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Re: RE : [ISSUE-77] [ISSUE-48] Re: [Dbpedia-discussion] Skos subject properties are deprecated

From: Bernard Vatant <bernard.vatant@mondeca.com>
Date: Fri, 25 Jan 2008 19:27:38 +0100
Message-ID: <479A2A1A.3000308@mondeca.com>
To: Leonard Will <L.Will@willpowerinfo.co.uk>
Cc: public-esw-thes@w3.org

Leonard
>> I would live with skos:indexingConcept
>
> That seems reasonable, but I wonder whether this is within the scope 
> of SKOS anyway.
Good question.
> As far as I know, SKOS is a format for representing knowledge 
> organisation schemes. These schemes are usually independent of any 
> specific resources which they may be used to organise, so I don't see 
> that SKOS should be providing for records of resources.
I see your point, and I agree there again in theory only. In a closed 
world, say a library or enterprise documentation system, I guess you're 
right. SKOS will be used to organize the KOS, and diverse applications 
will use it at will, using certainly various indexing pointers. But if 
you want to federate all that in an open world and ask "how is this 
concept used, by all means" (e.g., on the Web)? If you have a generic 
pointer, the query is much simpler to write. My view on that would be to 
define skos:indexingConcept as a generic and "abstract" property, with 
recommendation to use specific subproperties (such as dc:subject, for 
instance).
> If you build a catalogue or database of resources, you make that 
> searchable by adding indexing terms as metadata to each resource 
> record. These terms may be copied into the catalogue record, or may 
> take the form of links to a thesaurus or other knowledge organisation 
> scheme, but I see this as being a function of the database, not 
> something that is held in the KOS.
In this case define only skos:indexingConcept and its subproperties, not 
the inverse property. In Mondeca ITM, when you are in a workspace using 
a given concept, on the concept "page" you have a magic button "See 
indexed topics", which triggers a query retrieving all resources 
pointing to the concept in the data base, whatever the pointer. So, well 
it's an implementation feature of the data base, right.
> We need to see the boundary between a scheme for organising knowledge 
> concepts and a scheme for cataloguing "documents" or resources.
Not sure SKOS should make this distinction, and I'm not sure I make it 
clearly myself. What is the point of organizing concepts, if not for 
organizing resources? I would even say, pardon me it's Friday evening, 
what is the point of defining a concept at all, if not for cataloguing 
things?

Have a nice week-end

Bernard

-- 

*Bernard Vatant
*Knowledge Engineering
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*Mondeca**
*3, citÚ Nollez 75018 Paris France
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Mail:     bernard.vatant@mondeca.com <mailto:bernard.vatant@mondeca.com>
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Received on Friday, 25 January 2008 18:27:55 GMT

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