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On Tue, 2003-07-15 at 11:38, Bob Foster wrote:
> From: "Eric van der Vlist" <vdv@dyomedea.com>
> > I have recently written (with much help from Murata Makoto) a chapter
> > dedicated to Relax NG, ambiguous and non-deterministic models proposing
> > a distinction between determinism and unambiguity and showing some more
> > examples:
> >
> > http://books.xmlschemata.org/relaxng/RngBookAssignment.html
> >
> > I hope that this chapter will clarify these topics and thank you for
> > sharing what you think about it.
>
> I am not sure this technical distinction helps the average schema writer.
> For example, rewriting an ambiguous schema so it is merely non-deterministic
> won't help XML Schema users. ;-}
This chapter is in a book about Relax NG and its number one goal is to
help Relax NG users :-) ...
> The only case I can think of where the distinction makes any difference is
> in XML Schema union types, which are allowed to be non-deterministic but are
> not unambiguous because of the first-match rule.
Or for using Relax NG tools (such as MSV) which can derive type
information out of unambiguous schemas whether deterministic or not
(more precisely, it will provide type information even if the schema is
ambiguous but I wouldn't always advise to rely on it).
Eric
--
Read me on XMLhack.
http://xmlhack.com/author.php?id=8
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Eric van der Vlist http://xmlfr.org http://dyomedea.com
(W3C) XML Schema ISBN:0-596-00252-1 http://oreilly.com/catalog/xmlschema
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