W3C's role in making the Recommendation is to draw attention to the specification and to promote its widespread deployment.This enhances the functionality and interoperability of the Web.
The authors of this document are the members of the XML Schema Working Group.
Different parts of this specification have different editors.
This document was produced under the 24 January 2002 Current Patent Practice (CPP) as amended by the W3C Patent Policy Transition Procedure.
Please refer to the errata for this document, which may include some normative corrections.
This document is also available in these non-normative formats: XML, XHTML with visible change markup, Independent copy of the schema for schema documents, A schema for built-in datatypes only, in a separate namespace, and Independent copy of the DTD for schema documents. Copyright © 2004 is part 2 of the specification of the XML Schema language.
It defines facilities for defining datatypes to be used in XML Schemas as well as other XML specifications.
The datatype language, which is itself represented in XML 1.0, provides a superset of the capabilities found in XML 1.0 document type definitions (DTDs) for specifying datatypes on elements and attributes.
This section describes the status of this document at the time of its publication. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at
This is a W3C Recommendation, which forms part of the Second Edition of XML Schema.