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Hi Francois-Paul:

On Jan 26, 2013, at 7:59 AM, François-Paul Servant wrote:

> In http://www.productontology.org/#faq
> I read:
> "DBpedia URIs cannot be used for modeling the type of real-world objects, in particular in the context of the GoodRelations ontology, because
> - they lack a suitable semantics for being used as classes, and
> - they are not valid OWL DL."
> 
> In http://www.heppnetz.de/ontologies/vso/ns#feature
> the comment about vso:feature says:
> "Use DBPedia resources to indicate the features, if possible."
> 
> I don't see what they should be a difference between a product and a feature of a product wrt their modeling
> 
> If it is bad to say that foo:mySolderingIron rdf:type dbPedia:Soldering_iron
> it must also be bad to say that
> foo:myRegulatedAirConditioner rdf:type dbPedia:Air_conditioner

The answer is simply, yet it may not obvious, so thanks for the question:

You can (and should) use suitable DBPedia URIs for *instances* (individuals), but not for *classes* (types).

All examples in the Vehicle Sales Ontology (http://purl.org/vso/ns) and other GoodRelations extensions say that you should rather use DBPedia URIs for instances of predefined value *types*.

Example:

VSO defines

    http://purl.org/vso/ns#BodyStyleValue

as the range for 

    http://purl.org/vso/ns#bodyStyle

You can use

    http://dbpedia.org/resource/Convertible
    http://dbpedia.org/resource/Hatchback
    http://dbpedia.org/resource/Station_wagon
    http://dbpedia.org/resource/Sport_utility_vehicle
    http://dbpedia.org/resource/Roadster

as a value for that property, in statements like

foo:myCar vso:bodyStyle <http://dbpedia.org/resource/Convertible> .

An OWL/RDF reasoner will infer then that

<http://dbpedia.org/resource/Convertible> rdf:type vso:BodyStyleValue

which is perfectly fine.

Hope that helps!

Best
Martin

> 
> 
> Best,
> 
> fps
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--------------------------------------------------------
martin hepp
e-business & web science research group
universitaet der bundeswehr muenchen

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This is the archive of the goodrelations dicussion list

[goodrelations] vso:feature, dpPedia and productontology