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From: Orri Erling <erling@xs4all.nl>
Date: Tue, 12 May 2009 15:59:24 +0200
Message-Id: <200905121359.n4CDxQE1015515@smtp-vbr7.xs4all.nl>
To: "'John Goodwin'" <John.Goodwin@ordnancesurvey.co.uk>, "'Tim Berners-Lee'" <timbl@w3.org>
Cc: "'Steve Harris'" <steve.harris@garlik.com>, <public-lod@w3.org>, <semantic-web@w3.org>

> - Does anyone have an SPARQL server software which stores a 
> set of triples and queries automatically the (virtual) OWL-x 
> closure of them?  (Ora's Wilbur engine did this with RDFS)
> - If that functionality is done in a federated SPARQL system, 
> do we just expect inference within each server, or can one 
> form some form cross-linking allowing a OWL-aware query of 
> two large separate datasets?

That's an interesting problem...



Virtuoso will optionally query a graph as if subclass, subproperty,
owl:sameAs owl:InverseFunctionalProperty and some other select features were
materialized according to an ontology.

This does not involve materializing the entailed triples, the processing is
done at run time, backward chaining style.  The feature is optional.

Received on Tuesday, 12 May 2009 14:00:11 UTC

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