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[LC response] To Maurizio Lenzerini, Diego Calvanese, Giuseppe De Giacomo, Riccardo Rosati - LC comment on OWL 2 QL

From: Uli Sattler <sattler@cs.man.ac.uk>
Date: Wed, 25 Mar 2009 18:26:29 +0000
Message-Id: <AD972ED0-0AFA-4C7B-A095-692A26CEC544@cs.man.ac.uk>
To: Maurizio Lenzerini <lenzerini@dis.uniroma1.it>, Diego Calvanese <calvanese@inf.unibz.it>, Guiseppe De Giacomo <degiacomo@dis.uniroma1.it>, Riccardo Rosati <Riccardo.Rosati@dis.uniroma1.it>
Cc: public-owl-comments@w3.org
Dear Maurizio, Diego, Giuseppe and Riccardo,

Thank you for your comment
on the OWL 2 Web Ontology Language last call drafts.

Your comment is closely related to the one by Misha (see http://lists.w3.org/Archives/Public/public-owl-comments/2009Jan/0019.html) 
  and Ivan (see http://www.w3.org/mid/49881F19.7040209@w3.org).

The working group has decided to implement the editorial changes and  
will correct the typos, thanks for pointing them out. We have also  
decided to add to OWL 2 QL reflexive, irreflexive, & asymmetric  
property axioms. Moreover, we will fix the inaccuracies in the  
complexity table, following suggestions by Misha and discussions with  
you: for data complexity, we will add that OWL 2 QL is in AC_0, i.e.,  
queries are first order rewritable and that the taxonomic complexity  
is NLogSpace-complete.

We have decided *not* to add sameAs to OWL 2 QL, but to add a  
paragraph that explains that, if one wants to handle ontologies that  
are OWL 2 QL plus sameAs, then one can use a preprocessing step that  
materializes the sameAs relation and uses it in query answering  
procedures to simulate individual equality reasoning (see http://www.w3.org/2007/OWL/wiki/Profiles#Feature_Overview_2) 

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group's response to your comment.

Uli Sattler
on behalf of the W3C OWL Working Group 
Received on Wednesday, 25 March 2009 18:27:02 UTC

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