Re: draft response for 43b ZW3b

The diffs have not yet been made, as I was waiting for WG approval of
the changes involved, which happened at the F2F.  I'll make the changes
shortly, and put in an ednote to that effect to be removed before next
publication.

peter


From: Ian Horrocks <ian.horrocks@comlab.ox.ac.uk>
Subject: Re: draft response for 43b ZW3b
Date: Mon, 2 Mar 2009 17:15:37 +0000

> Looks fine to me (modulo missing link to diffs).
> 
> Ian
> 
> 
> On 24 Feb 2009, at 15:42, Peter F. Patel-Schneider wrote:
> 
>> [Draft Response for LC Comment 43b:] ZW2b
>>
>> Dear Zhe,
>>
>> Thank you for your message
>>   http://lists.w3.org/Archives/Public/public-owl-wg/2009Jan/0083.html
>> on the OWL 2 Web Ontology Language last call drafts.
>>
>> Your message contains multiple sections, affecting more than one
>> document, and will thus generate multiple replies.  This response
>> is for sections 4 and 8 about the datatypes in OWL 2 RL.
>>
>> We have adjusted the datatypes of OWL 2 RL to include those XML Schema
>> datatypes that are derived from xsd:string and xsd:integer, including
>> xsd:positiveInteger.  These were excluded from OWL 2 RL because of a
>> mistaken analogy with OWL 2 EL and OWL 2 QL, namely that intersection of
>> value spaces must be either empty or infinite to maintain the desired
>> properties of the profile.  It turns out that this is not needed in OWL
>> 2 RL to obtain its desired computational properties.  As any OWL 2 RL
>> tool has to process xsd: string and xsd:integer, the added
>> implementation burden to support these datatypes is negligible.
>>
>> The situation with owl:rational and owl:real is different.  The working
>> group has received complaints that implementing
>> these datatypes may require significant effort on top of a rule
>> reasoner.  Therefore owl:rational and owl:real 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
>> .....
>>
>> The working group notes that Oracle has also brought up concerns with
>> the treatment of xsd:float and xsd:double.  These two datatypes are not
>> currently part of OWL 2 RL.   If this situation changes the working
>> group will communicate with you.
>>
>> 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 Tuesday, 3 March 2009 14:12:15 UTC