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Joe Chiusano wrote:
> I believe this will not work because the schema would be
> non-determinstic. That is, because the following declaration:
>
> <xs:element ref="earliestdate" minOccurs="0"/>
>
> appears in two different "choice" constructs, a schema processor
> will not be able to discern whether an occurrence of "earliestdate"
> is applicable to the first "choice" construct or the second one.
> Same idea for "latestdate".
I think that the desired model is:
(description, ( (earliestdate, latestdate?) |
(latestdate, earliestdate?) ))
i.e. a description followed by either earliestdate (maybe followed by
latestdate) or latestdate (maybe followed by earliestdate):
<xs:sequence>
<xs:element name="description" />
<xs:choice>
<xs:sequence>
<xs:element name="earliestdate" />
<xs:element name="latestdate" minOccurs="0" />
</xs:sequence>
<xs:sequence>
<xs:element name="latestdate" />
<xs:element name="earliestdate" minOccurs="0" />
</xs:sequence>
</xs:choice>
</xs:sequence>
But it wasn't described very clearly, so David Yancey might have
wanted something completely different.
Cheers,
Jeni
---
Jeni Tennison
http://www.jenitennison.com/
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