From the graphics, you can see that Tamino XQuery is built upon a number of XML specifications defined by the World Wide Web Consortium (W3C). Those specifications that treat data model aspects of XQuery and define the language itself are still in draft status, which means they have not yet been passed as normative recommendations. The Tamino implementation of XQuery, called Tamino XQuery 4, follows the draft specifications as closely as possible. Currently, it implements a subset that is large enough to meet general query requirements, but also extends it by including functionality that had already been present in the implementation of its XPath 1.0-based predecessor X-Query.
This documentation refers to the suite of XQuery 1.0 specifications, published as working drafts on August 16, 2002. Any links to these specifications lead to that version. If a link refers to a draft published at another date, there is an explicit hint.
Note:
In this documentation, the unqualified term "XQuery" is
used for the Tamino implementation, which is officially called "Tamino
XQuery 4". The W3C draft specification as of August 16, 2002 is
referred to as "W3C XQuery".