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Re: Proposed response to Golbeck regarding imports issue

From: Jim Hendler <hendler@cs.umd.edu>
Date: Tue, 17 Jun 2003 08:08:52 -0400
Message-Id: <p05200f0bbb14b2f147e8@[]>
To: "Peter F. Patel-Schneider" <pfps@research.bell-labs.com>
Cc: www-webont-wg@w3.org
At 11:53 PM -0400 6/16/03, Peter F. Patel-Schneider wrote:

>If there is not an imports statement, then OWL does not license importing.
>Any software that does so is not fully OWL compliant.  The negative
>entailment test Imports-002 is a test of this situation.

Peter - negative entailment test002 reads:

If a premise document uses a namespace but does not import the 
document corresponding to the namespace, then the premises do not 
necessarily entail anything that is entailed by the conjunction of 
the two documents.

"The premises do not necessarily entail" which is not the same as 
saying the premises necessarily do not entail.

Further, the definition of a non-entailment test is:

3.3. Non-Entailment Tests These tests use two documents. One is named 
premisesNNN.rdf, the other is named nonconclusionsNNN.rdf. The 
nonconclusions are not entailed by the premises. Such entailment is 
defined by the OWL semantics [OWL Semantics and Abstract Syntax], 
(see also OWL Full entailment). Exceptionally, test imports-002 
includes a third document.

i.e. not entailed by, which I believe is not the same as "the 
negation is entailed by"

I read this one carefully before I was willing to approve it, and 
this statement is, indeed, consistent with the decision taken by the 
Our normative test document is therefore consistent with what I 
described yesterday and I believe this still stands.


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	  *** 240-277-3388 (Cell)
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Received on Tuesday, 17 June 2003 08:09:04 UTC

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