W3C home > Mailing lists > Public > www-webont-wg@w3.org > June 2002

Re: Issue 3.4 - daml:UnambiguousProperty

From: Jim Hendler <hendler@cs.umd.edu>
Date: Thu, 6 Jun 2002 07:24:03 -0400
Message-Id: <p05111701b924f623a161@[10.0.1.4]>
To: Ian Horrocks <horrocks@cs.man.ac.uk>
Cc: webont <www-webont-wg@w3.org>

At 11:18 AM +0100 6/6/02, Ian Horrocks wrote:
>On May 29, Jim Hendler writes:
>>
>>  Issue 3.4 - daml:UnambiguousProperty
>>
>>    Proposal - CLOSE THIS ISSUE
>>
>>     The issue here was that the requirements document didn't motivate
>>  this language feature.  However, no one has advocated its removal and
>>  there does seem to be consensus it is a desirable feature.  It is
>>  provided for in DAML+OIL and will be provided in OWL.
>
>
>This issue may be tied to the INVERSE issue. UnambiguousProperty
>really means functionality w.r.t. the inverse property. If we no
>longer support inverse, then it seems a little strange to be able to
>assert its functionality.
>
>Ian
>

I'm confused about "no longer support inverse" -- we resolved the 
inverse issue and decided we would indeed support it.

 From log of May 30 telecon-
>a) ISSUE InverseOf
>http://www.w3.org/2001/sw/WebOnt/webont-issues.html#4.5-InverseOf
>
>"InverseOf is a highly used (some say misused) feature of
>DAML+OIL. The OWL-Full proposal left it out, because of some worries
>on the part of some participants that it caused some logical problems
>for users. Other people argue it is an important expression in the
>mapping between ontologies."
>
>Proposed resolution by Dan Connoly:
>http://lists.w3.org/Archives/Public/www-webont-wg/2002May/0264.html
>
>
>Ian: description seems to involve UniquelyIdentifyingPropert often with
>respect to Datatypes.
>
>proposal is ammended in resolution 5.1 when used with datatypes still open,
>elsewise close.
>
>closed in favor. closing text will be online. resolved.

so the only open issue is whether inverse is allowed with datatypes 
(pending resolution of datatypes by RDF Core)

  -JH



-- 
Professor James Hendler				  hendler@cs.umd.edu
Director, Semantic Web and Agent Technologies	  301-405-2696
Maryland Information and Network Dynamics Lab.	  301-405-6707 (Fax)
Univ of Maryland, College Park, MD 20742	  240-731-3822 (Cell)
http://www.cs.umd.edu/users/hendler
Received on Thursday, 6 June 2002 07:24:22 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Monday, 7 December 2009 10:57:50 GMT