Rules of validating email addresses
Please refer to the errata for this document, which may include some normative corrections.
The previous errata for this document, are also available. This document is also available in these non-normative formats: XML and XHTML with color-coded revision indicators.
Copyright © 2008 The Extensible Markup Language (XML) is a subset of SGML that is completely described in this document.
Its goal is to enable generic SGML to be served, received, and processed on the Web in the way that is now possible with HTML.
XML is an application profile or restricted form of SGML, the Standard Generalized Markup Language [ISO 8879].
By construction, XML documents are conforming SGML documents.
Characters with multiple possible representations in ISO/IEC 10646 (e.g.XML has been designed for ease of implementation and for interoperability with both SGML and HTML.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 edition supersedes the previous W3C Recommendation of 16 August 2006.
Please report errors in this document to the public [email protected] list; public archives are available.
This version of the XML specification may be distributed freely, as long as all text and legal notices remain intact.