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RE: ISSUE-52 (Explanations): Specification of OWL equivalences and rewriting rules for explaining inferences

From: Kashyap, Vipul <VKASHYAP1@PARTNERS.ORG>
Date: Sun, 4 Nov 2007 08:40:46 -0500
Message-ID: <DBA3C02EAD0DC14BBB667C345EE2D124010F06C4@PHSXMB20.partners.org>
To: "Jim Hendler" <hendler@cs.rpi.edu>
Cc: <public-owl-wg@w3.org>
Agree with your opinion that there might be a scope issue here and may be we are
early in the game..

This is very important for an ontology developer though.


Maybe we can start off by having some placeholders where all these things are
"strings" for now

and then further specify their structure as things move forward?


Have just sent out an e-mail further clarifiying my thoughts on the issue and
may be some commonly

known entailments and proofs can be standardized?







From: Jim Hendler [mailto:hendler@cs.rpi.edu] 
Sent: Sunday, November 04, 2007 8:37 AM
To: Kashyap, Vipul
Cc: public-owl-wg@w3.org
Subject: Re: ISSUE-52 (Explanations): Specification of OWL equivalences and
rewriting rules for explaining inferences



 In the first OWL group there were a number of features that we couldn't get
consensus on a conclusion to (Part-whole being a good example) where we took the
approach that we should provide the tools to define these things, rather than
try to specify them.  Given the current state of explanation research, my
instinct is that we could probably do that in this case by making the annotation
mechanism a little stronger, and letting people build their own for the things
you suggest for now - after those have been out and deployed, we might get more
consensus (note that I use a lot of non-tableaux based procedural reasoners in
my new work, so how you would explain the proofs could be arbitrarily hard)




On Nov 3, 2007, at 1:28 PM, Kashyap, Vipul wrote:

Clarification on this ISSUE-52"


Would like to propose that constructs for the following "extra-logical ?"
features be included in the OWL 1.1 Spec


1.	Proofs - probably as a sequence of entailments
2.	Entailments
3.	Explanations - probably as a human readable verbalizations of


The use case for the above is the need for an explanation feature for developing
and debugging large scale OWL ontologies.

A standardized specification of the above would enable better tool support for
these features enabling sharing of explanations

across tools and applications.. This will increase productivity of the ontology


Would like to discuss how this ISSUE is viewed as being within or beyond the
scope of the current WG.



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


Prof James Hendler

Tetherless World Constellation Chair

Computer Science Dept

Rensselaer Polytechnic Institute, Troy NY 12180



Received on Sunday, 4 November 2007 13:41:01 UTC

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