We recently implemented quite a few built in XSD numeric data types in PsychoPath XPath 2.0 processor (ref, http://www.w3.org/TR/xmlschema-2/#built-in-datatypes). Now all (I mean, really all of xs:decimal ones :)) the data types in the xs:decimal hierarchy are available in PsychoPath, and these should be available in Eclipse WTP 3.2 M1 (which should be released sometime soon after the Eclipse Galileo release, at around June 09' end).
Now almost all the major built in Schema types are available in PsychoPath, except for few subtypes of xs:string (like xs:normalizedString, xs:token etc.). These shouldn't be much difficult to add.
Dave Carver reported, that the improvements we have done recently in PsychoPath have significantly improved it's compliance to the W3C XPath 2.0 test suite.
PsychoPath processor version is now enhanced from 1.0 to 1.1.