> -----Original Message-----
> From: John Cowan [mailto:]
> Sent: Friday, June 21, 2002 11:11 AM
> To: Dare Obasanjo
> Cc: Rick Taylor;
> Subject: Re: [xml-dev] XML Schema to relaxNG xslt
>
> > W3C XML Schema has a number of features that do not exist
> in RELAX NG
>
> I would like to see you or somebody cash this cheque. So far
> there has been plenty about RNG features that don't exist in
> WXS, but not so much vice versa except for the extensible types.
Extensible types are a major feature of W3C XML Schema and I don't think
I've seen many schemas that do not use them. A RELAX NG mapping of an
XSD document that doesn't replicate this functionality one way or the
other is a non-starter for most of the uses of XSD that I've seen. Look
through news://microsoft.public.xml & news://microsoft.public.dotnet.xml
compare the ratio of schemata that use type extensibility to those that
do not. A lot of functionality falls under extensible types including
polymorphism via substitution groups and xsi:type which I do not see
RELAX NG being able to do.
I also don't see any RELAX NG equivalent to the identity constraints
xs:unique, xs:keyref and xs:key.
Is there anything akin to xs:redefine in RELAX NG? I couldn't find it in
a cursory reading of the tutorial or the spec.
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