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1.0 Draft
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xep-0184.xml
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xep-0184.xml
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<abstract>This document specifies an XMPP protocol extension for message receipts.</abstract>
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<abstract>This document specifies an XMPP protocol extension for message receipts.</abstract>
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&LEGALNOTICE;
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&LEGALNOTICE;
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<number>0184</number>
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<number>0184</number>
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<status>Proposed</status>
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<status>Draft</status>
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<type>Standards Track</type>
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<type>Standards Track</type>
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<sig>Standards</sig>
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<sig>Standards</sig>
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<approver>Council</approver>
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<approver>Council</approver>
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<spec>XEP-0022 (in part)</spec>
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<spec>XEP-0022 (in part)</spec>
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</supersedes>
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</supersedes>
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<supersededby/>
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<supersededby/>
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<shortname>TO BE ASSIGNED</shortname>
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<shortname>receipts</shortname>
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<schemaloc>
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<url>http://www.xmpp.org/schemas/receipts.xsd</url>
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</schemaloc>
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&stpeter;
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&stpeter;
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&hildjj;
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&hildjj;
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<revision>
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<version>1.0</version>
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<date>2007-09-26</date>
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<initials>psa</initials>
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<remark><p>Per a vote of the XMPP Council, advanced to Draft.</p></remark>
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</revision>
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<revision>
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<revision>
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<version>0.4</version>
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<version>0.4</version>
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<date>2007-05-30</date>
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<date>2007-05-30</date>
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<p>Note: This document explicitly does not define a protocol for "guaranteed delivery", since that term (like "security") means different things to different people. Instead, we define a more focused protocol that addresses the need for message receipts, thus solving one problem that falls under the heading of "guaranteed delivery".</p>
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<p>Note: This document explicitly does not define a protocol for "guaranteed delivery", since that term (like "security") means different things to different people. Instead, we define a more focused protocol that addresses the need for message receipts, thus solving one problem that falls under the heading of "guaranteed delivery".</p>
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</section1>
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</section1>
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<section1 topic='Protocol Format' anchor='format'>
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<section1 topic='Protocol Format' anchor='format'>
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<p>In order to make it possible for senders to request and for recipients to generate message receipts, we define a dedicated protocol extension qualified by the 'http://www.xmpp.org/extensions/xep-0184.html#ns' namespace &NSNOTE;.</p>
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<p>In order to make it possible for senders to request and for recipients to generate message receipts, we define a dedicated protocol extension qualified by the 'urn:xmpp:receipts' namespace &NSNOTE;.</p>
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<p>There are two allowable elements in this namespace:</p>
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<p>There are two allowable elements in this namespace:</p>
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<ul>
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<ul>
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<li><request/> -- included by a sending entity that wishes to know if the message has been received.</li>
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<li><request/> -- included by a sending entity that wishes to know if the message has been received.</li>
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id='richard2-4.1.247'
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id='richard2-4.1.247'
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to='kingrichard@royalty.england.lit/throne'>
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to='kingrichard@royalty.england.lit/throne'>
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<body>My lord, dispatch; read o'er these articles.</body>
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<body>My lord, dispatch; read o'er these articles.</body>
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<request xmlns='http://www.xmpp.org/extensions/xep-0184.html#ns'/>
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<request xmlns='urn:xmpp:receipts'/>
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</message>
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</message>
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]]></example>
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]]></example>
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<p>The recipient shall generate a receipt if and only if it supports the protocol defined herein and it is configured to return receipts, either globally or for this recipient (otherwise it MUST NOT return a receipt and SHOULD NOT return an error).</p>
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<p>The recipient shall generate a receipt if and only if it supports the protocol defined herein and it is configured to return receipts, either globally or for this recipient (otherwise it MUST NOT return a receipt and SHOULD NOT return an error).</p>
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from='kingrichard@royalty.england.lit/throne'
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from='kingrichard@royalty.england.lit/throne'
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id='richard2-4.1.247'
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id='richard2-4.1.247'
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to='northumberland@shakespeare.lit/westminster'>
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to='northumberland@shakespeare.lit/westminster'>
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<received xmlns='http://www.xmpp.org/extensions/xep-0184.html#ns'/>
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<received xmlns='urn:xmpp:receipts'/>
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</message>
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</message>
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]]></example>
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]]></example>
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<p>The <received/> element SHOULD be the only child of the &MESSAGE; stanza and MUST mirror the 'id' of the sent message.</p>
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<p>The <received/> element SHOULD be the only child of the &MESSAGE; stanza and MUST mirror the 'id' of the sent message.</p>
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</section1>
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</section1>
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<section1 topic='Determining Support' anchor='disco'>
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<section1 topic='Determining Support' anchor='disco'>
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<p>If a sender wishes to request message receipts, it SHOULD first determine whether the intended recipient supports message receipts. This can be done directly via <cite>Service Discovery</cite> or indirectly via <cite>Entity Capabilities</cite>.</p>
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<p>If a sender wishes to request message receipts, it SHOULD first determine whether the intended recipient supports message receipts. This can be done directly via <cite>Service Discovery</cite> or indirectly via <cite>Entity Capabilities</cite>.</p>
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<p>If an entity supports message receipts, it MUST report that by including a service discovery feature of "http://www.xmpp.org/extensions/xep-0184.html#ns" in response to disco#info requests &NSNOTE;:</p>
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<p>If an entity supports message receipts, it MUST report that by including a service discovery feature of "urn:xmpp:receipts" in response to disco#info requests &NSNOTE;:</p>
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<example caption="Initial Service Discovery information request"><![CDATA[
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<example caption="Initial Service Discovery information request"><![CDATA[
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<iq from='northumberland@shakespeare.lit/westminster'
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<iq from='northumberland@shakespeare.lit/westminster'
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to='kingrichard@royalty.england.lit/throne'
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to='kingrichard@royalty.england.lit/throne'
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type='result'>
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type='result'>
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<query xmlns='http://jabber.org/protocol/disco#info'>
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<query xmlns='http://jabber.org/protocol/disco#info'>
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...
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...
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<feature var='http://www.xmpp.org/extensions/xep-0184.html#ns'/>
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<feature var='urn:xmpp:receipts'/>
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...
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...
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</query>
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</query>
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</iq>
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</iq>
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]]></example>
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]]></example>
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</section1>
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</section1>
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<section1 topic='Negotiation' anchor='neg'>
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<section1 topic='Negotiation' anchor='neg'>
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<p>Two entities MAY negotiate the use of message receipts for a given session using <cite>Stanza Session Negotiation</cite>. The parameter to be negotiated is named "http://www.xmpp.org/extensions/xep-0184.html#ns" &NSNOTE;. Its use is illustrated in the following examples.</p>
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<p>Two entities MAY negotiate the use of message receipts for a given session using <cite>Stanza Session Negotiation</cite>. The parameter to be negotiated is named "urn:xmpp:receipts" &NSNOTE;. Its use is illustrated in the following examples.</p>
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<example caption="User requests chat session"><![CDATA[
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<example caption="User requests chat session"><![CDATA[
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<message type='normal'
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<message type='normal'
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from='northumberland@shakespeare.lit/westminster'
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from='northumberland@shakespeare.lit/westminster'
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</field>
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</field>
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<field label='Enable Message Receipts?'
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<field label='Enable Message Receipts?'
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type='boolean'
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type='boolean'
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var='http://www.xmpp.org/extensions/xep-0184.html#ns'>
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var='urn:xmpp:receipts'>
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<value>0</value>
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<value>0</value>
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</field>
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</field>
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</x>
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</x>
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<field var='accept'>
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<field var='accept'>
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<value>true</value>
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<value>true</value>
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</field>
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</field>
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<field var='http://www.xmpp.org/extensions/xep-0184.html#ns'>
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<field var='urn:xmpp:receipts'>
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<value>1</value>
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<value>1</value>
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</field>
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</field>
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</x>
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</x>
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</section1>
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</section1>
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<section1 topic='XMPP Registrar Considerations' anchor='registrar'>
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<section1 topic='XMPP Registrar Considerations' anchor='registrar'>
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<section2 topic='Protocol Namespaces' anchor='ns'>
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<section2 topic='Protocol Namespaces' anchor='ns'>
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<p>Until this specification advances to a status of Draft, its associated namespace shall be "http://www.xmpp.org/extensions/xep-0184.html#ns"; upon advancement of this specification, the ®ISTRAR; shall issue a permanent namespace in accordance with the process defined in Section 4 of &xep0053;.</p>
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<p>The ®ISTRAR; includes "urn:xmpp:receipts" in its registry of protocol namespaces (see &NAMESPACES;).</p>
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</section2>
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</section2>
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<section2 topic='Field Standardization' anchor='registrar-formtype'>
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<section2 topic='Field Standardization' anchor='registrar-formtype'>
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<p>&xep0068; defines a process for standardizing the fields used within Data Forms qualified by a particular namespace, and the XMPP Registrar maintains a registry of such fields (see &FORMTYPES;). The Registrar shall add the following field for use in Stanza Session Negotiation forms:</p>
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<p>&xep0068; defines a process for standardizing the fields used within Data Forms qualified by a particular namespace, and the XMPP Registrar maintains a registry of such fields (see &FORMTYPES;). The Registrar shall add the following field for use in Stanza Session Negotiation forms:</p>
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<form_type>
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<form_type>
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<name>urn:xmpp:ssn</name>
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<name>urn:xmpp:ssn</name>
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<field
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<field
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var='http://www.xmpp.org/extensions/xep-0184.html#ns'
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var='urn:xmpp:receipts'
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type='boolean'
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type='boolean'
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label='Whether to enable Message Receipts per XEP-0184'/>
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label='Whether to enable Message Receipts per XEP-0184'/>
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</form_type>
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</form_type>
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]]></code>
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]]></code>
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</section2>
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</section2>
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</section1>
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</section1>
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<section1 topic='XML Schema' anchor='schema'>
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<code><![CDATA[
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<?xml version='1.0' encoding='UTF-8'?>
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<xs:schema
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xmlns:xs='http://www.w3.org/2001/XMLSchema'
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targetNamespace='urn:xmpp:receipts'
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xmlns='urn:xmpp:receipts'
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elementFormDefault='qualified'>
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<xs:annotation>
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<xs:documentation>
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The protocol documented by this schema is defined in
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XEP-0184: http://www.xmpp.org/extensions/xep-0184.html
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</xs:documentation>
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</xs:annotation>
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<xs:element name='received' type='empty'/>
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<xs:element name='request' type='empty'/>
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<xs:simpleType name='empty'>
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<xs:restriction base='xs:string'>
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<xs:enumeration value=''/>
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</xs:restriction>
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</xs:simpleType>
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</xs:schema>
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]]></code>
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</section1>
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<section1 topic='Acknowledgements' anchor='ack'>
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<section1 topic='Acknowledgements' anchor='ack'>
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<p>Thanks to Joe Kemp and Kevin Smith for their input.</p>
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<p>Thanks to Joe Kemp and Kevin Smith for their input.</p>
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</section1>
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</section1>
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