• To: Alessandro Di Bella <alessandro.dibella@e...>
• Subject: Re: IDREF constraint
• From: ht@c... (Henry S. Thompson)
• Date: 17 Dec 2002 15:25:52 +0000
• Cc: xmlschema-dev@w..., xml-dev@l...
• In-reply-to: <3DFF3C83.8070201@e...>
• References: <3DFF3C83.8070201@e...>
• Sender: ht@i...
• User-agent: Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.4 (Military Intelligence)

Alessandro Di Bella <alessandro.dibella@e...> writes:

> does anyone know if there is a way of constraining the value if an IDREF
> attribute in order allows as values only IDS of specified elements ?

Use (key or unique) and keyref, then you can have separate namespaces
for different key families.  There's an introduction to key/keyref in
the Primer [1].

ht

[1] http://www.w3.org/TR/xmlschema-0/
-- 
  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2002, 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/
 [mail really from me _always_ has this .sig -- mail without it is forged spam]

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