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Re: ISSUE-182: Last Call Comment: Index Terms

From: Antoine Isaac <aisaac@few.vu.nl>
Date: Wed, 08 Oct 2008 15:43:59 +0100
Message-ID: <48ECC72F.4030409@few.vu.nl>
To: SWD WG <public-swd-wg@w3.org>

Hi,

Again two cents, quickly.

We had a similar case once. We just did not represent them at the time, 
but if it had been a matter of life or death I would have used (specialization) 
of mapping properties, as Michael proposed.
Another option is to used dc:subject (or a specialization of it) : after 
all indexing of concepts or classes by other concepts or classes can be 
likened to indexing of douments (or general resources) by concepts or 
classes!

Antoine

> ISSUE-182: Last Call Comment: Index Terms
>
> http://www.w3.org/2006/07/SWD/track/issues/182
>
> Raised by: Sean Bechhofer
> On product: SKOS
>
> Raised by Michael Panzer [1]:
>
>
> 2. Index terms
> --------------
>
> An important part of many classification systems is an index, in the
> case of the DDC its "Relative Index". Index terms associated with a
> given class generally reflect several of the topics falling within the
> scope of that class. There is no easy way of modeling this relationship
> in SKOS:
>
> Class/Concept:
> 616 Diseases
>
> Index terms:
>    Clinical medicine
>    Diseases--humans--medicine
>    Illness--medicine
>    Internal medicine
>    Physical illness--medicine
>    Sickness--medicine
>
> Currently, a possible workaround is to construct the complete Relative
> Index as a separate skos:ConceptScheme and relate the concepts in these
> two independent schemes by using mapping relations:
>
> skosclass:hasIndexTerm rdfs:subPropertyOf skos:closeMatch .
>
> skosclass:isIndexTermOf rdfs:subPropertyOf skos:closeMatch ;
>   owl:inverseOf skosclass:hasIndexTerm .
>
> <class/616> a skos:Concept ;
>   skosclass:hasIndexTerm <index/Clinical%20medicine> ;
>   skos:inScheme <classification> .
>
> <index/Clinical%20medicine> a skos:Concept ;
>   skosclass:isIndexTermOf <class/616> ;
>   skos:inScheme <index> .
>
> This seems to be a satisfactory best-practice solution in this case, but
> it has broader implications as index terms are just one instance of 
> Class-Topic Relations
>
>
> [1] http://lists.w3.org/Archives/Public/public-swd-wg/2008Oct/0061.html
>
>
>
>
>
>
>   
Received on Wednesday, 8 October 2008 14:47:58 GMT

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