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> -----Original Message----- > From: John Cowan [mailto:jcowan@r...] > Sent: Friday, June 21, 2002 11:11 AM > To: Dare Obasanjo > Cc: Rick Taylor; xml-dev@l... > Subject: Re: 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. -- PITHY WORDS OF WISDOM Any philosophy that can be put into a nutshell belongs there. This posting is provided "AS IS" with no warranties, and confers no rights.
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