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"Tolkin, Steve" <Steve.Tolkin@f...> writes:
> <snip/>
> IDs: Address the problem of how to generate ID (and IDREF) values from a
> database.
> The fact that an ID cannot be "look like" a pure number is a major
> limitation. I understand that this comes from XML itself, rather than from
> Schema. I further understand that this limitation is caused by wanting to
> ensure that an XML document is a valid SGML document. Is it possible to
> loosen up XML on this? Or is it possible for Schema to provide some help
> for this? This is related to the issue of wanting a way to have IDs that
> are not unique within the document as a whole, but which are unique within a
> smaller "scope", e.g. for a specific element type, or (perhaps) in a
> specific subtree associated with one input document in a "merged" document.
All this is provided for by the identity constraints of
key/unique/keyref in the existing design [1].
ht
[1] http://www.w3.org/TR/xmlschema-1/#Identity-constraint_Definition
--
Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
W3C Fellow 1999--2001, part-time member of W3C Team
2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
Fax: (44) 131 650-4587, e-mail: ht@c...
URL: http://www.ltg.ed.ac.uk/~ht/
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