I should also note that XML Schema Part 2 helpfully provides a namespace
that contains just the builtin datatypes without any of the other multitude
of things defined in XML Schema:
"To facilitate usage in specifications other than the XML Schema definition
language, such as those that do not want to know anything about aspects of
the XML Schema definition language other than the datatypes, each ·built-in·
datatype is also defined in the namespace whose URI is:
a.. http://www.w3.org/2001/XMLSchema-datatypes"
James
