- From: Enrico Franconi <franconi@inf.unibz.it>
- Date: Tue, 30 Nov 2010 16:22:52 +0100
- To: Bijan Parsia <bparsia@cs.man.ac.uk>
- Cc: Lee Feigenbaum <lee@thefigtrees.net>, SPARQL Working Group <public-rdf-dawg@w3.org>
On 30 Nov 2010, at 16:00, Bijan Parsia wrote: > On 30 Nov 2010, at 14:29, Lee Feigenbaum wrote: > [snip] >> Hi Enrico, >> >> Are there existing implementations of SPARQL that incorporate OWL Direct Semantics in the manner you're proposing? >> >> Bijan, Birte -- do the systems that you're familiar with currently implement SPARQL with OWL Direct Semantics in the manner that's in the current entailment document, or is it not yet implemented at all? > > > I've not checked the exact details of the document recently, but systems which have the semantics that is very close to the current spec (wrt to not supporting non-distinguished variables): > > Racer, KAON2, HermiT, SHER. > Pellet supports limited non-distinguished variables, but many people don't use them. The problem for these OWL2-DL-DS systems is to return bnodes. I would be surprised that anybody would want to hack their systems to actually return bnodes. --e.
Received on Tuesday, 30 November 2010 15:23:26 UTC