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Re: [xml-dev] XML schema cos-nonambig problem
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Niels Peter Strandberg writes:
> <xs:complexType name="contentiddef">
> <xs:choice>
> <xs:choice minOccurs="0" maxOccurs="unbounded">
> <xs:element ref="x:major"/>
> <xs:element ref="x:externalid"/>
> </xs:choice>
> <xs:choice minOccurs="0" maxOccurs="unbounded">
> <xs:element ref="x:major"/>
> <xs:element ref="x:minor"/>
> <xs:element ref="x:version"/>
> </xs:choice>
> </xs:choice>
> </xs:complexType>
In DTD notation, this is ((ma|e)*|(ma|mi|v)*).
I don't believe this can be made OK, for DTD or W3C XML Schema,
but I also somehow doubt this is what you mean/want, given the names
of the elements involved.
What you have written would allow, for example, any of the following:
[the empty sequence]
<minor/> <minor/> <version/> <minor/> <minor/> <major/>
<major/> <major/>
<externalId/>
Is that really what you meant?
Here's something that looks more plausible to me, but I may be
guessing completely wrongly:
(ma,(e|mi,v)?)*
ht
- --
Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
Half-time member of W3C Team
2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
Fax: (44) 131 650-4587, e-mail: ht@...
URL: http://www.ltg.ed.ac.uk/~ht/
[mail really from me _always_ has this .sig -- mail without it is forged spam]
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