XPath 1.0 supported only four data types, XPath 2.0 extends that to support not only the node kinds supported in XPath 1.0, but also many atomic types, which include the primitive simple types defined by the XML Schema specification and values whose types are derived from them by restriction in a schema.

Here is your chance to dive into the code of XPath 2.0.

Get a head start on XPath 2.0 by reviewing the new features.

Discover how to validate XML documents—with document type definitions (DTDs).