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Re: Only documents can have a skos:subject?

From: Bernard Vatant <bernard.vatant@mondeca.com>
Date: Fri, 15 Dec 2006 01:00:08 +0100
Message-ID: <4581E588.4030007@mondeca.com>
To: Richard Cyganiak <richard@cyganiak.de>
Cc: public-esw-thes@w3.org

Hi Richard
> Quick question: I suppose that only documents can have a skos:subject? 
> In other words, if I had a foaf:Person ex:Ludwig_Wittgenstein and a 
> skos:Concept taxo:Philosophy, then I could not assert this:
>
>     ex:Ludwig_Wittgenstein skos:subject taxo:Philosophy .
This could maybe do in some closed world, as a quick and dirty road to 
sort authors in your local library against a taxonomy of subjects.
But, in an open world, and especially using foaf:Person, some level of 
indirection is needed.
I guess what you want to say here is that ex:Ludwig_Wittgenstein has 
done works which have some subject which is taxo:Philosophy.
> Any ideas for another way of usefully relating the two resources?

What about something like that :

  <owl:Class rdf:about="Wittgenstein_Philosophy_Works">
    <rdfs:subClassOf rdf:resource="&foaf;Document"/>
    <rdfs:subClassOf>
      <owl:Restriction>
        <owl:hasValue rdf:resource="&taxo;Philosophy"/>
        <owl:onProperty rdf:resource="&skos;subject"/>
      </owl:Restriction>
    </rdfs:subClassOf>
    <rdfs:subClassOf>
      <owl:Restriction>
        <owl:hasValue rdf:resource="#Ludwig_Wittgenstein"/>
        <owl:onProperty rdf:resource="&dc;creator"/>
      </owl:Restriction>
    </rdfs:subClassOf>
  </owl:Class>

Bernard

-- 

*Bernard Vatant
*Knowledge Engineering
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*Mondeca**
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Received on Friday, 15 December 2006 00:00:13 GMT

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