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- From: "Alan Santos" <asantos@odi.com>
- To: "Henry S. Thompson" <ht@cogsci.ed.ac.uk>
- Date: Wed, 5 Jan 2000 18:55:29 -0500
> There is a widespread need for this functionality, c.f. the Cambridge
> Communique [1]. Schema-internal specification of this information is
> not explicitly supported, except as you say in a general way via
> <appinfo>, in the current PWD.
I'm not familiar with the Cambridge Communique. The link returned a 404.
After a bit of searching, I was able to find references to it in the list
archives. The refrences seem very applicable.
Is it possible you mistyped the link? I'd like to look into it further.
> I THINK what you want is to declare an element or attribute as
> pointing (via a URL, or IDREF, or keyref) to something of a specified
> type. XML Schema as such does not give you this facility with full
> generality, although the <key>/<keyref> facility can achieve something
> close to this for on-board links. Validiting such a constraint for
> off-board links is outside the scope of XML Schema in my view.
>
Yes, this is what I meant.
The key/keyref is a possibility I hadn't explored.
Thanks for the help,
alan
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