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RE: Need advice on using same URI for SKOS and FOAF descriptions

From: Houghton,Andrew <houghtoa@oclc.org>
Date: Thu, 10 Dec 2009 08:34:49 -0500
Message-ID: <6548F17059905B48B2A6F28CE3692BAA05BD6919@OAEXCH4SERVER.oa.oclc.org>
To: <public-esw-thes@w3.org>
> From: Simon Cox [mailto:simon.cox@jrc.ec.europa.eu]
> Sent: Thursday, December 10, 2009 02:55 AM
> Subject: RE: Need advice on using same URI for SKOS and FOAF
> descriptions
> 
> Why 'equivalentClass'?
> Surely a person is an individual!? (cue quotes from Life of Brian).
>
> From: public-esw-thes-request@w3.org [mailto:public-esw-thes-
> request@w3.org]
> On Behalf Of Houghton,Andrew
> Sent: Friday, 4 December 2009 18:26
> Subject: RE: Need advice on using same URI for SKOS and FOAF
> descriptions
> 
> I thought about this last night and a possible solution might be to do
> something like:
> 
> <rdf:RDF>
>   <foaf:Person rdf:about="http://example.org/person/1#foaf">
>     <foaf:name>person 1</foaf:name>
>     <dc:date>1995</dc:date>
>     <owl:equivalentClass rdf:resource="http://example.org/person/1" />
>   </foaf:Person>
>   <skos:Concept rdf:about="http://example.org/person/1#skos">
>     <skos:prefLabel>person 1</skos:prefLabel>
>     <dc:date>1996</dc:date>
>     <owl:equivalentClass rdf:resource="http://example.org/person/1" />
>   </skos:Concept>
> </rdf:RDF>

Even this approach doesn't meet the sniff test.  The property 
owl:equivalentClass is defined as two classes that contain
exactly the same set of individuals.  In the above RDF the 
class of all foaf:Person individuals does not contain the 
same set of individuals as the class of all skos:Concept.  A 
skos:Concept could be a person, but it could also be a place, 
topic, event, etc.  Hence owl:equivalent class doesn't apply.  

We have abandoned the use of owl:equivalentClass and instead 
have decided to use dcterms:source to indicate that the 
foaf:Person and skos:Concept are derived from the owl:Thing 
<http://example.org/person/1>.


Andy.
Received on Thursday, 10 December 2009 13:35:19 UTC

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