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The domain value of a owl:subClassOf statement (OWL DL)

From: Yuzhong Qu <yzqu@seu.edu.cn>
Date: Sun, 30 Mar 2003 22:19:15 +0800
Message-ID: <000f01c2f6c7$58495180$9c0b77ca@xobjects>
To: "Peter F. Patel-Schneider" <pfps@research.bell-labs.com>
Cc: <www-rdf-logic@w3.org>

8.2 OWL DL [ In OWL Reference] says:

a.. In OWL DL anonymous classes are only allowed to occur in the following places in class axioms: 
  a.. within the range value of a rdfs:subclass, owl:equivalentClass or owl:disjointWith statement 
  b.. as the domain value of a owl:equivalentClass or owl:disjointWith statement 
This implies that the anonymous class cannot be the domain value of a owl:subClassOf statement.


But, 2.3.2.1. OWL DL Class Axioms  [ In OWL Abstract Syntax and Semantics] says:
axiom ::= 'DisjointClasses(' description { description } ')'
        | 'EquivalentClasses(' description { description } ')'
	| 'SubClassOf(' description description ')'
This means the anonymous class could be the domain value of a owl:subClassOf statement.

Does the anonymous class is allowed to occur as domain value of a owl:subClassOf statement in OWL DL?

Yuzhong Qu
Received on Sunday, 30 March 2003 22:45:08 GMT

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