This document explains the rules and concepts for the use of XML Namespaces in Tamino 4.2 in various areas, mainly the XML Schema-based schema definition language TSD4 and the query languages X-Query and XQuery. For reference, please see http://www.w3.org/TR/REC-xml-names/.

This document is intended to be read by administrators, application developers and other schema creators.

This document contains the following sections:

General Information on Namespaces	A general description of what namespaces are and what they are good for
Namespace-Related Facilities in XML Schema and in TSD4	The basic facilities related to namespaces in XML Schema and in TSD4.
Upgrade and Migration	Migrating from earlier versions and updating
Namespace Handling for Specific XMachine Requests	The consequences of the introduction of namespaces on collection names and doctype names

This documentation uses a lot of namespace specific terminology that might be unfamiliar to some readers. For detailed explanations of the terms used, please refer to the Tamino glossary.