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RE: Re: determining ID-ness in XML

• From: Leigh Dodds <ldodds@i...>
• To: "Christopher R. Maden" <crism@m...>, xml-dev@l...
• Date: Tue, 06 Nov 2001 09:27:53 +0000

> -----Original Message-----
> From: Christopher R. Maden [mailto:crism@m...]
> Sent: 06 November 2001 05:42
> To: xml-dev@l...
> Subject: RE:  Re: determining ID-ness in XML
> 
[...]
> Not really.  Most applications that need references use them explicitly; 
> e.g., they do something like id(@idref) in an XPath.  In SGML, ID and 
> IDREF(S) were subject to the same case normalization rules, but since 
> that's gone in XML, it's not an issue any more.  A validator needs to 
> ensure that all IDREFs are valid, but we're only considering the case of 
> non-validating parsers.

I don't follow. I was simply suggesting that if we're providing the 
ability to declare unique identifiers outside of a DTD, then it seems 
reasonable to be able to declare cross-references as well.

The 'XML processor' will be checking uniqueness of the identifiers, so 
it'd be a snap to check that cross-references are correct as well.

L.


-- 
Leigh Dodds, Research Group, Ingenta | "Pluralitas non est ponenda
http://weblogs.userland.com/eclectic |    sine necessitate"
http://www.xml.com/pub/xmldeviant    |     -- William of Ockham

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