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At 06:31 PM 5/9/2002 +0100, Jeni Tennison wrote: > > At least some schema validators do make the PSVI information > > available (via regrettably proprietary interfaces), so I don't see > > why this information can't be exploited. Again, it might make more > > sense to use a separate "lint-and-optimizing-rewrite" tool to check > > and optimize a stylesheet rather than do this every time a > > stylesheet is executed. > >I (or the XQuery Semantics WD) might be behind the times, but the >current WD indicates that "XML Schema is based on named typing, while >the XQuery type system is based on structural typing." The definition >of a "subtype" in the XQuery Semantics WD is not the same as a >"derived type" in XML Schema. That's why I say that implementers need >to implement this validation themselves rather than reuse the code of >XML Schema validators Actually, our issues list is significantly behind the document itself, a victim of our rush to publication. The current XQuery specification has incorporated the "Named Typing Proposal", which has largely eliminated these discrepancies. We're still working out a few bumps and wrinkles. Jonathan
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