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SPARQL over OWL DL

From: Bijan Parsia <bparsia@isr.umd.edu>
Date: Wed, 2 Nov 2005 03:10:09 -0500
Message-Id: <81bb86c99d3801aad2e50574fb942924@isr.umd.edu>
To: RDF Data Access Working Group <public-rdf-dawg@w3.org>

I just wanted to give some pointers to SPARQL over OWL DL  
implementation experience. Evren Sirin recently released a new beta of  
Pellet which now (thanks Andy) has SPARQL query support:
	http://lists.mindswap.org/pipermail/pellet-devel/2005-November/ 
000425.html

Some performance stats (no comparison with KAON2 yet, but Boris is  
going to release some stats soon as he's working on a paper):
	http://www.mindswap.org/2003/pellet/performance.shtml

KAON2 also now has SPARQL support (and since it has limited SWRL  
support, though much more than Pellet, we have query over SWRL):
	http://kaon2.semanticweb.org/

These both are focused on conjunctive instance conjunctive query, so no  
property variables and no (or limited) "schema" queries. With the new  
semantics I expect the former to be lifted some.

RacerPro supports its own query language nRQL, but I expect they will  
add sparql support at some point (and I shall encourage them :)):
	http://www.racer-systems.com/products/racerpro/features.phtml

I know we will support the SPARQL protocol, both raw HTTP and SOAP. I  
will encourage KAON2 and RacerPro to do so as well.

Cheers,
Bijan.
Received on Wednesday, 2 November 2005 08:10:18 GMT

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