- From: Dan Brickley <danbri@danbri.org>
- Date: Mon, 12 Nov 2012 13:40:34 +0000
- To: François-Paul Servant <francois-paul.servant@noos.fr>
- Cc: SKOS <public-esw-thes@w3.org>
On 12 November 2012 12:25, François-Paul Servant <francois-paul.servant@noos.fr> wrote: > people seem to agree to keep SKOS concepts and "real world things" (such as those identified by dbPedia URIs) in separate spaces: dbPedia:Michelle_Obama is not a skos:Concept. > > What property should be used to link a SKOS concept to the corresponding "real world thing"? > One suggestion in the thread is to use umbel:linksEntity. Is there agreement on a given property? We added a 'focus' property to the FOAF spec for such situations; details at http://xmlns.com/foaf/spec/#term_focus " Property: foaf:focus focus - The underlying or 'focal' entity associated with some SKOS-described concept. Status:testing Domain:having this property implies being a Concept Range:every value of this property is a Thing" "The focus property relates a conceptualisation of something to the thing itself. Specifically, it is designed for use with W3C's SKOS vocabulary, to help indicate specific individual things (typically people, places, artifacts) that are mentioned in different SKOS schemes (eg. thesauri). W3C SKOS is based around collections of linked 'concepts', which indicate topics, subject areas and categories. In SKOS, properties of a skos:Concept are properties of the conceptualization (see 2005 discussion for details); for example administrative and record-keeping metadata. Two schemes might have an entry for the same individual; the foaf:focus property can be used to indicate the thing in they world that they both focus on. Many SKOS concepts don't work this way; broad topical areas and subject categories don't typically correspond to some particular entity. However, in cases when they do, it is useful to link both subject-oriented and thing-oriented information via foaf:focus. FOAF's focus property works alongside its other topic-oriented constructs: topic, primaryTopic are used when talking about the topical emphasis of a document. The notion of primaryTopic is particularly important in FOAF as it provides an indirect mechanism for identifying things indirectly. A similar approach is explored by the TDB URI scheme. FOAF includes topic-oriented functionality to address its original goals of linking people to information, as well as to other people, through the use of linked information." > Are SKOS concepts to be considered as "Non Information Resource"? (and must we therefore use 303-redirect for SKOS concepts identified by slash URIs?) The word "concept" seems to imply that they are. (I don't think or talk in those terms, personally; is 'Hamlet' an information resource? or the Bible? Or the London tube map? does it matter?) Dan
Received on Monday, 12 November 2012 13:40:56 UTC