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Re: SWBPD note on QCRs

From: Pat Hayes <phayes@ihmc.us>
Date: Tue, 25 Apr 2006 13:14:58 -0500
Message-Id: <p06230903c074155faf25@[]>
To: Guus Schreiber <schreiber@cs.vu.nl>
Cc: "Peter F. Patel-Schneider" <pfps@research.bell-labs.com>, Ian Horrocks <horrocks@cs.man.ac.uk>, <public-swbp-wg@w3.org>, Alan Rector <rector@cs.man.ac.uk>

>Peter, Ian,
>In the SW Best Practices group Alan Rector and I have been working 
>on a note on QCRs, with the intention of providing guidance for 
>ontology engineers. The note is mainly based on the work-arounds and 
>proposals we developed during the WebOnt discussions about this. The 
>current draft [1] has been lying around for a year or so (there were 
>some formatting updates, but nothing major) and we would like to 
>finish this now.
>Patterns 1 & 2 in [1] are work-arounds for OWL as it is. I want to 
>draw your attention to pattern 3, a "non-endorsed OWL extension", 
>which actually comes from the WebOnt resolution on QCRs [2, end of 
>the email].
>I was looking at OWL 1.1 documents [3, 4] to see what kind of syntax 
>you propose. I found the abstract syntax, but no mapping to RDF/XML 
>triples. I have two questions:
>- Is there a proposal for a OWL 1.1 RDF/XML representation of QCRs?
>- What do you think of the proposed RDF/XML syntax in pattern 3 of 
>[1]? Comments and/or proposals for alternatives would be very much 

If I might interject, I have reservations about the suggested OWL/RDF 
syntax, not because it is not natural, but because it is already 
legal and already therefore has a semantics. I think that, in spite 
of (or perhaps because of) the naturalness of simply adding the 
owl:valuesFrom triple, that it would be better to introduce a new 
term for the QCR case, perhaps owl:propertyValuesFrom, rather than 
re-use the older term with a change of meaning. The syntax you 
propose is not in fact an OWL extension, but an OWL alteration.


>[1] http://www.w3.org/2001/sw/BestPractices/OEP/QCR/
>[2] http://lists.w3.org/Archives/Public/www-webont-wg/2003May/0072.html
>[3] http://www-db.research.bell-labs.com/user/pfps/owl/overview.html
>[4] http://www-db.research.bell-labs.com/user/pfps/owl/syntax.html
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Received on Tuesday, 25 April 2006 18:15:18 UTC

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