- From: Charles McCathieNevile <charles@w3.org>
- Date: Sat, 21 Feb 2004 12:29:30 -0500 (EST)
- To: "Cayzer, Steve" <Steve.Cayzer@hp.com>
- Cc: "'Miles, AJ (Alistair) '" <A.J.Miles@rl.ac.uk>, "'public-esw-thes@w3.org'" <public-esw-thes@w3.org>
Hmm. I prefer the idea of being able to say thhat a concept is a member of a thesauraus or (the reason why I prefer this over the subclassing Concept approach) of several thesauri. One relevant use case here is the WWAAC thing which I will write about in a minute as a trip report - where a handful of concepts are likely to find their way into a number of different thesauri and it seems more useful not to have lots and lots of "sameindividual things floating around to make the system work. Cheers Chaals On Sat, 21 Feb 2004, Cayzer, Steve wrote: > >Right. That makes sense, although my allergic reaction to rdfs:isDefinedBy >is not as pronounced as yours :) I could live with it. But I agree that (3) >is elegant and useful. > >Steve >> -----Original Message----- >> From: Miles, AJ (Alistair) [mailto:A.J.Miles@rl.ac.uk] >> Sent: 20 February 2004 12:00 >> To: 'Steve Cayzer'; public-esw-thes@w3.org >> Subject: RE: SKOS-Core 1.0 issues: representing thesaurus >> membership for a con cept >> >> >> The thing is I'm not totally clear on exactly how >> rdfs:isDefinedBy should be used. >> >> The following excerpt comes from [1] : >> >> -------------------- >> rdfs:isDefinedBy is an instance of rdf:Property that is used >> to indicate a resource >> defining the subject resource. This property may be used to >> indicate an RDF vocabulary in which a resource is described. >> -------------------- >> >> What I want is a property that says 'concept X is a member of >> concept-scheme Y'. >> >> So I'm not sure if rdfs:isDefinedBy is appropriate? >> >> P.s. I slept on it and now I'm tending towards option (3) - >> create a subclass of skos:Concept for each concept scheme >> (mainly because of consistency with DCQ). >> >> Al. >> >> [1] http://www.w3.org/TR/2004/REC-rdf-schema-20040210/#ch_isdefinedby >> >> -----Original Message----- >> From: Steve Cayzer [mailto:steve.cayzer@hp.com] >> Sent: 19 February 2004 20:49 >> To: Miles, AJ (Alistair) ; public-esw-thes@w3.org >> Subject: Re: SKOS-Core 1.0 issues: representing thesaurus >> membership for a con cept >> >> >> I'm missing something. Can you explain why (1) is ambiguous >> and misleading? >> >> Cheers >> >> Steve >> ----- Original Message ----- >> From: "Miles, AJ (Alistair) " <A.J.Miles@rl.ac.uk> >> To: <public-esw-thes@w3.org> >> Sent: Thursday, February 19, 2004 5:01 PM >> Subject: SKOS-Core 1.0 issues: representing thesaurus >> membership for a con cept >> >> >> > >> > Hi, >> > >> > This is an outstanding issue, which needs to be resolved before an >> SKOS-Core >> > 1.0 release. >> > >> > It is clear that it is necessary to have some way of stating that a >> concept >> > is a member of a particular thesaurus (conceptual scheme). By what >> > mechanism do we do this? >> > >> > Options: >> > >> > 1. Use rdfs:isDefinedBy >> > >> > 2. Create a new (more specific than rdfs:isDefinedBy) property e.g. >> > skos:inScheme >> > >> > 3. For each scheme (thesaurus) define a subclass of the >> skos:Concept >> class >> > >> > Argument: >> > >> > (1) is not specific to this need, and overloading it could cause >> > confusion and ambiguity. >> > (2) is potentially easiest to understand. >> > (3) is more consistent with the qualified DC in RDF approach to >> representing >> > subject schemes [1]. >> > >> > I'm tempted to go with (2) for now and add a property to SKOS-Core >> > <skos:inScheme> for the 1.0 release. >> > >> > Any thoughts on choosing this option, or the name of the property >> > itself? (I didn't suggest something like <skos:inThesaurus> because >> > I'm trying to keep SKOS slightly more generic than just thesauri.) >> > >> > Al. >> > >> > [1] http://dublincore.org/documents/dcq-rdf-xml/ >> > >> > Charles McCathieNevile http://www.w3.org/People/Charles tel: +61 409 134 136 SWAD-E http://www.w3.org/2001/sw/Europe fax(france): +33 4 92 38 78 22 Post: 21 Mitchell street, FOOTSCRAY Vic 3011, Australia or W3C, 2004 Route des Lucioles, 06902 Sophia Antipolis Cedex, France
Received on Saturday, 21 February 2004 12:29:34 UTC