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Semantic layering bug (not again!)

From: Jeremy Carroll <jjc@hpl.hp.com>
Date: Mon, 22 Sep 2003 13:39:38 +0300
To: www-webont-wg@w3.org
Message-Id: <200309221339.38440.jjc@hpl.hp.com>


While doing the action concerning adding tests exhbiting the change agreed 
concerning owl:Ontology I noted that there is a further bug on semantic 
layering.

We agreed:

http://www.w3.org/2001/sw/WebOnt/webont-issues.html#I5.3-Semantic-Layering


 RESOLVED: to close the layering issue (5.3) as described in Consensus on 
semantic layering, with the change that KB large-OWL-entails C if 
KB-fast-OWL-entails C (but not only if -- Large OWL is now known as Owl Full, 
Fast Owl is now known as OWL DL). 


Unfortunately the following test contradicts that (also visisble in new tests 
Ontology-002, and Ontology-003).

===

<Empty>

entails

_:a rdf:type owl:Ontology .

====

I think this is an OWL Lite entailment but an OWL Full non-entailment.
Technically this follows from the decision we made to make such triples 
optional - I do not think making them compulsory would be the right fix.

Jeremy
Received on Monday, 22 September 2003 07:42:35 GMT

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