Re: Specifying scope of uniqueness in XML Schemas?
Roger Costello <costello@m...> writes: > In section 3.7 of the XML Schema spec it talks about the mechanism for > indicating uniqueness (of elements, attributes, or combinations > thereof). It says that you can specify uniqueness within a region, or > over the entire document: > > "Constraints can be specified to have document-wide scope or to hold > within the scope of particular elements." > > Can someone explain to me how you indicate the scope of a constraint? I > am guessing that it is with the selector element, but I am not sure. Sorry this isn't clearer: The scope is indicated by where the declaration goes: if I put a <key> element within an element declaration for an element named 'foo', then the uniqueness and ubiquity constraints obtain within each <foo>...</foo> in a document. The <selector> tells you which elements WITHIN each <foo> must have keys. ht -- Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh 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/ xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To unsubscribe, mailto:majordomo@i... the following message; unsubscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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