Hi Bernard,

(cc-ed )

On 4/1/2011 5:07 PM, Bernard Vatant wrote:
But at http://dbpedia.org/ontology/ itself I get

@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
<http://dbpedia.org/ontology/>    rdf:type    owl:Ontology ;
     owl:versionInfo "Version 3.5"@en .

Missing a triple such as

<http://dbpedia.org/ontology/>    rdfs:isDefinedBy    foo

I've got at least a version number :)

So where is the RDF file containing the whole ontology?

[1] references [2], which is a zipped file of the DBPedia Ontology.

However, you are absolutely right, re. Linked Data publishing principles it might beneficial if, e.g.,

curl -H "Accept: application/rdf+xml" http://dbpedia.org/ontology/

or

curl -H "Accept: application/rdf+xml" http://dbpedia.org/ontology/Person

would resolve to a RDF/XML serialized description. It is a basic requirement especially re. Semantic Web ontology deployment to serve semantic graphs in different serializations formats. You are also right re. the application of rdfs:isDefinedBy for universals that are part of this ontology.

Cheers,


Bob


[1] http://wiki.dbpedia.org/Ontology
[2] http://downloads.dbpedia.org/3.6/dbpedia_3.6.owl.bz2

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