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Re: XML Schema Question: specifying restrictions for alist of

• To: xml-dev@l...
• Subject: Re: XML Schema Question: specifying restrictions for alist of elements
• From: Eric van der Vlist <vdv@d...>
• Date: Wed, 07 Apr 2004 17:56:04 +0200
• In-reply-to: <407414E0.2080808@c...>
• Organization: Dyomedea (http://dyomedea.com)
• References: <08AE6B9487F960468A915ECA3C29E1AC06033C24@n...> <1081344627.3353.626.camel@delleric> <407414E0.2080808@c...>

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
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• References:
  • RE: XML Schema Question: specifying restrictions for a list of elements
    • From: Tom Gaven <Tom.Gaven@e...>
  • RE: XML Schema Question: specifying restrictions for a list of elements
    • From: Eric van der Vlist <vdv@d...>
  • Re: XML Schema Question: specifying restrictions for a list of elements
    • From: "Thomas B. Passin" <tpassin@c...>

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