more validation
authordgarijo
Mon, 04 Mar 2013 01:29:11 +0100
changeset 5824 1019cf0111db
parent 5823 7ccfa2272ad8
child 5825 24080183f534
more validation
dc-note/releases/WD-prov-dc-20130312/Overview.html
--- a/dc-note/releases/WD-prov-dc-20130312/Overview.html	Mon Mar 04 01:18:48 2013 +0100
+++ b/dc-note/releases/WD-prov-dc-20130312/Overview.html	Mon Mar 04 01:29:11 2013 +0100
@@ -359,7 +359,8 @@
 	   The PROV Document Overview [<cite><a href="#bib-PROV-OVERVIEW" class="bibref">PROV-OVERVIEW</a></cite>] describes the overall state of PROV, and should be read before other PROV documents.
 	   </p>-->
 
- </div><div class="introductory section" id="sotd"><h2>Status of This Document</h2>
+ </div>
+ <div class="introductory section" id="sotd"><h2>Status of This Document</h2>
     
       
         <p>
@@ -446,10 +447,10 @@
       
     
   
-</section><section id="toc"><h2 class="introductory">Table of Contents</h2><ul class="toc"><li class="tocline"><a href="#introduction" class="tocxref"><span class="secno">1. </span>Introduction</a><ul class="toc"><li class="tocline"><a href="#namespaces-1" class="tocxref"><span class="secno">1.1 </span>Namespaces</a></li><li class="tocline"><a href="#structure-of-this-document" class="tocxref"><span class="secno">1.2 </span>Structure of this document</a></li></ul></li><li class="tocline"><a href="#preliminaries" class="tocxref"><span class="secno">2. </span>Preliminaries</a><ul class="toc"><li class="tocline"><a href="#provenance-in-dublin-core" class="tocxref"><span class="secno">2.1 </span>Provenance in Dublin Core</a></li><li class="tocline"><a href="#entities-in-dublin-core" class="tocxref"><span class="secno">2.2 </span>Entities in Dublin Core</a></li></ul></li><li class="tocline"><a href="#mapping-from-dublin-core-to-prov" class="tocxref"><span class="secno">3. </span>Mapping from Dublin Core to PROV</a><ul class="toc"><li class="tocline"><a href="#direct-mappings" class="tocxref"><span class="secno">3.1 </span>Direct mappings</a></li><li class="tocline"><a href="#prov-refinements" class="tocxref"><span class="secno">3.2 </span>PROV refinements</a></li><li class="tocline"><a href="#complex-mappings" class="tocxref"><span class="secno">3.3 </span>Complex Mappings</a><ul class="toc"><li class="tocline"><a href="#entity-agent-mappings-who" class="tocxref"><span class="secno">3.3.1 </span>Entity-Agent mappings (Who)</a><ul class="toc"><li class="tocline"><a href="#dct-creator" class="tocxref"><span class="secno">3.3.1.1 </span> dct:creator</a></li><li class="tocline"><a href="#dct-contributor" class="tocxref"><span class="secno">3.3.1.2 </span>dct:contributor</a></li><li class="tocline"><a href="#dct-publisher" class="tocxref"><span class="secno">3.3.1.3 </span>dct:publisher</a></li></ul></li><li class="tocline"><a href="#entity-date-mappings-when" class="tocxref"><span class="secno">3.3.2 </span>Entity-Date mappings (When)</a><ul class="toc"><li class="tocline"><a href="#dct-created" class="tocxref"><span class="secno">3.3.2.1 </span> dct:created</a></li><li class="tocline"><a href="#dct-issued" class="tocxref"><span class="secno">3.3.2.2 </span>dct:issued</a></li><li class="tocline"><a href="#dct-modified" class="tocxref"><span class="secno">3.3.2.3 </span>dct:modified</a></li><li class="tocline"><a href="#dct-dateaccepted" class="tocxref"><span class="secno">3.3.2.4 </span>dct:dateAccepted</a></li><li class="tocline"><a href="#dct-datecopyrighted" class="tocxref"><span class="secno">3.3.2.5 </span>dct:dateCopyrighted</a></li><li class="tocline"><a href="#dct-datesubmitted" class="tocxref"><span class="secno">3.3.2.6 </span>dct:dateSubmitted</a></li></ul></li><li class="tocline"><a href="#entity-entity-mappings-how" class="tocxref"><span class="secno">3.3.3 </span>Entity-Entity mappings (How)</a><ul class="toc"><li class="tocline"><a href="#dct-replaces" class="tocxref"><span class="secno">3.3.3.1 </span>dct:replaces</a></li></ul></li></ul></li><li class="tocline"><a href="#cleanup" class="tocxref"><span class="secno">3.4 </span>Cleanup</a></li><li class="tocline"><a href="#list-of-terms-excluded-from-the-mapping" class="tocxref"><span class="secno">3.5 </span>List of terms excluded from the mapping</a></li><li class="tocline"><a href="#mapping-from-prov-to-dc" class="tocxref"><span class="secno">3.6 </span>Mapping from PROV to DC</a></li></ul></li><li class="tocline"><a href="#acknowledgements" class="tocxref"><span class="secno">A. </span>Acknowledgements</a></li><li class="tocline"><a href="#references" class="tocxref"><span class="secno">B. </span>References</a><ul class="toc"><li class="tocline"><a href="#informative-references" class="tocxref"><span class="secno">B.1 </span>Informative references</a></li></ul></li></ul></section>  
+</div><div class="section" id="toc"><h2 class="introductory">Table of Contents</h2><ul class="toc"><li class="tocline"><a href="#introduction" class="tocxref"><span class="secno">1. </span>Introduction</a><ul class="toc"><li class="tocline"><a href="#namespaces-1" class="tocxref"><span class="secno">1.1 </span>Namespaces</a></li><li class="tocline"><a href="#structure-of-this-document" class="tocxref"><span class="secno">1.2 </span>Structure of this document</a></li></ul></li><li class="tocline"><a href="#preliminaries" class="tocxref"><span class="secno">2. </span>Preliminaries</a><ul class="toc"><li class="tocline"><a href="#provenance-in-dublin-core" class="tocxref"><span class="secno">2.1 </span>Provenance in Dublin Core</a></li><li class="tocline"><a href="#entities-in-dublin-core" class="tocxref"><span class="secno">2.2 </span>Entities in Dublin Core</a></li></ul></li><li class="tocline"><a href="#mapping-from-dublin-core-to-prov" class="tocxref"><span class="secno">3. </span>Mapping from Dublin Core to PROV</a><ul class="toc"><li class="tocline"><a href="#direct-mappings" class="tocxref"><span class="secno">3.1 </span>Direct mappings</a></li><li class="tocline"><a href="#prov-refinements" class="tocxref"><span class="secno">3.2 </span>PROV refinements</a></li><li class="tocline"><a href="#complex-mappings" class="tocxref"><span class="secno">3.3 </span>Complex Mappings</a><ul class="toc"><li class="tocline"><a href="#entity-agent-mappings-who" class="tocxref"><span class="secno">3.3.1 </span>Entity-Agent mappings (Who)</a><ul class="toc"><li class="tocline"><a href="#dct-creator" class="tocxref"><span class="secno">3.3.1.1 </span> dct:creator</a></li><li class="tocline"><a href="#dct-contributor" class="tocxref"><span class="secno">3.3.1.2 </span>dct:contributor</a></li><li class="tocline"><a href="#dct-publisher" class="tocxref"><span class="secno">3.3.1.3 </span>dct:publisher</a></li></ul></li><li class="tocline"><a href="#entity-date-mappings-when" class="tocxref"><span class="secno">3.3.2 </span>Entity-Date mappings (When)</a><ul class="toc"><li class="tocline"><a href="#dct-created" class="tocxref"><span class="secno">3.3.2.1 </span> dct:created</a></li><li class="tocline"><a href="#dct-issued" class="tocxref"><span class="secno">3.3.2.2 </span>dct:issued</a></li><li class="tocline"><a href="#dct-modified" class="tocxref"><span class="secno">3.3.2.3 </span>dct:modified</a></li><li class="tocline"><a href="#dct-dateaccepted" class="tocxref"><span class="secno">3.3.2.4 </span>dct:dateAccepted</a></li><li class="tocline"><a href="#dct-datecopyrighted" class="tocxref"><span class="secno">3.3.2.5 </span>dct:dateCopyrighted</a></li><li class="tocline"><a href="#dct-datesubmitted" class="tocxref"><span class="secno">3.3.2.6 </span>dct:dateSubmitted</a></li></ul></li><li class="tocline"><a href="#entity-entity-mappings-how" class="tocxref"><span class="secno">3.3.3 </span>Entity-Entity mappings (How)</a><ul class="toc"><li class="tocline"><a href="#dct-replaces" class="tocxref"><span class="secno">3.3.3.1 </span>dct:replaces</a></li></ul></li></ul></li><li class="tocline"><a href="#cleanup" class="tocxref"><span class="secno">3.4 </span>Cleanup</a></li><li class="tocline"><a href="#list-of-terms-excluded-from-the-mapping" class="tocxref"><span class="secno">3.5 </span>List of terms excluded from the mapping</a></li><li class="tocline"><a href="#mapping-from-prov-to-dc" class="tocxref"><span class="secno">3.6 </span>Mapping from PROV to DC</a></li></ul></li><li class="tocline"><a href="#acknowledgements" class="tocxref"><span class="secno">A. </span>Acknowledgements</a></li><li class="tocline"><a href="#references" class="tocxref"><span class="secno">B. </span>References</a><ul class="toc"><li class="tocline"><a href="#informative-references" class="tocxref"><span class="secno">B.1 </span>Informative references</a></li></ul></li></ul></div>  
    
 
- <section id="introduction">
+ <div class="section" id="introduction">
 
 <!--OddPage-->
 <h2><span class="secno">1. </span>Introduction</h2>
@@ -490,7 +491,7 @@
 	<p></p>
 	
 	<p>
- </p><section id="namespaces-1">
+ </p><div class="section" id="namespaces-1">
 	<h3 id="namespaces"><span class="secno">1.1 </span>Namespaces</h3> 
 	<p>The namespaces used through the document can be seen in <a href="#ns"> Table 2</a> below:
 	 </p><div align="center" id="ns">
@@ -510,9 +511,9 @@
 	  </table>
 	  </div>
 	<p></p>
-	</section>
+	</div>
  
-	<section id="structure-of-this-document">
+	<div class="section" id="structure-of-this-document">
 	<h3><span class="secno">1.2 </span>Structure of this document</h3>
 	<p>
 	<a href="#preliminaries">Section 2</a> explains the main considerations to take into account in order to fully understand the mapping:
@@ -549,10 +550,10 @@
 			</li>
 		</ul>
 	<p></p>
-	</section>
+	</div>
 	
-</section>
-<section id="preliminaries">
+</div>
+<div class="section" id="preliminaries">
 	
 <!--OddPage-->
 <h2><span class="secno">2. </span>Preliminaries</h2>
@@ -563,7 +564,7 @@
 		<li><a href="#entities-in-dublin-core">Section 2.2</a>: The definition of entities in Dublin Core.</li>
 	</ul>
 	<p></p>
-	<section id="provenance-in-dublin-core">
+	<div class="section" id="provenance-in-dublin-core">
     <h3><span class="secno">2.1 </span>Provenance in Dublin Core</h3>
 	<p>
 	DCMI terms hold a lot of provenance information about a resource: <i>when</i> it was affected in the past, 
@@ -685,8 +686,8 @@
 	is kept out of the mapping. 
 	</p>-->
 
-	</section>
-	<section id="entities-in-dublin-core">
+	</div>
+	<div class="section" id="entities-in-dublin-core">
 		<h3><span class="secno">2.2 </span>Entities in Dublin Core</h3>
 		<p>
 		Consider the example metadata record below (<a href="#example1">Example 1</a>), where a document (<code>ex:doc1</code>) is described
@@ -760,10 +761,10 @@
 		Blank nodes are used for the mapping, although any naming mechanism could be provided if necessary,
 		leaving the conflating of nodes to the clean-up phase. 		
 		</p>
-	</section>
-</section>
+	</div>
+</div>
 
-<section id="mapping-from-dublin-core-to-prov"> 
+<div class="section" id="mapping-from-dublin-core-to-prov"> 
 	
 <!--OddPage-->
 <h2><span class="secno">3. </span>Mapping from Dublin Core to PROV</h2>
@@ -778,7 +779,7 @@
 		<li> <a href="#mapping-from-prov-to-dc">Section 3.6</a>: Mapping PROV to Dublin Core (out of the scope of this mapping).</li>
 	</ul>
 	<p></p>
-	<section id="direct-mappings"> 
+	<div class="section" id="direct-mappings"> 
 		<h3><span class="secno">3.1 </span>Direct mappings</h3>
 		<p>
 		The direct mappings relate the DC Terms to the PROV binary relationships by using the integration mechanisms of RDF. 
@@ -1101,8 +1102,8 @@
 		</div>
 		-->
 
-	</section>
-	<section id="prov-refinements"> 
+	</div>
+	<div class="section" id="prov-refinements"> 
 		<h3><span class="secno">3.2 </span>PROV refinements</h3>
 		<p>
 		To properly reflect the meaning of the Dublin Core terms, more specific subclasses are needed:
@@ -1125,8 +1126,8 @@
 		 specific properties are needed, the Dublin Core terms can be used directly, according to the direct mappings presented in 
 		 <a href="#direct-mappings">Section 3.1</a>. 
 		</p>
-	</section>
-	<section id="complex-mappings">
+	</div>
+	<div class="section" id="complex-mappings">
 	<h3><span class="secno">3.3 </span>Complex Mappings</h3>
 		<p>
 		The complex mappings consist of a set of patterns defined to generate qualified PROV statements from Dublin Core statements. This type of qualification may not be
@@ -1135,7 +1136,7 @@
 		The complex mappings are provided in form of SPARQL CONSTRUCT queries, i.e., queries that describe a
 		 resulting RDF graph based on another RDF graph found in the original data. We divide the queries in different categories:
 		 </p>
-		<section id="entity-agent-mappings-who">
+		<div class="section" id="entity-agent-mappings-who">
 			<h4><span class="secno">3.3.1 </span>Entity-Agent mappings (Who)</h4>
 			<p>
 			In this category, we have three terms: <code>dct:contributor</code>, <code>dct:creator</code> and <code>dct:publisher</code>. 
@@ -1157,7 +1158,7 @@
 			 information about the identity of the specializations is available. 
 
 			</p>
-			<section id="dct-creator">
+			<div class="section" id="dct-creator">
 				<h5><span class="secno">3.3.1.1 </span> dct:creator</h5>
 				A creator is the agent in charge of the &quot;Create&quot; activity that generated a specialization of the entity ?document. The agent is assigned the role &quot;creator&quot;.  
 				<pre class="code">  CONSTRUCT {
@@ -1183,8 +1184,8 @@
 	?document dct:creator ?agent.
  }
 				</pre>
-			</section>
-			<section id="dct-contributor">
+			</div>
+			<div class="section" id="dct-contributor">
 				<h5><span class="secno">3.3.1.2 </span>dct:contributor</h5>
 				Contributor is mapped following the previous pattern. Only the roles and activities change:
 				<pre class="code"> CONSTRUCT {
@@ -1210,8 +1211,8 @@
 	?document dct:contributor ?agent .
  }
 				</pre>
-			</section>
-			<section id="dct-publisher">
+			</div>
+			<div class="section" id="dct-publisher">
 				<h5><span class="secno">3.3.1.3 </span>dct:publisher</h5>
 				In case of publication, a second specialization representing the entity before the publication is necessary: 
 				<pre class="code">  CONSTRUCT {
@@ -1243,9 +1244,9 @@
  }
 				</pre>		
 				<p></p>
-			</section>
-		</section>
-		<section id="entity-date-mappings-when">
+			</div>
+		</div>
+		<div class="section" id="entity-date-mappings-when">
 			<h4><span class="secno">3.3.2 </span>Entity-Date mappings (When)</h4>
 			<p>
 			Dates often correspond with a who-property, e.g., creator and created or publisher and issued.
@@ -1256,7 +1257,7 @@
 			 that are <code>xsd:dateTime</code>.
 			</p>
 			
-			<section id="dct-created">
+			<div class="section" id="dct-created">
 				<h5><span class="secno">3.3.2.1 </span> dct:created</h5> 
 				<p></p>
 				<pre class="code"> CONSTRUCT{
@@ -1278,9 +1279,9 @@
   ?document dct:created ?date.
  }
 				</pre>
-			</section>
+			</div>
 	 
-			<section id="dct-issued">
+			<div class="section" id="dct-issued">
 				<h5><span class="secno">3.3.2.2 </span>dct:issued</h5> 
 				<p>
 				</p><pre class="code"> CONSTRUCT{
@@ -1309,8 +1310,8 @@
  }
 				</pre>
 				<p></p>
-			</section>
-			<section id="dct-modified">
+			</div>
+			<div class="section" id="dct-modified">
 				<h5><span class="secno">3.3.2.3 </span>dct:modified</h5> 
 				<p></p><pre class="code"> 
  CONSTRUCT{
@@ -1339,8 +1340,8 @@
  }
 				</pre>
 				<p></p>
-			</section>
-			<section id="dct-dateaccepted">
+			</div>
+			<div class="section" id="dct-dateaccepted">
 				<h5><span class="secno">3.3.2.4 </span>dct:dateAccepted</h5> 
 				<p></p><pre class="code"> 
  CONSTRUCT{
@@ -1369,8 +1370,8 @@
  }
 				</pre>
 				<p></p>
-			</section>
-			<section id="dct-datecopyrighted">
+			</div>
+			<div class="section" id="dct-datecopyrighted">
 				<h5><span class="secno">3.3.2.5 </span>dct:dateCopyrighted</h5> 
 				<p></p><pre class="code">CONSTRUCT{
 	 ?document a prov:Entity .
@@ -1397,8 +1398,8 @@
   ?document dct:dateCopyrighted ?date.
  }
 				</pre><p></p>
-			</section>
-			<section id="dct-datesubmitted">
+			</div>
+			<div class="section" id="dct-datesubmitted">
 				<h5><span class="secno">3.3.2.6 </span>dct:dateSubmitted</h5> 
 				<p></p><pre class="code"> CONSTRUCT{
 	 ?document a prov:Entity .
@@ -1426,11 +1427,11 @@
  }
 				</pre>
 				<p></p>
-			</section>
-		</section>
+			</div>
+		</div>
 
 	
-	<section id="entity-entity-mappings-how">
+	<div class="section" id="entity-entity-mappings-how">
 			<h4><span class="secno">3.3.3 </span>Entity-Entity mappings (How)</h4>
 			<p>
 			In Dublin Core, most of the properties relating entities to other entities don't describe the involvement of a specific activity 
@@ -1438,7 +1439,7 @@
 			The only exception is <code>dct:replaces</code>, further explained below. 
 			 				 
 			</p>
-			<section id="dct-replaces">
+			<div class="section" id="dct-replaces">
 				<h5 id="term_replaces"><span class="secno">3.3.3.1 </span>dct:replaces</h5> 
 				<p>
 				There is a relation between two resources when the former replaces or displaces the latter. The replacement is
@@ -1470,13 +1471,13 @@
   ?document dct:replaces ?document2.
  }
 				</pre><p></p>
-			</section>
+			</div>
 			<p>
 			The term <code>dct:isReplacedBy</code> would produce a similar mapping, inverting the roles of document and document2.
 			</p>
-	</section>
-	</section>
-	<section id="cleanup">
+	</div>
+	</div>
+	<div class="section" id="cleanup">
 	<h3><span class="secno">3.4 </span>Cleanup</h3>
 		<p>
 		The clean-up phase depends on how implementers interpret the described resources. The approach presented in this document 
@@ -1548,8 +1549,8 @@
 		<p>
 		</p>-->
 
-	</section>
-	<section id="list-of-terms-excluded-from-the-mapping">
+	</div>
+	<div class="section" id="list-of-terms-excluded-from-the-mapping">
 		<h3><span class="secno">3.5 </span>List of terms excluded from the mapping</h3>
 		<a href="#list-of-terms-excluded-from-the-mapping"> Table 6</a> lists the terms excluded from the mapping, 
 		either because thay are not suitable or because they don't represent provenance information.
@@ -1736,8 +1737,8 @@
 			</td></tr>
 			</tbody></table>
 		<p></p>
-	</section>
-	<section id="mapping-from-prov-to-dc"> 
+	</div>
+	<div class="section" id="mapping-from-prov-to-dc"> 
 		<h3><span class="secno">3.6 </span>Mapping from PROV to DC</h3>
 			<p>
 			The mapping from PROV to Dublin Core is not part of this note. If the refinements proposed in this document are used, then the inverse of the complex mapping 
@@ -1749,10 +1750,10 @@
 			lies on the broader description of resources. PROV models a provenance chain, but it provides almost no information about the involved 
 			resources themselves. 
 			</p>
-	</section>
-	</section>
+	</div>
+	</div>
 
-	<section class="appendix" id="acknowledgements">
+	<div class="section" class="appendix" id="acknowledgements">
 		
 <!--OddPage-->
 <h2><span class="secno">A. </span>Acknowledgements</h2>
@@ -1760,11 +1761,11 @@
 		This document is the result of a collaboration between the Provenance Working Group and the Dublin Core Metadata Initiative. 
 		The editors extend special thanks to Antoine Isaac, Ivan Herman, Timothy Lebo, Luc Moreau, Paul Groth and Satya Sahoo for their feedback; and MarĂ­a Poveda and Idafen Santana for their help with the HTML generation. 
 	    </p>
-	</section>
+	</div>
 
-<section id="references" class="appendix">
+<div class="section" id="references" class="appendix">
 <!--OddPage-->
-<h2><span class="secno">B. </span>References</h2><section id="informative-references"><h3><span class="secno">B.1 </span>Informative references</h3><dl class="bibliography"><dt id="bib-DCMI">[DCMI]</dt><dd><a href="http://dublincore.org/"><cite>Dublin Core Metadata Initiative</cite></a>. URL: <a href="http://dublincore.org/">http://dublincore.org/</a>
+<h2><span class="secno">B. </span>References</h2><div class="section" id="informative-references"><h3><span class="secno">B.1 </span>Informative references</h3><dl class="bibliography"><dt id="bib-DCMI">[DCMI]</dt><dd><a href="http://dublincore.org/"><cite>Dublin Core Metadata Initiative</cite></a>. URL: <a href="http://dublincore.org/">http://dublincore.org/</a>
 </dd><dt id="bib-DCTERMS">[DCTERMS]</dt><dd><a href="http://dublincore.org/documents/dcmi-terms/"><cite>Dublin Core Terms Vocabulary</cite></a>. 8 December 2010. URL: <a href="http://dublincore.org/documents/dcmi-terms/">http://dublincore.org/documents/dcmi-terms/</a>
 </dd><dt id="bib-OWL2-OVERVIEW">[OWL2-OVERVIEW]</dt><dd>W3C OWL Working Group. <a href="http://www.w3.org/TR/2009/REC-owl2-overview-20091027/"><cite>OWL 2 Web Ontology Language: Overview</cite></a>. 27 October 2009. W3C Recommendation. URL: <a href="http://www.w3.org/TR/2009/REC-owl2-overview-20091027/">http://www.w3.org/TR/2009/REC-owl2-overview-20091027/</a>
 </dd><dt id="bib-PROV-AQ">[PROV-AQ]</dt><dd>Graham Klyne; Paul Groth; eds. <a href="http://www.w3.org/TR/2013/WD-prov-aq-20130312/"><cite>Provenance Access and Query</cite></a>. 12 March 2013, Working Draft. URL: <a href="http://www.w3.org/TR/2013/WD-prov-aq-20130312/">http://www.w3.org/TR/2013/WD-prov-aq-20130312/</a>
@@ -1778,4 +1779,4 @@
 </dd><dt id="bib-PROV-PRIMER">[PROV-PRIMER]</dt><dd>Yolanda Gil; Simon Miles; eds. <a href="http://www.w3.org/TR/2013/WD-prov-primer-20130312/"><cite>PROV Model Primer</cite></a>. 12 March 2013, Working Draft. URL: <a href="http://www.w3.org/TR/2013/WD-prov-primer-20130312/">http://www.w3.org/TR/2013/WD-prov-primer-20130312/</a>
 </dd><dt id="bib-PROV-XML">[PROV-XML]</dt><dd>Hook Hua; Curt Tilmes; Stephan Zednik; eds. <a href="http://www.w3.org/TR/2013/WD-prov-xml-20130312/"><cite>PROV-XML: The PROV XML Schema</cite></a>. 12 March 2013, Working Draft. URL: <a href="http://www.w3.org/TR/2013/WD-prov-xml-20130312/">http://www.w3.org/TR/2013/WD-prov-xml-20130312/</a>
 </dd><dt id="bib-RDFS">[RDFS]</dt><dd>Dan Brickley; Ramanathan V. Guha. RDF Vocabulary Description Language 1.0: RDF Schema. 10 February 2004. W3C Recommendation.URL: <a href="http://www.w3.org/TR/2004/REC-rdf-schema-20040210">http://www.w3.org/TR/2004/REC-rdf-schema-20040210/</a>
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