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<H2>Extracting and reifying RDF from XML</H2>

<H3>Serializing RDF and edge labelled graphs in XML</H3>

<P>One of the issues in serializing RDF to XML, and extracting RDF from 

arbitrary or colloquial XML is that the XML object model (DOM) is a node 

labelled graph and the RDF object model forms an edge labelled graph.</P>

<P>Several mechanism have been proposed to simplifiy the RDF syntax: After 

implementing Sergey Melnik's <A href="http://www-db.stanford.edu/~melnik/rdf/syntax.html">simplified RDF 

syntax</A> using Tim Connolly's rdfp.xsl as a base, I have subsequently 

implemented Tim Berniers-Lee's <A href="http://www.w3.org/DesignIssues/Syntax.html">strawman syntax</A>:</P>

<P>"The major difference between this syntax and <A href="http://www.w3.org/TR/REC-rdf-syntax/">RDF 1.0 M&amp;S</A> is that RDF edges correspond to 

elements, and RDF nodes are implicit. It is basically as the M&amp;S syntax with

<CODE>parseType=resource</CODE>is a default."</P>

<P>This proposal, with 

its attendant implementation has the following properties:</P>

<OL>

	<LI>Uses rdf:type='Resource' as default</LI>

	<LI>Does not add to current rdf vocabulary</LI>

	<LI>Implements XLink2RDF proposal (now with extended 

  links)</LI>

	<LI>Implements rdf:aboutEach, rdf collections and bagID</LI>

	<LI>Transforms to &lt;rdf:Statement&gt;&lt;rdf:predicate 

  .../&gt;...&lt;/rdf:Statement&gt; form</LI>

	<LI>Transforms colloqial XML into 

  RDF Statements</LI>

	<LI>*** Transformation of the output of a transformation results in 

  <STRONG>reification</STRONG></LI>

</OL>

<H3>The XSLT implementation</H3>

<P>The current XSLT implementation incorporates Jason Diamond's original <A href="http://injektilo.org/rdf/rdf.xsl">rdf.xsl</A> (nice work!). I have placed a copy at <A href="http://www.openhealth.org/RDF/rdf.xsl">http://www.openhealth.org/RDF/rdf.xsl</A> 

which is &lt;xsl:include&gt;d into the current implementation:</P>

<P>&nbsp;<A href="http://www.openhealth.org/RDF/rdfExtractify.xsl">http://www.openhealth.org/RDF/rdfExtractify.xsl</A></P>

<P>To use, also download <A href="http://www.openhealth.org/RDF/rdf.xsl">http://www.openhealth.org/RDF/rdf.xsl</A> into the same directory</P>

<!--<H4>Try it out</H4>

<form action="http://www.w3.org/2000/06/webdata/xslt" method="GET">

  <input type="hidden" name="xslfile" value="http://www.openhealth.org/RDF/rdfExtractify.xsl" />

  <p>XML or RDF file: <input type="text" name="xmlfile" size="48" /></p>

  <p><input type="submit" value="extractify" /></p>

</form>-->

<P>&nbsp;</P><H3>How to name anonymous class instances?</H3>

<P>In the Melnick proposal, class instances are named by use of the rdf:instance 

attribute. When we indicate that an element maps to a class instance through use 

of the rdf:type instance the member appears anonymous, or is it? As in the 

XLink2RDF proposal, nodes can be named using XPointer fragment identifiers. 

XPointers can be generated from an element using several techniques:</P>

<OL>

	<LI><A href="http://www.w3.org/TR/xptr#bare-names">'Bare names'</A> Value of ID or rdf:ID attribute e.g. #foo</LI>

	<LI><A href="http://www.w3.org/TR/xptr#child-seqs">ChildSeq</A> e.g. #/1/1/1</LI>

	<LI>XPath indices e.g. #xpointer(/foo[1]/bar[2])</LI>

	<LI>XPathattributese.g.#xpointer(/foo[@bar='123']/baz[@bop='whatever'])</LI>

</OL>

<P>An example XML document using simplified RDF syntax</P>

<PRE>&lt;t:person

	rdf:about="http://www.openhealth.org/people/JohnDoe.xml"

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;	xmlns:t="http://www.openhealth.org/types"&gt;

&nbsp;&nbsp;&nbsp; &lt;t:name rdf:type="PersonName"&gt;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

        &lt;t:first&gt;John&lt;/t:first&gt;

	&lt;t:last&gt;Doe&lt;/t:last&gt;

&nbsp;&nbsp;&nbsp; &lt;/t:name&gt;

    &lt;t:pid t:entity="NEMC"&gt;123-45-6789&lt;/t:pid&gt;

&nbsp;&nbsp;&nbsp;&nbsp;&lt;t:SSN&gt;000-11-1234&lt;/t:SSN&gt;

    &lt;t:patient rdf:type="Role"&gt;

    	 &lt;t:primary-care-physician rdf:resource=".../DrJones.xml" /&gt;

    &lt;/t:patient&gt;

    &lt;t:address rdf:type="Address" loc="home"&gt;

      &lt;t:street&gt;750 Washington Street&lt;/t:street&gt;

      &lt;t:city&gt;Boston&lt;/t:city&gt;

      &lt;t:state&gt;MA&lt;/t:state&gt;

    &lt;/t:address&gt;

&lt;/t:person&gt;

</PRE>

<P>And transformed via rdfExtractify:</P>

<P>&lt;rdf:RDF 

xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject 

rdf:resource="http://www.openhealth.org/people/JohnDoe.xml"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/types#person"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.openhealth.org/types#name"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject 

rdf:resource="http://www.openhealth.org/people/JohnDoe.xml"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="#/1/1"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/1"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="PersonName"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.openhealth.org/types#first"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/1"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object&gt;John&lt;/rdf:object&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.openhealth.org/types#last"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/1"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object&gt;Doe&lt;/rdf:object&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.openhealth.org/types#pid"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject 

rdf:resource="http://www.openhealth.org/people/JohnDoe.xml"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="#/1/2"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/2"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/types#pid"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.openhealth.org/types#entity"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/2"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object&gt;NEMC&lt;/rdf:object&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#value"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/2"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object&gt;123-45-6789&lt;/rdf:object&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.openhealth.org/types#SSN"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject 

rdf:resource="http://www.openhealth.org/people/JohnDoe.xml"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object&gt;000-11-1234&lt;/rdf:object&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.openhealth.org/types#patient"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject 

rdf:resource="http://www.openhealth.org/people/JohnDoe.xml"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="#/1/4"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/4"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="Role"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.openhealth.org/types#primary-care-physician"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/4"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/people/DrJones.xml"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject 

rdf:resource="http://www.openhealth.org/people/DrJones.xml"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/types#primary-care-physician"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.openhealth.org/types#address"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject 

rdf:resource="http://www.openhealth.org/people/JohnDoe.xml"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="#/1/5"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/5"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="Address"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="file:/D:/rdf/test.xml#loc"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/5"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object&gt;home&lt;/rdf:object&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.openhealth.org/types#street"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/5"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object&gt;750 Washington Street&lt;/rdf:object&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.openhealth.org/types#city"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/5"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object&gt;Boston&lt;/rdf:object&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.openhealth.org/types#state"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/5"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object&gt;MA&lt;/rdf:object&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&lt;/rdf:RDF&gt;</P>

<P>And the reified result:</P>

<P>&lt;rdf:RDF 

xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/1"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Statement"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/1"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#subject"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/1"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/people/JohnDoe.xml"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#object"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/1"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/types#person"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/2"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Statement"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/2"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/types#name"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#subject"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/2"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/people/JohnDoe.xml"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#object"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/2"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="#/1/1"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/3"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Statement"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/3"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#subject"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/3"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="#/1/1"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#object"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/3"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="PersonName"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; ...</P>

<P>&nbsp;&nbsp; &lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#object"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/13"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/people/DrJones.xml"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/14"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Statement"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/14"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#subject"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/14"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/people/DrJones.xml"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#object"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/14"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/types#primary-care-physician"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/15"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Statement"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/15"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/types#address"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#subject"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/15"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/people/JohnDoe.xml"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#object"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/15"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="#/1/5"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/16"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Statement"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/16"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#subject"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/16"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="#/1/5"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#object"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/16"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="Address"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/17"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Statement"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/17"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="file:/D:/rdf/test.xml#loc"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#subject"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/17"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="#/1/5"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#object"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/17"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object&gt;home&lt;/rdf:object&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/18"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Statement"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/18"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/types#street"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#subject"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/18"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="#/1/5"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#object"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/18"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object&gt;750 Washington Street&lt;/rdf:object&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/19"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Statement"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/19"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/types#city"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#subject"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/19"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="#/1/5"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#object"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/19"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object&gt;Boston&lt;/rdf:object&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#type"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/20"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#Statement"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/20"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object 

rdf:resource="http://www.openhealth.org/types#state"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#subject"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/20"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object rdf:resource="#/1/5"/&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&nbsp;&nbsp; 

&lt;rdf:Statement&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;rdf:predicate 

rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#object"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:subject rdf:resource="#/1/20"/&gt;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 

&lt;rdf:object&gt;MA&lt;/rdf:object&gt;<BR>&nbsp;&nbsp; 

&lt;/rdf:Statement&gt;<BR>&lt;/rdf:RDF&gt;</P>

<P><IMG src="person graph.GIF"></P>

<P>&nbsp;</P>

<P>Comments are welcome</P>

<P>Jonathan Borden</P>

<P><A href="mailto:jonathan@openhealth.org">jonathan@openhealth.org</A></P>

<P>September 21, 2000</P>

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