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RE: dynamically generated XML Schema?! Re: R: [xml-d

• To: "'TAN Kuan Hui'" <kuanhui@x...>,"'Burak Emir'" <Burak.Emir@e...>,"'Chizzolini Stefano'" <chist@c...>
• Subject: RE: dynamically generated XML Schema?! Re: R: Number of active public XML schemas
• From: "Michael Kay" <michael.h.kay@n...>
• Date: Thu, 4 Nov 2004 09:55:55 -0000
• Cc: <xml-dev@l...>
• In-reply-to: <003801c4c20e$dd598a20$6502a8c0@pinecone>
• Thread-index: AcTCDoktN3hJGGC/Rpq2nnMBruLbwQARMpGg

> Shouldn't it be the case that the validation process necessitates
> a 2-stage parsing ? What I mean is that XSD can only do a lexical
> validation, a second follow-up stage that validates against the
> application semantics is required.

That's actually four levels already: unicode encoding, XML well-formedness,
schema validity, and application validity. And yes, you often need multiple
levels.

But that doesn't stop you wanting individual levels to be configurable. A
very simple example, when I validate new documents I want to check that the
date is today. That kind of thing is very easily achieved by a configurable
schema. Equally, the application-level validation is often done using XSLT
stylesheets, and people often transform stylesheets for the same reason: you
need things to be configurable at that level too.

Michael Kay 

• Follow-Ups:
  • Re: dynamically generated XML Schema?! Re: R: Number of active public XML schemas
    • From: "TAN Kuan Hui" <kuanhui@x...>
  • Re: dynamically generated XML Schema?! Re: R: Number of active public XML schemas
    • From: "Nathan Young" <natyoung@c...>

• References:
  • Re: dynamically generated XML Schema?! Re: R: Number of active public XML schemas
    • From: "TAN Kuan Hui" <kuanhui@x...>

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