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Re: [SKOS] ISSUE-83 semantics of scheme containment properties

From: Antoine Isaac <aisaac@few.vu.nl>
Date: Sat, 26 Jul 2008 00:44:18 +0200
Message-ID: <488A5742.802@few.vu.nl>
To: Alistair Miles <alistair.miles@zoo.ox.ac.uk>
CC: public-swd-wg@w3.org

Hi Alistair,

I agree that the first solution you propose makes the trick from a 
semantic perspective. But I don't like having an extra vocabulary 
element just for this...

I had actually written [1] to look a bit like the general entailments of 
the SKOS Reference, thinking that we could  just have:
> ex:cs skos:hasTopConcept ex:c.
> entails
> ex:c skos:inScheme ex:cs

Otherwise I think you can indeed introduce a non-named property in an 
OWL axiom, like (hoping I'm not making any mistake...)

skos:hasTopconcept rdfs:subPropertyOf [ a owl:ObjectProperty; 
owl:inverseOf skos:inScheme .] .

Again, I would definitively favor one of these two options over 
introducing a new property.



[1] http://lists.w3.org/Archives/Public/public-swd-wg/2008May/0068.html

> Hi Antoine,
> I'm just trying to figure out how to implement the resolution [1] to
> issue 83 [2] in the SKOS reference.
> The most obvious way is to introduce a new property, called something
> like skos:topConceptInScheme, and introduce two new statements into the
> SKOS data model, that skos:topConceptInScheme is a sub-property of
> skos:inScheme, and that skos:topConceptInScheme is the inverse of
> skos:hasTopConcept.
> Another way would be to avoid introducing any new properties, and to
> include a new statement in the data model, something like, "the inverse
> of skos:hasTopConcept is a sub-property of skos:inScheme", or "if a
> scheme has a top concept, then the top concept is in that scheme",
> or ... ?
> At the moment I favour the first approach. It has an obvious meaning in
> terms of RDFS/OWL. The second approach has no obvious translation in
> RDFS/OWL, and is difficult to word.
> What do you think?
> Cheers,
> Al. 
> [1] http://lists.w3.org/Archives/Public/public-swd-wg/2008May/0068.html
> [2] http://www.w3.org/2006/07/SWD/track/issues/83
Received on Friday, 25 July 2008 22:44:52 UTC

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