RE: DBpedia 3.2 release, including DBpedia Ontology and RDF links to Freebase

> John's comment relates to (at least) the axioms on "publisher":
>
> [[
> <owl:ObjectProperty rdf:about="http://dbpedia.org/ontology/publisher">
> <rdfs:label xml:lang="en">publisher</rdfs:label>
>	<rdfs:domain>
>		<owl:Class>
>			<owl:unionOf rdf:parseType="Collection">
>				<owl:Class rdf:about="Work"/>
>				<owl:Class rdf:about="Book"/>
>				<owl:Class rdf:about="Newspaper"/>
>			</owl:unionOf>
>		</owl:Class>
>	</rdfs:domain>
>	<rdfs:range rdf:resource="http://dbpedia.org/ontology/Person"/>
>	<rdfs:range rdf:resource="http://dbpedia.org/ontology/Company"/>
> </owl:ObjectProperty>
> ]]
>
> The semantics of range mean that you have essentially asserted that  
> the range of published is [Person and Company]. If you want the  
> union, you'll have to explicitly use the unionOf constructor here.

Thanks Sean, yup that's the one. There were a few other cases of that elsewhere as well. This is also a good example of where (IMHO) the domain was perhaps over specified. For example all sorts of things could have publishers, and not the ones listed here. I worry that if you reuse DBpedia "publisher" elsewhere you could get some undesired inferences.

cheers,

John
.


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Received on Monday, 17 November 2008 17:21:49 UTC