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[LC Response] To Marijke Keet Re: haskey clarification

From: Peter F. Patel-Schneider <pfps@research.bell-labs.com>
Date: Wed, 04 Mar 2009 16:40:10 -0500 (EST)
Message-Id: <20090304.164010.64443439.pfps@research.bell-labs.com>
To: keet@inf.unibz.it
Cc: public-owl-comments@w3.org
Dear Marijke,

Thank you for your message
<http://lists.w3.org/Archives/Public/public-owl-comments/2009Jan/0062.html>
on the OWL 2 Web Ontology Language last call drafts.  

The OWL working group realizes that keys are often functional (and thus
1:1).  OWL in general does not have a requirement that properties are
functional.  Non-functional keys are useful in some cases, for example,
passport numbers are keys for people but quite a few people have more
than one passport number (because of multiple citizenship).

In any case, as you say, properties can be made functional in OWL,
either locally or globally, and this provides for functional keys.
Therefore, the OWL working group does not intend to change OWL 2 or to
make any changes in the OWL 2 document in response to your comment.

Please acknowledge receipt of this email to
<mailto:public-owl-comments@w3.org> (replying to this email should
suffice). In your acknowledgment please let us know whether or not you
are satisfied with the working group's response to your comment. 

Regards,
Peter F. Patel-Schneider
on behalf of the W3C OWL Working Group 
Received on Wednesday, 4 March 2009 21:40:00 GMT

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