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   RE: [xml-dev] semantics in schema (xsd)

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Yes, modeling wife as a subclass of female may not be the right thing to
do. Another option in either RDF or OWL is for wife or husband to be
modeled as a property of male/female. It could then be said (using, for
example, domain - range restrictions of RDF) that wife's must be females
and husband's must be males.

Irene Polikoff

-----Original Message-----
From: Michael Kay [mailto:michael.h.kay@ntlworld.com] 
Sent: Thursday, February 26, 2004 4:58 AM
To: 'Chiusano Joseph'; 'Pedro Salazar'
Cc: xml-dev@lists.xml.org
Subject: RE: [xml-dev] semantics in schema (xsd)

# classes in RDF or
# OWL (where a wife could be a subclass of female, for example).

Creating a class hierarchy in which objects are classified according to
mutable properties of the object is not normally recommended practice.

Or do RDF/OWL allow an object to change its class over time?

Michael Kay

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