- From: Miles, AJ (Alistair) <A.J.Miles@rl.ac.uk>
- Date: Thu, 19 Aug 2004 18:48:32 +0100
- To: "'public-esw-thes@w3.org'" <public-esw-thes@w3.org>
See original requirement <http://lists.w3.org/Archives/Public/public-esw-thes/2004Aug/0028.html>. This one of the strongest requirements as yet not supported by SKOS Core, so I thought I'd try to move this along by making a concrete proposal. This proposal seems very vocab heavy (i.e. lots of new constructs) so feel free to shoot this down, or come back with some better names for the suggested constructs. I went this way mainly because of a general lack of enthusiasm for rdf:Bag and rdf:Seq on the part of RDF folks ... a full discussion of the issues and options is at <http://esw.w3.org/topic/SkosDev/SkosCore/CollectionsAndArrays>. Proposal for RDF vocab for representing 'arrays' ----------------------------------------------- Add the following class: skos:Collection. Add the following properties: skos:members (domain skos:Collection, range rdf:List) skos:length (domain skos:Collection, range xsd:Integer) skos:ordered (domain skos:Collection, range xsd:boolean) skos:viewUnder (domain skos:Collection, range skos:Concept) skos:inCollection (domain skos:Concept, range skos:Collection) ------------------------------------- So these to be used to represent e.g. Aircraft <Aircraft by function> Test aircraft Fighter Bomber ... as follows ... <rdf:RDF xml:base="http://example.org/" xmlns: ... etc.> <skos:Concept rdf:about="A"> <skos:prefLabel>Aircraft</skos:prefLabel> </skos:Concept> <skos:Concept rdf:about="A1"> <skos:prefLabel>Test aircraft</skos:prefLabel> <skos:broader rdf:resource="A"/> <skos:inCollection rdf:resource="COL1"/> </skos:Concept> <skos:Concept rdf:about="A2"> <skos:prefLabel>Fighter</skos:prefLabel> <skos:broader rdf:resource="A"/> <skos:inCollection rdf:resource="COL1"/> </skos:Concept> <skos:Concept rdf:about="A3"> <skos:prefLabel>Bomber</skos:prefLabel> <skos:broader rdf:resource="A"/> <skos:inCollection rdf:resource="COL1"/> </skos:Concept> <skos:Collection rdf:about="COL1"> <rdfs:label>Aircraft by function</rdfs:label> <skos:members rdf:parseType="Collection"> <skos:Concept rdf:about="A1"/> <skos:Concept rdf:about="A2"/> <skos:Concept rdf:about="A3"/> </skos:members> <skos:length>3</skos:length> <skos:viewUnder rdf:resource="A"/> <skos:ordered>false</skos:ordered> </skos:Collection> </rdf:RDF> -------------------------------- N.B. other possible names for 'skos:Collection' are 'skos:Array' or 'skos:Group'. I went for 'skos:Collection' here because I'd like a general concept collection construct, that can be used elsewhere, e.g. in SKOS Mapping also to build mapping targets. Anyway, for your consideration. Al. --- Alistair Miles Research Associate CCLRC - Rutherford Appleton Laboratory Building R1 Room 1.60 Fermi Avenue Chilton Didcot Oxfordshire OX11 0QX United Kingdom Email: a.j.miles@rl.ac.uk Tel: +44 (0)1235 445440
Received on Thursday, 19 August 2004 17:49:03 UTC