Re: Either-Or Constraint

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Subject: Re: Either-Or Constraint
From: Oleg Tkachenko <olegt@xxxxxxxxxxxxx>
Date: Mon, 10 Mar 2003 09:54:07 +0200

Jack Cane wrote:

I would like to enforce a constraint that an element must have one and/or
the other of two child elements. That is, the two child elements are both
0..unbounded, but one or the other must be present.

To put it another way, if B is absent, A must be present, but if B is
present, A is optional.

So what about xs:choise then?

<xs:choice>
	<xs:element name="A" type="xs:string" maxOccurs="unbounded"/>
	<xs:element name="B" type="xs:string" maxOccurs="unbounded"/>
</xs:choice>

PS. This is offtopic here, you'd better ask w3c schema questions on schema-dev mail list. -- Oleg Tkachenko Multiconn Technologies, Israel

XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list

Current Thread
Either-Or Constraint Jack Cane - Sun, 9 Mar 2003 21:44:11 -0500 (EST) Oleg Tkachenko - Mon, 10 Mar 2003 02:50:02 -0500 (EST) <= <Possible follow-ups> Cams Ismael - Mon, 10 Mar 2003 03:34:10 -0500 (EST)

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