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[LC Response] To Jos de Bruijn Re: why restrict the set of datatypes in OWL 2 RL profile?

From: Peter F. Patel-Schneider <pfps@research.bell-labs.com>
Date: Wed, 18 Mar 2009 15:22:57 -0400 (EDT)
Message-Id: <20090318.152257.170163585.pfps@research.bell-labs.com>
To: debruijn@inf.unibz.it
Cc: public-owl-comments@w3.org
Dear Jos,

Thank you for your message
on the OWL 2 Web Ontology Language last call drafts.
You are correct that OWL 2 RL does not need the intersection of
datatypes to be empty or infinite.  Accordingly the datatypes in OWL 2
RL have been adjusted to include all the OWL datatypes that are
restrictions of xsd:decimal and xsd:string and also xsd:boolean.

In response to another comment 
on the difficulty of implementing datatypes in rules systems, 
owl:real and owl:rational have been removed from OWL 2 RL.
This possibility was mentioned in Feature At Risk #2.

The diffs for these changes can be found at

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Peter F. Patel-Schneider
on behalf of the W3C OWL Working Group 
Received on Wednesday, 18 March 2009 19:22:00 UTC

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