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Re: Concept Schemes hierarchies

From: Antoine Isaac <aisaac@few.vu.nl>
Date: Sun, 30 Dec 2012 12:19:38 +0100
Message-ID: <50E0234A.1030408@few.vu.nl>
To: <public-esw-thes@w3.org>
Hi Juan,

There has been suggestions like these in the past, already.
The problem with your pattern (using skos:inScheme between ConceptSchemes) is that skos:inScheme has skos:Concept as domain and skos:ConceptScheme as range. This would cause "sub-schemes" like S11 to be infered to be instances of skos:Concept, which is probably not something you want.

The cleanest option may be to create a new property, like ex:subSchemeOf. Properties like ISO's iso-thes:microThesaurusOf [1] or madsrdf:isMemberOfMADSCollection [2] may fit, this remains to be investigated (I'm afraid especially that these are mostly used with sub-class of skos:Collection, not skos:ConceptScheme).

Note that coining a new property could still allow the kind of inference you describe below (<C1> skos: inScheme <S1>). The trick is to use an OWL property chain axiom [3] stating that the chain (skos:inScheme, ex:subSchemeOf) is a sub-property of skos:inScheme.

Antoine

[1] http://www.niso.org/schemas/iso25964/correspondencesSKOS/
[2] http://www.loc.gov/standards/mads/rdf/v1.html#isMemberOfMADSCollection
[3] http://www.w3.org/TR/2009/WD-owl2-primer-20090421/#Property_Chains


> Hello everyone,
>
> Recurrently some messages in this list concerning the implementation with SKOS of thesauri formed by several microthesauri Thesauri [1]
>
> Some KOS as EUROVOC define specific properties to represent this. The use of properties such as dc:isPartOf or developing artifacts is another approaches.
>
> Considering only skos:inScheme: is it possible to use this property to define hierarchies of concept schemes?
>
> Example: two concept schemes and <S1> and <S11>, <S1> represents the whole thesaurus and <S11> a microthesaurus. It could be defined:
>
> <S11> skos:inScheme <S1>
>
> Certainly this is consistent with the definition of skos:inScheme in [2] and [3].
>
> In this case, could be usefull define skos:inSheme as transitive (skos:inScheme rdf:type owl:Transitive Property). Thus, having a <C1> concept and the declaration:
>
> <C1> skos: inScheme <S11>
>
> could be inferred that:
>
> <C1> skos: inScheme <S1>
>
> Best regards,
> Juan
>
>
> [1] http://lists.w3.org/Archives/Public/public-esw-thes/2010Jun/0010.html
> [2] http://www.w3.org/TR/skos-reference/#L1101
> [3] http://www.w3.org/TR/skos-reference/#L2805
>
>
> --
> Juan Antonio Pastor Sánchez, Ph.D.
> Dep. of Information and Documentation
> Faculty of Communication and Documentation
> University of Murcia
> phone: +34 868 88 7252
> http://webs.um.es/pastor
> pastor@um.es <mailto:pastor@um.es>
Received on Sunday, 30 December 2012 11:20:08 GMT

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