</dd>

<dt><a name="ref-ref" id="ref-ref">[OWL
Reference]</a></dt> <dd><cite><a
href="http://www.w3.org/TR/2004/REC-owl-ref-20040210/">OWL Web
Ontology Language Reference</a></cite>, Mike Dean and Guus Schreiber,
Editors, W3C Recommendation, 10 February 2004,
http://www.w3.org/TR/2004/REC-owl-ref-20040210/ . <a
href="http://www.w3.org/TR/owl-ref/">Latest version</a> available at
http://www.w3.org/TR/owl-ref/ .</dd>

<dt><a name="ref-rdf-syntax" id="ref-rdf-syntax">[RDF Syntax]</a></dt>
<dd><cite><a
href="http://www.w3.org/TR/2004/REC-rdf-syntax-grammar-20040210/">RDF/XML
Syntax Specification (Revised)</a></cite>, Dave Beckett, Editor, W3C
Recommendation, 10 February 2004,
http://www.w3.org/TR/2004/REC-rdf-syntax-grammar-20040210/ . <a
href="http://www.w3.org/TR/rdf-syntax-grammar/">Latest version</a>
available at http://www.w3.org/TR/rdf-syntax-grammar/ .</dd>

<dt><a name="ref-rdf-vocabulary" id="ref-rdf-vocabulary">[RDF
Vocabulary]</a></dt> <dd><cite><a
href="http://www.w3.org/TR/2004/REC-rdf-schema-20040210/">RDF
Vocabulary Description Language 1.0: RDF Schema</a></cite>, Dan
Brickley and R. V. Guha, Editors, W3C Recommendation, 10 February 2004, http://www.w3.org/TR/2004/REC-rdf-schema-20040210/ . <a
href="http://www.w3.org/TR/rdf-schema/">Latest version</a> available
at http://www.w3.org/TR/rdf-schema/ .</dd>

</dl>

<hr />


</body>
</html>