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Paul Spencer <paul@alphaxml.com> writes:
<snip/>
> I don't think use of <xs:any> etc is enough to allow us to use two
> XML Schema schemas in series.
Not obvious why this won't work -- I hadn't thought of it but it's a
good idea, if your locale-specific variants are not of the
optional->required/prohibited variety. The W3C XML Schema REC is
designed, via <xs:any namespace="##other" processContents="strict"/>,
to enable what amounts to serial processing by two single-namespace
schema documents.
> The use of <xs:redefine> is certainly appealing - we have a single
> schema against which to validate for each locale rather than having to
> process two (in separate languages) in series. Change management is
> reasonably simple, but possibly error prone. Change in the global
> schema requires recoding of the locales, which is a shame. This is
> caused by the need to replicate information that is not being changed
> when applying restrictions. It could be that this can be minimized by
> careful design. I suspect that my schemas are already coded to make
> this reasonably easy, but some further definitions of named complex
> types could help.
Or named model groups.
> It would be interesting to experiment. Why is this
> error-prone? Well, I know that XML Spy (4.3) will not report an error
> if a type changes (say by adding an element) but the derived
> (restricted) type is not changed to match. I have not tried other
> tools. Certainly, an automated check for this would be required. And
> no - I have not yet checked the spec to see what action should be
> taken, or even really thought about it yet.
So your tool is broken -- get it fixed, don't use a bad design to work
around it!
<snip/>
> My intention is to experiment a bit with the <xs:redefine> to see just
> how big the derived schema documents become. Then I feel I will have a
> good view of the better mechanism for this and other circumstances.
Keep us posted -- if there are reasons why it doesn't let you do what
you need, that's important feedback to the WG wrt subsequent versions.
ht
--
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@cogsci.ed.ac.uk
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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