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Re: XML Schemas and the Enumeration Facet

From: Henry S. Thompson <ht@cogsci.ed.ac.uk>
Date: 19 Aug 2002 10:52:37 +0100
To: "Brown, Lee" <Lee.Brown@standardregister.com> (by way of "C. M. Sperberg-McQueen" <cmsmcq@acm.org>)
Cc: W3C XML Schema Comments list <www-xml-schema-comments@w3.org>
Message-ID: <f5belcvkwey.fsf@cogsci.ed.ac.uk>

"Brown, Lee" <Lee.Brown@standardregister.com> (by way of "C. M. Sperberg-McQueen" <cmsmcq@acm.org>) writes:

> I have a question about enumerations, if I have the following schema
> definition, can I have an empty string value for the attribute CarType, like
> CarType="" ?
> 
> <xsd:schema targetNamespace="http://www.abc.com"
> xmlns:xsd="http://www.w3.org/2000/10/XMLSchema">
> 	<xsd:attribute name="CarType">
> 		<xsd:simpleType>
> 			<xsd:restriction base="xsd:NMTOKEN">
> 				<xsd:enumeration value="Buick" />
> 				<xsd:enumeration value="Chevy" />
> 				<xsd:enumeration value="Ford" />
> 				<xsd:enumeration value="Mercedes" />
> 			</xsd:restriction>
> 		</xsd:simpleType>
> 	</xsd:attribute>
> </xsd:schema>

No -- the enumerations define all the allowed values, and "" is not
among them.

ht
-- 
  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2002, part-time member of W3C Team
     2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
	    Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk
		     URL: http://www.ltg.ed.ac.uk/~ht/
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Received on Monday, 19 August 2002 05:52:41 GMT

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