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Re: ISSUE-111 Proposal to Resolve

From: Jim Hendler <hendler@cs.rpi.edu>
Date: Fri, 8 Aug 2008 12:33:10 -0400
Cc: public-owl-wg Group WG <public-owl-wg@w3.org>
Message-Id: <554C8CAA-F7A5-4770-BF1F-8941A5B6A5E2@cs.rpi.edu>
To: Ian Horrocks <ian.horrocks@comlab.ox.ac.uk>

Having left the WG, I seem to still be being pulled in a lot by side  
emails, so let me state, as RPI AC rep, that we don't like this  
solution.  I see two problems
  1 - it seems to us that people who use DL are more likely to  
understand the difference between DL and Full than those who are just  
using the vocabulary, so the chances of this triple being included  
seem very low - thus, we'd prefer to see someone who understands that  
they want to be only DL should have to do something to signal that
  2 - by this decision, if a user accidently does something to make  
their ontology OWL Full, they will be signaling they only want to be  
in Full (since it says "should include a triple that takes the  
ontology out of OWL DL") -- if the meaning is that we want users to  
use only this specific triple, then it seems to me we should do  
something more obvious, like putting in some semantics free definition  
that expresses intent -- i.e. instead of "sameAs sameAs sameAs"  
wouldn't it be a lot smarter for the document to include "[]  
intendedUse OWL-Full"?

In fact, given these two factors, it seems like we should either have  
explicit means for signaling semantics when intended, or no specified  
way, meaning tools have their choice.

On Aug 8, 2008, at 11:31 AM, Ian Horrocks wrote:

> As per discussions and strawpolls at the Boston F2F [1] and our most  
> recent telecon [2], I propose that we close this issue by adding to  
> the spec the advice that users wanting to ensure that their ontology  
> is interpreted *only* as OWL Full should include a triple that takes  
> the ontology out of OWL DL, namely:
> sameAs sameAs sameAs .
> Regards,
> Ian
> [1] http://www.w3.org/2007/OWL/meeting/2008-07-28#Strawpoll_on_signaling_semantics
> [2] http://www.w3.org/2007/OWL/meeting/2008-08-06#Strawpoll_on_resolving_issue__2d_111

"If we knew what we were doing, it wouldn't be called research, would  
it?." - Albert Einstein

Prof James Hendler				http://www.cs.rpi.edu/~hendler
Tetherless World Constellation Chair
Computer Science Dept
Rensselaer Polytechnic Institute, Troy NY 12180
Received on Friday, 8 August 2008 16:33:51 UTC

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