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   Re: [xml-dev] Can XML Schemas do this?

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> Why do the schema languages care about the particular
> order of the XML nodes? 

This may be important if parsing an XML document using DOM - for
example, one may want to "place" elements that are always/often accessed
(such as primary key values in relational database terms) near the top
of an XML document, or near the top of a content model within an XML
document for performance purposes.  (But since a tree for the entire
document needs to be built anyway, this may not buy you much in terms of
performance - just thinking out loud).

Joe Chiusano
Booz | Allen | Hamilton

"Bryce K. Nielsen" wrote:
> > 1) Use another schema language (Relax NG does this very well) instead of
> > W3C XML Schema.
> >
>  I'm somewhat new to Relax NG, but reading through it's primer doc it
> appeared that the Order of the Elements was also strictly governed by the
> schema (in other words, you can't do this in RelaxNG either). Which brings
> the question, WHY? Why do the schema languages care about the particular
> order of the XML nodes? I can see the advantages of having this as an option
> (i.e. something like <sequence order="fixed"> or something) but to make it a
> requirement seems to backwards for most XML usages.
> -BKN
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tel;work:(703) 902-6923
org:Booz | Allen | Hamilton;IT Digital Strategies Team
adr:;;8283 Greensboro Drive;McLean;VA;22012;
title:Senior Consultant
fn:Joseph M. Chiusano


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