Re: ACTIO: SKOS concepts and OWL classes

Antoine Isaac wrote:
> Hi Guus,
> 
> Thanks a lot! Most of this text could fit the Primer as such, I think.
> I have however two remarks:

Antoine,

I suggest you and Ed take this text and adapt it in the 
way you see as appropriate for the Primer.

Guus



> 
> 1. When you say
> 
>> OWL Full users will be able to handle the situation above by treating 
>> |skos:Concept| explicitly as a metaclass, e.g. by adding the statement 
>> of the form:
>>     skos:Concept rdfs:subClassOf owl:Class .
>>   
> 
> I feel a bit unconfortable. The starting point of this SKOS/OWL issue is 
> that we want to apply OWL modelling features to SKOS concept 
> individuals, or SKOS modelling features to instances of OWL classes. And 
> because this result (either because of some axiom or because of apriori 
> specification of the type of these entities), we happen to "cross the 
> streams", as Alistair puts it in [1], that is, being outside of OWL-DL.
> But that's to me different from the intention of saying that every 
> skos:Concept is an owl:Class. The statement that you write here creates 
> the same kind of effect as the one saying that skos:broader was 
> transitive, which we wanted to avoid because (among other reasons) it 
> would have messed with non-transitive interpretations of broader.
> 
> 2. Could/Should we had a sentence for the users interested in OWL-DL 
> *and* linking classes to concepts? At the time they read the Primer this 
> metamodelling option in OWL 1.1 could well not exist.
> I could put in the section on "extending SKOS" a brief note on one among 
> the patterns of [1,2] which could help them to solve their problem (e.g. 
> the use of a bridge property such as skos:it or whatever name is 
> convenient). And point to it from your text.
> This would actually enable to extend this topic from "OWL classes" to 
> "entities in the OWL ontologies", including OWL individuals such as 
> instances of foaf:Person. This was one of the motivations for these 
> discussions at the begining, cf. the motivation section in [2] 
> (especially the POWDER case)
> 
> Best,
> 
> Antoine
> 
> [1] 
> http://isegserv.itd.rl.ac.uk/public/skos/2007/10/f2f/skos-owl-patterns.html
> [2] http://www.w3.org/2006/07/SWD/wiki/SkosDesign/ConceptSemantics
> 
>> ACTION: Alistair and Guus write draft section in primer on 
>> relationship between SKOS concepts and OWL classes for OWL DL users 
>> [http://www.w3.org/2008/01/22-swd-minutes.html#action06]
>>
>> Alistair, all,
>>
>> I've written a first draft. See the attached HTML.
>>
>> Guus
>>
>>
> 

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Received on Wednesday, 30 January 2008 15:26:18 UTC