• From: Andrew Layman <andrewl@m...>
• To: xml-dev@l...
• Date: Thu, 13 Jul 2000 17:58:42 -0700

XML-Data Reduced (aka "XDR") is a schema format that has been supported by
Microsoft XML parsers for some years now.  It has a subset of the features
that are proposed for the W3C Schema language (aka "XSD") and is a
reasonable step along the path to XSD. 

Regarding the particular differences between the languages, XDR uses
instance syntax, supports the W3C XML Namespaces specification, allows open
content models and supports datatypes.  XSD has all that and much more. 

Which one you want to use now depends on a number of factors, including
which parser you want to employ and the stability you require of the
language and its implementations.  Hopefully in the not-too-distant future
it will have all sorted itself out and XSD will be the obvious choice.

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