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RE: semantics in schema (xsd)

• To: "'Michael Kay'" <michael.h.kay@n...>,"'Chiusano Joseph'" <chiusano_joseph@b...>,"'Pedro Salazar'" <pedro-b-salazar@p...>
• Subject: RE: semantics in schema (xsd)
• From: "Irene Polikoff" <Irene@t...>
• Date: Fri, 27 Feb 2004 08:52:31 -0500
• Cc: <xml-dev@l...>
• Importance: Normal
• In-reply-to: <20040226095808.MPLV21785.mta08-svc.ntlworld.com@Turtle>

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@n...] 
Sent: Thursday, February 26, 2004 4:58 AM
To: 'Chiusano Joseph'; 'Pedro Salazar'
Cc: xml-dev@l...
Subject: RE:  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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