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RFC 6501

 
 
 

Conference Information Data Model for Centralized Conferencing (XCON)

Part 4 of 4, p. 56 to 94
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Appendix A.  Non-Normative RELAX NG Schema in XML Syntax

 <?xml version="1.0" encoding="UTF-8" ?>
    <grammar
           ns="urn:ietf:params:xml:ns:conference-info"
           xmlns="http://relaxng.org/ns/structure/1.0"
           xmlns:xcon="urn:ietf:params:xml:ns:xcon-conference-info"
           datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
           <start>
            <element name="conference-info">
             <ref name="conference-type"/>
            </element>
           </start>
           <!--
               CONFERENCE TYPE

           -->
           <define name="conference-type">
            <interleave>
            <attribute name="entity">
             <text/>
            </attribute>
            <ref name="anyAttribute"/>
            <optional>
             <ref name="conference-description-type"/>
            </optional>
            <optional>
             <element name="host-info">
              <ref name="host-type"/>
             </element>
            </optional>
            <optional>
             <element name="conference-state">
              <ref name="conference-state-type"/>
             </element>
            </optional>
            <optional>
             <element name="users">
              <ref name="users-type"/>
             </element>
            </optional>
            <optional>
             <element name="sidebars-by-ref">
              <ref name="uris-type"/>
             </element>
            </optional>
            <optional>
             <element name="sidebars-by-val">

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              <ref name="sidebars-by-val-type"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:floor-information">
              <ref name="floor-information-type"/>
             </element>
            </optional>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               CONFERENCE DESCRIPTION TYPE
           -->
           <define name="conference-description-type">
            <element name="conference-description">
             <interleave>
             <optional>
              <attribute name="xml:lang">
               <data type="language"/>
              </attribute>
             </optional>
             <ref name="anyAttribute"/>
             <optional>
              <element name="display-text">
               <text/>
              </element>
             </optional>
             <optional>
              <element name="subject">
               <text/>
              </element>
             </optional>
             <optional>
              <element name="free-text">
               <text/>
              </element>
             </optional>
             <optional>
              <element name="keywords">
               <list>
                <zeroOrMore>
                 <data type="string"/>
                </zeroOrMore>
               </list>
              </element>

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             </optional>
             <optional>
              <element name="conf-uris">
               <ref name="uris-type"/>
              </element>
             </optional>
             <optional>
              <element name="service-uris">
                 <ref name="uris-type"/>
              </element>
             </optional>
             <optional>
              <element name="maximum-user-count">
               <data type="int"/>
              </element>
             </optional>
             <optional>
              <element name="available-media">
               <ref name="conference-media-type"/>
              </element>
             </optional>
             <optional>
              <element name="xcon:language">
               <data type="language"/>
              </element>
             </optional>
             <optional>
              <element name="xcon:allow-sidebars">
               <data type="boolean"/>
              </element>
             </optional>
             <optional>
             <element name="xcon:cloning-parent">
              <data type="anyURI"/>
             </element>
             </optional>
             <optional>
             <element name="xcon:sidebar-parent">
              <data type="anyURI"/>
             </element>
             </optional>
             <optional>
              <element name="xcon:conference-time">
               <ref name="conferencetime-type"/>
              </element>
             </optional>
             <zeroOrMore>
              <ref name="anyElement"/>

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             </zeroOrMore>
             </interleave>
            </element>
           </define>
           <!--
               HOST TYPE
           -->
           <define name="host-type">
            <interleave>
            <optional>
             <element name="display-text">
              <text/>
             </element>
            </optional>
            <optional>
             <element name="web-page">
              <data type="anyURI"/>
             </element>
            </optional>
            <optional>
             <element name="uris">
              <ref name="uris-type"/>
             </element>
            </optional>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            <ref name="anyAttribute"/>
            </interleave>
           </define>
           <!--
               CONFERENCE STATE TYPE
           -->
           <define name="conference-state-type">
            <interleave>
            <ref name="anyAttribute"/>
            <optional>
             <element name="user-count">
              <data type="unsignedInt"/>
             </element>
            </optional>
            <optional>
             <element name="active">
              <data type="boolean"/>
             </element>
            </optional>
            <optional>
             <element name="locked">

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              <data type="boolean"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:allow-conference-event-subscription">
              <data type="boolean"/>
             </element>
            </optional>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               CONFERENCE MEDIA TYPE
           -->
           <define name="conference-media-type">
            <interleave>
            <ref name="anyAttribute"/>
            <zeroOrMore>
             <element name="entry">
              <ref name="conference-medium-type"/>
             </element>
            </zeroOrMore>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               CONFERENCE MEDIUM TYPE
           -->
           <define name="conference-medium-type">
            <interleave>
            <attribute name="label">
             <text/>
            </attribute>
            <ref name="anyAttribute"/>
            <optional>
             <element name="display-text">
              <text/>
             </element>
            </optional>
            <optional>
             <element name="type">
              <text/>
             </element>
            </optional>

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            <optional>
             <element name="status">
              <ref name="media-status-type"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:mixing-mode">
              <ref name="mixing-mode-type"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:codecs">
              <ref name="codecs-type"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:controls">
              <ref name="control-type"/>
             </element>
            </optional>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               URIs TYPE
           -->
           <define name="uris-type">
            <interleave>
            <ref name="anyAttribute"/>
            <zeroOrMore>
             <element name="entry">
              <ref name="uri-type"/>
             </element>
            </zeroOrMore>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               URI TYPE
           -->
           <define name="uri-type">
            <interleave>
            <element name="uri">
             <data type="anyURI"/>

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            </element>
            <optional>
             <element name="display-text">
              <text/>
             </element>
            </optional>
            <optional>
             <element name="purpose">
              <text/>
             </element>
            </optional>
            <optional>
             <element name="modified">
              <ref name="execution-type"/>
             </element>
            </optional>
            <zeroOrMore>
             <element name="xcon:conference-password">
              <text/>
             </element>
            </zeroOrMore>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            <ref name="anyAttribute"/>
           </interleave>

           </define>
           <!--
               USERS TYPE
           -->
           <define name="users-type">
            <interleave>
            <ref name="anyAttribute"/>
            <zeroOrMore>
             <element name="user">
              <ref name="user-type"/>
             </element>
            </zeroOrMore>
            <optional>
             <element name="xcon:join-handling">
              <ref name="join-handling-type"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:user-admission-policy">
              <ref name="user-admission-policy-type"/>
             </element>

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            </optional>
            <optional>
             <element name="xcon:allowed-users-list">
              <ref name="allowed-users-list-type"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:deny-users-list">
              <ref name="deny-user-list-type"/>
             </element>
            </optional>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               USER TYPE
           -->
           <define name="user-type">
            <interleave>
            <attribute name="entity">
             <data type="anyURI"/>
            </attribute>
            <ref name="anyAttribute"/>
            <optional>
             <element name="display-text">
              <text/>
             </element>
            </optional>
            <optional>
             <element name="associated-aors">
               <ref name="uris-type"/>
             </element>
            </optional>
            <optional>
             <element name="roles">
              <oneOrMore>
               <element name="entry">
                <ref name="single-role-type"/>
               </element>
              </oneOrMore>
             </element>
            </optional>
            <optional>
             <element name="languages">
              <list>
               <data type="language"/>

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              </list>
             </element>
            </optional>
            <optional>
             <element name="cascaded-focus">
              <data type="anyURI"/>
             </element>
            </optional>
            <zeroOrMore>
             <element name="endpoint">
              <ref name="endpoint-type"/>
             </element>
            </zeroOrMore>
            <optional>
             <element name="xcon:provide-anonymity">
              <ref name="provide-anonymity-type"/>
             </element>
            </optional>
           <optional>
             <element name="xcon:allow-refer-users-dynamically">
              <data type="boolean"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:allow-invite-users-dynamically">
              <data type="boolean"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:allow-remove-users-dynamically">
              <data type="boolean"/>
             </element>
            </optional>
             <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               ENDPOINT TYPE
           -->
           <define name="endpoint-type">
            <interleave>
            <attribute name="entity">
             <text/>
            </attribute>
            <ref name="anyAttribute"/>
            <optional>

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             <element name="display-text">
              <text/>
             </element>
            </optional>
            <optional>
             <element name="referred">
               <ref name="execution-type"/>
             </element>
            </optional>
            <optional>
             <element name="status">
              <ref name="endpoint-status-type"/>
             </element>
            </optional>
            <optional>
             <element name="joining-method">
              <ref name="joining-type"/>
             </element>
            </optional>
            <optional>
             <element name="joining-info">
               <ref name="execution-type"/>
             </element>
            </optional>
            <optional>
             <element name="disconnection-method">
              <ref name="disconnection-type"/>
             </element>
            </optional>
            <optional>
             <element name="disconnection-info">
              <ref name="execution-type"/>
             </element>
            </optional>
            <zeroOrMore>
             <element name="media">
              <ref name="media-type"/>
             </element>
            </zeroOrMore>
            <optional>
             <element name="call-info">
              <ref name="call-type"/>
             </element>
            </optional>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>

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           </define>
           <!--
               ENDPOINT STATUS TYPE
           -->
           <define name="endpoint-status-type">
            <choice>
             <value>pending</value>
             <value>dialing-out</value>
             <value>dialing-in</value>
             <value>alerting</value>
             <value>on-hold</value>
             <value>connected</value>
             <value>muted-via-focus</value>
             <value>disconnecting</value>
             <value>disconnected</value>
             <ref name="free-text-extension"/>
            </choice>
           </define>
           <!--
               JOINING TYPE
           -->
           <define name="joining-type">
            <choice>
             <value>dialed-in</value>
             <value>dialed-out</value>
             <value>focus-owner</value>
             <ref name="free-text-extension"/>
            </choice>
           </define>
           <!--
               DISCONNECTION TYPE
           -->
           <define name="disconnection-type">
            <choice>
             <value>departed</value>
             <value>booted</value>
             <value>failed</value>
             <value>busy</value>
             <ref name="free-text-extension"/>
            </choice>
           </define>
           <!--
               EXECUTION TYPE
           -->
           <define name="execution-type">
            <interleave>
            <optional>
             <element name="when">

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              <data type="dateTime"/>
             </element>
            </optional>
            <optional>
             <element name="reason">
              <text/>
             </element>
            </optional>
            <optional>
             <element name="by">
              <data type="anyURI"/>
             </element>
            </optional>
            <ref name="anyAttribute"/>
            </interleave>
           </define>
           <!--
               CALL TYPE
           -->
           <define name="call-type">
            <interleave>
             <element name="sip">
              <ref name="sip-dialog-id-type"/>
             </element>
             <zeroOrMore>
              <ref name="anyElement"/>
             </zeroOrMore>
             <ref name="anyAttribute"/>
            </interleave>
           </define>
           <!--
               SIP DIALOG ID TYPE
           -->
           <define name="sip-dialog-id-type">


            <interleave>
            <optional>
            <element name="display-text">
             <text/>
            </element>
            </optional>
            <element name="call-id">
             <text/>
            </element>
            <element name="from-tag">
             <text/>
            </element>

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            <element name="to-tag">
             <text/>
            </element>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            <ref name="anyAttribute"/>
            </interleave>
           </define>
           <!--
               MEDIA TYPE
           -->
           <define name="media-type">
            <interleave>
            <attribute name="id">
             <data type="int"/>
            </attribute>
            <ref name="anyAttribute"/>
            <optional>
             <element name="display-text">
              <text/>
             </element>
            </optional>
            <optional>
             <element name="type">
              <text/>
             </element>
            </optional>
            <optional>
             <element name="label">
              <text/>
             </element>
            </optional>
            <optional>
             <element name="src-id">
              <text/>
             </element>
            </optional>
            <optional>
             <element name="status">
              <ref name="media-status-type"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:to-mixer">
              <ref name="mixer-type"/>
             </element>
            </optional>

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            <optional>
             <element name="xcon:from-mixer">
              <ref name="mixer-type"/>
             </element>
            </optional>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               MEDIA STATUS TYPE
           -->
           <define name="media-status-type">
            <choice>
             <value>recvonly</value>
             <value>sendonly</value>
             <value>sendrecv</value>
             <value>inactive</value>
             <ref name="free-text-extension"/>
            </choice>
           </define>
           <!--
               SIDEBARS-BY-VAL TYPE
           -->
           <define name="sidebars-by-val-type">
            <interleave>
            <ref name="anyAttribute"/>
            <zeroOrMore>
             <element name="entry">
              <ref name="conference-type"/>
             </element>
            </zeroOrMore>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               CONFERENCE TIME
           -->
           <define name="conferencetime-type">
            <interleave>
            <ref name="anyAttribute"/>
            <zeroOrMore>
             <element name="xcon:entry">
              <element name="xcon:base">
               <text/>

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              </element>
              <optional>
               <element name="xcon:mixing-start-offset">
                 <ref name="time-type"/>
                 <attribute name="required-participant">
                  <ref name="single-role-type"/>
                 </attribute>
                <ref name="anyAttribute"/>
               </element>
              </optional>
              <optional>
               <element name="xcon:mixing-end-offset">
                <ref name="time-type"/>
                <attribute name="required-participant">
                 <ref name="single-role-type"/>
                </attribute>
                <ref name="anyAttribute"/>
               </element>
              </optional>
              <optional>
               <element name="xcon:can-join-after-offset">
                <ref name="time-type"/>
               </element>
              </optional>
              <optional>
               <element name="xcon:must-join-before-offset">
                <ref name="time-type"/>
               </element>
              </optional>
              <optional>
               <element name="xcon:request-user">
                <ref name="time-type"/>
               </element>
              </optional>
              <optional>
               <element name="xcon:notify-end-of-conference">
                <data type="nonNegativeInteger"/>
               </element>
              </optional>
              <optional>
               <element name="xcon:allowed-extend-mixing-end-offset">
                <data type="boolean"/>
               </element>
              </optional>
              <zeroOrMore>
               <ref name="anyElement"/>
              </zeroOrMore>
             </element>

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            </zeroOrMore>
            </interleave>
           </define>
           <!--
               TIME TYPE
           -->
           <define name="time-type">
             <data type="dateTime">
               <param name="pattern">.+T.+Z.*</param>
             </data>
           </define>
           <!--
               SINGLE ROLE TYPE
           -->
           <define name="single-role-type">
            <choice>
             <value type="string">none</value>
             <value type="string">administrator</value>
             <value type="string">moderator</value>
             <value type="string">user</value>
             <value type="string">observer</value>
             <value type="string">participant</value>
             <ref name="free-text-extension"/>
            </choice>
           </define>
           <!--
               MIXING MODE TYPE
           -->
           <define name="mixing-mode-type">
            <choice>
             <value type="string">moderator-controlled</value>
             <value type="string">FCFS</value>
             <value type="string">automatic</value>
             <ref name="free-text-extension"/>
            </choice>
           </define>
           <!--
               CODECS TYPE
           -->
           <define name="codecs-type">
            <interleave>
            <attribute name="decision">
             <ref name="decision-type"/>
            </attribute>
            <ref name="anyAttribute"/>
            <zeroOrMore>
             <element name="xcon:codec">
              <ref name="codec-type"/>

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             </element>
            </zeroOrMore>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               CODEC TYPE
           -->
           <define name="codec-type">
            <interleave>
            <attribute name="name">
             <text/>
            </attribute>
            <attribute name="policy">
             <ref name="policy-type"/>
            </attribute>
            <ref name="anyAttribute"/>
            <optional>
             <element name="xcon:subtype">
              <text/>
             </element>
            </optional>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               DECISION TYPE
           -->
           <define name="decision-type">
            <choice>
             <value type="string">automatic</value>
             <value type="string">moderator-controlled</value>
             <ref name="free-text-extension"/>
            </choice>
           </define>
           <!--
               POLICY TYPE
           -->
           <define name="policy-type">
            <choice>
             <value type="string">allowed</value>
             <value type="string">disallowed</value>
             <ref name="free-text-extension"/>
            </choice>

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           </define>
           <!--
               CONTROL TYPE
           -->
           <define name="control-type">
            <interleave>
            <ref name="anyAttribute"/>
            <optional>
             <element name="xcon:mute">
              <data type="boolean"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:pause-video">
              <data type="boolean"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:gain">
              <ref name="gain-type"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:video-layout">
              <ref name="video-layout-type"/>
             </element>
            </optional>

            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               GAIN TYPE
           -->
           <define name="gain-type">
             <data type="int">
               <param name="minInclusive">-127</param>
               <param name="maxInclusive">127</param>
             </data>
           </define>
           <!--
               VIDEO LAYOUT TYPE
           -->

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           <define name="video-layout-type">
              <choice>
               <value type="string">single-view</value>
               <value type="string">dual-view</value>
               <value type="string">dual-view-crop</value>
               <value type="string">dual-view-2x1</value>
               <value type="string">dual-view-2x1-crop</value>
               <value type="string">quad-view</value>
               <value type="string">multiple-3x3</value>
               <value type="string">multiple-4x4</value>
               <value type="string">multiple-5x1</value>
               <value type="string">automatic</value>
               <ref name="free-text-extension"/>
              </choice>
           </define>
           <!--
               FLOOR INFORMATION TYPE
           -->
           <define name="floor-information-type">
            <interleave>
            <ref name="anyAttribute"/>
            <optional>
             <element name="xcon:conference-ID">
              <data type="unsignedLong"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:allow-floor-events">
              <data type="boolean"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:floor-request-handling">
              <ref name="floor-request-type"/>
             </element>
            </optional>
            <optional>
             <element name="xcon:conference-floor-policy">
              <ref name="conference-floor-policy"/>
             </element>
            </optional>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               FLOOR REQUEST TYPE

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           -->
           <define name="floor-request-type">
            <choice>
             <value type="string">block</value>
             <value type="string">confirm</value>
             <ref name="free-text-extension"/>
            </choice>
           </define>
           <!--
               CONFERENCE FLOOR POLICY
           -->
           <define name="conference-floor-policy">
            <interleave>
            <ref name="anyAttribute"/>
            <oneOrMore>
             <element name="xcon:floor">
              <interleave>
              <attribute name="id">
               <text/>
              </attribute>
              <ref name="anyAttribute"/>
              <oneOrMore>
               <element name="xcon:media-label">
                <data type="nonNegativeInteger"/>
               </element>
              </oneOrMore>
              <optional>
               <element name="xcon:algorithm">
                <ref name="algorithm-type"/>
               </element>
              </optional>
              <optional>
               <element name="xcon:max-floor-users">
                <data type="nonNegativeInteger"/>
               </element>
              </optional>
              <optional>
               <element name="xcon:moderator-id">
                <data type="nonNegativeInteger"/>
               </element>
              </optional>
              <zeroOrMore>
               <ref name="anyElement"/>
              </zeroOrMore>
              </interleave>
             </element>
            </oneOrMore>
            </interleave>

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           </define>
           <!--
               ALGORITHM POLICY
           -->
           <define name="algorithm-type">
            <choice>
             <value type="string">moderator-controlled</value>
             <value type="string">FCFS</value>
             <value type="string">random</value>
             <ref name="free-text-extension"/>
            </choice>
           </define>
           <!--
               USERS ADMISSION POLICY
           -->
           <define name="user-admission-policy-type">
            <choice>
             <value type="string">closedAuthenticated</value>
             <value type="string">openAuthenticated</value>
             <value type="string">anonymous</value>
             <ref name="free-text-extension"/>
            </choice>

           </define>
           <!--
               JOIN HANDLING TYPE
           -->
           <define name="join-handling-type">
            <choice>
             <value type="string">block</value>
             <value type="string">confirm</value>
             <value type="string">allow</value>
             <value type="string">authenticate</value>
             <value type="string">directed-operator</value>
             <ref name="free-text-extension"/>
            </choice>
           </define>
           <!--
               DENY USERLIST
           -->
           <define name="deny-user-list-type">
            <interleave>
            <ref name="anyAttribute"/>
            <zeroOrMore>
             <element name="xcon:target">
              <attribute name="uri">
               <data type="anyURI"/>
              </attribute>

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              <ref name="anyAttribute"/>
             </element>
            </zeroOrMore>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               ALLOWED USERS LIST TYPE
           -->
           <define name="allowed-users-list-type">
            <interleave>
            <ref name="anyAttribute"/>
            <zeroOrMore>
             <element name="xcon:target">
              <ref name="target-type"/>
             </element>
            </zeroOrMore>
            <optional>
             <element name="xcon:persistent-list">
              <ref name="persistent-list-type"/>
             </element>
            </optional>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               PERSISTENT LIST TYPE
           -->
           <define name="persistent-list-type">
            <interleave>
              <zeroOrMore>
               <element name="xcon:user">
                <interleave>
                <attribute name="name">
                 <text/>
                </attribute>
                <attribute name="nickname">
                 <text/>
                </attribute>
                <attribute name="id">
                 <text/>
                </attribute>
                <ref name="anyAttribute"/>
                <zeroOrMore>

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                 <element name="xcon:e-mail">
                  <text/>
                 </element>
                </zeroOrMore>
                <zeroOrMore>
                 <ref name="anyElement"/>
                </zeroOrMore>
                </interleave>
               </element>
             </zeroOrMore>
             <zeroOrMore>
              <ref name="anyElement"/>
             </zeroOrMore>
            </interleave>
           </define>
           <!--
               TARGET TYPE
           -->
           <define name="target-type">
            <attribute name="uri">
             <data type="anyURI"/>
            </attribute>
            <attribute name="method">
             <ref name="method-type"/>
            </attribute>
            <ref name="anyAttribute"/>
           </define>
           <!--
               METHOD TYPE
           -->
           <define name="method-type">
            <choice>
             <value type="string">dial-in</value>
             <value type="string">dial-out</value>
             <value type="string">refer</value>
             <ref name="free-text-extension"/>
            </choice>
           </define>
           <!--
               ANONYMITY TYPE
           -->
           <define name="provide-anonymity-type">
              <choice>
               <value>private</value>
               <value>semi-private</value>
               <value>hidden</value>
               <ref name="free-text-extension"/>
              </choice>

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           </define>
           <!--
               MIXER TYPE
           -->
           <define name="mixer-type">
            <interleave>
            <attribute name="name">
             <ref name="mixer-name-type"/>
            </attribute>

            <ref name="anyAttribute"/>
            <zeroOrMore>
             <element name="xcon:floor">
              <attribute name="id">
               <text/>
              </attribute>
              <ref name="anyAttribute"/>
              <data type="boolean"/>
             </element>
            </zeroOrMore>
            <zeroOrMore>
             <element name="xcon:controls">
              <ref name="control-type"/>
             </element>
            </zeroOrMore>
            <zeroOrMore>
             <ref name="anyElement"/>
            </zeroOrMore>
            </interleave>
           </define>
           <!--
               MIXER NAME TYPE
           -->
           <define name="mixer-name-type">
             <choice>
              <value>VideoIn</value>
              <value>VideoOut</value>
              <value>AudioOut</value>
              <value>AudioIn</value>
              <ref name="free-text-extension"/>
             </choice>
           </define>
           <!--
               FREE TEXT EXTENSION
           -->
           <define name="free-text-extension">
            <text/>
           </define>

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           <!--
            *********************************
            EXTENSIBILITY OF THE SCHEMA
            *********************************
           -->
           <!--
               EXTENSIBILITY ELEMENTS
           -->
           <define name="anyElement">
            <element>
             <anyName>
              <except>
               <name>conference-description</name>
               <name>host-info</name>
               <name>conference-state</name>
               <name>users</name>
               <name>sidebars-by-ref</name>
               <name>sidebars-by-val</name>
               <name>display-text</name>
               <name>subject</name>
               <name>free-text</name>
               <name>keywords</name>
               <name>conf-uris</name>
               <name>service-uris</name>
               <name>maximum-user-count</name>
               <name>available-media</name>
               <name>web-page</name>
               <name>uris</name>
               <name>uri</name>
               <name>user-count</name>
               <name>active</name>
               <name>locked</name>
               <name>entry</name>
               <name>type</name>
               <name>status</name>
               <name>purpose</name>
               <name>modified</name>
               <name>user</name>
               <name>associated-aors</name>
               <name>roles</name>
               <name>languages</name>
               <name>cascaded-focus</name>
               <name>endpoint</name>
               <name>referred</name>
               <name>joining-method</name>
               <name>joining-info</name>
               <name>disconnection-method</name>
               <name>disconnection-info</name>

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               <name>media</name>
               <name>call-info</name>
               <name>when</name>
               <name>reason</name>
               <name>by</name>
               <name>sip</name>
               <name>call-id</name>
               <name>from-tag</name>
               <name>to-tag</name>
               <name>label</name>
               <name>src-id</name>
               <name>xcon:conference-password</name>
               <name>xcon:mixing-mode</name>
               <name>xcon:codecs</name>
               <name>xcon:controls</name>
               <name>xcon:language</name>
               <name>xcon:allow-sidebars</name>
               <name>xcon:cloning-parent</name>
               <name>xcon:sidebar-parent</name>
               <name>xcon:allow-conference-event-subscription</name>
               <name>xcon:to-mixer</name>
               <name>xcon:provide-anonymity</name>
               <name>xcon:allow-refer-users-dynamically</name>
               <name>xcon:allow-invite-users-dynamically</name>
               <name>xcon:allow-remove-users-dynamically</name>
               <name>xcon:from-mixer</name>
               <name>xcon:join-handling</name>
               <name>xcon:user-admission-policy</name>
               <name>xcon:allowed-users-list</name>
               <name>xcon:deny-users-list</name>
               <name>xcon:floor-information</name>
               <name>xcon:conference-time</name>
               <name>xcon:provide-anonymity</name>
               <name>xcon:floor</name>
               <name>xcon:entry</name>
               <name>xcon:mixing-start-offset</name>
               <name>xcon:mixing-end-offset</name>
               <name>xcon:can-join-after-offset</name>
               <name>xcon:must-join-before-offset</name>
               <name>xcon:request-user</name>
               <name>xcon:notify-end-of-conference</name>
               <name>xcon:allowed-extend-mixing-end-offset</name>
               <name>xcon:codec</name>
               <name>xcon:subtype</name>
               <name>xcon:mute</name>
               <name>xcon:pause-video</name>
               <name>xcon:gain</name>
               <name>xcon:video-layout</name>

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               <name>xcon:conference-ID</name>
               <name>xcon:allow-floor-events</name>
               <name>xcon:floor-request-handling</name>
               <name>xcon:conference-floor-policy</name>
               <name>xcon:media-label</name>
               <name>xcon:algorithm</name>
               <name>xcon:max-floor-users</name>
               <name>xcon:moderator-id</name>
               <name>xcon:target</name>
               <name>xcon:persistent-list</name>
               <name>xcon:e-mail</name>
               <name>xcon:user</name>
              </except>
             </anyName>
             <ref name="anyExtension"/>
            </element>
           </define>

           <define name="anyExtension">
            <zeroOrMore>
             <choice>
              <attribute>
               <anyName/>
              </attribute>
              <ref name="any"/>
             </choice>
            </zeroOrMore>
           </define>

           <define name="any">
            <element>
             <anyName/>
             <zeroOrMore>
              <choice>
               <attribute>
                <anyName/>
               </attribute>
               <text/>
               <ref name="any"/>
              </choice>
             </zeroOrMore>
           </element>
           </define>

           <!--
               EXTENSIBILITY ATTRIBUTES
           -->

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           <define name="anyAttribute">
            <zeroOrMore>
             <attribute>
              <anyName>
               <except>
                <name ns="http://www.w3.org/XML/1998/namespace">lang
                </name>
                <name ns="">entity</name>
                <name ns="">required-participant</name>
                <name ns="">label</name>
                <name ns="">decision</name>
                <name ns="">name</name>
                <name ns="">policy</name>
                <name ns="">uri</name>
                <name ns="">method</name>
                <name ns="">id</name>
                <name ns="">nickname</name>
               </except>
              </anyName>
             </attribute>
            </zeroOrMore>
           </define>
          </grammar>

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Appendix B.  Non-Normative W3C XML Schema

   The non-normative W3C XML schema defines extension elements in the
   "urn:ietf:params:xml:ns:xcon-conference-info" namespace.  Note that
   <xs:any> extensions in this schema are stricter than in the normative
   RELAX NG schema [RELAX], and the normative RELAX NG schema [RELAX]
   allows unordered child elements unlike this schema (and the [RFC4575]
   schema).  Also, note that this schema allows otherwise valid
   extension elements to appear in the non-allowed positions.  Likewise,
   the cardinalities of these extension elements cannot be constrained
   with this schema.

<?xml version="1.0" encoding="UTF-8"?>
  <xs:schema
     xmlns="urn:ietf:params:xml:ns:xcon-conference-info"
     xmlns:info="urn:ietf:params:xml:ns:conference-info"
     xmlns:xs="http://www.w3.org/2001/XMLSchema"
     attributeFormDefault="unqualified" elementFormDefault="qualified"
     targetNamespace="urn:ietf:params:xml:ns:xcon-conference-info">

    <xs:import namespace="urn:ietf:params:xml:ns:conference-info"
      schemaLocation="rfc4575.xsd"/>

    <xs:import namespace="http://www.w3.org/XML/1998/namespace"
      schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>

    <xs:element name="mixing-mode" type="mixing-mode-type"/>
    <xs:element name="codecs" type="codecs-type"/>
    <xs:element name="conference-password" type="xs:string"/>
    <xs:element name="controls" type="controls-type"/>
    <xs:element name="language" type="xs:language"/>
    <xs:element name="allow-sidebars" type="xs:boolean"/>
    <xs:element name="cloning-parent" type="xs:anyURI"/>
    <xs:element name="sidebar-parent" type="xs:anyURI"/>
    <xs:element name="conference-time" type="conference-time-type"/>
    <xs:element name="allow-conference-event-subscription"
      type="xs:boolean"/>
    <xs:element name="to-mixer" type="mixer-type"/>
    <xs:element name="provide-anonymity"
      type="provide-anonymity-type"/>
    <xs:element name="allow-refer-users-dynamically"
      type="xs:boolean"/>
    <xs:element name="allow-invite-users-dynamically"
      type="xs:boolean"/>
    <xs:element name="allow-remove-users-dynamically"
      type="xs:boolean"/>
    <xs:element name="from-mixer" type="mixer-type"/>
    <xs:element name="join-handling" type="join-handling-type"/>

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    <xs:element name="user-admission-policy"
      type="user-admission-policy-type"/>
    <xs:element name="allowed-users-list"
      type="allowed-users-list-type"/>
    <xs:element name="deny-users-list" type="deny-users-list-type"/>
    <xs:element name="floor-information" type="floor-information-type"/>

    <!-- CONFERENCE TIME -->

    <xs:complexType name="conference-time-type">
      <xs:sequence>
        <xs:element name="entry"
          minOccurs="0" maxOccurs="unbounded">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="base"
                type="xs:string" minOccurs="1"/>
              <xs:element name="mixing-start-offset" minOccurs="0">
                <xs:complexType>
                  <xs:simpleContent>
                    <xs:extension base="time-type">
                     <xs:attribute name="required-participant"
                       type="role-type" use="required"/>
                      <xs:anyAttribute namespace="##any"
                        processContents="lax"/>
                    </xs:extension>
                  </xs:simpleContent>
                </xs:complexType>
              </xs:element>
              <xs:element name="mixing-end-offset" minOccurs="0">
                <xs:complexType>
                  <xs:simpleContent>
                    <xs:extension base="time-type">
                      <xs:attribute name="required-participant"
                        type="role-type" use="required"/>
                      <xs:anyAttribute namespace="##any"
                        processContents="lax"/>
                    </xs:extension>
                  </xs:simpleContent>
                </xs:complexType>
              </xs:element>
              <xs:element name="can-join-after-offset" type="time-type"
                minOccurs="0"/>
              <xs:element name="must-join-before-offset"
                type="time-type" minOccurs="0"/>
              <xs:element name="request-user" type="time-type"
                minOccurs="0"/>
              <xs:element name="notify-end-of-conference"

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                type="xs:nonNegativeInteger" minOccurs="0"/>
              <xs:element name="allowed-extend-mixing-end-offset"
                type="xs:boolean" minOccurs="0"/>
              <xs:any namespace="##other" processContents="lax"
                minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
        <xs:any namespace="##other" processContents="lax"
          minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:anyAttribute namespace="##any" processContents="lax"/>
    </xs:complexType>

    <!-- TIME TYPE -->

     <xs:simpleType name="time-type">
      <xs:restriction base="xs:dateTime">
        <xs:pattern value=".+T.+Z.*"/>
       </xs:restriction>
     </xs:simpleType>

    <!-- ROLE-TYPE -->

    <xs:simpleType name="role-type">
     <xs:restriction base="xs:string">
      <xs:pattern value="none"/>
      <xs:pattern value="administrator"/>
      <xs:pattern value="moderator"/>
      <xs:pattern value="user"/>
      <xs:pattern value="observer"/>
      <xs:pattern value="participant"/>
      <xs:pattern value=".+"/>
     </xs:restriction>
    </xs:simpleType>

    <!-- MIXING MODE TYPE -->

    <xs:simpleType name="mixing-mode-type">
      <xs:restriction base="xs:string">
        <xs:pattern value="moderator-controlled"/>
        <xs:pattern value="FCFS"/>
        <xs:pattern value="automatic"/>
        <xs:pattern value=".+"/>
      </xs:restriction>
    </xs:simpleType>

    <!-- CODECS TYPE -->

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    <xs:complexType name="codecs-type">
      <xs:sequence>
        <xs:element name="codec" type="codec-type"/>
        <xs:any namespace="##other" processContents="lax"
          minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:attribute name="decision"
        type="decision-type" use="required"/>
      <xs:anyAttribute namespace="##any" processContents="lax"/>
    </xs:complexType>

    <!-- CODEC TYPE -->

    <xs:complexType name="codec-type">
      <xs:sequence>
        <xs:element name="subtype" type="xs:string" minOccurs="0"/>
        <xs:any namespace="##other" processContents="lax"
          minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:attribute name="name"
        type="xs:string" use="required"/>
      <xs:attribute name="policy"
        type="policy-type" use="required"/>
      <xs:anyAttribute namespace="##any" processContents="lax"/>
    </xs:complexType>

    <!-- DECISION TYPE -->

    <xs:simpleType name="decision-type">
      <xs:restriction base="xs:string">
        <xs:pattern value="automatic"/>
        <xs:pattern value="moderator-controlled"/>
        <xs:pattern value=".+"/>
      </xs:restriction>
    </xs:simpleType>

    <!-- POLICY TYPE -->

     <xs:simpleType name="policy-type">
      <xs:restriction base="xs:string">
        <xs:pattern value="allowed"/>
        <xs:pattern value="disallowed"/>
        <xs:pattern value=".+"/>
      </xs:restriction>
     </xs:simpleType>

    <!-- CONTROL TYPE -->

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    <xs:complexType name="controls-type">
      <xs:sequence>
        <xs:element name="mute"
          type="xs:boolean" minOccurs="0"/>
        <xs:element name="pause-video"
          type="xs:boolean" minOccurs="0"/>
        <xs:element name="gain"
          type="gain-type" minOccurs="0"/>
        <xs:element name="video-layout"
          type="video-layout-type" default="single-view" minOccurs="0"/>


        <xs:any namespace="##other" processContents="lax"
          minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:anyAttribute namespace="##any" processContents="lax"/>
    </xs:complexType>

    <!-- GAIN TYPE -->

    <xs:simpleType name="gain-type">
      <xs:restriction base="xs:integer">
        <xs:minInclusive value="-127"/>
        <xs:maxInclusive value="127"/>
      </xs:restriction>
    </xs:simpleType>


    <!-- VIDEO LAYOUT TYPE -->

    <xs:simpleType name="video-layout-type">
      <xs:restriction base="xs:string">
        <xs:pattern value="single-view"/>
        <xs:pattern value="dual-view"/>
        <xs:pattern value="dual-view-crop"/>
        <xs:pattern value="dual-view-2x1"/>
        <xs:pattern value="dual-view-2x1-crop"/>
        <xs:pattern value="quad-view"/>
        <xs:pattern value="multiple-3x3"/>
        <xs:pattern value="multiple-4x4"/>

        <xs:pattern value="multiple-5x1"/>
        <xs:pattern value="automatic"/>
        <xs:pattern value=".+"/>
      </xs:restriction>
    </xs:simpleType>

    <!-- FLOOR INFORMATION TYPE -->

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    <xs:complexType name="floor-information-type">
      <xs:sequence>
        <xs:element name="conference-ID"
          type="xs:unsignedLong" minOccurs="0"/>
        <xs:element name="allow-floor-events"
          type="xs:boolean" default="false" minOccurs="0"/>
        <xs:element name="floor-request-handling"
          type="floor-request-handling-type" minOccurs="0"/>
        <xs:element name="conference-floor-policy"
          type="conference-floor-policy" minOccurs="0"/>
        <xs:any namespace="##other" processContents="lax"
          minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:anyAttribute namespace="##any" processContents="lax"/>
    </xs:complexType>

    <!-- FLOOR REQUEST TYPE -->

    <xs:simpleType name="floor-request-handling-type">
      <xs:restriction base="xs:string">
        <xs:pattern value="block"/>
        <xs:pattern value="confirm"/>
        <xs:pattern value=".+"/>
      </xs:restriction>
    </xs:simpleType>

    <!-- CONFERENCE FLOOR POLICY -->

    <xs:complexType name="conference-floor-policy">
      <xs:sequence>
        <xs:element name="floor" maxOccurs="unbounded">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="media-label"
                type="xs:string" minOccurs="1" maxOccurs="unbounded"/>
              <xs:element name="algorithm"
                type="algorithm-type" minOccurs="0"/>
              <xs:element name="max-floor-users"
                type="xs:nonNegativeInteger" minOccurs="0"/>
              <xs:element name="moderator-id"
                type="xs:nonNegativeInteger" minOccurs="0"/>
                <xs:any namespace="##other" processContents="lax"
                  minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
            <xs:attribute name="id" type="xs:string" use="required"/>
            <xs:anyAttribute namespace="##any" processContents="lax"/>
          </xs:complexType>
        </xs:element>

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      </xs:sequence>
      <xs:anyAttribute namespace="##any" processContents="lax"/>
    </xs:complexType>

    <!-- ALGORITHM TYPE -->

    <xs:simpleType name="algorithm-type">
      <xs:restriction base="xs:string">
        <xs:pattern value="moderator-controlled"/>
        <xs:pattern value="FCFS"/>
        <xs:pattern value="random"/>
        <xs:pattern value=".+"/>
      </xs:restriction>
    </xs:simpleType>

    <!-- USER ADMISSION POLICY TYPE -->

    <xs:simpleType name="user-admission-policy-type">
      <xs:restriction base="xs:string">
        <xs:pattern value="closedAuthenticated"/>
        <xs:pattern value="openAuthenticated"/>
        <xs:pattern value="anonymous"/>
        <xs:pattern value=".+"/>
      </xs:restriction>
    </xs:simpleType>

    <!-- JOIN HANDLING TYPE -->

    <xs:simpleType name="join-handling-type">
      <xs:restriction base="xs:string">
        <xs:pattern value="block"/>
        <xs:pattern value="confirm"/>
        <xs:pattern value="allow"/>
        <xs:pattern value="authenticate"/>
        <xs:pattern value="directed-operator"/>
        <xs:pattern value=".+"/>
       </xs:restriction>
    </xs:simpleType>

   <!-- DENY USER LIST TYPE -->

    <xs:complexType name="deny-users-list-type">
      <xs:sequence>
        <xs:element name="target" minOccurs="0" maxOccurs="unbounded">
          <xs:complexType>
            <xs:attribute name="uri" use="required" type="xs:anyURI"/>
            <xs:anyAttribute namespace="##any" processContents="lax"/>
          </xs:complexType>

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        </xs:element>
        <xs:any namespace="##other" processContents="lax"
          minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:anyAttribute namespace="##any" processContents="lax"/>
    </xs:complexType>

     <!-- ALLOWED USERS LIST TYPE -->

    <xs:complexType name="allowed-users-list-type">
      <xs:sequence>
        <xs:element name="target" type="target-type"
          minOccurs="0" maxOccurs="unbounded">
        </xs:element>
        <xs:element name="persistent-list"
          type="persistent-list-type"
          minOccurs="0"/>
        <xs:any namespace="##other" processContents="lax"
          minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:anyAttribute namespace="##any" processContents="lax"/>
    </xs:complexType>

    <!-- PERSISTENT LIST TYPE -->

    <xs:complexType name="persistent-list-type">
      <xs:sequence>
        <xs:element name="user" minOccurs="0" maxOccurs="unbounded">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="email" type="xs:string"
                minOccurs="0" maxOccurs="unbounded"/>
              <xs:any namespace="##other" processContents="lax"
                minOccurs="0" maxOccurs="unbounded"/>
            </xs:sequence>
            <xs:attribute name="name"
              use="required" type="xs:anyURI"/>
            <xs:attribute name="nickname"
              use="required" type="xs:string"/>
            <xs:attribute name="id"
              use="required" type="xs:string"/>
            <xs:anyAttribute namespace="##any" processContents="lax"/>
          </xs:complexType>
        </xs:element>
        <xs:any namespace="##other" processContents="lax"
          minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:anyAttribute namespace="##any" processContents="lax"/>

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    </xs:complexType>

    <!-- TARGET TYPE -->

    <xs:complexType name="target-type">
      <xs:attribute name="uri" use="required"
        type="xs:anyURI"/>
      <xs:attribute name="method" use="required"
        type="method-type"/>
      <xs:anyAttribute namespace="##any" processContents="lax"/>
    </xs:complexType>

    <!-- METHOD TYPE -->

    <xs:simpleType name="method-type">
      <xs:restriction base="xs:string">
        <xs:pattern value="dial-in"/>
        <xs:pattern value="dial-out"/>
        <xs:pattern value="refer"/>
        <xs:pattern value=".+"/>
      </xs:restriction>
    </xs:simpleType>

    <!-- ANONYMITY TYPE -->

    <xs:simpleType name="provide-anonymity-type">
      <xs:restriction base="xs:string">
        <xs:pattern value="private"/>
        <xs:pattern value="semi-private"/>
        <xs:pattern value="hidden"/>
        <xs:pattern value=".+"/>
      </xs:restriction>
    </xs:simpleType>

    <!-- MIXER TYPE -->

    <xs:complexType name="mixer-type">
      <xs:sequence>
        <xs:element name="floor">
          <xs:complexType>
            <xs:simpleContent>
              <xs:extension base="xs:boolean">
                <xs:attribute name="id" type="xs:string"
                  use="required"/>
                <xs:anyAttribute namespace="##any"
                  processContents="lax"/>
              </xs:extension>
            </xs:simpleContent>

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          </xs:complexType>
        </xs:element>
        <xs:element name="controls" type="controls-type"
          minOccurs="0" maxOccurs="unbounded"/>
        <xs:any namespace="##other" processContents="lax"
          minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:attribute name="name" type="mixer-name-type"
        use="required"/>
      <xs:anyAttribute namespace="##any" processContents="lax"/>
    </xs:complexType>

    <!-- MIXER NAME TYPE -->

    <xs:simpleType name="mixer-name-type">
      <xs:restriction base="xs:string">
        <xs:pattern value="VideoIn"/>
        <xs:pattern value="VideoOut"/>
        <xs:pattern value="AudioOut"/>
        <xs:pattern value="AudioIn"/>
        <xs:pattern value=".+"/>
      </xs:restriction>
    </xs:simpleType>

  </xs:schema>

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Authors' Addresses

   Oscar Novo
   Ericsson
   Hirsalantie 11
   Jorvas  02420
   Finland

   EMail: Oscar.Novo@ericsson.com


   Gonzalo Camarillo
   Ericsson
   Hirsalantie 11
   Jorvas  02420
   Finland

   EMail: Gonzalo.Camarillo@ericsson.com


   David P. Morgan
   Fidelity Investments
   82 Devonshire St, MZ V3C
   Boston, MA  02109-3614
   USA

   EMail: Dave.Morgan@fmr.com


   Jari Urpalainen
   Nokia
   Itamerenkatu 11-13
   Helsinki  00180
   Finland

   Phone: +358 7180 37686
   EMail: jari.urpalainen@nokia.com