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RE: Multiple URIs, same resource, then what?

From: Danny Ayers <danny666@virgilio.it>
Date: Sun, 13 Apr 2003 20:00:51 +0200
To: <jimbobbs@hotmail.com>, <www-rdf-interest@w3.org>
Message-ID: <BKELLDAGKABIOCHDFDBPCEIMCHAA.danny666@virgilio.it>

I believe within RDF you can only merge to produce two sets of statements:

  <rdf:Description
    rdf:about="http://www.w3.org/TR/html4/strict.dtd"
    dc:creator="Dave Raggett"
    dc:creator="Arnaud Le Hors"
    dc:creator="Ian Jacobs"
    dc:publisher="World Wide Web Consortium" />

  <rdf:Description
    rdf:about="urn:publicid:-:W3C:DTD+HTML+4.01:EN"
    dc:creator="Dave Raggett"
    dc:creator="Arnaud Le Hors"
    dc:creator="Ian Jacobs"
    dc:publisher="World Wide Web Consortium" />

but if you step up to OWL you could use owl:sameIndividualAs (or
owl:equivalentTo)

  <rdf:Description
    rdf:about="http://www.w3.org/TR/html4/strict.dtd"
    dc:creator="Dave Raggett"
    dc:creator="Arnaud Le Hors"
    dc:creator="Ian Jacobs"
    dc:publisher="World Wide Web Consortium">
 <owl:sameIndividualAs rdf:resource="urn:publicid:-:W3C:DTD+HTML+4.01:EN" />
 </rdf:Description>

(or vice versa)

so the graph is pretty dull really - just another property hanging off the
resource.

Cheeers,
Danny.



> -----Original Message-----
> From: www-rdf-interest-request@w3.org
> [mailto:www-rdf-interest-request@w3.org]On Behalf Of Jimmy Cerra
> Sent: 13 April 2003 19:40
> To: www-rdf-interest@w3.org
> Subject: Q: Multiple URIs, same resource, then what?
>
>
>
> RDF uses a URI to identify a resource.  Well, what happens if we have a
> single resource identified by two different URIs.  For example, say both
> the following URIs identifies a particular DTD:
>
> [1] http://www.w3.org/TR/html4/strict.dtd
> [2] urn:publicid:-:W3C:DTD+HTML+4.01:EN
>
> Also, say we have two RDF documents:
>
> [3] <rdf:RDF
>   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
>   xmlns:dc="http://purl.org/dc/elements/1.0/">
>
>   <rdf:Description
>     rdf:about="http://www.w3.org/TR/html4/strict.dtd"
>     dc:creator="Dave Raggett"
>     dc:creator="Arnaud Le Hors"
>     dc:creator="Ian Jacobs" />
>
> </rdf:RDF>
>
> [4] <rdf:RDF
>   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
>   xmlns:dc="http://purl.org/dc/elements/1.0/">
>
>   <rdf:Description
>     rdf:about="urn:publicid:-:W3C:DTD+HTML+4.01:EN"
>     dc:publisher="World Wide Web Consortium" />
>
> </rdf:RDF>
>
> Well, if the two RDF graphs are merged, then what would the resulting
> graph look like?  Both describe the same (addressable) resource;
> however, they have different URIs.  I am a little confused.
>
> --
> James F. Cerra
>
Received on Sunday, 13 April 2003 14:02:39 GMT

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