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<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE xep SYSTEM 'xep.dtd' [
<!ENTITY % ents SYSTEM 'xep.ent'>
%ents;
<!ENTITY component "<note>Support can be enabled via an external component or an internal server module/plugin. If claiming compliance using such an addition, the necessary components/modules/plugins MUST be detailed.</note>">
<!ENTITY usecases "<note>Support for the Entity Use Cases and Occupant Use Cases is REQUIRED; support for the remaining use cases is RECOMMENDED.</note>">
<!ENTITY onlyone "<note>Only one of the recommended providers must be implemented for compliance.</note>">
<!ENTITY nocli "<note>Not required for command line or terminal based interfaces.</note>">
<!ENTITY avatar "<note>While 'User Avatars' is more modern, 'vCard-Based Avatars' is more widely deployed. Although it is suggested that to maximise interoperability with existing software a client fully supports both it is sufficient to claim compliance with this suite if the support for 'vCard-Based Avatars' is read-only.</note>">
<!ENTITY pubsubjid "<note>While 'Personal Eventing Protocol' does not require all the features of 'Publish-Subscribe' to be available on the users' JIDs, and nor does this suite, it is desirable for this to be the case and it is expected that this will a requirement of future Compliance Suites.</note>">
]>
<?xml-stylesheet type='text/xsl' href='xep.xsl'?>
<xep>
<header>
<title>XMPP Compliance Suites 2019</title>
<abstract>
This document defines XMPP protocol compliance levels.
</abstract>
&LEGALNOTICE;
<number>0412</number>
<status>Draft</status>
<lastcall>2019-02-29</lastcall>
<type>Standards Track</type>
<sig>Standards</sig>
<dependencies>
<spec>RFC 6120</spec>
<spec>RFC 6121</spec>
<spec>RFC 7395</spec>
<spec>RFC 7590</spec>
<spec>RFC 7622</spec>
<spec>XEP-0030</spec>
<spec>XEP-0045</spec>
<spec>XEP-0048</spec>
<spec>XEP-0049</spec>
<spec>XEP-0084</spec>
<spec>XEP-0085</spec>
<spec>XEP-0114</spec>
<spec>XEP-0115</spec>
<spec>XEP-0124</spec>
<spec>XEP-0163</spec>
<spec>XEP-0191</spec>
<spec>XEP-0198</spec>
<spec>XEP-0206</spec>
<spec>XEP-0223</spec>
<spec>XEP-0249</spec>
<spec>XEP-0280</spec>
<spec>XEP-0313</spec>
<spec>XEP-0352</spec>
<spec>XEP-0368</spec>
</dependencies>
<supersedes>
<spec>XEP-0387</spec>
</supersedes>
<supersededby/>
<shortname>CS2019</shortname>
<author>
<firstname>Georg</firstname>
<surname>Lukas</surname>
<email>georg@op-co.de</email>
<jid>georg@yax.im</jid>
</author>
<revision>
<version>1.0.0</version>
<date>2019-04-04</date>
<initials>XEP Editor</initials>
<remark>Accepted as Draft per Council vote on 2019-03-27</remark>
</revision>
<revision>
<version>0.5.0</version>
<date>2019-03-25</date>
<initials>gl</initials>
<remark><ul><li>Taken over ownership.</li><li>Improved structure of category and level names.</li><li>Added XEP-0313 and XEP-0410 to 'Advanced Group Chat'</li></ul></remark>
</revision>
<revision>
<version>0.4.0</version>
<date>2019-01-13</date>
<initials>jsc</initials>
<remark><ul><li>Fix mess-up with TLS: TLS itself is of course required, it is just Direct TLS which is supposed to be advanced.</li><li>Add XEP-0308 (Last Message Correction) for Advanced Client</li><li>Minor typographical fixes</li></ul></remark>
</revision>
<revision>
<version>0.2.0</version>
<date>2019-01-13</date>
<initials>jsc</initials>
<remark><ul><li>Remove XEP-0184 from server support (doesn't make sense)</li><li>Do not require Avatars for Core clients</li><li>Add a note for RFC 7622 and do not require it</li><li>Do not require XEP-0368 in core servers</li></ul></remark>
</revision>
<revision>
<version>0.1.0</version>
<date>2018-12-16</date>
<initials>XEP Editor (jsc)</initials>
<remark>Accepted by vote of Council on 2018-12-19.</remark>
</revision>
<revision>
<version>0.0.1</version>
<date>2018-12-08</date>
<initials>jsc</initials>
<remark>
<p>First draft based on XEP-0378. Non-editorial Changes:</p>
<ul>
<li>Prefer XEP-0084 for Avatars, use XEP-0398 for compat.</li>
<li>Add XEP-0184</li>
</ul>
</remark>
</revision>
</header>
<section1 topic='Introduction' anchor='intro'>
<p>
The &XSF; defines protocol suites for the purpose of compliance testing
and software certification.
This document specifies compliance levels for XMPP clients and servers; it
is hoped that this document will advance the state of the art, and provide
guidance and eventual certification to XMPP client and server authors.
</p>
<p>
This document defines <strong>Categories</strong> based on
typical use cases (Core, Web, IM, Mobile) and <strong>Levels</strong>
(Core, Advanced) based on functionality in the respective category.
</p>
<p>
Unless explicitly noted, support for the listed specifications is REQUIRED
for compliance purposes.
A feature is considered supported if all comma separated feature providers
listed in the "Providers" column are implemented (unless otherwise noted).
</p>
</section1>
<section1 topic='Compliance Categories' anchor='categories'>
<section2 topic='Core Compliance Suite' anchor='core'>
<table caption='XMPP Core Compliance Levels'>
<tr>
<th>Feature</th>
<th>Core Server</th>
<th>Core Client</th>
<th>Advanced Server</th>
<th>Advanced Client</th>
<th>Providers</th>
</tr>
<tr>
<td><strong>Core features</strong></td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&rfc6120; <note>&rfc7622; is not listed due to the unclear interoperability impact of using PRECIS and Stringprep in the same ecosystem.</note></td>
</tr>
<tr>
<td><strong>TLS</strong></td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&rfc7590;</td>
</tr>
<tr>
<td><strong>Direct TLS</strong></td>
<td align='center'>&#10005;</td>
<td align='center'>&#10005;</td>
<td align='center'>&#10003;<note>Server support of XEP-0368 means having the ability to accept direct TLS connections.</note></td>
<td align='center'>&#10003;</td>
<td>&xep0368;</td>
</tr>
<tr>
<td><strong>Feature discovery</strong></td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&xep0030;</td>
</tr>
<tr>
<td><strong>Feature broadcasts</strong></td>
<td align='center'>&#10005;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&xep0115;</td>
</tr>
<tr>
<td><strong>Server Extensibility</strong></td>
<td align='center'>&#10003;</td>
<td align='center'>N/A</td>
<td align='center'>&#10003;</td>
<td align='center'>N/A</td>
<td>&xep0114;</td>
</tr>
<tr>
<td><strong>Event publishing</strong></td>
<td align='center'>&#10005;</td>
<td align='center'>&#10005;</td>
<td align='center'>&#10003;&pubsubjid;</td>
<td align='center'>&#10003;</td>
<td>&xep0163;</td>
</tr>
</table>
</section2>
<section2 topic='Web Compliance Suite' anchor='web'>
<p>
To be considered XMPP web compliant, all features from the core
compliance category must be met, as well as all features in this suite.
</p>
<table caption='XMPP Web Compliance Levels'>
<tr>
<th>Feature</th>
<th>Core Server</th>
<th>Core Client</th>
<th>Advanced Server</th>
<th>Advanced Client</th>
<th>Providers</th>
</tr>
<tr>
<td><strong>Web Connection Mechanisms</strong></td>
<td align='center'>&#10003;&component;</td>
<td align='center'>&#10003;&onlyone;</td>
<td align='center'>&#10003;&component;</td>
<td align='center'>&#10003;&onlyone;</td>
<td>&rfc7395;, &xep0206; (See also: &xep0124;)</td>
</tr>
</table>
</section2>
<section2 topic='IM Compliance Suite' anchor='im'>
<p>
To be considered XMPP IM compliant, all features from the core
compliance category must be met, as well as all features in this suite.
</p>
<table caption='XMPP IM Compliance Levels'>
<tr>
<th>Feature</th>
<th>Core Server</th>
<th>Core Client</th>
<th>Advanced Server</th>
<th>Advanced Client</th>
<th>Providers</th>
</tr>
<tr>
<td><strong>Core features</strong></td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&rfc6121;</td>
</tr>
<tr>
<td><strong>User Avatars</strong></td>
<td align='center'>N/A</td>
<td align='center'>&#10005;</td>
<td align='center'>N/A</td>
<td align='center'>&#10003;&nocli;</td>
<td>&xep0084;</td>
</tr>
<tr>
<td><strong>User Avatar Compatibility</strong></td>
<td align='center'>&#10005;</td>
<td align='center'>&#10005;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;&nocli;</td>
<td>&xep0398;, &xep0153;</td>
</tr>
<tr>
<td><strong>vcard-temp</strong></td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&xep0054;</td>
</tr>
<tr>
<td><strong>Outbound Message Synchronization</strong></td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&xep0280;</td>
</tr>
<tr>
<td><strong>User Blocking</strong></td>
<td align='center'>&#10005;</td>
<td align='center'>&#10005;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&xep0191;</td>
</tr>
<tr>
<td><strong>Group Chat</strong></td>
<td align='center'>&#10003;&component;</td>
<td align='center'>&#10003;&usecases;</td>
<td align='center'>&#10003;&component;</td>
<td align='center'>&#10003;&usecases;</td>
<td>&xep0045;<note>Implementations should take note that future versions of these compliance suites may rely on &xep0369; instead.</note>, &xep0249;</td>
</tr>
<tr>
<td><strong>Advanced Group Chat</strong></td>
<td align='center'>&#10005;</td>
<td align='center'>&#10005;</td>
<td align='center'>&#10003;&component;</td>
<td align='center'>&#10003;</td>
<td>&xep0048;, &xep0313;<note>Support for requesting history from a MUC archive as opposed to from the user's account.</note>, &xep0410;</td>
</tr>
<tr>
<td><strong>Persistent Storage of Private Data via PubSub</strong></td>
<td align='center'>&#10005;</td>
<td align='center'>&#10005;</td>
<td align='center'>&#10003;&component;</td>
<td align='center'>&#10003;</td>
<td>&xep0223;</td>
</tr>
<tr>
<td><strong>Private XML Storage</strong></td>
<td align='center'>&#10005;</td>
<td align='center'>&#10005;</td>
<td align='center'>&#10003;&component;</td>
<td align='center'>&#10003;</td>
<td>&xep0049;</td>
</tr>
<tr>
<td><strong>Session Resumption</strong></td>
<td align='center'>&#10005;</td>
<td align='center'>&#10005;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&xep0198;</td>
</tr>
<tr>
<td><strong>Stanza Acknowledgements</strong></td>
<td align='center'>&#10005;</td>
<td align='center'>&#10005;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&xep0198;</td>
</tr>
<tr>
<td><strong>Message Acknowledgements</strong></td>
<td align='center'>N/A</td>
<td align='center'>&#10005;</td>
<td align='center'>N/A</td>
<td align='center'>&#10003;</td>
<td>&xep0184;</td>
</tr>
<tr>
<td><strong>History Storage / Retrieval</strong></td>
<td align='center'>&#10005;</td>
<td align='center'>&#10005;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&xep0313;</td>
</tr>
<tr>
<td><strong>Chat States</strong></td>
<td align='center'>N/A</td>
<td align='center'>&#10005;</td>
<td align='center'>N/A</td>
<td align='center'>&#10003;</td>
<td>&xep0085;</td>
</tr>
<tr>
<td><strong>Message Correction</strong></td>
<td align='center'>N/A</td>
<td align='center'>&#10005;</td>
<td align='center'>N/A</td>
<td align='center'>&#10003;</td>
<td>&xep0308;</td>
</tr>
</table>
</section2>
<section2 topic='Mobile Compliance Suite' anchor='mobile'>
<p>
To be considered XMPP mobile compliant, all features from the core
compliance category must be met, as well as all features in this suite.
</p>
<table caption='XMPP Mobile Compliance Levels'>
<tr>
<th>Feature</th>
<th>Core Server</th>
<th>Core Client</th>
<th>Advanced Server</th>
<th>Advanced Client</th>
<th>Providers</th>
</tr>
<tr>
<td><strong>Session Resumption</strong></td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&xep0198;</td>
</tr>
<tr>
<td><strong>Stanza Acknowledgements</strong></td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&xep0198;</td>
</tr>
<tr>
<td><strong>Client State Indication</strong></td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td align='center'>&#10003;</td>
<td>&xep0352;</td>
</tr>
<tr>
<td><strong>Third Party Push Notifications</strong></td>
<td align='center'>&#10005;</td>
<td align='center'>&#10005;</td>
<td align='center'>&#10003;&component;</td>
<td align='center'>&#10003;</td>
<td>&xep0357;</td>
</tr>
</table>
</section2>
</section1>
<section1 topic='Implementation Notes' anchor='impl'>
<p>
Some of the protocol specifications referenced herein have their own
dependencies; developers need to consult the relevant specifications for
further information.
</p>
</section1>
<section1 topic='Security Considerations' anchor='security'>
<p>
This document introduces no additional security considerations above and
beyond those defined in the documents on which it depends.
</p>
</section1>
<section1 topic='IANA Considerations' anchor='iana'>
<p>This document requires no interaction with &IANA;.</p>
</section1>
<section1 topic='XMPP Registrar Considerations' anchor='registrar'>
<p>This document requires no interaction with the &REGISTRAR;.</p>
</section1>
<section1 topic='Acknowledgements' anchor='ack'>
<p>
The author would like to thank Guus der Kinderen, Dele Olajide, Marc
Laporte, Dave Cridland, Daniel Gultsch, Florian Schmaus, Tobias Markmann,
and Jonas Schäfer for their suggestions.
</p>
</section1>
</xep>