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   Re: [xml-dev] XQuery types was Re: [xml-dev] Yet another plea for XUp

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  • To: <xml-dev@lists.xml.org>
  • Subject: Re: [xml-dev] XQuery types was Re: [xml-dev] Yet another plea for XUpdate...
  • From: "Rick Jelliffe" <ricko@allette.com.au>
  • Date: Thu, 4 Jul 2002 18:27:53 +1000
  • References: <>

From: "Jonathan Robie" <jonathan.robie@datadirect-technologies.com>
> Actually, the XML Schema list is shorter. There are 12 tools listed on 
> their tool page, but only about 7 of these are not schema validators, 
> depending on how you count. XML Schema is a REC, XQuery is a Working Draft.

Actually, that tool list is not a list of implementations per se, because thers is some
double counting (Topologi's Schematron Validator uses MSXML, for example.)
There are at least current 9 implementations of  XML Schemas:

  MSXML (and I think the .NET validator is different code)
  Apache  (also reused in Sun's implementation?)
  Sun MSV
  IBM SQC (+other validator folded into Apache now?)  
And (I would hope after all this time) a couple of others.

Compare Schematron, for which there are between 10 to 17 
implementations (depending how you count :-)

    (about 8 different implementations, each working on
    at least 8 different implementations of XSLT)
  C++ (Cocoon)
  Java (MSV, experimental)
RELAX NG has at least 5 implementations, plus a lot of
supporting tools.
Rick Jelliffe


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