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On Wed, 2004-04-07 at 16:49, Thomas B. Passin wrote:
> Seems to me that you can just declare the attribute "default" to be of
> type ID. That requires its value to be unique. Then create a
> restriction so that it can only accept the value "true". Finally, make
> the attribute's presence optional. Now you are allowed to use it, but
> it must have the value "true" and that value may only appear once.
>
> This method ought to be easier and more interoperable than using "key".
Yes, that sounds easier.
> Of course, this won't work if you want to also include many attributes
> default='false'.
Or if you have other IDs that could have the value "true", or if you can
have several "computer_list" elements in a document, ...
The fact that IDs are global to a document has a lot of side effects.
Eric
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Eric van der Vlist http://xmlfr.org http://dyomedea.com
(ISO) RELAX NG ISBN:0-596-00421-4 http://oreilly.com/catalog/relax
(W3C) XML Schema ISBN:0-596-00252-1 http://oreilly.com/catalog/xmlschema
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