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SKOS and OWL - set based constructs

From: Miles, AJ (Alistair) <A.J.Miles@rl.ac.uk>
Date: Thu, 27 Nov 2003 13:54:15 -0000
Message-ID: <350DC7048372D31197F200902773DF4C04944028@exchange11.rl.ac.uk>
To: "'ewallace@cme.nist.gov'" <ewallace@cme.nist.gov>
Cc: "'www-rdf-interest@w3.org'" <www-rdf-interest@w3.org>

The idea is that the skos-mapping constructs are a more convenient and
intuitive shorthand for more formal set based constructs that could be
expressed in OWL. 

So for example, you may consider that statements such as ...

<soks:Concept rdf:about="#A">
	<soks-map:broaderMatch>
		<soks-map:AND>
			<rdf:li rdf:resource="#B"/>
			<rdf:li rdf:resource="#C"/>
		</soks-map:AND>
	</soks-map:broaderMatch>
</soks:Concept>

... are in fact a convenient shorthand for the statements ...

<owl:Restriction> 
   <owl:onProperty rdf:resource="&dc;subject"/> 
   <owl:hasValue rdf:resource="#A"/> 
   <rdfs:subClassOf rdf:parseType="resource"> 
      <owl:intersectionOf rdf:parseType="collection"> 
         <owl:Restriction> 
            <owl:onProperty rdf:resource="&dc;subject"/> 
            <owl:hasValue rdf:resource="#B"/> 
         </owl:Restriction> 
         <owl:Restriction> 
            <owl:onProperty rdf:resource="&dc;subject"/> 
            <owl:hasValue rdf:resource="#C"/> 
         </owl:Restriction> 
      </owl:intersectionOf> 
   </rdfs:subClassOf> 
</owl:Restriction> 

For further discussion of this problem, see the extended writeup of open
design issues on the SWAD RDF Thesaurus wiki (Issue 9 - Inter-thesaurus
mapping) <http://esw.w3.org/topic/RdfThesaurus>.

What do you think of this?

Yours,

Alistair.


> -----Original Message-----
> From: ewallace@cme.nist.gov [mailto:ewallace@cme.nist.gov]
> Sent: 26 November 2003 18:59
> To: A.J.Miles@rl.ac.uk
> Subject: Re: SKOS-Mapping comments and labels added
> 
> 
> 
> You wrote:
> 
> >Comments and labels have been added to the SKOS-Mapping vocabulary.
> >
> ><http://www.w3c.rl.ac.uk/2003/11/21-skos-mapping>
> 
> This file contains AND, OR, and NOT properties which mimic OWL
> vocabulary elements: owl:intersectionOf, owl:unionOf, and 
> owl:complementOf respectively.  Why invent new terms?
> 
> -Evan
> 
> Evan K. Wallace
> Manufacturing Systems Integration Division
> NIST
> 
> 
Received on Thursday, 27 November 2003 08:54:20 GMT

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