Re: [LC Response] To Chris Welty Re: RIF perspective on supported datatypes

Peter &al,

At our April 15th F2F meeting, the RIF WG resolved to accept/support all the OWL 
datatypes except owl:rational.


This brings the set of datatypes between RIF and OWL extremely close.  We agreed 
we could live with having this one difference, but would prefer if we didn't, 
and if owl:rational was removed (we note it continues to be at-risk).  A 
possibility, for example, would be to make owl:rational a part of the optional 
extension you mentioned, and not part of OWL proper. Another possibility is to 
designate owl:rational itself as optional.

I think this means we are only partially satisfied with the response.


Peter F. Patel-Schneider wrote:
> Dear Chris (and the RIF WG),
> Thank you for your message
>   <>
> on the OWL 2 Web Ontology Language last call drafts.  
> The working group paid close attention to the datatypes that it
> supports.  We examined the XML Schema datatypes to determine those that
> are acceptable for use within OWL.  The datatypes xsd:normalizedString,
> xsd:token, xsd:Name, xsd:NCName, and xsd:NMTOKEN are simply derived from
> xsd:string and pose no problems for OWL 2.  They are therefore included
> in the datatypes of OWL 2.
> There was considerable discussion of owl:rational in the working group.
> There are natural uses for owl:rational (for example in recipes) but
> another reason to include owl:rational is to support n-ary datatypes
> with linear equations in data ranges.  This optional extension to OWL 2
> is in preparation; the current document can be found at
> <>
> The OWL working group is interested in there being a set of Web
> compatible datatypes. Toward that end, the OWL working group will work
> with the RIF working group to describe and extend the set of datatypes
> supported by both OWL and RIF.
> Please acknowledge receipt of this email to
> <> (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 

Dr. Christopher A. Welty                    IBM Watson Research Center
+1.914.784.7055                             19 Skyline Dr.                           Hawthorne, NY 10532

Received on Thursday, 16 April 2009 22:55:16 UTC