XQuery has a type system that is based on XML Schema. Work is in progress to ensure that the type systems of XQuery, the XQuery Core, and XML Schema are completely aligned. Note that many of the powerful and structured facilities of XML Query have been recognized as so fundamental that they are going to be incorporated into the next version of XPath, namely XPath 2.0.The XQuery 1.0 and XPath 2.0 Data Model is a W3C working draft( work in progress ) that attempts to capture the strengths of these two technologies. As for the XQuery itself, it too is in the W3 working draft state right now. The first ( and the latest! ) WD XQuery 1.0 version came out on 07 June 2001. For tool support, you may have to wait a little longer. Sometime down the lane all tools that support XPath 2.0 spec will also be supporting XQuery. Hope that helps! ------------------ Ajith Kallambella M. Sun Certified Programmer for the Java�2 Platform. IBM Certified Developer - XML and Related Technologies, V1.
Open Group Certified Distinguished IT Architect. Open Group Certified Master IT Architect. Sun Certified Architect (SCEA).