<remark><p>Initial published version, incorporating Council feedback.</p></remark>
</revision>
<revision>
<version>0.0.1</version>
<date>2008-05-27</date>
<initials>psa</initials>
<remark><p>First draft, copied and modified from XEP-0211.</p></remark>
</revision>
</header>
<section1topic='Introduction'anchor='intro'>
<p>The &XSF; defines protocol suites for the purpose of compliance testing and software certification. This document specifies the 2009 compliance levels for XMPP clients. Support for the listed specifications is REQUIRED for compliance purposes.</p>
<p>Some of the protocol specifications referenced herein have their own dependencies; developers must refer to the relevant specifications for further information.</p>
<p>Developers are advised to refer to &xep0178; regarding proper implementation of the SASL EXTERNAL mechanism in XMPP.</p>