Writeups on XML Schema datatypes

The following writeups on datatypes in XML Schema:

http://www.webreference.com/xml/column61/
and
http://www.xml.com/pub/a/2002/07/31/wxstypes.html

argue strongly why datatypes in XML Schema are badly done.
Input for those among us who will have to worry about
datatypes in OWL, and how we lean on datatypes in RDF and/or XML Schema.

Frank.
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