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2	XCON                                                             O. Novo
3	Internet-Draft                                              G. Camarillo
4	Intended status: Standards Track                                Ericsson
5	Expires: October 9, 2009                                       D. Morgan
6	                                                    Fidelity Investments
7	                                                           J. Urpalainen
8	                                                                   Nokia
9	                                                           April 7, 2009

11	 Conference Information Data Model for Centralized Conferencing (XCON)
12	                draft-ietf-xcon-common-data-model-13.txt

14	Status of this Memo

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47	Copyright Notice
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49	   document authors.  All rights reserved.

51	   This document is subject to BCP 78 and the IETF Trust's Legal
52	   Provisions Relating to IETF Documents in effect on the date of
53	   publication of this document (http://trustee.ietf.org/license-info).
54	   Please review these documents carefully, as they describe your rights
55	   and restrictions with respect to this document.

57	Abstract

59	   This document defines an Extensible Markup Language (XML)-based
60	   conference information data model for centralized conferencing
61	   (XCON).  A conference information data model is designed to convey
62	   information about the conference and about participation in the
63	   conference.  The conference information data model defined in this
64	   document constitutes an extension of the data format specified in the
65	   Session Initiation Protocol (SIP) Event Package for Conference State.

67	Table of Contents

69	   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  5
70	   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  7
71	   3.  Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .  7
72	     3.1.  Data Model Format  . . . . . . . . . . . . . . . . . . . .  7
73	     3.2.  Data Model Namespace . . . . . . . . . . . . . . . . . . .  7
74	     3.3.  The Conference Object Identifier . . . . . . . . . . . . .  8
75	       3.3.1.  Conference Object URI Definition . . . . . . . . . . . 10
76	     3.4.  Data Model Structure . . . . . . . . . . . . . . . . . . . 10
77	   4.  Data Model Definition  . . . . . . . . . . . . . . . . . . . . 11
78	     4.1.  <conference-info>  . . . . . . . . . . . . . . . . . . . . 14
79	     4.2.  <conference-description> . . . . . . . . . . . . . . . . . 15
80	       4.2.1.  <language> . . . . . . . . . . . . . . . . . . . . . . 15
81	       4.2.2.  <display-text> . . . . . . . . . . . . . . . . . . . . 15
82	       4.2.3.  <subject>  . . . . . . . . . . . . . . . . . . . . . . 15
83	       4.2.4.  <free-text>  . . . . . . . . . . . . . . . . . . . . . 15
84	       4.2.5.  <keywords> . . . . . . . . . . . . . . . . . . . . . . 16
85	       4.2.6.  <allow-sidebars> . . . . . . . . . . . . . . . . . . . 16
86	       4.2.7.  <cloning-parent> . . . . . . . . . . . . . . . . . . . 16
87	       4.2.8.  <sidebar-parent> . . . . . . . . . . . . . . . . . . . 16
88	       4.2.9.  <conference-time>  . . . . . . . . . . . . . . . . . . 16
89	       4.2.10. <conf-uris>  . . . . . . . . . . . . . . . . . . . . . 17
90	       4.2.11. <service-uris> . . . . . . . . . . . . . . . . . . . . 18
91	       4.2.12. <maximum-user-count> . . . . . . . . . . . . . . . . . 18
92	       4.2.13. <available-media>  . . . . . . . . . . . . . . . . . . 18
93	     4.3.  <host-info>  . . . . . . . . . . . . . . . . . . . . . . . 20
94	     4.4.  <conference-state> . . . . . . . . . . . . . . . . . . . . 20
95	       4.4.1.  <allow-conference-event-subscription>  . . . . . . . . 20
96	       4.4.2.  <user-count> . . . . . . . . . . . . . . . . . . . . . 21
97	       4.4.3.  <active> . . . . . . . . . . . . . . . . . . . . . . . 21
98	       4.4.4.  <locked> . . . . . . . . . . . . . . . . . . . . . . . 21
99	     4.5.  <floor-information>  . . . . . . . . . . . . . . . . . . . 21
100	       4.5.1.  <conference-ID>  . . . . . . . . . . . . . . . . . . . 21
101	       4.5.2.  <allow-floor-events> . . . . . . . . . . . . . . . . . 21
102	       4.5.3.  <floor-request-handling> . . . . . . . . . . . . . . . 22
103	       4.5.4.  <conference-floor-policy>  . . . . . . . . . . . . . . 22
104	     4.6.  <users>  . . . . . . . . . . . . . . . . . . . . . . . . . 23
105	       4.6.1.  <join-handling>  . . . . . . . . . . . . . . . . . . . 23
106	       4.6.2.  <user-admission-policy>  . . . . . . . . . . . . . . . 24
107	       4.6.3.  <allowed-users-list> . . . . . . . . . . . . . . . . . 24
108	       4.6.4.  <deny-users-list>  . . . . . . . . . . . . . . . . . . 25
109	       4.6.5.  <user> and Its <user> Sub-elements . . . . . . . . . . 25
110	         4.6.5.1.  <display-text> . . . . . . . . . . . . . . . . . . 26
111	         4.6.5.2.  <associated-aors>  . . . . . . . . . . . . . . . . 27
112	         4.6.5.3.  <provide-anonymity>  . . . . . . . . . . . . . . . 27
113	         4.6.5.4.  <roles>  . . . . . . . . . . . . . . . . . . . . . 27
114	         4.6.5.5.  <languages>  . . . . . . . . . . . . . . . . . . . 27
115	         4.6.5.6.  <cascaded-focus> . . . . . . . . . . . . . . . . . 27
116	         4.6.5.7.  <allow-refer-users-dynamically>  . . . . . . . . . 27
117	         4.6.5.8.  <allow-invite-users-dynamically> . . . . . . . . . 28
118	         4.6.5.9.  <allow-remove-users-dynamically> . . . . . . . . . 28
119	         4.6.5.10. <endpoint> . . . . . . . . . . . . . . . . . . . . 28
120	     4.7.  <sidebars-by-ref>  . . . . . . . . . . . . . . . . . . . . 29
121	     4.8.  <sidebars-by-val>  . . . . . . . . . . . . . . . . . . . . 29
122	   5.  RELAX NG Schema  . . . . . . . . . . . . . . . . . . . . . . . 30
123	   6.  XML Schema Extensibility . . . . . . . . . . . . . . . . . . . 40
124	   7.  XML Example  . . . . . . . . . . . . . . . . . . . . . . . . . 41
125	   8.  Security Considerations  . . . . . . . . . . . . . . . . . . . 50
126	     8.1.  Authentication . . . . . . . . . . . . . . . . . . . . . . 50
127	     8.2.  Confidentiality  . . . . . . . . . . . . . . . . . . . . . 51
128	     8.3.  Integrity  . . . . . . . . . . . . . . . . . . . . . . . . 51
129	   9.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 51
130	     9.1.  Relax NG Schema Registration . . . . . . . . . . . . . . . 51
131	     9.2.  XML Namespace Registration . . . . . . . . . . . . . . . . 52
132	     9.3.  Conference Object Identifier Registration  . . . . . . . . 53
133	     9.4.  Conference User Identifier Registration  . . . . . . . . . 54
134	   10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 54
135	   11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 55
136	     11.1. Normative References . . . . . . . . . . . . . . . . . . . 55
137	     11.2. Informative References . . . . . . . . . . . . . . . . . . 55
138	   Appendix A.  Non-Normative RELAX NG Schema in XML Syntax . . . . . 56
139	   Appendix B.  Non-Normative W3C XML Schema  . . . . . . . . . . . . 83
140	   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 93

142	1.  Introduction

144	   There is a core data set of conference information that is utilized
145	   in any conference, independent of the specific conference media.
146	   This core data set called the 'conference information data model' is
147	   defined in this document using an Extensible Markup Language (XML)-
148	   based.  The conference information data model defined in this
149	   document is logically represented by the conference object.

151	   Conference objects are a fundamental concept in Centralized
152	   Conferencing, as described in the Centralized Conferencing Framework
153	   [RFC5239].  A conference object contains data that represents a
154	   conference during each of its various stages (e.g., created/creation,
155	   reserved/reservation, active/activation, completed/completion).  A
156	   conference object can be manipulated using a conference control
157	   protocol at a conference server.  The conference object represents a
158	   particular instantiation of a conference information data model.
159	   Consequently, conference objects follow the XML format defined in
160	   this document.

162	   A conference object contains the core information of a conference
163	   (i.e., capabilities, membership, call control signaling, media, etc.)
164	   and specifies who, and in which way that information can be
165	   manipulated.

167	   Figure 1 shows the logical functional elements of a conference server
168	   as defined by the Centralized Conferencing Framework [RFC5239].  They
169	   are a Conference Control Server, a Floor Control Server, a number of
170	   Foci, and a Notification Service.  A conference control protocol
171	   provides the interface between a conference control client and the
172	   conference control server.  A floor control protocol (e.g., BFCP
173	   [RFC4582]) provides the interface between a floor control client and
174	   the floor control server.  A call signaling protocol (e.g., SIP,
175	   H.323, Q.931, ISUP, etc.) provides the interface between a call
176	   signaling client and a Focus.  A notification protocol (e.g., SIP-
177	   based event notifications [RFC3265]) provides the interface between
178	   the conferencing client and the Notification Service.  Within a
179	   conference, the conference control server, floor control server, and
180	   focus can modify the information in the conference object.

182	      ...............................................................
183	      . Conferencing Server                                         .
184	      .       +---------------------------------------------------+ .
185	      .       |       C o n f e r e n c e   o b j e c t           | .
186	      .     +-+--------------------------------------------------+| .
187	      .     |       C o n f e r e n c e   o b j e c t            || .
188	      .   +-+---------------------------------------------------+|| .
189	      .   |       C o n f e r e n c e   o b j e c t             ||| .
190	      .   | +--------------------------------------------------+||| .
191	      .   | | Conference Information Data Model                |||| .
192	      .   | | +----------------------------------------------+ |||| .
193	      .   | | | Conference description  (times, duration)    | |||| .
194	      .   | | +----------------------------------------------+ |||| .
195	      .   | | +----------------------------------------------+ |||| .
196	      .   | | | Host information                             | |||| .
197	      .   | | +----------------------------------------------+ |||| .
198	      .   | | +----------------------------------------------+ |||| .
199	      .   | | | Conference state                             | |||| .
200	      .   | | +----------------------------------------------+ |||| .
201	      .   | | +----------------------------------------------+ |||| .
202	      .   | | | Floor information                            | |||| .
203	      .   | | +----------------------------------------------+ |||| .
204	      .   | | +----------------------------------------------+ |||| .
205	      .   | | | Membership (users, capacity)                 | |||| .
206	      .   | | +----------------------------------------------+ |||| .
207	      .   | | +----------------------------------------------+ |||| .
208	      .   | | | Sidebars, Etc.                               | |||| .
209	      .   | | +----------------------------------------------+ |||| .
210	      .   | | +----------------------------------------------+ |||| .
211	      .   | | | Etc.                                         | |||| .
212	      .   | | +----------------------------------------------+ |||+ .
213	      .   | +--------------------------------------------------+|+  .
214	      .   +----^------------------^-------------^--------|------+   .
215	      .        |                  |             |        |          .
216	      . +------v-------+ +--------v-----+ +-----v-+ +----v-------+  .
217	      . | Conference   | | Floor        | |       | |            |  .
218	      . | Control      | | Control      | |Foci   | |Notification|  .
219	      . | Server       | | Server       | |       | |Service     |  .
220	      . +-----^--------+ +---^----------+ +-^-----+ +------------+  .
221	      ........|..............|..............|..........|.............
222	              |Conference    |Floor         |Call      |Notification
223	              |Control       |Control       |Signaling |Protocol
224	              |Protocol      |Protocol      |Protocol  |
225	      ........v..............v..............v..........v.............
226	      .     C  o  n  f  e  r  e  n  c  i  n  g     C  l i  e  n  t  .
227	      ...............................................................

229	                 Figure 1: Conference Server Architecture

231	   The Session Initiation Protocol (SIP) Event Package for Conference
232	   State, specified in [RFC4575], already defines a data format for
233	   conferences.  However, that model is SIP specific and lacks elements
234	   related to some of the functionality defined by the Centralized
235	   Conferencing Framework [RFC5239] (e.g., floor control).  The data
236	   model defined in this document constitutes a superset of the data
237	   format defined in [RFC4575].  The result is a data format that
238	   supports more call signaling protocols besides SIP and that covers
239	   all the functionality defined in the Centralized Conferencing
240	   Framework [RFC5239].

242	2.  Terminology

244	   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
245	   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
246	   document are to be interpreted as described in RFC 2119 [RFC2119].

248	   This document uses the terminology defined in the Centralized
249	   Conferencing Framework [RFC5239], the SIPPING conferencing framework
250	   [RFC4353] and the BFCP (Binary Floor Control Protocol) specification
251	   [RFC4582].  Readers of this document should be familiar with the
252	   terminology used in those documents.

254	3.  Overview

256	   The data model specified in this document is the result of extending
257	   the data format defined in [RFC4575] with new elements.  Examples of
258	   such extensions include scheduling elements, media control elements,
259	   floor control elements, non-SIP URIs, and addition of localization
260	   extensions to text elements.  This data model can be used by
261	   conference servers providing different types of basic conferences.
262	   It is expected that this data model can be further extended with new
263	   elements in the future in order to implement additional advanced
264	   features.

266	3.1.  Data Model Format

268	   A conference object document is an XML [W3C.REC-xml-20001006]
269	   document that MUST be well formed and SHOULD be valid.  Conference
270	   object documents MUST be based on XML 1.0 and SHOULD be encoded using
271	   UTF-8.

273	3.2.  Data Model Namespace

275	   This specification defines a new namespace specification for
276	   identifying the elements defined in the data model.  This namespace
277	   is as follows:

279	   urn:ietf:params:xml:ns:xcon-conference-info

281	3.3.  The Conference Object Identifier

283	   The conference object identifier (XCON-URI) can be viewed as a key to
284	   accessing a specific conference object.  It can be used, for
285	   instance, by the conference control protocol to access, manipulate
286	   and delete a conference object.  A conference object identifier is
287	   provided to the conferencing client by the conference notification
288	   service or through out-of-band mechanisms (e.g.  E-Mail).

290	   A conferencing system may maintain a relationship between the
291	   conference object identifiers and the identifiers associated with
292	   each of the complementary centralized conferencing protocols (e.g.,
293	   call signaling protocols, BFCP, etc.).  To facilitate the maintenance
294	   of these relationships, the conference object identifier acts as a
295	   top level identifier within the conferencing system for the purpose
296	   of identifying the interfaces for these other protocols.  This
297	   implicit binding provides a structured mapping of the various
298	   protocols with the associated conference object Identifier.  Figure 2
299	   illustrates the relationship between the identifiers used for the
300	   protocols and the general conference object identifier (XCON-URI).

302	                            +--------------------------+
303	                            |       Conference         |
304	                            |         Object           |
305	                            |       Identifier         |
306	                            +--------------------------+
307	                            |  xcon:Ji092i@example.com |
308	                            +------+-------------------+
309	                                        |
310	                                        |
311	                                        |
312	                      +-----------------+---------------+
313	                      |                                 |
314	          +-----------+-----------+          +----------+---------+
315	          |   CSP Conference IDs  |          |BFCP 'Conference ID'|
316	          +-----------------------+          +--------------------+
317	          | h323:i092@example.com |          |        i092        |
318	          | tel:+44(0)2920930033  |          +----------+---------+
319	          | sip:i092@example.com  |                     |
320	          +-----------------------+             +-------+--------+
321	                                                | BFCP 'Floor ID'|
322	                                                +----------------+
323	                                                |      543       |
324	                                                |      236       |
325	                                                +----------------+

327	                    Figure 2: Conference Object Mapping

329	   In Figure 2, the conference object identifier acts as the top level
330	   key in the identification process.  The call signaling protocols have
331	   an associated conference user identifier, often represented in the
332	   form of URIs.  The binary floor control protocol, as defined in
333	   [RFC4582], defines the 'conference ID' identifier which represents a
334	   conference instance within floor control.  When created within the
335	   conferencing system, the 'conference ID' has a 1:1 mapping to the
336	   unique conference object Identifier(XCON-URI).  Operations associated
337	   with the conference control protocols are directly associated with
338	   the conference object, thus the primary identifier associated with
339	   these protocols is the conference object identifier(XCON-URI).  The
340	   mappings between additional protocols/interface is not strictly 1:1
341	   and does allow for multiple occurrences.  For example, multiple call
342	   signaling protocols will each have a representation that is
343	   implicitly linked to the top level conference object identifier e.g.
344	   H323 and SIP URIs that represent a conference instance.  It should be
345	   noted that a conferencing system is free to structure such
346	   relationships as required and this information is just included as a
347	   guideline that can be used.

349	   Further elements can be added to the tree representation in Figure 2
350	   to enable a complete representation of a conference instance within a
351	   conferencing system.

353	3.3.1.  Conference Object URI Definition

355	   XCON-URI = "xcon" ":" [conf-object-id "@"] host [ ":" port ]

357	    conf-object-id = 1*( unreserved / "+" / "=" / "/" )

359	   host, port, and unreserved are defined in RFC3986[RFC3986]

361	3.4.  Data Model Structure

363	   The information in this data model is structured in the following
364	   manner.  All the information related to a conference is contained in
365	   a <conference-info> element.  The <conference-info> element contains
366	   the following child elements:

368	   o  The <conference-description> element describes the conference as a
369	      whole.  It has, for instance, information about the URI of the
370	      conference, maximum users allowed in the conference, media
371	      available in the conference, or the time the conference will
372	      start.
373	   o  The <host-info> element contains information about the entity
374	      hosting the conference (e.g., its URI).
375	   o  The <conference-state> element informs the subscribers about the
376	      changes in the overall conference information.
377	   o  The <floor-information> element contains information about the
378	      status of the different floors in the conference.
379	   o  The <users> element describes the membership information as a
380	      whole.  The <users> element contains a set of <user> child
381	      elements, each describing a single participant in the conference.
382	   o  If a participant in the main conference joins a sidebar, a new
383	      element is created in the conference referenced from the
384	      <sidebars-by-ref> element or under one of the <sidebars-by-val>
385	      elements.

387	   Note that some of the elements described above such <conference-
388	   info>, <conference-description>, <sidebars-by-ref>, or <sidebars-by-
389	   val> are not defined in the data model but are defined in the data
390	   format of [RFC4575].  We describe them here because they are part of
391	   the basic structure of the data model.

393	4.  Data Model Definition

395	   The following non-normative diagram shows the structure of conference
396	   object documents.  The operator "!" preceding an element indicates
397	   that the element is mandatory in the data model.  The operator "*"
398	   following an element indicates that the element is introduced and
399	   defined in this document.  That is, elements without a "*" have
400	   already been defined in [RFC4575].

402	   !<conference-info>
403	        |
404	        |--!<conference-description>
405	        |     |--<language>*
406	        |     |--<display-text>
407	        |     |--<subject>
408	        |     |--<free-text>
409	        |     |--<keywords>
410	        |     |--<allow-sidebars>*
411	        |     |--<cloning-parent>*
412	        |     |--<sidebar-parent>*
413	        |     |--<conference-time>*
414	        |     |      |--<entry>*
415	        |     |      |    |--<base>*
416	        |     |      |    |--<mixing-start-offset>*
417	        |     |      |    |--<mixing-end-offset>*
418	        |     |      |    |--<can-join-after-offset>*
419	        |     |      |    |--<must-join-before-offset>*
420	        |     |      |    |--<request-user>*
421	        |     |      |    |--<notify-end-of-conference>*
422	        |     |      |    |--<allowed-extend-mixing-end-offset>*
423	        |     |           ...
424	        |     |--<conf-uris>
425	        |     |      |--<entry>
426	        |     |      |    |--<uri>
427	        |     |      |    |--<display-text>
428	        |     |      |    |--<purpose>
429	        |     |      |    |--<conference-password>*
430	        |     |      ...
431	        |     |--<service-uris>
432	        |     |      |--<entry>
433	        |     |      |    |--<uri>
434	        |     |      |    |--<display-text>
435	        |     |      |    |--<purpose>
436	        |     |      ...
437	        |     |--<maximum-user-count>
438	        |     |      ...
439	        |     |--<available-media>
440	        |     |      |--!<entry>
441	        |     |      |     |--<display-text>
442	        |     |      |     |--<type>
443	        |     |      |     |--<status>
444	        |     |      |     |--<mixing-mode>*
445	        |     |      |     |--<codecs>*
446	        |     |      |     |    |--<codec>*
447	        |     |      |     |    |    |--<subtype>*
448	        |     |      |     |    |--<codec>*
449	        |     |      |     |    |    |--<subtype>*
450	        |     |      |     |    ...
451	        |     |      |     |--<controls>*
452	        |     |      |     |    |--<mute>*
453	        |     |      |     |    |--<gain>*
454	        |     |      |     |   ...
455	        |     |      |--<entry>
456	        |     |      |     |--<display-text>
457	        |     |      |     |--<type>
458	        |     |      |     |--<status>
459	        |     |      |     |--<mixing-mode>*
460	        |     |      |     |--<codecs>*
461	        |     |      |     |    |--<codec>*
462	        |     |      |     |    |    |--<subtype>*
463	        |     |      |     |    |--<codec>*
464	        |     |      |     |    |    |--<subtype>*
465	        |     |      |     |    ...
466	        |     |      |     |--<controls>*
467	        |     |      |     |    |--<pause-video>*
468	        |     |      |     |    |--<video-layout>*
469	        |     |      |     |   ...
470	        |     |      ...
471	        |
472	        |--<host-info>
473	        |     |--<display-text>
474	        |     |--<web-page>
475	        |     |--<uris>
476	        |     |     |--<entry>
477	        |     |     |    |--<uri>
478	        |     |     |    |--<display-text>
479	        |           ...
480	        |--<conference-state>
481	        |     |--<allow-conference-event-subscription>*
482	        |     |--<user-count>
483	        |     |--<active>
484	        |     |--<locked>
485	        |
486	        |--<floor-information>*
487	        |     |--<conference-ID>*
488	        |     |--<allow-floor-events>*
489	        |     |--<floor-request-handling>*
490	        |     |--<conference-floor-policy>*
491	        |     |     |--<floor>*
492	        |     |     |    |--!<media-label>*
493	        |     |     |    |--!<algorithm>*
494	        |     |     |    |--<max-floor-users>*
495	        |     |     |    |--<moderator-id>*
496	        |     |     |   ...
497	        |     |     ...
498	        |
499	        |--!<users>
500	        |     |--<join-handling>*
501	        |     |--<user-admission-policy>*
502	        |     |--<allowed-users-list>*
503	        |     |     |--<target>*
504	        |     |     |
505	        |     |     |--<persistent-list>*
506	        |     |     |     |--<user>*
507	        |     |     |     |     |-- <email>*
508	        |     |
509	        |     |--<deny-users-list>*
510	        |     |
511	        |     |--<user>
512	        |     |    |--<display-text>
513	        |     |    |--<associated-aors>
514	        |     |    |--<provide-anonymity>*
515	        |     |    |--<roles>
516	        |     |    |    |
517	        |     |    |   ...
518	        |     |    |--<languages>
519	        |     |    |--<cascaded-focus>
520	        |     |    |--<allow-refer-users-dynamically>*
521	        |     |    |--<allow-invite-users-dynamically>*
522	        |     |    |--<allow-remove-users-dynamically>*
523	        |     |    |--!<endpoint>
524	        |     |    |      |--<display-text>
525	        |     |    |      |--<referred>
526	        |     |    |      |--<status>
527	        |     |    |      |--<joining-method>
528	        |     |    |      |--<joining-info>
529	        |     |    |      |--<disconnection-method>
530	        |     |    |      |--<disconnection-info>
531	        |     |    |      |--<media>
532	        |     |    |      |    |--<type>
533	        |     |    |      |    |--<display-text>
534	        |     |    |      |    |--<label>
535	        |     |    |      |    |--<src-id>
536	        |     |    |      |    |--<status>
537	        |     |    |      |    |--<to-mixer>*
538	        |     |    |      |    |      |--<floor>*
539	        |     |    |      |    |      |--<controls>*
540	        |     |    |      |    |      |      |--<mute>*
541	        |     |    |      |    |      |      |--<gain>*
542	        |     |    |      |    |      |     ...
543	        |     |    |      |    |--<from-mixer>*
544	        |     |    |      |    |      |--<floor>*
545	        |     |    |      |    |      |--<controls>*
546	        |     |    |      |    |      |      |--<pause-video>*
547	        |     |    |      |    |      |     ...
548	        |     |    |      |   ...
549	        |     |    |      |--<call-info>
550	        |     |    |      |    |--<sip>
551	        |     |    |      |    |   |--<display-text>
552	        |     |    |      |    |   |--<call-id>
553	        |     |    |      |    |   |--<from-tag>
554	        |     |    |      |    |   |--<to-tag>
555	        |          ...    ...
556	        |--<sidebars-by-ref>
557	        |     |--<entry>
558	        |     |     |-- <user>
559	        |     |     |-- <display-text>
560	        |     |--<entry>
561	        |     |     |-- <user>
562	        |     |     |-- <display-text>
563	        |     ...
564	        |--<sidebars-by-val>
565	        |     |--<entry>
566	        |     |     |
567	        |     |    ...
568	        |     |--<entry>
569	        |     |     |
570	        |     ...   ...

572	                      Figure 3: Non-normative diagram

574	   The following sections describe these elements in detail.  The full
575	   Relax NG schema is provided Section 5.

577	4.1.  <conference-info>

579	   A conference object document begins with the root element tag
580	   <conference-info>, which is defined in [RFC4575].  The <conference-
581	   info> attributes are described in [RFC4575].  Note that the
582	   <conference-info> element does not have the attributes 'state' and
583	   'version' defined in [RFC4575] for this element because these
584	   attributes only apply to notification mechanisms.

586	   In addition, [RFC4575] defines an 'entity' attribute that contains
587	   the conference object identifier (XCON-URI) that identifies the
588	   conference being described in the document.

590	   The <conference-info> element contains the <conference-description>,
591	   <host-info>, <conference-state>, <floor-information>, <users>,
592	   <sidebars-by-ref>, and <sidebars-by-val> child elements.  All these
593	   elements, except <floor-information>, are defined in [RFC4575].  A
594	   conference document MUST at least include the <conference-
595	   description> and <users> child elements.

597	4.2.  <conference-description>

599	   The <conference-description> element, which is defined in [RFC4575],
600	   describes the conference as a whole.  It should have an extra
601	   attribute 'lang' to specify the language used in the contents of this
602	   element.  It is comprised of <language>, <display-text>, <subject>,
603	   <free-text>, <keywords>, <allow-sidebars>, <cloning-parent>,
604	   <sidebar-parent>, <conference-time>, <conf-uris>, <service-uris>,
605	   <maximum-user-count>, and <available-media>.

607	   The following sections describe these elements in more detail.  Other
608	   child elements MAY be defined in the future to extend the
609	   <conference-description> element.

611	4.2.1.  <language>

613	   The <language> element indicates the predominant language that is
614	   expected to be employed within a conference.  This element is not
615	   enforcing the language of the conference, but only informs the
616	   participants about the desirable language that they should use in the
617	   conference.  Participants are free to switch to other languages if
618	   they like.

620	4.2.2.  <display-text>

622	   The <display-text> element is described in section 5.3 of [RFC4575].

624	4.2.3.  <subject>

626	   The <subject> element is described in section 5.3 of [RFC4575].

628	4.2.4.  <free-text>

630	   The <free-text> element is described in section 5.3 of [RFC4575].

632	4.2.5.  <keywords>

634	   The <keywords> element is described in section 5.3 of [RFC4575].

636	4.2.6.  <allow-sidebars>

638	   The <allow-sidebars> element represents a boolean action.  If set to
639	   TRUE, the conference is allowed to create sidebar conferences.

641	4.2.7.  <cloning-parent>

643	   When the <cloning-parent> is present, it indicates that the
644	   conference object is a child of a parent conference.  The <cloning-
645	   parent> element contains the conference object Identifier (XCON-URI)
646	   (different from the main XCON-URI) of the parent.

648	4.2.8.  <sidebar-parent>

650	   When the <sidebar-parent> is present, it indicates that the
651	   conference object represents a sidebar of another conference.  The
652	   <sidebar-parent> element contains the conference object Identifier
653	   (XCON-URI) (different from the main XCON-URI) of the parent.

655	4.2.9.  <conference-time>

657	   The <conference-time> element contains the information related to
658	   conference time and duration of a conference.  The <conference-time>
659	   element contains one or more <entry> elements each defining the time
660	   information specifying a single conference occurrence.

662	   Every <entry> element contains the following child elements:

664	   o  <base>: The <base> child element specifies the iCalendar object of
665	      the conference.  The iCalendar object components are defined in
666	      [RFC2445].
667	   o  <mixing-start-offset>: The <mixing-start-offset> child element
668	      specifies when the conference media mixing starts before the
669	      conference starts.  If the <mixing-start-offset> element is not
670	      present, it indicates that the conference media mixing starts
671	      immediately.  The <mixing-start-offset> has the mandatory
672	      'required-participant' attribute.  This attribute contains one of
673	      the following values: "none", "administrator", "moderator",
674	      "user", "observer", and "participant".  The roles semantic
675	      definition is out of the scope of this document and is subject to
676	      future policy documents.  More values can be specified in the
677	      future.  The 'required-participant' attribute allows a privileged
678	      user to define when media mixing starts based on the latter of the
679	      mixing start time, and the time the first participant arrives.  If
680	      the value is set to "none'", mixing starts according to the mixing
681	      start time.
682	   o  <mixing-end-offset>: The <mixing-end-offset> child element that
683	      specifies the time a conference media mixing stops after the
684	      conference stops.  If the <mixing-end-offset> element is not
685	      present, it indicates that the conference occurrence is not
686	      bounded.  The <mixing-end-offset> element has the mandatory
687	      'required-participant' attribute.  This attribute contains one of
688	      the following values: "none", "administrator", "moderator",
689	      "observer", "user", and "participant".  More values can be
690	      specified in the future.  The 'required-participant' attribute
691	      allows a privileged user to define when media mixing ends based on
692	      the earlier of the <mixing-end-offset>, and the time the last
693	      participant leaves.  If the value is set to "none", mixing stops
694	      according to the <mixing-end-offset>.  If the conference policy
695	      was modified so that last privileged user is now a normal
696	      conference participant, and the conference requires a privileged
697	      user to continue; that conference MUST terminate.
698	   o  <can-join-after-offset>: An administrator can indicate the time
699	      when users can join a conference by populating the <can-join-
700	      after-offset> element.
701	   o  <must-join-before-offset>: An administrator can define the time
702	      after which new users are not allowed to join the conference
703	      anymore.
704	   o  <request-user>: It is possible to define the time when users or
705	      resources on the <allowed-users-list> are requested to join the
706	      conference by using the <request-users> element.
707	   o  <notify-end-of-conference>: The <notify-end-of-conference> element
708	      defines in seconds when the system has to send a notification when
709	      the end of the conference is approaching.  If the <notify-end-of-
710	      conference> element is not present, it indicates that the system
711	      does not notify the users when the end of the conference is
712	      approaching.
713	   o  <allowed-extend-mixing-end-offset>: The <allowed-extend-mixing-
714	      end-offset> refers to the possibility to extend the conference.
715	      It has a boolean value.

717	4.2.10.  <conf-uris>

719	   The <conf-uris> contains the identifiers to be used in order to
720	   access the conference by different signaling means.  This document
721	   describes a new element, <conference-password>.  This element
722	   contains the password(s) of the conference, for instance, PSTN
723	   conference will store the 'PIN code' in this element.  All the other
724	   <conf-uris> child element are described in section 5.3.1 of
725	   [RFC4575].  Future extensions to this schema may define new values
726	   and register them with IANA.

728	4.2.11.  <service-uris>

730	   The <service-uris> describes auxiliary services available for the
731	   conference.  The <service-uris> element is described in section 5.3.2
732	   of [RFC4575].  Future extensions to this schema may define new values
733	   and register them with IANA.

735	4.2.12.  <maximum-user-count>

737	   The <maximum-user-count> contains the overall number of users allowed
738	   to join the conference.  Note that this value is set by an
739	   administrator and can reflect any local policies such as network
740	   consumption, CPU processing power, and licensing rules.

742	4.2.13.  <available-media>

744	   The <available-media> element consists of a sequence of <entry> child
745	   elements.  Each <entry> element contain the 'label' attribute that is
746	   the media stream identifier assigned by the conferencing server.  The
747	   attribute 'label' is described in [RFC4575], section 5.3.4.  Each
748	   <entry> element contains the following child elements:

750	   o  The <type> element is described in section 5.3.4 of [RFC4575].
751	   o  The <display-text> element is described in section 5.3.4 of
752	      [RFC4575].
753	   o  The <status> element is described in section 5.3.4 of [RFC4575].
754	   o  The child element <mixing-mode> describes a default policy by
755	      which the mixer will build the outgoing stream from the incoming
756	      streams.  Note that this policy is different than the policy
757	      describing the floors for each media.  The <mixing-mode> child
758	      element MUST contain one and only one of the "Moderator-
759	      controlled", "FCFS", and "Automatic" values indicating the default
760	      algorithm to use with every media stream.  The "Moderator-
761	      controlled" value indicates that the moderator of the conference,
762	      controls the media stream policy.  The "FCFS" value indicates a
763	      'first-come-first-served' policy.
764	   o  The <codecs> element specifies the allowed codecs in the
765	      conference.  It has an attribute 'decision' that specifies if the
766	      focus decides the common codec automatically or needs the approval
767	      of the moderator of the conference ("automatic", "moderator-
768	      controlled").  The <codecs> element contains <codec> elements.  A
769	      <codec> element can have the attribute 'name' and 'policy'.  The
770	      'name' attribute is a codec identifier assigned by the
771	      conferencing server.  The 'policy' attribute contains the policy
772	      for that codec (allowed, or disallowed).  The <codec> element has
773	      the child element <subtype> which stores the codec's name.  The
774	      possible values of this element are the values of the 'subtype'
775	      column of the RTP Payload Format media types per [RFC4855] defined
776	      in IANA [IANA].  It is expected that future conferencing
777	      specifications will define corresponding schema extensions, as
778	      appropriate.
779	   o  The <controls> element contains the basic audio and video global
780	      control elements for a conference.  It is expected that for the
781	      majority of the basic conferences, these controls are sufficient.
782	      If the conference server wants to support more advanced controls,
783	      then it is recommended that an extension to the data model be
784	      used.  In the <controls> element the schema is extensible, hence
785	      new control types can be added in the future.  So moderator
786	      controls that affect all media output would go under the
787	      <available-media> element.  The following controls elements are
788	      defined for <controls>:
789	      *  The <mute> element is used in conjunction with an audio stream
790	         to cease transmission of associated media.  That means that for
791	         the entire duration where mute is applicable, all current and
792	         future participants of the conference are muted and will not
793	         receive any audio.  It has a "boolean" value.  If this control
794	         is not specified, access to the control is not available to the
795	         client.
796	      *  The <pause-video> element is used in conjunction with a video
797	         stream to cease transmission of associated media.  It has a
798	         "boolean" value.  If this control is not specified, the access
799	         to the control is not available to the client.
800	      *  The <gain> element is used in conjunction with a media output
801	         stream to indicate the amount of amplification of an audio
802	         stream.  The value is an integer number that ranges from -127
803	         to 127.  If this control is not specified, access to the
804	         control is not available to the client.
805	      *  The <video-layout> element is used in conjunction with a video
806	         stream to specify how the video streams (of participants) are
807	         viewed by each participant.  Only one layout type can be
808	         specified for each output stream.  If there are fewer
809	         participants than panels in the specified layout, then blanking
810	         (black screen) MAY be mixed into the stream on the behalf of
811	         the missing input streams.  If unspecified, the <video-layout>
812	         default type SHOULD be "single-view".  The <video-layout> types
813	         are as follows, although any number of custom layouts may be
814	         specified in future extensions:
815	         +  single-view: Only one stream is presented by the focus to
816	            all participants in one panel.
817	         +  dual-view: This dual view option will present the video
818	            side-by-side in 2 panels and not alter the aspect ratio of
819	            the streams.  This will require the focus to introduce
820	            blanking on parts of the overall image as viewed by the
821	            participants.

823	         +  dual-view-crop: This side-by-side layout option instructs
824	            the focus to alter the aspect ratio of the streams (alter-
825	            aspect-ratio=TRUE) so that blanking is not necessary.  The
826	            focus handles the cropping of the streams.
827	         +  dual-view-2x1: This layout option instructs the focus to
828	            place one stream above the other, in essence with two rows
829	            and one column.  In this option the aspect ratio is not
830	            altered and blanking is introduced.
831	         +  dual-view-2x1-crop: This layout option also instructs the
832	            focus to place one stream above the other, in essence with
833	            two rows and one column.  In this option the aspect ratio is
834	            altered and the video streams are cropped.
835	         +  quad-view: Four equal-sized panels in a 2x2 layout is
836	            presented by the focus to all participants.  Typically the
837	            aspect ratio of the streams are maintained (alter-aspect-
838	            ratio= FALSE).
839	         +  multiple-3x3: Nine equal-sized panels in a 3x3 layout is
840	            presented by the focus to all participants.  Typically the
841	            aspect ratio of the streams are preserved.
842	         +  multiple-4x4: Sixteen equal-sized panels in a 4x4 layout is
843	            presented by the focus to all participants.  Typically the
844	            aspect ratio of the streams are preserved.
845	         +  multiple-5x1: This option refers to a 5x1 layout where one
846	            panel will occupy 4/9 of the mixed video stream while the
847	            others will each occupy 1/9 of the stream.  Typically the
848	            aspect ratio of the streams is preserved.
849	         +  automatic: This option allows the focus to add panels as
850	            streams are added.

852	4.3.  <host-info>

854	   The <host-info> element contains information about the entity hosting
855	   the conference.  This information is set before conference
856	   activation, and is rarely changed during the conference lifetime.
857	   The <host-info> element and its child elements are described in
858	   [RFC4575], section 5.4.  Future extensions to the <host-info> element
859	   may define new values.

861	4.4.  <conference-state>

863	   The <conference-state> is introduced in RFC4575 [RFC4575].  The
864	   <conference-state> element contains the <allow-conference-event-
865	   subscription>, <user-count>, <active>, and <locked> child elements.

867	4.4.1.  <allow-conference-event-subscription>

869	   The <allow-conference-event-subscription> element represents a
870	   boolean action.  If set to TRUE, the focus is instructed to allow the
871	   subscription to conference state events, such as RFC4575 'SIP Event
872	   Package for Conference State' [RFC4575].  If set to FALSE, the
873	   subscription to conference state events would be rejected.  If this
874	   element is undefined it has a default value of TRUE, causing the
875	   subscription to conference state events to be accepted.

877	4.4.2.  <user-count>

879	   The <user-count> child element is explained in [RFC4575], section
880	   5.5.1.

882	4.4.3.  <active>

884	   The <active> child element is explained in [RFC4575], section 5.5.2.

886	4.4.4.  <locked>

888	   The <locked> child element is explained in [RFC4575], section 5.5.3.

890	4.5.  <floor-information>

892	   The <floor-information> element contains the <conference-ID>, <allow-
893	   floor-events>, <floor-request-handling>, and <conference-floor-
894	   policy> child elements.  Other elements from different namespaces MAY
895	   be present for the purposes of extensibility.  The absence of this
896	   element from an XML document indicates that the conference does not
897	   have a floor.

899	4.5.1.  <conference-ID>

901	   The <conference-ID> represents a conference instance within floor
902	   control.  When created within the conferencing system, the
903	   'conference-ID' can be represented by the unique conference object
904	   Identifier (XCON-URI).  When BFCP serves as the floor control
905	   protocol, the <conference-ID> is a 32-bit BFCP conference identifier
906	   defined in [RFC4582] section 5.1 and there is a 1:1 mapping to the
907	   XCON-URI.

909	4.5.2.  <allow-floor-events>

911	   The <allow-floor-events> element represents a boolean action.  If set
912	   to TRUE, the focus is instructed to accept the subscription to floor
913	   control events.  If set to FALSE, the focus is instructed to reject
914	   the subscription.  If this element is undefined, it has a default
915	   value of FALSE, causing the subscription to floor control events to
916	   be rejected.

918	   There are two methods which a conference participant subscribes
919	   himself to a floor control event.  One method is using an offer/
920	   answer exchange mechanism ([RFC3264]) using SIP INVITE and BFCP
921	   parameters in the SDP ([RFC4583]).  The other method is a general
922	   authorization mechanism described in section 9 of [RFC4582] and in
923	   [RFC5018].  Future documentation may define additional connection
924	   mechanisms.

926	4.5.3.  <floor-request-handling>

928	   The <floor-request-handling> element defines the actions used by the
929	   conference focus to control floor requests.  This element defines the
930	   action that the focus is to take when processing a particular request
931	   to a floor within a conference.  This element defines values of:

933	   o  "block": This action instructs the focus to deny the floor
934	      request.  This action is the default action taken in the absence
935	      of any other actions.
936	   o  "confirm": This action instructs the focus to allow the request.
937	      The focus then uses the defined floor algorithm to further allow
938	      or deny the floor.  The algorithms used are outside the scope of
939	      this document.

941	   Note that this section discusses floor control information,
942	   therefore, the value "block" in a <floor-request-handling> element is
943	   not related with the "block" value in the <join-handling> element
944	   (see Section 4.6).

946	4.5.4.  <conference-floor-policy>

948	   The <conference-floor-policy> element has one or more <floor> child
949	   elements.  Every <floor> child elements has an attribute 'id' which
950	   uniquely identifies a floor or floors within a conference.  In the
951	   case of BFCP [RFC4582], the 'id' attribute corresponds to the
952	   floor-id identifier defined in [RFC4582] section 5.2.2.

954	   o  <media-label>: Every floor is identified for one or more mandatory
955	      <media-label> element.  If the <available-media> information is
956	      included in the conference document, the value of this element
957	      MUST be equal to the 'label' value of the corresponding media
958	      stream <entry> in the <available-media> container.  The number of
959	      those elements indicates how many floors the conference can have.
960	      A floor can be used for one or more media types;
961	   o  <algorithm>: A floor can be controlled using many algorithms; the
962	      mandatory <algorithm> element MUST be set to any of the
963	      "moderator-controlled", "FCFS" or "random" values indicating the
964	      algorithm.  The "Moderator-controlled" value indicates that the
965	      moderator of the conference controls the floor.  The "FCFS" value
966	      states for 'first-come-first-served' floor control.

968	   o  <max-floor-users>: The <max-floor-users> child element in the
969	      <floor> element is optional and, if present, dictates the maximum
970	      number of users who can have the floor at one time.
971	   o  <moderator-id>: The optional <moderator-id> indicates the 'User
972	      ID' of the moderator(s).  It MUST be set if the element
973	      <algorithm> is set to "Moderator-controlled" value.  When the
974	      floor is created within the conferencing system, the XCON-User
975	      identifier MAY be used as the moderator-id.  In the case of BFCP
976	      as the floor control protocol, the <moderator-id> is defined in
977	      [RFC4582] section 3.  Note that [RFC4582] refers to the moderator
978	      role as a 'floor chair'.

980	4.6.  <users>

982	   The <users> element is described in [RFC4575] and contains the <join-
983	   handling>, <user-admission-policy>, <allowed-users-list> and <deny-
984	   users-list> defined in this document and <user> child elements
985	   defined in [RFC4575].  Note that the <users> element does not have
986	   the attribute 'state' defined in [RFC4575] for this element because
987	   this attribute only applies to notifications mechanism.  The
988	   following sections describe these elements in more detail.  Other
989	   child elements and attributes can be used to extend <users> in the
990	   future.

992	4.6.1.  <join-handling>

994	   The <join-handling> element defines the actions used by the
995	   conference focus to control conference participation.  This element
996	   defines the action that the focus is to take when processing a
997	   particular request to join a conference.  This element defines values
998	   of:
999	   o  "block": This action instructs the focus to deny access to the
1000	      conference.  This action is the default action taken in the
1001	      absence of any other actions.
1002	   o  "confirm": This action instructs the focus to place the
1003	      participant on a pending list (e.g., by parking the call on a
1004	      music-on-hold server), awaiting moderator input for further
1005	      actions.
1006	   o  "allow": This action instructs the focus to accept the conference
1007	      join request and grant access to the conference within the
1008	      instructions specified in the transformations of this rule.
1009	   o  "authenticate": This action instructs the focus that the user has
1010	      to provide a combination of username/password.
1011	   o  "directed-operator": This action instructs the focus to direct the
1012	      user to an operator.

1014	4.6.2.  <user-admission-policy>

1016	   The <user-admission-policy> is an element that lets an organizer (or
1017	   a participant with appropriate rights) choose a policy for the
1018	   conference that controls how users are allowed into the conference.
1019	   The list of possible values are:

1021	   o  "closedAuthenticated": A 'closedAuthenticated' policy requires
1022	      each conference participant to be in the allowed users list
1023	      (listed under the <allowed-users-list> XML element) with each
1024	      participant being sufficiently (up to local policy) authenticated.
1025	      Conference join requests for users not in the allowed users list
1026	      or participants not authenticated should be rejected unless a
1027	      <join-handling> action of 'confirm' is selected in which case the
1028	      user is placed on a pending list as indicated earlier.
1029	   o  "openAuthenticated": An 'openAuthenticated' policy requires each
1030	      conferencing participant to be sufficiently authenticated (as
1031	      before) but does not restrict which participants can join the
1032	      conference.  Typically this implies that anyone capable of
1033	      authenticating with the conferencing system may join the
1034	      conference.
1035	   o  "anonymous": An 'anonymous' policy allows any join requests in and
1036	      is the least restrictive policy.

1038	4.6.3.  <allowed-users-list>

1040	   The <allowed-users-list> child element contains a list of user URIs
1041	   (e.g.  SIP URI, xcon-userid defined in Section 4.6.5), roles (defined
1042	   in Section 4.6.5.4), or domains (e.g.: *@example.com) that the focus
1043	   uses to determine who can join the conference, who can be invited to
1044	   join a conference, or who the focus needs to "refer to" the
1045	   conference.  The <allowed-users-list> element includes zero or more
1046	   <target> child elements.  This child element includes the mandatory
1047	   'uri' attribute and the mandatory 'method' attribute.  The same 'uri'
1048	   attribute with different method values can appear in the list more
1049	   than once.

1051	   The 'method' attribute is a list with the following values:

1053	   o  "dial-in": The value "dial-in" is used by the focus to determine
1054	      who can join the conference.
1055	   o  "dial-out": The value "dial-out" contains a list of resources that
1056	      the focus will initiate a session with.
1057	   o  "refer": The value "refer" is used by the focus to determine the
1058	      resources that the focus needs to "refer to" the conference.  In
1059	      SIP, this is achieved by the focus sending a REFER request to
1060	      those potential participants.  In a different paradigm, this could
1061	      also mean that the focus sends an SMS or an email to the referred
1062	      user.  This list can be updated during the conference lifetime so
1063	      it can be used for mid-conference refers as well.

1065	   The "refer" value differs from the "dial-out" in that the resources
1066	   on the "refer" value are expected to initiate the session
1067	   establishment toward the focus themselves.  It is also envisioned
1068	   that different users will have different access rights to those lists
1069	   and therefore a separation between the two is needed.

1071	   The <allowed-users-list> element has a <persistent-list> child
1072	   element as well.  Some chatroom systems allow -- and some require --
1073	   registration of detailed information about a user before they are
1074	   allowed to join a chatroom.  The <persistent-list> child element
1075	   stores persistent information about users who are not actively part
1076	   of an ongoing chatroom session.  The <persistent-list> element stores
1077	   the following information:

1079	   o  user: The <user> element stores the name, nickname, the conference
1080	      user identifier (XCON-USERID) and email address of a user.  It has
1081	      three attributes: 'name', 'nickname' and 'id' and an <email>
1082	      element.  Future extensions to this schema may define new elements
1083	      for the <user> element.

1085	   Future extensions to this schema may define new elements for the
1086	   <target> element.

1088	4.6.4.  <deny-users-list>

1090	   The <deny-users-list> child element contains a list of user URIs
1091	   (e.g.  SIP URI, xcon-userid defined in Section 4.6.5), roles (defined
1092	   in Section 4.6.5.4), or domains (e.g.: *@example.com) that the focus
1093	   uses to determine who has been 'banned' from the conference.  Such
1094	   banned users are prevented from re-joining the chatroom until they
1095	   have been un-banned.

1097	4.6.5.  <user> and Its <user> Sub-elements

1099	   The element <user> is described in [RFC4575] and describes a single
1100	   participant in the conference.  The <user> element has an attribute
1101	   'entity'.  Note that the <user> element does not have the attribute
1102	   'state' defined in [RFC4575] for this element because this attribute
1103	   only applies to notifications mechanism.

1105	   The attribute 'entity' contains a unique conference user identifier
1106	   (XCON-USERID) within the scope of a conferencing system.  The URI
1107	   format of this identifier is as follow:

1109	    XCON-USERID = "xcon-userid" ":" conf-user-id

1111	    conf-user-id = 1*(unreserved)

1113	   [unreserved is defined in RFC3986]

1115	   Other user identifiers can be associated with this conference user
1116	   identifier and enable the conferencing system to correlate and map
1117	   these multiple authenticated user identities to a single global user
1118	   identifier.  Figure 4 illustrates an example using the conference
1119	   user identifier in association with the user identity defined for
1120	   BFCP, SIP, and H323 user identity.  It should be noted that a
1121	   conferencing system is free to structure such relationships as
1122	   required and this information is just included as a guideline that
1123	   can be used.

1125	                         +----------------+
1126	                         |   Conference   |
1127	                         |      User      |
1128	                         |   Identifier   |
1129	                         +----------------+
1130	                         |xcon-userid:John|
1131	                         +-------+--------+
1132	                                 |
1133	                                 |
1134	                                 |
1135	          +----------------------+-------------------------+
1136	          |                      |                         |
1137	  +-------+--------+ +-----------+-----------+ +-----------+-----------+
1138	  |  BFCP User ID  | |      SIP User URI     | |     H323 User URI     |
1139	  +----------------+ +-----------------------+ +-----------------------+
1140	  |      543       | |sip:851221@example.com | |h323:taeduk@example.com|
1141	  +----------------+ +-----------------------+ +-----------------------+

1143	                     Figure 4: Conference User Mapping

1145	   The element <user> element contains the <display-text>, <associated-
1146	   aors>, <provide-anonymity>, <roles>, <languages>, <cascaded-focus>,
1147	   <allow-refer-users-dynamically>, <allow-invite-users-dynamically>,
1148	   <allow-remove-users-dynamically>, and <endpoint>.  The following
1149	   sections describe these elements in more detail.

1151	4.6.5.1.  <display-text>

1153	   The <display-text> child element is explained in [RFC4575], section
1154	   5.6.1.

1156	4.6.5.2.  <associated-aors>

1158	   The <associated-aors> child element is explained in [RFC4575],
1159	   section 5.6.2.

1161	4.6.5.3.  <provide-anonymity>

1163	   The <provide-anonymity> element provides anonymity to the user.  In
1164	   this case, the focus provides to the rest of the participants an
1165	   anonymous identity for that user, for example anonymousX, or it does
1166	   not provide any information for that user such that other users can
1167	   not see he is a participant in the conference.  This element only
1168	   affects the way the user information is provided to the other
1169	   participants.  The real information about the user is still stored in
1170	   the data model.  This can be achieved by using the <provide-
1171	   anonymity> element.  This element has three values: 'private', 'semi-
1172	   private' and 'hidden'.  The 'private' value specifies that this user
1173	   is completely anonymous in the conference. 'semi-private' value
1174	   specifies that this user is anonymous to all users with equal or
1175	   lesser permissions in the conference. 'hidden' value specifies that
1176	   other users can not see this participant in the conference.

1178	4.6.5.4.  <roles>

1180	   A role provides the context for the set of conference operations that
1181	   a participant can perform.  This element can contain one of the
1182	   following values: "administrator", "moderator", "user",
1183	   "participant", "observer", and "none".  The roles semantic definition
1184	   is out of the scope of this document and is subject to future policy
1185	   documents.  This element can be extended with new roles in future
1186	   documents.

1188	4.6.5.5.  <languages>

1190	   The <languages> child element is explained in [RFC4575], section
1191	   5.6.4.

1193	4.6.5.6.  <cascaded-focus>

1195	   The <cascaded-focus> child element is explained in [RFC4575], section
1196	   5.6.5.

1198	4.6.5.7.  <allow-refer-users-dynamically>

1200	   The <allow-refer-users-dynamically> element represents a boolean
1201	   action.  If set to TRUE, a participant is allowed to instruct the
1202	   focus to refer a user to the conference without modifying the
1203	   <allowed-users-list> (in SIP terms, a participant is allowed to send
1204	   a REFER request to the focus which results in the focus sending a
1205	   REFER request to the user the referrer wishes to join the
1206	   conference).  If set to FALSE, the refer request is rejected.  If
1207	   this element is undefined it has a value of FALSE, causing the refer
1208	   to be rejected.

1210	4.6.5.8.  <allow-invite-users-dynamically>

1212	   The <allow-invite-users-dynamically> element represents a boolean
1213	   action.  If set to TRUE, a participant is allowed to instruct the
1214	   focus to invite a user to the conference without modifying the
1215	   <allowed-users-list> list (in SIP terms, a participant is allowed to
1216	   send a REFER request to the focus which results in the focus sending
1217	   an INVITE request to the user the referrer wishes to join the
1218	   conference).  If set to FALSE, the refer request is rejected.  If
1219	   this element is undefined it has a value of FALSE, causing the refer
1220	   to be rejected.

1222	4.6.5.9.  <allow-remove-users-dynamically>

1224	   The <allow-remove-users-dynamically> element represents a boolean
1225	   action.  If set to TRUE, a participant is allowed to instruct the
1226	   focus to remove a user from the conference without modifying the
1227	   ruleset (in SIP terms, a participant is allowed to send a REFER
1228	   request to the focus which results in the focus sending an BYE
1229	   request to the user the referrer wishes to leave the conference).  If
1230	   set to FALSE, the refer request is rejected.  If this element is
1231	   undefined it has a value of FALSE, causing the refer to be rejected.

1233	4.6.5.10.  <endpoint>

1235	   The <endpoint> child element is defined in [RFC4575].  It can provide
1236	   the desired level of detail about the user's devices and their
1237	   signaling sessions taking part in the conference.  The <endpoint>
1238	   element in this document does not defined the 'state' attribute
1239	   defined in [RFC4575] for the same element since the 'state' attribute
1240	   only applies to notification mechanisms.

1242	   The <endpoint> element has the following child elements: <display-
1243	   text>, <referred>, <status>, <joining-method>, <joining-info>,
1244	   <disconnection-method>, <disconnection-info>, <media>, <floor>,and
1245	   <call-info>.  All the <endpoint> child elements are defined in
1246	   [RFC4575] with the exception of the <floor> element.

1248	   The <floor> element describes a floor that joins this participant in
1249	   the conference.  If a participant, for instance, needs to talk in the
1250	   conference, it first needs to get the floor from the chair of the
1251	   conference.  The <floor> element has an attribute 'id' which uniquely
1252	   identifies a floor or floors within a conference.  The 'id' attribute
1253	   corresponds to the floor-id identifier defined in [RFC4582] section
1254	   5.2.2.  The <floor> element has a "Boolean" value.  A value of FALSE
1255	   indicates that this user does not hold the floor in this moment.  If
1256	   this control is not specified, this user SHOULD NOT specify the floor
1257	   option.

1259	   Besides the <floor> element, the <endpoint>/<media> element has two
1260	   other child elements defined in this document, the <to-mixer>, and
1261	   the <from-mixer>:

1263	   o  <from-mixer>, <to-mixer>: These are controls that apply to a
1264	      user's media stream being sent from the mixer to the participants
1265	      endpoint or to the mixer from the participants endpoint.  The <to-
1266	      mixer> element details properties associated with the incoming
1267	      streams to the mixer (streams sent to the mixer from the
1268	      participant).  The <from-mixer> element details properties
1269	      associated with the outgoing streams from the mixer (sent from the
1270	      mixer to the participant).  Both of these elements have the
1271	      attribute 'name'.  The 'name' attribute has the values "VideoIn",
1272	      "VideoOut", "AudioOut", and "AudioIn".  The "VideoOut" and
1273	      "AudioOut" media streams detail properties associated with the
1274	      outgoing video and audio from the mixer.  The "VideoIn" and
1275	      "AudioIn" media stream details properties associated with the
1276	      incoming video and audio to the mixer.  More values can be defined
1277	      in the future.  The <to-mixer> and <from-mixer> elements have the
1278	      <controls> child element:
1279	      *  Controls that apply to a specific user would appear under the
1280	         <controls> element.

1282	4.7.  <sidebars-by-ref>

1284	   The <sidebars-by-ref> element contains a set of <entry> child
1285	   elements.  This element is described in [RFC4575], 5.9.1.  Note that
1286	   the <sidebars-by-ref> element does not have the attribute 'state'
1287	   defined in [RFC4575] for this element because this attribute only
1288	   applies to notifications mechanism.

1290	4.8.  <sidebars-by-val>

1292	   The <sidebars-by-val> element contains a set of <entry> child
1293	   elements each containing information about a single sidebar.  This
1294	   element is described in [RFC4575], 5.9.2.  Note that the <sidebars-
1295	   by-val> element does not have the attribute 'state' defined in
1296	   [RFC4575] for this element because this attribute only applies to
1297	   notifications mechanism.

1299	5.  RELAX NG Schema

1301	   In accordance with the Centralized Conferencing Framework document
1302	   [RFC5239], the Conference Object is a logical representation of a
1303	   conference instance.  The conference information schema contains core
1304	   information that is utilized in any conference.  It also contains the
1305	   variable information part of the Conference Object.

1307	   The normative schema is backwards compatible with the [RFC5239], in
1308	   other words, valid [RFC5239] instance documents are also valid
1309	   according to this RELAX NG schema [RELAX].  In addition to
1310	   approximately similar RELAX NG [RELAX] definitions of the [RFC5239],
1311	   this schema contains extension elements in the
1312	   "urn:ietf:params:xml:ns:xcon-conference-info" namespace.

1314	 default namespace = "urn:ietf:params:xml:ns:conference-info"
1315	 namespace xcon = "urn:ietf:params:xml:ns:xcon-conference-info"

1317	 start = element conference-info { conference-type }
1318	 # CONFERENCE TYPE
1319	 conference-type =
1320	   attribute entity { text }
1321	   & anyAttribute
1322	   & conference-description-type?
1323	   & element host-info { host-type }?
1324	   & element conference-state { conference-state-type }?
1325	   & element users { users-type }?
1326	   & element sidebars-by-ref { uris-type }?
1327	   & element sidebars-by-val { sidebars-by-val-type }?
1328	   & element xcon:floor-information { floor-information-type }?
1329	   & anyElement*
1330	 # CONFERENCE DESCRIPTION TYPE
1331	 conference-description-type =
1332	   element conference-description {
1333	     attribute xml:lang { xsd:language }?
1334	     & anyAttribute
1335	     & element display-text { text }?
1336	     & element subject { text }?
1337	     & element free-text { text }?
1338	     & element keywords {
1339	         list { xsd:string* }
1340	       }?
1341	     & element conf-uris { uris-type }?
1342	     & element service-uris { uris-type }?
1343	     & element maximum-user-count { xsd:int }?
1344	     & element available-media { conference-media-type }?
1345	     & element xcon:language { xsd:language }?
1346	     & element xcon:allow-sidebars { xsd:boolean }?
1347	     & element xcon:cloning-parent { xsd:unsignedLong }?
1348	     & element xcon:sidebar-parent { xsd:unsignedLong }?
1349	     & element xcon:conference-time { conferencetime-type }?
1350	     & anyElement*
1351	   }
1352	 # HOST TYPE
1353	 host-type =
1354	   element display-text { text }?
1355	   & element web-page { xsd:anyURI }?
1356	   & element uris { uris-type }?
1357	   & anyElement*
1358	   & anyAttribute
1359	 # CONFERENCE STATE TYPE
1360	 conference-state-type =
1361	   anyAttribute
1362	   & element user-count { xsd:unsignedInt }?
1363	   & element active { xsd:boolean }?
1364	   & element locked { xsd:boolean }?
1365	   & element xcon:allow-conference-event-subscription { xsd:boolean }?
1366	   & anyElement*
1367	 # CONFERENCE MEDIA TYPE
1368	 conference-media-type =
1369	   anyAttribute
1370	   & element entry { conference-medium-type }*
1371	   & anyElement*
1372	 # CONFERENCE MEDIUM TYPE
1373	 conference-medium-type =
1374	   attribute label { text }
1375	   & anyAttribute
1376	   & element display-text { text }?
1377	   & element type { text }?
1378	   & element status { media-status-type }?
1379	   & element xcon:mixing-mode { mixing-mode-type }?
1380	   & element xcon:codecs { codecs-type }?
1381	   & element xcon:controls { control-type }?
1382	   & anyElement*
1383	 # URIs TYPE
1384	 uris-type =
1385	   anyAttribute
1386	   & element entry { uri-type }*
1387	   & anyElement*
1388	 # URI TYPE
1389	 uri-type =
1390	   element uri { xsd:anyURI }
1391	   & element display-text { text }?
1392	   & element purpose { text }?
1393	   & element modified { execution-type }?
1394	   & element xcon:conference-password { text }?
1395	   & anyElement*
1396	   & anyAttribute
1397	 # USERS TYPE
1398	 users-type =
1399	   anyAttribute
1400	   & element user { user-type }*
1401	   & element xcon:join-handling { join-handling-type }?
1402	   & element xcon:user-admission-policy { user-admission-policy-type }?
1403	   & element xcon:allowed-users-list { allowed-users-list-type }?
1404	   & element xcon:deny-users-list { deny-user-list-type }?
1405	   & anyElement*
1406	 # USER TYPE
1407	 user-type =
1408	   attribute entity { xsd:anyURI }
1409	   & anyAttribute
1410	   & element display-text { text }?
1411	   & element associated-aors { uris-type }?
1412	   & element roles {
1413	       element entry { single-role-type }+
1414	     }?
1415	   & element languages {
1416	       list { xsd:language }
1417	     }?
1418	   & element cascaded-focus { xsd:anyURI }?
1419	   & element endpoint { endpoint-type }*
1420	   & element xcon:provide-anonymity { provide-anonymity-type }?
1421	   & element xcon:allow-refer-users-dynamically { xsd:boolean }?
1422	   & element xcon:allow-invite-users-dynamically { xsd:boolean }?
1423	   & element xcon:allow-remove-users-dynamically { xsd:boolean }?
1424	   & anyElement*
1425	 # ENDPOINT TYPE
1426	 endpoint-type =
1427	   attribute entity { text }
1428	   & anyAttribute
1429	   & element display-text { text }?
1430	   & element referred { execution-type }?
1431	   & element status { endpoint-status-type }?
1432	   & element joining-method { joining-type }?
1433	   & element joining-info { execution-type }?
1434	   & element disconnection-method { disconnection-type }?
1435	   & element disconnection-info { execution-type }?
1436	   & element media { media-type }*
1437	   & element call-info { call-type }?
1438	   & element xcon:floor {
1439	       attribute id { text },
1440	       anyAttribute,
1441	       xsd:boolean
1442	     }*

1444	   & anyElement*
1445	 # ENDPOINT STATUS TYPE
1446	 endpoint-status-type =
1447	   "pending"
1448	   | "dialing-out"
1449	   | "dialing-in"
1450	   | "alerting"
1451	   | "on-hold"
1452	   | "connected"
1453	   | "muted-via-focus"
1454	   | "disconnecting"
1455	   | "disconnected"
1456	   | free-text-extension
1457	 # JOINING TYPE
1458	 joining-type =
1459	   "dialed-in" | "dialed-out" | "focus-owner" | free-text-extension
1460	 # DISCONNECTION TYPE
1461	 disconnection-type =
1462	   "departed" | "booted" | "failed" | "busy" | free-text-extension
1463	 # EXECUTION TYPE
1464	 execution-type =
1465	   element when { xsd:dateTime }?
1466	   & element reason { text }?
1467	   & element by { xsd:anyURI }?
1468	   & anyAttribute
1469	 # CALL TYPE
1470	 call-type =
1471	   element sip { sip-dialog-id-type }
1472	   & anyElement*
1473	   & anyAttribute
1474	 # SIP DIALOG ID TYPE
1475	 sip-dialog-id-type =
1476	   element display-text { text }?
1477	   & element call-id { text }
1478	   & element from-tag { text }
1479	   & element to-tag { text }
1480	   & anyElement*
1481	   & anyAttribute
1482	 # MEDIA TYPE
1483	 media-type =
1484	   attribute id { xsd:int }
1485	   & anyAttribute
1486	   & element display-text { text }?
1487	   & element type { text }?
1488	   & element label { text }?
1489	   & element src-id { text }?
1490	   & element status { media-status-type }?
1491	   & element xcon:to-mixer { mixer-type }?
1492	   & element xcon:from-mixer { mixer-type }?
1493	   & anyElement*
1494	 # MEDIA STATUS TYPE
1495	 media-status-type =
1496	   "recvonly"
1497	   | "sendonly"
1498	   | "sendrecv"
1499	   | "inactive"
1500	   | free-text-extension
1501	 # SIDEBARS-BY-VAL TYPE
1502	 sidebars-by-val-type =
1503	   anyAttribute
1504	   & element entry { conference-type }*
1505	   & anyElement*
1506	 # CONFERENCE TIME
1507	 conferencetime-type =
1508	   anyAttribute
1509	   & element xcon:entry {
1510	       element xcon:base { text },
1511	       element xcon:mixing-start-offset {
1512	         time-type,
1513	         attribute required-participant { single-role-type },
1514	         anyAttribute
1515	       }?,
1516	       element xcon:mixing-end-offset {
1517	         time-type,
1518	         attribute required-participant { single-role-type },
1519	         anyAttribute
1520	       }?,
1521	       element xcon:can-join-after-offset { time-type }?,
1522	       element xcon:must-join-before-offset { time-type }?,
1523	       element xcon:request-user { time-type }?,
1524	       element xcon:notify-end-of-conference { xsd:int }?,
1525	       element xcon:allowed-extend-mixing-end-offset { xsd:boolean }?,
1526	       anyElement*
1527	     }*
1528	 # TIME TYPE
1529	 time-type = xsd:dateTime { pattern = ".+T.+Z.*" }
1530	 # SINGLE ROLE TYPE
1531	 single-role-type =
1532	   xsd:string "none"
1533	   | xsd:string "administrator"
1534	   | xsd:string "moderator"
1535	   | xsd:string "user"
1536	   | xsd:string "observer"
1537	   | xsd:string "participant"
1538	   | free-text-extension
1539	 # MIXING MODE TYPE
1540	 mixing-mode-type =
1541	   xsd:string "moderator-controlled"
1542	   | xsd:string "FCFS"
1543	   | xsd:string "automatic"
1544	   | free-text-extension
1545	 # CODECS TYPE
1546	 codecs-type =
1547	   attribute decision { decision-type }
1548	   & anyAttribute
1549	   & element xcon:codec { codec-type }*
1550	   & anyElement*
1551	 # CODEC TYPE
1552	 codec-type =
1553	   attribute name { text }
1554	   & attribute policy { policy-type }
1555	   & anyAttribute
1556	   & element xcon:subtype { text }?
1557	   & anyElement*
1558	 # DECISION TYPE
1559	 decision-type =
1560	   xsd:string "automatic"
1561	   | xsd:string "moderator-controlled"
1562	   | free-text-extension
1563	 # POLICY TYPE
1564	 policy-type =
1565	   xsd:string "allowed" | xsd:string "disallowed" | free-text-extension
1566	 # CONTROL TYPE
1567	 control-type =
1568	   anyAttribute
1569	   & element xcon:mute { xsd:boolean }?
1570	   & element xcon:pause-video { xsd:boolean }?
1571	   & element xcon:gain { gain-type }?
1572	   & element xcon:video-layout { video-layout-type }?
1573	   & anyElement*
1574	 # GAIN TYPE
1575	 gain-type = xsd:int { minInclusive = "-127" maxInclusive = "127" }
1576	 # VIDEO LAYOUT TYPE
1577	 video-layout-type =
1578	   xsd:string "single-view"
1579	   | xsd:string "dual-view"
1580	   | xsd:string "dual-view-crop"
1581	   | xsd:string "dual-view-2x1"
1582	   | xsd:string "dual-view-2x1-crop"
1583	   | xsd:string "quad-view"
1584	   | xsd:string "multiple-3x3"
1585	   | xsd:string "multiple-4x4"
1586	   | xsd:string "multiple-5x1"
1587	   | xsd:string "automatic"
1588	   | free-text-extension
1589	 # FLOOR INFORMATION TYPE
1590	 floor-information-type =
1591	   anyAttribute
1592	   & element xcon:conference-ID { xsd:unsignedLong }?
1593	   & element xcon:allow-floor-events { xsd:boolean }?
1594	   & element xcon:floor-request-handling { floor-request-type }?
1595	   & element xcon:conference-floor-policy { conference-floor-policy }?
1596	   & anyElement*
1597	 # FLOOR REQUEST TYPE
1598	 floor-request-type =
1599	   xsd:string "block" | xsd:string "confirm" | free-text-extension
1600	 # CONFERENCE FLOOR POLICY
1601	 conference-floor-policy =
1602	   anyAttribute
1603	   & element xcon:floor {
1604	       attribute id { text }
1605	       & anyAttribute
1606	       & element xcon:media-label { xsd:nonNegativeInteger }+
1607	       & element xcon:algorithm { algorithm-type }?
1608	       & element xcon:max-floor-users { xsd:nonNegativeInteger }?
1609	       & element xcon:moderator-id { xsd:nonNegativeInteger }?
1610	       & anyElement*
1611	     }+
1612	 # ALGORITHM POLICY
1613	 algorithm-type =
1614	   xsd:string "moderator-controlled"
1615	   | xsd:string "FCFS"
1616	   | xsd:string "random"
1617	   | free-text-extension
1618	 # USERS ADMISSION POLICY
1619	 user-admission-policy-type =
1620	   xsd:string "closedAuthenticated"
1621	   | xsd:string "openAuthenticated"
1622	   | xsd:string "anonymous"
1623	   | free-text-extension
1624	 # JOIN HANDLING TYPE
1625	 join-handling-type =
1626	   xsd:string "block"
1627	   | xsd:string "confirm"
1628	   | xsd:string "allow"
1629	   | xsd:string "authenticate"
1630	   | xsd:string "directed-operator"
1631	   | free-text-extension
1632	 # DENY USERLIST
1633	 deny-user-list-type =
1634	   anyAttribute
1635	   & element xcon:target {
1636	       attribute uri { xsd:anyURI },
1637	       anyAttribute
1638	     }*
1639	   & anyElement*
1640	 # ALLOWED USERS LIST TYPE
1641	 allowed-users-list-type =
1642	   anyAttribute
1643	   & element xcon:target { target-type }*
1644	   & element xcon:persistent-list { persistent-list-type }?
1645	   & anyElement*
1646	 # PERSISTENT LIST TYPE
1647	 persistent-list-type =
1648	   element xcon:user {
1649	     attribute name { text }
1650	     & attribute nickname { text }
1651	     & attribute id { text }
1652	     & anyAttribute
1653	     & element xcon:e-mail { text }*
1654	     & anyElement*
1655	   }*
1656	   & anyElement*
1657	 # TARGET TYPE
1658	 target-type =
1659	   attribute uri { xsd:anyURI },
1660	   attribute method { method-type },
1661	   anyAttribute
1662	 # METHOD TYPE
1663	 method-type =
1664	   xsd:string "dial-in"
1665	   | xsd:string "dial-out"
1666	   | xsd:string "refer"
1667	   | free-text-extension
1668	 # ANONYMITY TYPE
1669	 provide-anonymity-type =
1670	   "private" | "semi-private" | "hidden" | free-text-extension
1671	 # MIXER TYPE
1672	 mixer-type =
1673	   attribute name { mixer-name-type }
1674	   & anyAttribute
1675	   & element xcon:controls { control-type }*
1676	   & anyElement*
1677	 # MIXER NAME TYPE
1678	 mixer-name-type =
1679	   "VideoIn" | "VideoOut" | "AudioOut" | "AudioIn" | free-text-extension

1681	 # FREE TEXT EXTENSION
1682	 # (re-define this as <notAllowed>,
1683	 #  if extensions beyond this spec are not used)
1684	 free-text-extension = text

1686	 # *********************************
1687	 # EXTENSIBILITY OF THE SCHEMA
1688	 # *********************************

1690	 # EXTENSIBILITY ELEMENTS
1691	 # (re-define this as <empty/>,
1692	 #  if extensions beyond this spec are not used)

1694	 anyElement =
1695	   element * - (conference-description
1696	                | host-info
1697	                | conference-state
1698	                | users
1699	                | sidebars-by-ref
1700	                | sidebars-by-val
1701	                | display-text
1702	                | subject
1703	                | free-text
1704	                | keywords
1705	                | conf-uris
1706	                | service-uris
1707	                | maximum-user-count
1708	                | available-media
1709	                | web-page
1710	                | uris
1711	                | uri
1712	                | user-count
1713	                | active
1714	                | locked
1715	                | entry
1716	                | type
1717	                | status
1718	                | purpose
1719	                | modified
1720	                | user
1721	                | associated-aors
1722	                | roles
1723	                | languages
1724	                | cascaded-focus
1725	                | endpoint
1726	                | referred
1727	                | joining-method
1728	                | joining-info
1729	                | disconnection-method
1730	                | disconnection-info
1731	                | media
1732	                | call-info
1733	                | when
1734	                | reason
1735	                | by
1736	                | sip
1737	                | call-id
1738	                | from-tag
1739	                | to-tag
1740	                | label
1741	                | src-id
1742	                | xcon:conference-password
1743	                | xcon:mixing-mode
1744	                | xcon:codecs
1745	                | xcon:controls
1746	                | xcon:language
1747	                | xcon:allow-sidebars
1748	                | xcon:cloning-parent
1749	                | xcon:sidebar-parent
1750	                | xcon:allow-conference-event-subscription
1751	                | xcon:to-mixer
1752	                | xcon:provide-anonymity
1753	                | xcon:allow-refer-users-dynamically
1754	                | xcon:allow-invite-users-dynamically
1755	                | xcon:allow-remove-users-dynamically
1756	                | xcon:from-mixer
1757	                | xcon:join-handling
1758	                | xcon:user-admission-policy
1759	                | xcon:allowed-users-list
1760	                | xcon:deny-users-list
1761	                | xcon:floor-information
1762	                | xcon:conference-time
1763	                | xcon:provide-anonymity
1764	                | xcon:floor
1765	                | xcon:entry
1766	                | xcon:mixing-start-offset
1767	                | xcon:mixing-end-offset
1768	                | xcon:can-join-after-offset
1769	                | xcon:must-join-before-offset
1770	                | xcon:request-user
1771	                | xcon:notify-end-of-conference
1772	                | xcon:allowed-extend-mixing-end-offset
1773	                | xcon:codec
1774	                | xcon:subtype
1775	                | xcon:mute
1776	                | xcon:pause-video
1777	                | xcon:gain
1778	                | xcon:video-layout
1779	                | xcon:conference-ID
1780	                | xcon:allow-floor-events
1781	                | xcon:floor-request-handling
1782	                | xcon:conference-floor-policy
1783	                | xcon:media-label
1784	                | xcon:algorithm
1785	                | xcon:max-floor-users
1786	                | xcon:moderator-id
1787	                | xcon:target
1788	                | xcon:persistent-list
1789	                | xcon:e-mail
1790	                | xcon:user) { anyExtension }
1791	 anyExtension =
1792	   (attribute * { text }
1793	    | any)*
1794	 any =
1795	   element * {
1796	     (attribute * { text }
1797	      | text
1798	      | any)*
1799	   }

1801	 # EXTENSIBILITY ATTRIBUTES
1802	 # (re-define this as <empty/>,
1803	 #  if extensions beyond this spec are not used)

1805	 anyAttribute =
1806	   attribute * - (xml:lang
1807	                  | entity
1808	                  | required-participant
1809	                  | label
1810	                  | decision
1811	                  | name
1812	                  | policy
1813	                  | uri
1814	                  | method
1815	                  | id
1816	                  | nickname) { text }*

1818	6.  XML Schema Extensibility

1820	   The Conference Information Data Model defined in this document is
1821	   meant to be extensible toward specific application domains.  Such
1822	   extensions are accomplished by defining elements, child elements and
1823	   attributes that are specific to the desired application domain.  The
1824	   IETF MAY extend the data model schema with unqualified attributes or
1825	   extension elements from the "urn:ietf:params:xml:ns:" "sub-namespace"
1826	   in the future.  Other instances are free to define extension elements
1827	   or attributes under other namespaces.

1829	   Elements or attributes from unknown namespaces MUST be ignored.

1831	7.  XML Example

1833	   The following is an example of a conference information document.
1834	   The conference starts on October 17, 2007, at 10:30 AM in New York
1835	   City and finishes the same day at 12:30 PM every week.  In this
1836	   example, there are currently 3 participants in a conference, one
1837	   administrator, one moderator, and one participant.  Sidebars are
1838	   allowed in this conference and ,consequently, there is one sidebar in
1839	   the conference.  In addition, Alice and Carol are using a floor in
1840	   the main conference to manage the audio and video resources.  At the
1841	   moment, Alice is assigned to use the floor.

1843	<?xml version="1.0" encoding="UTF-8"?>
1844	<conference-info
1845	        xmlns="urn:ietf:params:xml:ns:conference-info"
1846	        xmlns:xcon="urn:ietf:params:xml:ns:xcon-conference-info"
1847	        entity="conference123@example.com">
1848	        <!--
1849	            CONFERENCE DESCRIPTION
1850	        -->
1851	        <conference-description xml:lang="en-us">
1852	            <display-text>Discussion of Formula-1 racing</display-text>
1853	            <subject>Sports:Formula-1</subject>
1854	            <free-text>This is a conference example</free-text>
1855	            <keywords>Formula-1 cars</keywords>
1856	            <!--
1857	                CONFERENCE UNIQUE IDENTIFIERS
1858	            -->
1859	            <conf-uris>
1860	                <entry>
1861	                    <uri>tel:+3585671234</uri>
1862	                    <display-text>Conference Bridge</display-text>
1863	                    <purpose>participation</purpose>
1864	                    <xcon:conference-password
1865	                     >5678</xcon:conference-password>
1866	                </entry>
1867	                <entry>
1868	                    <uri>http://www.example.com/live.ram</uri>
1869	                    <purpose>streaming</purpose>
1870	                </entry>
1871	            </conf-uris>
1872	            <!--
1873	                SERVICE URIS

1875	            -->
1876	            <service-uris>
1877	                <entry>
1878	                    <uri>mailto:bob@example.com</uri>
1879	                    <display-text>email</display-text>
1880	                </entry>
1881	            </service-uris>
1882	            <!--
1883	                MAXIMUM USER COUNT
1884	            -->
1885	            <maximum-user-count>50</maximum-user-count>
1886	            <!--
1887	                AVAILABLE MEDIA
1888	            -->
1889	            <available-media>
1890	                <entry label="10234">
1891	                    <display-text>main audio</display-text>
1892	                    <type>audio</type>
1893	                    <status>sendrecv</status>
1894	                    <xcon:mixing-mode>automatic</xcon:mixing-mode>
1895	                    <xcon:codecs decision="automatic">
1896	                        <xcon:codec name="122" policy="allowed">
1897	                           <xcon:subtype>PCMU</xcon:subtype>
1898	                        </xcon:codec>
1899	                    </xcon:codecs>
1900	                    <xcon:controls>
1901	                        <xcon:mute>true</xcon:mute>
1902	                        <xcon:gain>50</xcon:gain>
1903	                    </xcon:controls>
1904	                </entry>
1905	                <entry label="10235">
1906	                    <display-text>main video</display-text>
1907	                    <type>video</type>
1908	                    <status>sendrecv</status>
1909	                    <xcon:mixing-mode>automatic</xcon:mixing-mode>
1910	                    <xcon:codecs decision="automatic">
1911	                        <xcon:codec name="123" policy="allowed">
1912	                           <xcon:subtype>H.263</xcon:subtype>
1913	                        </xcon:codec>
1914	                    </xcon:codecs>
1915	                    <xcon:controls>
1916	                        <xcon:video-layout
1917	                          >single-view</xcon:video-layout>
1918	                    </xcon:controls>
1919	                </entry>
1920	            </available-media>

1922	            <xcon:language>En-us</xcon:language>
1923	            <xcon:allow-sidebars>true</xcon:allow-sidebars>
1924	            <!--
1925	                CONFERENCE TIME
1926	            -->

1928	            <xcon:conference-time>
1929	                <xcon:entry>
1930	                    <xcon:base>BEGIN:VCALENDAR
1931	  PRODID:-//LlamaSpinner Inc.//NONSGML CamelCall//EN
1932	  VERSION:2.0
1933	  BEGIN:VEVENT
1934	  DTSTAMP:20071003T140728Z
1935	  UID:20071003T140728Z-345FDA-carol@example.com
1936	  ORGANIZER:MAILTO:carol@example.com
1937	  DTSTART:20071017T143000Z
1938	  RRULE:FREQ=WEEKLY
1939	  DTEND:20071217T163000Z
1940	  END:VEVENT
1941	  END:VCALENDAR</xcon:base>
1942	                    <xcon:mixing-start-offset
1943	                        required-participant="moderator"
1944	                       >2007-10-17T14:29:00Z</xcon:mixing-start-offset>
1945	                    <xcon:mixing-end-offset
1946	                        required-participant="participant"
1947	                       >2007-10-17T16:31:00Z</xcon:mixing-end-offset>
1948	                    <xcon:must-join-before-offset
1949	                       >2007-10-17T15:30:00Z
1950	                       </xcon:must-join-before-offset>
1951	                </xcon:entry>
1952	            </xcon:conference-time>

1954	        </conference-description>
1955	        <!--
1956	            HOST INFO
1957	        -->
1958	        <host-info>
1959	            <display-text>Formula1</display-text>
1960	            <web-page>http://www.example.com/formula1/</web-page>
1961	            <uris>
1962	                <entry>
1963	                    <uri>sip:alice@example.com</uri>
1964	                </entry>
1965	                <entry>
1966	                    <uri>sip:carol@example.com</uri>
1967	                </entry>
1968	            </uris>
1969	        </host-info>
1970	        <!--
1971	            CONFERENCE STATE
1972	        -->
1973	        <conference-state>
1974	            <user-count>3</user-count>
1975	            <active>true</active>
1976	            <locked>false</locked>
1977	            <xcon:allow-conference-event-subscription
1978	              >true</xcon:allow-conference-event-subscription>

1980	       </conference-state>
1981	        <!--
1982	            USERS
1983	        -->
1984	        <users>
1985	            <!--
1986	                USER BOB
1987	            -->
1988	            <user entity="bob534">
1989	                <display-text>Bob Hoskins</display-text>
1990	                <associated-aors>
1991	                    <entry>
1992	                        <uri>mailto:bob@example.com</uri>
1993	                        <display-text>email</display-text>
1994	                    </entry>
1995	                </associated-aors>
1996	                <roles>
1997	                    <entry>participant</entry>
1998	                </roles>
1999	                <languages>en-us</languages>

2001	                <!--
2002	                    ENDPOINTS
2003	                -->
2004	                <endpoint entity="sip:bob@example.com">
2005	                    <display-text>Bob's Laptop</display-text>
2006	                    <referred>
2007	                        <when>2007-10-17T14:00:00Z</when>
2008	                        <reason>expert required</reason>
2009	                        <by>sip:alice@example.com</by>
2010	                    </referred>
2011	                    <status>connected</status>
2012	                    <joining-method>dialed-out</joining-method>
2013	                    <joining-info>
2014	                        <when>2007-10-17T14:00:00Z</when>
2015	                        <reason>invitation</reason>
2016	                        <by>sip:alice@example.com</by>
2017	                    </joining-info>
2018	                    <!--
2019	                        MEDIA
2020	                    -->
2021	                    <media id="1">
2022	                        <type>video</type>
2023	                        <label>10235</label>
2024	                        <src-id>432424</src-id>
2025	                        <status>sendrecv</status>
2026	                        <xcon:to-mixer name="VideoIn">
2027	                            <xcon:controls>
2028	                                <xcon:video-layout
2029	                                   >single-view</xcon:video-layout>
2030	                            </xcon:controls>
2031	                        </xcon:to-mixer>
2032	                    </media>
2033	                    <!--
2034	                        CALL INFO
2035	                    -->
2036	                    <call-info>
2037	                        <sip>
2038	                            <display-text>full info</display-text>
2039	                            <call-id>hsjh8980vhsb78</call-id>
2040	                            <from-tag>vav738dvbs</from-tag>
2041	                            <to-tag>8954jgjg8432</to-tag>
2042	                        </sip>
2043	                    </call-info>
2044	                </endpoint>
2045	                <xcon:provide-anonymity
2046	                 >semi-private</xcon:provide-anonymity>
2047	                 <xcon:allow-refer-users-dynamically
2048	                    >false</xcon:allow-refer-users-dynamically>
2049	                <xcon:allow-invite-users-dynamically
2050	                    >false</xcon:allow-invite-users-dynamically>
2051	                <xcon:allow-remove-users-dynamically
2052	                    >false</xcon:allow-remove-users-dynamically>
2053	            </user>

2055	            <!--
2056	                USER ALICE
2057	            -->
2058	            <user entity="alice334">
2059	                <display-text>Alice Kay</display-text>
2060	                <associated-aors>
2061	                    <entry>
2062	                        <uri>mailto:alice@example.com</uri>
2063	                        <display-text>email</display-text>
2064	                    </entry>
2065	                </associated-aors>
2066	                <roles>
2067	                    <entry>moderator</entry>
2068	                </roles>
2069	                <languages>en-us</languages>
2070	                <!--
2071	                    ENDPOINTS
2072	                -->
2073	                <endpoint entity="sip:alice@example.com">
2074	                    <display-text>Alice's Desktop</display-text>
2075	                    <status>connected</status>
2076	                    <joining-method>dialed-in</joining-method>
2077	                    <joining-info>
2078	                        <when>2007-10-17T13:35:08Z</when>
2079	                        <reason>invitation</reason>
2080	                        <by>sip:conference@example.com</by>
2081	                    </joining-info>
2082	                    <!--
2083	                        MEDIA
2084	                    -->
2085	                    <media id="1">
2086	                        <type>video</type>
2087	                        <label>10235</label>
2088	                        <src-id>432424</src-id>
2089	                        <status>sendrecv</status>
2090	                        <xcon:to-mixer name="VideoIn">
2091	                         <xcon:controls>
2092	                            <xcon:video-layout
2093	                              >single-view</xcon:video-layout>
2094	                         </xcon:controls>
2095	                        </xcon:to-mixer>
2096	                    </media>
2097	                    <media id="2">
2098	                        <type>audio</type>
2099	                        <label>10234</label>
2100	                        <src-id>532535</src-id>
2101	                        <status>sendrecv</status>
2102	                        <xcon:to-mixer name="VideoIn">
2103	                          <xcon:controls>
2104	                            <xcon:gain>50</xcon:gain>
2105	                          </xcon:controls>
2106	                        </xcon:to-mixer>
2107	                        <xcon:from-mixer name="VideoOut">
2108	                          <xcon:controls>
2109	                              <xcon:gain>50</xcon:gain>
2110	                          </xcon:controls>
2111	                        </xcon:from-mixer>
2112	                    </media>
2113	                    <!--
2114	                        CALL INFO

2116	                    -->
2117	                    <call-info>
2118	                        <sip>
2119	                            <display-text>full info</display-text>
2120	                            <call-id>truy45469123478</call-id>
2121	                            <from-tag>asd456cbgt</from-tag>
2122	                            <to-tag>3456jgjg1234</to-tag>
2123	                        </sip>
2124	                    </call-info>
2125	                    <xcon:floor id="345">true</xcon:floor>
2126	                </endpoint>
2127	                <xcon:provide-anonymity>private</xcon:provide-anonymity>
2128	                <xcon:allow-refer-users-dynamically
2129	                    >true</xcon:allow-refer-users-dynamically>
2130	                <xcon:allow-invite-users-dynamically
2131	                    >true</xcon:allow-invite-users-dynamically>
2132	                <xcon:allow-remove-users-dynamically
2133	                    >true</xcon:allow-remove-users-dynamically>
2134	            </user>

2136	            <!--
2137	                USER CAROL
2138	            -->
2139	            <user entity="carol233">
2140	                <display-text>Carol More</display-text>
2141	                <associated-aors>
2142	                    <entry>
2143	                        <uri>mailto:carol@example.com</uri>
2144	                        <display-text>email</display-text>
2145	                    </entry>
2146	                </associated-aors>
2147	                <roles>
2148	                    <entry>administrator</entry>
2149	                </roles>
2150	                <languages>en-us</languages>
2151	                <!--
2152	                    ENDPOINTS
2153	                -->
2154	                <endpoint entity="sip:carol@example.com">
2155	                    <display-text>Carol's Computer</display-text>
2156	                    <status>connected</status>
2157	                    <joining-method>dialed-in</joining-method>
2158	                    <joining-info>
2159	                        <when>2007-10-17T13:30:05Z</when>
2160	                        <reason>invitation</reason>
2161	                        <by>sip:conference@example.com</by>
2162	                    </joining-info>
2163	                    <!--
2164	                        MEDIA
2165	                    -->
2166	                    <media id="1">
2167	                        <type>video</type>
2168	                        <label>10235</label>
2169	                        <src-id>432424</src-id>
2170	                        <status>sendrecv</status>
2171	                        <xcon:to-mixer name="VideoIn">
2172	                            <xcon:controls>
2173	                                <xcon:video-layout
2174	                              >single-view</xcon:video-layout>
2175	                         </xcon:controls>
2176	                        </xcon:to-mixer>
2177	                    </media>
2178	                    <media id="2">
2179	                        <type>audio</type>
2180	                        <label>10234</label>
2181	                        <src-id>532535</src-id>
2182	                        <status>sendrecv</status>
2183	                        <xcon:to-mixer name="VideoIn">
2184	                            <xcon:controls>
2185	                                <xcon:gain>50</xcon:gain>
2186	                            </xcon:controls>
2187	                        </xcon:to-mixer>
2188	                        <xcon:from-mixer name="VideoOut">
2189	                            <xcon:controls>
2190	                                <xcon:gain>50</xcon:gain>
2191	                          </xcon:controls>
2192	                        </xcon:from-mixer>
2193	                    </media>
2194	                    <!--
2195	                        CALL INFO
2196	                    -->
2197	                    <call-info>
2198	                        <sip>
2199	                            <display-text>full info</display-text>
2200	                            <call-id>wevb12562321894</call-id>
2201	                            <from-tag>asw456wedf</from-tag>
2202	                            <to-tag>2365dfrt3497</to-tag>
2203	                        </sip>
2204	                    </call-info>

2206	                    <xcon:floor id="345">false</xcon:floor>
2207	                </endpoint>

2209	                <xcon:provide-anonymity>private</xcon:provide-anonymity>
2210	                <xcon:allow-refer-users-dynamically
2211	                    >true</xcon:allow-refer-users-dynamically>

2213	                <xcon:allow-invite-users-dynamically
2214	                    >true</xcon:allow-invite-users-dynamically>
2215	                <xcon:allow-remove-users-dynamically
2216	                    >true</xcon:allow-remove-users-dynamically>

2218	            </user>

2220	            <xcon:join-handling>allow</xcon:join-handling>
2221	            <xcon:user-admission-policy
2222	               >openAuthenticated</xcon:user-admission-policy>
2223	            <!--
2224	                ALLOWED USERS LIST
2225	            -->
2226	            <xcon:allowed-users-list>
2227	                <xcon:target uri="sip:bob@example.com"
2228	                    method="dial-out"/>
2229	                <xcon:target uri="sip:alice@example.com"
2230	                    method="dial-out"/>
2231	                <xcon:target uri="sip:carol@example.com"
2232	                    method="dial-out"/>
2233	                <xcon:target uri="sip:john@example.com"
2234	                    method="refer"/>
2235	            </xcon:allowed-users-list>
2236	            <!--
2237	                DENY USERS LIST
2238	            -->
2239	            <xcon:deny-users-list>
2240	                <xcon:target uri="sip:charlie@example.com"/>
2241	            </xcon:deny-users-list>
2242	        </users>
2243	        <!--
2244	            SIDEBARS BY REFERENCE
2245	        -->
2246	        <sidebars-by-ref>
2247	            <entry>
2248	                <uri>conf223</uri>
2249	                <display-text>private with Bob</display-text>
2250	            </entry>
2251	        </sidebars-by-ref>
2252	        <!--
2253	            SIDEBARS BY VALUE
2254	        -->
2255	        <sidebars-by-val>
2256	            <entry entity="conf223">
2257	                <users>
2258	                    <user entity="bob534"/>
2259	                    <user entity="carol233"/>
2260	                </users>

2262	            </entry>
2263	        </sidebars-by-val>
2264	        <!--
2265	            FLOOR INFORMATION
2266	        -->
2267	        <xcon:floor-information>
2268	            <xcon:conference-ID>567</xcon:conference-ID>
2269	            <xcon:allow-floor-events>true</xcon:allow-floor-events>
2270	            <xcon:floor-request-handling
2271	             >confirm</xcon:floor-request-handling>

2273	            <xcon:conference-floor-policy>
2274	                <xcon:floor id="345">
2275	                    <xcon:media-label>10234</xcon:media-label>
2276	                    <xcon:media-label>10235</xcon:media-label>
2277	                    <xcon:algorithm
2278	                     >moderator-controlled</xcon:algorithm>
2279	                    <xcon:max-floor-users>1</xcon:max-floor-users>
2280	                    <xcon:moderator-id>234</xcon:moderator-id>
2281	                </xcon:floor>
2282	            </xcon:conference-floor-policy>
2283	        </xcon:floor-information>

2285	    </conference-info>

2287	   Note that due to RFC formatting conventions, this documents splits
2288	   lines whose content would exceed 72 characters.  Two backslash
2289	   characters mark where line folding has taken place.  These
2290	   backslashes would not appear in the actual XML data model.

2292	8.  Security Considerations

2294	   There are numerous security considerations for this document.  This
2295	   section considers them.

2297	8.1.  Authentication

2299	   Different conferencing protocols will support different types of
2300	   authentication mechanisms.  Since a variety of signaling protocols
2301	   are possible, a variety of authentication mechanism may need to be
2302	   mapped from the different protocols.

2304	   Futhermore, users may use different namespaces to access to a
2305	   conference.  So a mapping database has to specify the acceptable
2306	   range of namespace for a user.  Doing so, a users will not access the
2307	   same conference twice using a different namespace.

2309	   The security considerations for authentication (section 10.1)
2310	   described in the centralized conferencing framework [RFC4575] applies
2311	   to this document.  The focus must ensure that only authorized
2312	   entities are able to manipulate the data to access the information.

2314	8.2.  Confidentiality

2316	   Participants of a conference may not want to reveal some private
2317	   information to other users.  The Conference Information Data Model
2318	   contains sensitive data which should not be analyzed or given to
2319	   anyone.  Confidentiality is provided through encryption.  Strong end-
2320	   to-end authentication and encryption can be done using public keys,
2321	   and end-to-end encryption can be done using private keys.  It is
2322	   RECOMMENDED that the protocols that manipulated the conference
2323	   information data model use a strong encryption for conference
2324	   information protection.

2326	8.3.  Integrity

2328	   A conferencing system may maintain a mapping database between the
2329	   conference object identifiers and the identifiers associated with
2330	   each of the complementary centralized conferencing protocols, as well
2331	   as, a mapping between the conference user identifiers and the
2332	   identifiers associated with each user in a conference.  This mapping
2333	   database contains sensitive data.  It is RECOMMENDED that the mapping
2334	   database has integrity when it is established, the integrity has to
2335	   be protected, and the database has to be maintained to ensure changes
2336	   in namespaces are accurately reflected.

2338	9.  IANA Considerations

2340	9.1.  Relax NG Schema Registration
2341	  This specification registers a schema. The schema can be found
2342	  as the sole content of Section 5.

2344	     URI:  urn:ietf:params:xml:ns:xcon-conference-info

2346	     Registrant Contact: IETF XCON working group,
2347	        <xcon@ietf.org>, Oscar Novo
2348	        <Oscar.Novo@ericsson.com>

2350	     Relax NG Schema:  The Relax NG schema to be registered is contained
2351	        in Section 5.  Its first line is

2353	     namespace a = "http://relaxng.org/ns/compatibility/annotations/1.0"

2355	        and its last line is

2357	     disconnection-type = "departed" | "booted" | "failed" | "busy"

2359	9.2.  XML Namespace Registration
2360	   This section registers a new XML namespace.

2362	      URI:  urn:ietf:params:xml:ns:xcon-conference-info

2364	      Registrant Contact: IETF XCON working group,
2365	         <xcon@ietf.org>, Oscar Novo
2366	         <Oscar.Novo@ericsson.com>

2368	       XML:

2370	         BEGIN
2371	         <?xml version="1.0"?>
2372	         <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
2373	           "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
2374	         <html xmlns="http://www.w3.org/1999/xhtml">
2375	         <head>
2376	           <meta http-equiv="content-type"
2377	                 content="text/html;charset=iso-8859-1"/>
2378	           <title> Centralized Conferencing Namespace</title>
2379	         </head>
2380	         <body>
2381	           <h1>Namespace for Centralized Conferencing</h1>
2382	           <h2>urn:ietf:params:xml:ns:xcon-conference-info</h2>
2383	         <p>See <a href="[URL of published RFC]">RFCXXXX
2384	             [NOTE TO IANA/RFC-EDITOR:
2385	              Please replace XXXX with the RFC number of this
2386	             specification.]</a>.</p>
2387	         </body>
2388	         </html>
2389	         END

2391	9.3.  Conference Object Identifier Registration

2393	 The IANA is requested to register the following URI scheme
2394	 under the Permanent URI Schemes register.

2396	 XCON-URI = "xcon" ":" [conf-object-id "@"] host [ ":" port ] [RFC xxxx]

2398	  conf-object-id = 1*( unreserved / "+" / "=" / "/" )

2400	   host, port, and unreserved are defined in RFC3986[RFC3986]

2402	   [Note to the RFC Editor: replace xxxx with the number this RFC gets
2403	   assigned.]
2404	    Subject: Request for XCON-URI Registration
2405	    Person & email address to contact for further information:
2406	         Oscar Novo <oscar novo_at_ericsson.com>
2407	    Specification: RFC XXXX
2408	    Author/Change Controller: IESG
2409	    Comments:
2410	        Identifies the Conference

2412	9.4.  Conference User Identifier Registration

2414	   The IANA is requested to register the following URI scheme
2415	    under the Permanent URI Schemes register.

2417	    XCON-USERID = "xcon-userid" ":" conf-user-id  [ RFC xxxx ]

2419	    conf-user-id = 1*(unreserved)

2421	   unreserved is defined in RFC3986[RFC3986]

2423	   [Note to the RFC Editor: replace xxxx with the number this RFC gets
2424	   assigned.]

2426	    Subject: Request for XCON-USERID Registration
2427	    Person & email address to contact for further information:
2428	         Oscar Novo <oscar novo_at_ericsson.com>
2429	    Specification: RFC XXXX
2430	    Author/Change Controller: IESG
2431	    Comments:
2432	        Identifies the User in the conference

2434	10.  Acknowledgements

2436	   This document is really a distillation of many ideas discussed over a
2437	   long period of time.  These ideas were contributed by many different
2438	   drafts in the XCON working group and the SIPPING working group.  We
2439	   would like to thank Orit Levin, Roni Even, Adam Roach, Mary Barnes,
2440	   Chris Boulton, Umesh Chandra, Hisham Khartabil, Petri Koskelainen,
2441	   Aki Niemi, Rohan Mahy, Jonathan Lennox, and Henning Schulzrinne for
2442	   their comments.  Also, we would like to thank Mary Barnes, and Chris
2443	   Boulton for letting us use the conference and user identifier
2444	   information of their xcon drafts.  Last but not least, we would like
2445	   to express our gratitude to all those reviewers for their invaluable
2446	   contribution: Simon Pietro Romano, Lorenzo Miniero, Tobia Castaldi,
2447	   Miguel Garcia, Mary Barnes, Srivatsa Srinivasan, Avshalom Houri,
2448	   Pierre Tane, and Ben Campbell.

2450	11.  References

2452	11.1.  Normative References

2454	   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
2455	              Requirement Levels", BCP 14, RFC 2119, March 1997.

2457	   [RFC2445]  Dawson, F. and Stenerson, D., "Internet Calendaring and
2458	              Scheduling Core Object Specification (iCalendar)",
2459	              RFC 2445, November 1998.

2461	   [RFC4575]  Rosenberg, J., Schulzrinne, H., and O. Levin, "A Session
2462	              Initiation Protocol (SIP) Event Package for Conference
2463	              State", RFC 4575, August 2006.

2465	   [RFC4582]  Camarillo, G., Ott, J., and K. Drage, "The Binary Floor
2466	              Control Protocol (BFCP)", RFC 4582, November 2006.

2468	   [RFC4583]  Camarillo, G., "Session Description Protocol (SDP) Format
2469	              for Binary Floor Control Protocol (BFCP) Streams",
2470	              RFC 4583, November 2006.

2472	   [RFC5239]  Barnes, M., Boulton, C., and O. Levin, "A Framework for
2473	              Centralized Conferencing", RFC 5239, June 2008.

2475	11.2.  Informative References

2477	   [IANA]     "IANA registry for RTP Payload Types"
2478	              "http://www.iana.org/assignments/rtp-parameters".

2480	   [RELAX]    "RELAX NG Home Page" "http://relaxng.org/".

2482	   [RFC3264]  Rosenberg, J. and H. Schulzrinne, "An Offer/Answer Model
2483	              with Session Description Protocol (SDP)", RFC 3264,
2484	              June 2002.

2486	   [RFC3265]  Roach, A., "Session Initiation Protocol (SIP)-Specific
2487	              Event Notification", RFC 3265, June 2002.

2489	   [RFC3986]  Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
2490	              Resource Identifier (URI): Generic Syntax", STD 66,
2491	              RFC 3986, January 2005.

2493	   [RFC4353]  Rosenberg, J., "A Framework for Conferencing with the
2494	              Session Initiation Protocol (SIP)", RFC 4353,
2495	              February 2006.

2497	   [RFC4855]  Casner, S., "Media Type Registration of RTP Payload
2498	              Formats", RFC 4855, February 2007.

2500	   [RFC5018]  Camarillo, G., "Connection Establishment in the Binary
2501	              Floor Control Protocol (BFCP)", RFC 5018, September 2007.

2503	   [W3C.REC-xml-20001006]
2504	              Sperberg-McQueen, C., Maler, E., Paoli, J., and T. Bray,
2505	              "Extensible Markup Language (XML) 1.0 (Second Edition)",
2506	              World Wide Web Consortium FirstEdition REC-xml-20001006,
2507	              October 2000,
2508	              <http://www.w3.org/TR/2000/REC-xml-20001006>.

2510	Appendix A.  Non-Normative RELAX NG Schema in XML Syntax

2512	 <?xml version="1.0" encoding="UTF-8" ?>
2513	    <grammar
2514	           ns="urn:ietf:params:xml:ns:conference-info"
2515	           xmlns="http://relaxng.org/ns/structure/1.0"
2516	           xmlns:xcon="urn:ietf:params:xml:ns:xcon-conference-info"
2517	           datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
2518	           <start>
2519	            <element name="conference-info">
2520	             <ref name="conference-type"/>
2521	            </element>
2522	           </start>
2523	           <!--
2524	               CONFERENCE TYPE
2525	           -->
2526	           <define name="conference-type">
2527	            <interleave>
2528	            <attribute name="entity">
2529	             <text/>
2530	            </attribute>
2531	            <ref name="anyAttribute"/>
2532	            <optional>
2533	             <ref name="conference-description-type"/>
2534	            </optional>
2535	            <optional>
2536	             <element name="host-info">
2537	              <ref name="host-type"/>
2538	             </element>
2539	            </optional>
2540	            <optional>
2541	             <element name="conference-state">
2542	              <ref name="conference-state-type"/>
2543	             </element>
2544	            </optional>
2545	            <optional>
2546	             <element name="users">
2547	              <ref name="users-type"/>
2548	             </element>
2549	            </optional>
2550	            <optional>
2551	             <element name="sidebars-by-ref">
2552	              <ref name="uris-type"/>
2553	             </element>
2554	            </optional>
2555	            <optional>
2556	             <element name="sidebars-by-val">
2557	              <ref name="sidebars-by-val-type"/>
2558	             </element>
2559	            </optional>
2560	            <optional>
2561	             <element name="xcon:floor-information">
2562	              <ref name="floor-information-type"/>
2563	             </element>
2564	            </optional>
2565	            <zeroOrMore>
2566	             <ref name="anyElement"/>
2567	            </zeroOrMore>
2568	            </interleave>
2569	           </define>
2570	           <!--
2571	               CONFERENCE DESCRIPTION TYPE
2572	           -->
2573	           <define name="conference-description-type">
2574	            <element name="conference-description">
2575	             <interleave>
2576	             <optional>
2577	              <attribute name="xml:lang">
2578	               <data type="language"/>
2579	              </attribute>
2580	             </optional>
2581	             <ref name="anyAttribute"/>
2582	             <optional>
2583	              <element name="display-text">
2584	               <text/>
2585	              </element>
2586	             </optional>
2587	             <optional>
2588	              <element name="subject">
2589	               <text/>
2590	              </element>
2591	             </optional>
2592	             <optional>
2593	              <element name="free-text">
2594	               <text/>
2595	              </element>
2596	             </optional>
2597	             <optional>
2598	              <element name="keywords">
2599	               <list>
2600	                <zeroOrMore>
2601	                 <data type="string"/>
2602	                </zeroOrMore>
2603	               </list>
2604	              </element>
2605	             </optional>
2606	             <optional>
2607	              <element name="conf-uris">
2608	               <ref name="uris-type"/>
2609	              </element>
2610	             </optional>
2611	             <optional>
2612	              <element name="service-uris">
2613	                 <ref name="uris-type"/>
2614	              </element>
2615	             </optional>
2616	             <optional>
2617	              <element name="maximum-user-count">
2618	               <data type="int"/>
2619	              </element>
2620	             </optional>
2621	             <optional>
2622	              <element name="available-media">
2623	               <ref name="conference-media-type"/>
2624	              </element>
2625	             </optional>
2626	             <optional>
2627	              <element name="xcon:language">
2628	               <data type="language"/>
2629	              </element>
2630	             </optional>
2631	             <optional>
2632	              <element name="xcon:allow-sidebars">
2633	               <data type="boolean"/>
2634	              </element>
2635	             </optional>
2636	             <optional>
2637	             <element name="xcon:cloning-parent">
2638	              <data type="unsignedLong"/>
2639	             </element>
2640	             </optional>
2641	             <optional>
2642	             <element name="xcon:sidebar-parent">
2643	              <data type="unsignedLong"/>
2644	             </element>
2645	             </optional>
2646	             <optional>
2647	              <element name="xcon:conference-time">
2648	               <ref name="conferencetime-type"/>
2649	              </element>
2650	             </optional>
2651	             <zeroOrMore>
2652	              <ref name="anyElement"/>
2653	             </zeroOrMore>
2654	             </interleave>
2655	            </element>
2656	           </define>
2657	           <!--
2658	               HOST TYPE
2659	           -->
2660	           <define name="host-type">
2661	            <interleave>
2662	            <optional>
2663	             <element name="display-text">
2664	              <text/>
2665	             </element>
2666	            </optional>
2667	            <optional>
2668	             <element name="web-page">
2669	              <data type="anyURI"/>
2670	             </element>
2671	            </optional>
2672	            <optional>
2673	             <element name="uris">
2674	              <ref name="uris-type"/>
2675	             </element>
2676	            </optional>
2677	            <zeroOrMore>
2678	             <ref name="anyElement"/>
2679	            </zeroOrMore>
2680	            <ref name="anyAttribute"/>
2681	            </interleave>
2682	           </define>
2683	           <!--
2684	               CONFERENCE STATE TYPE
2685	           -->
2686	           <define name="conference-state-type">
2687	            <interleave>
2688	            <ref name="anyAttribute"/>
2689	            <optional>
2690	             <element name="user-count">
2691	              <data type="unsignedInt"/>
2692	             </element>
2693	            </optional>
2694	            <optional>
2695	             <element name="active">
2696	              <data type="boolean"/>
2697	             </element>
2698	            </optional>
2699	            <optional>
2700	             <element name="locked">
2701	              <data type="boolean"/>
2702	             </element>
2703	            </optional>
2704	            <optional>
2705	             <element name="xcon:allow-conference-event-subscription">
2706	              <data type="boolean"/>
2707	             </element>
2708	            </optional>
2709	            <zeroOrMore>
2710	             <ref name="anyElement"/>
2711	            </zeroOrMore>
2712	            </interleave>
2713	           </define>
2714	           <!--
2715	               CONFERENCE MEDIA TYPE
2716	           -->
2717	           <define name="conference-media-type">
2718	            <interleave>
2719	            <ref name="anyAttribute"/>
2720	            <zeroOrMore>
2721	             <element name="entry">
2722	              <ref name="conference-medium-type"/>
2723	             </element>
2724	            </zeroOrMore>
2725	            <zeroOrMore>
2726	             <ref name="anyElement"/>
2727	            </zeroOrMore>
2728	            </interleave>
2729	           </define>
2730	           <!--
2731	               CONFERENCE MEDIUM TYPE

2733	           -->
2734	           <define name="conference-medium-type">
2735	            <interleave>
2736	            <attribute name="label">
2737	             <text/>
2738	            </attribute>
2739	            <ref name="anyAttribute"/>
2740	            <optional>
2741	             <element name="display-text">
2742	              <text/>
2743	             </element>
2744	            </optional>
2745	            <optional>
2746	             <element name="type">
2747	              <text/>
2748	             </element>
2749	            </optional>
2750	            <optional>
2751	             <element name="status">
2752	              <ref name="media-status-type"/>
2753	             </element>
2754	            </optional>
2755	            <optional>
2756	             <element name="xcon:mixing-mode">
2757	              <ref name="mixing-mode-type"/>
2758	             </element>
2759	            </optional>
2760	            <optional>
2761	             <element name="xcon:codecs">
2762	              <ref name="codecs-type"/>
2763	             </element>
2764	            </optional>
2765	            <optional>
2766	             <element name="xcon:controls">
2767	              <ref name="control-type"/>
2768	             </element>
2769	            </optional>
2770	            <zeroOrMore>
2771	             <ref name="anyElement"/>
2772	            </zeroOrMore>
2773	            </interleave>
2774	           </define>
2775	           <!--
2776	               URIs TYPE
2777	           -->
2778	           <define name="uris-type">
2779	            <interleave>
2780	            <ref name="anyAttribute"/>
2781	            <zeroOrMore>
2782	             <element name="entry">
2783	              <ref name="uri-type"/>
2784	             </element>
2785	            </zeroOrMore>
2786	            <zeroOrMore>
2787	             <ref name="anyElement"/>
2788	            </zeroOrMore>
2789	            </interleave>
2790	           </define>
2791	           <!--
2792	               URI TYPE
2793	           -->
2794	           <define name="uri-type">
2795	            <interleave>
2796	            <element name="uri">
2797	             <data type="anyURI"/>
2798	            </element>
2799	            <optional>
2800	             <element name="display-text">
2801	              <text/>
2802	             </element>
2803	            </optional>
2804	            <optional>
2805	             <element name="purpose">
2806	              <text/>
2807	             </element>
2808	            </optional>
2809	            <optional>
2810	             <element name="modified">
2811	              <ref name="execution-type"/>
2812	             </element>
2813	            </optional>
2814	            <optional>
2815	             <element name="xcon:conference-password">
2816	              <text/>
2817	             </element>
2818	            </optional>
2819	            <zeroOrMore>
2820	             <ref name="anyElement"/>
2821	            </zeroOrMore>
2822	            <ref name="anyAttribute"/>
2823	           </interleave>

2825	           </define>
2826	           <!--
2827	               USERS TYPE
2828	           -->
2829	           <define name="users-type">
2830	            <interleave>
2831	            <ref name="anyAttribute"/>
2832	            <zeroOrMore>
2833	             <element name="user">
2834	              <ref name="user-type"/>
2835	             </element>
2836	            </zeroOrMore>
2837	            <optional>
2838	             <element name="xcon:join-handling">
2839	              <ref name="join-handling-type"/>
2840	             </element>
2841	            </optional>
2842	            <optional>
2843	             <element name="xcon:user-admission-policy">
2844	              <ref name="user-admission-policy-type"/>
2845	             </element>
2846	            </optional>
2847	            <optional>
2848	             <element name="xcon:allowed-users-list">
2849	              <ref name="allowed-users-list-type"/>
2850	             </element>
2851	            </optional>
2852	            <optional>
2853	             <element name="xcon:deny-users-list">
2854	              <ref name="deny-user-list-type"/>
2855	             </element>
2856	            </optional>
2857	            <zeroOrMore>
2858	             <ref name="anyElement"/>
2859	            </zeroOrMore>
2860	            </interleave>
2861	           </define>
2862	           <!--
2863	               USER TYPE
2864	           -->
2865	           <define name="user-type">
2866	            <interleave>
2867	            <attribute name="entity">
2868	             <data type="anyURI"/>
2869	            </attribute>
2870	            <ref name="anyAttribute"/>
2871	            <optional>
2872	             <element name="display-text">
2873	              <text/>
2874	             </element>
2875	            </optional>
2876	            <optional>
2877	             <element name="associated-aors">
2878	               <ref name="uris-type"/>
2879	             </element>
2880	            </optional>
2881	            <optional>
2882	             <element name="roles">
2883	              <oneOrMore>
2884	               <element name="entry">
2885	                <ref name="single-role-type"/>
2886	               </element>
2887	              </oneOrMore>
2888	             </element>
2889	            </optional>
2890	            <optional>
2891	             <element name="languages">
2892	              <list>
2893	               <data type="language"/>
2894	              </list>
2895	             </element>
2896	            </optional>
2897	            <optional>
2898	             <element name="cascaded-focus">
2899	              <data type="anyURI"/>
2900	             </element>
2901	            </optional>
2902	            <zeroOrMore>
2903	             <element name="endpoint">
2904	              <ref name="endpoint-type"/>
2905	             </element>
2906	            </zeroOrMore>
2907	            <optional>
2908	             <element name="xcon:provide-anonymity">
2909	              <ref name="provide-anonymity-type"/>
2910	             </element>
2911	            </optional>
2912	           <optional>
2913	             <element name="xcon:allow-refer-users-dynamically">
2914	              <data type="boolean"/>
2915	             </element>
2916	            </optional>
2917	            <optional>
2918	             <element name="xcon:allow-invite-users-dynamically">
2919	              <data type="boolean"/>
2920	             </element>
2921	            </optional>
2922	            <optional>
2923	             <element name="xcon:allow-remove-users-dynamically">
2924	              <data type="boolean"/>

2926	             </element>
2927	            </optional>
2928	             <zeroOrMore>
2929	             <ref name="anyElement"/>
2930	            </zeroOrMore>
2931	            </interleave>
2932	           </define>
2933	           <!--
2934	               ENDPOINT TYPE
2935	           -->
2936	           <define name="endpoint-type">
2937	            <interleave>
2938	            <attribute name="entity">
2939	             <text/>
2940	            </attribute>
2941	            <ref name="anyAttribute"/>
2942	            <optional>
2943	             <element name="display-text">
2944	              <text/>
2945	             </element>
2946	            </optional>
2947	            <optional>
2948	             <element name="referred">
2949	               <ref name="execution-type"/>
2950	             </element>
2951	            </optional>
2952	            <optional>
2953	             <element name="status">
2954	              <ref name="endpoint-status-type"/>
2955	             </element>
2956	            </optional>
2957	            <optional>
2958	             <element name="joining-method">
2959	              <ref name="joining-type"/>
2960	             </element>
2961	            </optional>
2962	            <optional>
2963	             <element name="joining-info">
2964	               <ref name="execution-type"/>
2965	             </element>
2966	            </optional>
2967	            <optional>
2968	             <element name="disconnection-method">
2969	              <ref name="disconnection-type"/>
2970	             </element>
2971	            </optional>
2972	            <optional>
2973	             <element name="disconnection-info">
2974	              <ref name="execution-type"/>
2975	             </element>
2976	            </optional>
2977	            <zeroOrMore>
2978	             <element name="media">
2979	              <ref name="media-type"/>
2980	             </element>
2981	            </zeroOrMore>
2982	            <optional>
2983	             <element name="call-info">
2984	              <ref name="call-type"/>
2985	             </element>
2986	            </optional>
2987	            <zeroOrMore>
2988	             <element name="xcon:floor">
2989	              <attribute name="id">
2990	               <text/>
2991	              </attribute>
2992	              <ref name="anyAttribute"/>
2993	              <data type="boolean"/>
2994	             </element>
2995	            </zeroOrMore>
2996	            <zeroOrMore>
2997	             <ref name="anyElement"/>
2998	            </zeroOrMore>
2999	            </interleave>
3000	           </define>
3001	           <!--
3002	               ENDPOINT STATUS TYPE
3003	           -->
3004	           <define name="endpoint-status-type">
3005	            <choice>
3006	             <value>pending</value>
3007	             <value>dialing-out</value>
3008	             <value>dialing-in</value>
3009	             <value>alerting</value>
3010	             <value>on-hold</value>
3011	             <value>connected</value>
3012	             <value>muted-via-focus</value>
3013	             <value>disconnecting</value>
3014	             <value>disconnected</value>
3015	             <ref name="free-text-extension"/>
3016	            </choice>
3017	           </define>
3018	           <!--
3019	               JOINING TYPE
3020	           -->
3021	           <define name="joining-type">
3022	            <choice>
3023	             <value>dialed-in</value>
3024	             <value>dialed-out</value>
3025	             <value>focus-owner</value>
3026	             <ref name="free-text-extension"/>
3027	            </choice>
3028	           </define>
3029	           <!--
3030	               DISCONNECTION TYPE
3031	           -->
3032	           <define name="disconnection-type">
3033	            <choice>
3034	             <value>departed</value>
3035	             <value>booted</value>
3036	             <value>failed</value>
3037	             <value>busy</value>
3038	             <ref name="free-text-extension"/>
3039	            </choice>
3040	           </define>
3041	           <!--
3042	               EXECUTION TYPE
3043	           -->
3044	           <define name="execution-type">
3045	            <interleave>
3046	            <optional>
3047	             <element name="when">
3048	              <data type="dateTime"/>
3049	             </element>
3050	            </optional>
3051	            <optional>
3052	             <element name="reason">
3053	              <text/>
3054	             </element>
3055	            </optional>
3056	            <optional>
3057	             <element name="by">
3058	              <data type="anyURI"/>
3059	             </element>
3060	            </optional>
3061	            <ref name="anyAttribute"/>
3062	            </interleave>
3063	           </define>
3064	           <!--
3065	               CALL TYPE
3066	           -->
3067	           <define name="call-type">
3068	            <interleave>
3069	             <element name="sip">
3070	              <ref name="sip-dialog-id-type"/>
3071	             </element>
3072	             <zeroOrMore>
3073	              <ref name="anyElement"/>
3074	             </zeroOrMore>
3075	             <ref name="anyAttribute"/>
3076	            </interleave>
3077	           </define>
3078	           <!--
3079	               SIP DIALOG ID TYPE
3080	           -->
3081	           <define name="sip-dialog-id-type">
3082	            <interleave>
3083	            <optional>
3084	            <element name="display-text">
3085	             <text/>
3086	            </element>
3087	            </optional>
3088	            <element name="call-id">
3089	             <text/>
3090	            </element>
3091	            <element name="from-tag">
3092	             <text/>
3093	            </element>
3094	            <element name="to-tag">
3095	             <text/>
3096	            </element>
3097	            <zeroOrMore>
3098	             <ref name="anyElement"/>
3099	            </zeroOrMore>
3100	            <ref name="anyAttribute"/>
3101	            </interleave>
3102	           </define>
3103	           <!--
3104	               MEDIA TYPE
3105	           -->
3106	           <define name="media-type">
3107	            <interleave>
3108	            <attribute name="id">
3109	             <data type="int"/>
3110	            </attribute>
3111	            <ref name="anyAttribute"/>
3112	            <optional>
3113	             <element name="display-text">
3114	              <text/>
3115	             </element>
3116	            </optional>
3117	            <optional>
3118	             <element name="type">
3119	              <text/>
3120	             </element>
3121	            </optional>
3122	            <optional>
3123	             <element name="label">
3124	              <text/>
3125	             </element>
3126	            </optional>
3127	            <optional>
3128	             <element name="src-id">
3129	              <text/>
3130	             </element>
3131	            </optional>
3132	            <optional>
3133	             <element name="status">
3134	              <ref name="media-status-type"/>
3135	             </element>
3136	            </optional>
3137	            <optional>
3138	             <element name="xcon:to-mixer">
3139	              <ref name="mixer-type"/>
3140	             </element>
3141	            </optional>
3142	            <optional>
3143	             <element name="xcon:from-mixer">
3144	              <ref name="mixer-type"/>
3145	             </element>
3146	            </optional>
3147	            <zeroOrMore>
3148	             <ref name="anyElement"/>
3149	            </zeroOrMore>
3150	            </interleave>
3151	           </define>
3152	           <!--
3153	               MEDIA STATUS TYPE
3154	           -->
3155	           <define name="media-status-type">
3156	            <choice>
3157	             <value>recvonly</value>
3158	             <value>sendonly</value>
3159	             <value>sendrecv</value>
3160	             <value>inactive</value>
3161	             <ref name="free-text-extension"/>
3162	            </choice>
3163	           </define>
3164	           <!--
3165	               SIDEBARS-BY-VAL TYPE

3167	           -->
3168	           <define name="sidebars-by-val-type">
3169	            <interleave>
3170	            <ref name="anyAttribute"/>
3171	            <zeroOrMore>
3172	             <element name="entry">
3173	              <ref name="conference-type"/>
3174	             </element>
3175	            </zeroOrMore>
3176	            <zeroOrMore>
3177	             <ref name="anyElement"/>
3178	            </zeroOrMore>
3179	            </interleave>
3180	           </define>
3181	           <!--
3182	               CONFERENCE TIME
3183	           -->
3184	           <define name="conferencetime-type">
3185	            <interleave>
3186	            <ref name="anyAttribute"/>
3187	            <zeroOrMore>
3188	             <element name="xcon:entry">
3189	              <element name="xcon:base">
3190	               <text/>
3191	              </element>
3192	              <optional>
3193	               <element name="xcon:mixing-start-offset">
3194	                 <ref name="time-type"/>
3195	                 <attribute name="required-participant">
3196	                  <ref name="single-role-type"/>
3197	                 </attribute>
3198	                <ref name="anyAttribute"/>
3199	               </element>
3200	              </optional>
3201	              <optional>
3202	               <element name="xcon:mixing-end-offset">
3203	                <ref name="time-type"/>
3204	                <attribute name="required-participant">
3205	                 <ref name="single-role-type"/>
3206	                </attribute>
3207	                <ref name="anyAttribute"/>
3208	               </element>
3209	              </optional>
3210	              <optional>
3211	               <element name="xcon:can-join-after-offset">
3212	                <ref name="time-type"/>
3213	               </element>
3214	              </optional>
3215	              <optional>
3216	               <element name="xcon:must-join-before-offset">
3217	                <ref name="time-type"/>
3218	               </element>
3219	              </optional>
3220	              <optional>
3221	               <element name="xcon:request-user">
3222	                <ref name="time-type"/>
3223	               </element>
3224	              </optional>
3225	              <optional>
3226	               <element name="xcon:notify-end-of-conference">
3227	                <data type="int"/>
3228	               </element>
3229	              </optional>
3230	              <optional>
3231	               <element name="xcon:allowed-extend-mixing-end-offset">
3232	                <data type="boolean"/>
3233	               </element>
3234	              </optional>
3235	              <zeroOrMore>
3236	               <ref name="anyElement"/>
3237	              </zeroOrMore>
3238	             </element>
3239	            </zeroOrMore>
3240	            </interleave>
3241	           </define>
3242	           <!--
3243	               TIME TYPE
3244	           -->
3245	           <define name="time-type">
3246	             <data type="dateTime">
3247	               <param name="pattern">.+T.+Z.*</param>
3248	             </data>
3249	           </define>
3250	           <!--
3251	               SINGLE ROLE TYPE
3252	           -->
3253	           <define name="single-role-type">
3254	            <choice>
3255	             <value type="string">none</value>
3256	             <value type="string">administrator</value>
3257	             <value type="string">moderator</value>
3258	             <value type="string">user</value>
3259	             <value type="string">observer</value>
3260	             <value type="string">participant</value>
3261	             <ref name="free-text-extension"/>
3262	            </choice>

3264	           </define>
3265	           <!--
3266	               MIXING MODE TYPE
3267	           -->
3268	           <define name="mixing-mode-type">
3269	            <choice>
3270	             <value type="string">moderator-controlled</value>
3271	             <value type="string">FCFS</value>
3272	             <value type="string">automatic</value>
3273	             <ref name="free-text-extension"/>
3274	            </choice>
3275	           </define>
3276	           <!--
3277	               CODECS TYPE
3278	           -->
3279	           <define name="codecs-type">
3280	            <interleave>
3281	            <attribute name="decision">
3282	             <ref name="decision-type"/>
3283	            </attribute>
3284	            <ref name="anyAttribute"/>
3285	            <zeroOrMore>
3286	             <element name="xcon:codec">
3287	              <ref name="codec-type"/>
3288	             </element>
3289	            </zeroOrMore>
3290	            <zeroOrMore>
3291	             <ref name="anyElement"/>
3292	            </zeroOrMore>
3293	            </interleave>
3294	           </define>
3295	           <!--
3296	               CODEC TYPE
3297	           -->
3298	           <define name="codec-type">
3299	            <interleave>
3300	            <attribute name="name">
3301	             <text/>
3302	            </attribute>
3303	            <attribute name="policy">
3304	             <ref name="policy-type"/>
3305	            </attribute>
3306	            <ref name="anyAttribute"/>
3307	            <optional>
3308	             <element name="xcon:subtype">
3309	              <text/>
3310	             </element>
3311	            </optional>
3312	            <zeroOrMore>
3313	             <ref name="anyElement"/>
3314	            </zeroOrMore>
3315	            </interleave>
3316	           </define>
3317	           <!--
3318	               DECISION TYPE
3319	           -->
3320	           <define name="decision-type">
3321	            <choice>
3322	             <value type="string">automatic</value>
3323	             <value type="string">moderator-controlled</value>
3324	             <ref name="free-text-extension"/>
3325	            </choice>
3326	           </define>
3327	           <!--
3328	               POLICY TYPE
3329	           -->
3330	           <define name="policy-type">
3331	            <choice>
3332	             <value type="string">allowed</value>
3333	             <value type="string">disallowed</value>
3334	             <ref name="free-text-extension"/>
3335	            </choice>
3336	           </define>
3337	           <!--
3338	               CONTROL TYPE
3339	           -->
3340	           <define name="control-type">
3341	            <interleave>
3342	            <ref name="anyAttribute"/>
3343	            <optional>
3344	             <element name="xcon:mute">
3345	              <data type="boolean"/>
3346	             </element>
3347	            </optional>
3348	            <optional>
3349	             <element name="xcon:pause-video">
3350	              <data type="boolean"/>
3351	             </element>
3352	            </optional>
3353	            <optional>
3354	             <element name="xcon:gain">
3355	              <ref name="gain-type"/>
3356	             </element>
3357	            </optional>
3358	            <optional>
3359	             <element name="xcon:video-layout">
3360	              <ref name="video-layout-type"/>
3361	             </element>
3362	            </optional>
3363	            <zeroOrMore>
3364	             <ref name="anyElement"/>
3365	            </zeroOrMore>
3366	            </interleave>
3367	           </define>
3368	           <!--
3369	               GAIN TYPE
3370	           -->
3371	           <define name="gain-type">
3372	             <data type="int">
3373	               <param name="minInclusive">-127</param>
3374	               <param name="maxInclusive">127</param>
3375	             </data>
3376	           </define>
3377	           <!--
3378	               VIDEO LAYOUT TYPE
3379	           -->
3380	           <define name="video-layout-type">
3381	              <choice>
3382	               <value type="string">single-view</value>
3383	               <value type="string">dual-view</value>
3384	               <value type="string">dual-view-crop</value>
3385	               <value type="string">dual-view-2x1</value>
3386	               <value type="string">dual-view-2x1-crop</value>
3387	               <value type="string">quad-view</value>
3388	               <value type="string">multiple-3x3</value>
3389	               <value type="string">multiple-4x4</value>
3390	               <value type="string">multiple-5x1</value>
3391	               <value type="string">automatic</value>
3392	               <ref name="free-text-extension"/>
3393	              </choice>
3394	           </define>
3395	           <!--
3396	               FLOOR INFORMATION TYPE
3397	           -->
3398	           <define name="floor-information-type">
3399	            <interleave>
3400	            <ref name="anyAttribute"/>
3401	            <optional>
3402	             <element name="xcon:conference-ID">
3403	              <data type="unsignedLong"/>
3404	             </element>
3405	            </optional>
3406	            <optional>
3407	             <element name="xcon:allow-floor-events">
3408	              <data type="boolean"/>
3409	             </element>
3410	            </optional>
3411	            <optional>
3412	             <element name="xcon:floor-request-handling">
3413	              <ref name="floor-request-type"/>
3414	             </element>
3415	            </optional>
3416	            <optional>
3417	             <element name="xcon:conference-floor-policy">
3418	              <ref name="conference-floor-policy"/>
3419	             </element>
3420	            </optional>
3421	            <zeroOrMore>
3422	             <ref name="anyElement"/>
3423	            </zeroOrMore>
3424	            </interleave>
3425	           </define>
3426	           <!--
3427	               FLOOR REQUEST TYPE
3428	           -->
3429	           <define name="floor-request-type">
3430	            <choice>
3431	             <value type="string">block</value>
3432	             <value type="string">confirm</value>
3433	             <ref name="free-text-extension"/>
3434	            </choice>
3435	           </define>
3436	           <!--
3437	               CONFERENCE FLOOR POLICY
3438	           -->
3439	           <define name="conference-floor-policy">
3440	            <interleave>
3441	            <ref name="anyAttribute"/>
3442	            <oneOrMore>
3443	             <element name="xcon:floor">
3444	              <interleave>
3445	              <attribute name="id">
3446	               <text/>
3447	              </attribute>
3448	              <ref name="anyAttribute"/>
3449	              <oneOrMore>
3450	               <element name="xcon:media-label">
3451	                <data type="nonNegativeInteger"/>
3452	               </element>
3453	              </oneOrMore>
3454	              <optional>
3455	               <element name="xcon:algorithm">
3456	                <ref name="algorithm-type"/>
3457	               </element>
3458	              </optional>
3459	              <optional>
3460	               <element name="xcon:max-floor-users">
3461	                <data type="nonNegativeInteger"/>
3462	               </element>
3463	              </optional>
3464	              <optional>
3465	               <element name="xcon:moderator-id">
3466	                <data type="nonNegativeInteger"/>
3467	               </element>
3468	              </optional>
3469	              <zeroOrMore>
3470	               <ref name="anyElement"/>
3471	              </zeroOrMore>
3472	              </interleave>
3473	             </element>
3474	            </oneOrMore>
3475	            </interleave>
3476	           </define>
3477	           <!--
3478	               ALGORITHM POLICY
3479	           -->
3480	           <define name="algorithm-type">
3481	            <choice>
3482	             <value type="string">moderator-controlled</value>
3483	             <value type="string">FCFS</value>
3484	             <value type="string">random</value>
3485	             <ref name="free-text-extension"/>
3486	            </choice>
3487	           </define>
3488	           <!--
3489	               USERS ADMISSION POLICY
3490	           -->
3491	           <define name="user-admission-policy-type">
3492	            <choice>
3493	             <value type="string">closedAuthenticated</value>
3494	             <value type="string">openAuthenticated</value>
3495	             <value type="string">anonymous</value>
3496	             <ref name="free-text-extension"/>
3497	            </choice>
3498	           </define>
3499	           <!--
3500	               JOIN HANDLING TYPE
3501	           -->
3502	           <define name="join-handling-type">
3503	            <choice>
3504	             <value type="string">block</value>
3505	             <value type="string">confirm</value>
3506	             <value type="string">allow</value>
3507	             <value type="string">authenticate</value>
3508	             <value type="string">directed-operator</value>
3509	             <ref name="free-text-extension"/>
3510	            </choice>
3511	           </define>
3512	           <!--
3513	               DENY USERLIST
3514	           -->
3515	           <define name="deny-user-list-type">
3516	            <interleave>
3517	            <ref name="anyAttribute"/>
3518	            <zeroOrMore>
3519	             <element name="xcon:target">
3520	              <attribute name="uri">
3521	               <data type="anyURI"/>
3522	              </attribute>
3523	              <ref name="anyAttribute"/>
3524	             </element>
3525	            </zeroOrMore>
3526	            <zeroOrMore>
3527	             <ref name="anyElement"/>
3528	            </zeroOrMore>
3529	            </interleave>
3530	           </define>
3531	           <!--
3532	               ALLOWED USERS LIST TYPE
3533	           -->
3534	           <define name="allowed-users-list-type">
3535	            <interleave>
3536	            <ref name="anyAttribute"/>
3537	            <zeroOrMore>
3538	             <element name="xcon:target">
3539	              <ref name="target-type"/>
3540	             </element>
3541	            </zeroOrMore>
3542	            <optional>
3543	             <element name="xcon:persistent-list">
3544	              <ref name="persistent-list-type"/>
3545	             </element>
3546	            </optional>
3547	            <zeroOrMore>
3548	             <ref name="anyElement"/>
3549	            </zeroOrMore>
3550	            </interleave>
3551	           </define>
3552	           <!--
3553	               PERSISTENT LIST TYPE
3554	           -->
3555	           <define name="persistent-list-type">
3556	            <interleave>
3557	              <zeroOrMore>
3558	               <element name="xcon:user">
3559	                <interleave>
3560	                <attribute name="name">
3561	                 <text/>
3562	                </attribute>
3563	                <attribute name="nickname">
3564	                 <text/>
3565	                </attribute>
3566	                <attribute name="id">
3567	                 <text/>
3568	                </attribute>
3569	                <ref name="anyAttribute"/>
3570	                <zeroOrMore>
3571	                 <element name="xcon:e-mail">
3572	                  <text/>
3573	                 </element>
3574	                </zeroOrMore>
3575	                <zeroOrMore>
3576	                 <ref name="anyElement"/>
3577	                </zeroOrMore>
3578	                </interleave>
3579	               </element>
3580	             </zeroOrMore>
3581	             <zeroOrMore>
3582	              <ref name="anyElement"/>
3583	             </zeroOrMore>
3584	            </interleave>
3585	           </define>
3586	           <!--
3587	               TARGET TYPE
3588	           -->
3589	           <define name="target-type">
3590	            <attribute name="uri">
3591	             <data type="anyURI"/>
3592	            </attribute>
3593	            <attribute name="method">
3594	             <ref name="method-type"/>
3595	            </attribute>
3596	            <ref name="anyAttribute"/>
3597	           </define>
3598	           <!--
3599	               METHOD TYPE

3601	           -->
3602	           <define name="method-type">
3603	            <choice>
3604	             <value type="string">dial-in</value>
3605	             <value type="string">dial-out</value>
3606	             <value type="string">refer</value>
3607	             <ref name="free-text-extension"/>
3608	            </choice>
3609	           </define>
3610	           <!--
3611	               ANONYMITY TYPE
3612	           -->
3613	           <define name="provide-anonymity-type">
3614	              <choice>
3615	               <value>private</value>
3616	               <value>semi-private</value>
3617	               <value>hidden</value>
3618	               <ref name="free-text-extension"/>
3619	              </choice>
3620	           </define>
3621	           <!--
3622	               MIXER TYPE
3623	           -->
3624	           <define name="mixer-type">
3625	            <interleave>
3626	            <attribute name="name">
3627	             <ref name="mixer-name-type"/>
3628	            </attribute>
3629	            <ref name="anyAttribute"/>
3630	            <zeroOrMore>
3631	             <element name="xcon:controls">
3632	              <ref name="control-type"/>
3633	             </element>
3634	            </zeroOrMore>
3635	            <zeroOrMore>
3636	             <ref name="anyElement"/>
3637	            </zeroOrMore>
3638	            </interleave>
3639	           </define>
3640	           <!--
3641	               MIXER NAME TYPE
3642	           -->
3643	           <define name="mixer-name-type">
3644	             <choice>
3645	              <value>VideoIn</value>
3646	              <value>VideoOut</value>
3647	              <value>AudioOut</value>
3648	              <value>AudioIn</value>
3649	              <ref name="free-text-extension"/>
3650	             </choice>
3651	           </define>
3652	           <!--
3653	               FREE TEXT EXTENSION
3654	               (re-define this as <notAllowed>,
3655	                if extensions beyond this spec are not used)
3656	           -->
3657	           <define name="free-text-extension">
3658	            <text/>
3659	           </define>

3661	           <!--
3662	            *********************************
3663	            EXTENSIBILITY OF THE SCHEMA
3664	            *********************************
3665	           -->
3666	           <!--
3667	               EXTENSIBILITY ELEMENTS
3668	               (re-define this as <empty/>,
3669	                if extensions beyond this spec are not used)
3670	           -->
3671	           <define name="anyElement">
3672	            <element>
3673	             <anyName>
3674	              <except>
3675	               <name>conference-description</name>
3676	               <name>host-info</name>
3677	               <name>conference-state</name>
3678	               <name>users</name>
3679	               <name>sidebars-by-ref</name>
3680	               <name>sidebars-by-val</name>
3681	               <name>display-text</name>
3682	               <name>subject</name>
3683	               <name>free-text</name>
3684	               <name>keywords</name>
3685	               <name>conf-uris</name>
3686	               <name>service-uris</name>
3687	               <name>maximum-user-count</name>
3688	               <name>available-media</name>
3689	               <name>web-page</name>
3690	               <name>uris</name>
3691	               <name>uri</name>
3692	               <name>user-count</name>
3693	               <name>active</name>
3694	               <name>locked</name>
3695	               <name>entry</name>
3696	               <name>type</name>
3697	               <name>status</name>
3698	               <name>purpose</name>
3699	               <name>modified</name>
3700	               <name>user</name>
3701	               <name>associated-aors</name>
3702	               <name>roles</name>
3703	               <name>languages</name>
3704	               <name>cascaded-focus</name>
3705	               <name>endpoint</name>
3706	               <name>referred</name>
3707	               <name>joining-method</name>
3708	               <name>joining-info</name>
3709	               <name>disconnection-method</name>
3710	               <name>disconnection-info</name>
3711	               <name>media</name>
3712	               <name>call-info</name>
3713	               <name>when</name>
3714	               <name>reason</name>
3715	               <name>by</name>
3716	               <name>sip</name>
3717	               <name>call-id</name>
3718	               <name>from-tag</name>
3719	               <name>to-tag</name>
3720	               <name>label</name>
3721	               <name>src-id</name>
3722	               <name>xcon:conference-password</name>
3723	               <name>xcon:mixing-mode</name>
3724	               <name>xcon:codecs</name>
3725	               <name>xcon:controls</name>
3726	               <name>xcon:language</name>
3727	               <name>xcon:allow-sidebars</name>
3728	               <name>xcon:cloning-parent</name>
3729	               <name>xcon:sidebar-parent</name>
3730	               <name>xcon:allow-conference-event-subscription</name>
3731	               <name>xcon:to-mixer</name>
3732	               <name>xcon:provide-anonymity</name>
3733	               <name>xcon:allow-refer-users-dynamically</name>
3734	               <name>xcon:allow-invite-users-dynamically</name>
3735	               <name>xcon:allow-remove-users-dynamically</name>
3736	               <name>xcon:from-mixer</name>
3737	               <name>xcon:join-handling</name>
3738	               <name>xcon:user-admission-policy</name>
3739	               <name>xcon:allowed-users-list</name>
3740	               <name>xcon:deny-users-list</name>
3741	               <name>xcon:floor-information</name>
3742	               <name>xcon:conference-time</name>
3743	               <name>xcon:provide-anonymity</name>
3744	               <name>xcon:floor</name>
3745	               <name>xcon:entry</name>
3746	               <name>xcon:mixing-start-offset</name>
3747	               <name>xcon:mixing-end-offset</name>
3748	               <name>xcon:can-join-after-offset</name>
3749	               <name>xcon:must-join-before-offset</name>
3750	               <name>xcon:request-user</name>
3751	               <name>xcon:notify-end-of-conference</name>
3752	               <name>xcon:allowed-extend-mixing-end-offset</name>
3753	               <name>xcon:codec</name>
3754	               <name>xcon:subtype</name>
3755	               <name>xcon:mute</name>
3756	               <name>xcon:pause-video</name>
3757	               <name>xcon:gain</name>
3758	               <name>xcon:video-layout</name>
3759	               <name>xcon:conference-ID</name>
3760	               <name>xcon:allow-floor-events</name>
3761	               <name>xcon:floor-request-handling</name>
3762	               <name>xcon:conference-floor-policy</name>
3763	               <name>xcon:media-label</name>
3764	               <name>xcon:algorithm</name>
3765	               <name>xcon:max-floor-users</name>
3766	               <name>xcon:moderator-id</name>
3767	               <name>xcon:target</name>
3768	               <name>xcon:persistent-list</name>
3769	               <name>xcon:e-mail</name>
3770	               <name>xcon:user</name>
3771	              </except>
3772	             </anyName>
3773	             <ref name="anyExtension"/>
3774	            </element>
3775	           </define>

3777	           <define name="anyExtension">
3778	            <zeroOrMore>
3779	             <choice>
3780	              <attribute>
3781	               <anyName/>
3782	              </attribute>
3783	              <ref name="any"/>
3784	             </choice>
3785	            </zeroOrMore>
3786	           </define>

3788	           <define name="any">
3789	            <element>
3790	             <anyName/>
3791	             <zeroOrMore>
3792	              <choice>
3793	               <attribute>
3794	                <anyName/>
3795	               </attribute>
3796	               <text/>
3797	               <ref name="any"/>
3798	              </choice>
3799	             </zeroOrMore>
3800	           </element>
3801	           </define>

3803	           <!--
3804	               EXTENSIBILITY ATTRIBUTES
3805	               (re-define this as <empty/>,
3806	                if extensions beyond this spec are not used)
3807	           -->

3809	           <define name="anyAttribute">
3810	            <zeroOrMore>
3811	             <attribute>
3812	              <anyName>
3813	               <except>
3814	                <name ns="http://www.w3.org/XML/1998/namespace">lang
3815	                </name>
3816	                <name ns="">entity</name>
3817	                <name ns="">required-participant</name>
3818	                <name ns="">label</name>
3819	                <name ns="">decision</name>
3820	                <name ns="">name</name>
3821	                <name ns="">policy</name>
3822	                <name ns="">uri</name>
3823	                <name ns="">method</name>
3824	                <name ns="">id</name>
3825	                <name ns="">nickname</name>
3826	               </except>
3827	              </anyName>
3828	             </attribute>
3829	            </zeroOrMore>
3830	           </define>
3831	          </grammar>

3833	Appendix B.  Non-Normative W3C XML Schema

3835	   The non-normative W3C XML schema defines extension elements in the
3836	   "urn:ietf:params:xml:ns:xcon-conference-info" namespace.  Note that
3837	   <xs:any> extensions in this schema are stricter than in the normative
3838	   RELAX NG schema [RELAX], and the normative RELAX NG schema [RELAX]
3839	   allows unordered child elements unlike this schema (and the [RFC4575]
3840	   schema).  Also note that this schema allows also otherwise valid
3841	   extension elements to appear in the non-allowed positions.  Likewise
3842	   the cardinalities of these extension elements can not be constrained
3843	   with this schema.

3845	<?xml version="1.0" encoding="UTF-8"?>
3846	  <xs:schema
3847	     xmlns="urn:ietf:params:xml:ns:xcon-conference-info"
3848	     xmlns:info="urn:ietf:params:xml:ns:conference-info"
3849	     xmlns:xs="http://www.w3.org/2001/XMLSchema"
3850	     attributeFormDefault="unqualified" elementFormDefault="qualified"
3851	     targetNamespace="urn:ietf:params:xml:ns:xcon-conference-info">

3853	    <xs:import namespace="urn:ietf:params:xml:ns:conference-info"
3854	      schemaLocation="rfc4575.xsd"/>

3856	    <xs:import namespace="http://www.w3.org/XML/1998/namespace"
3857	      schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>

3859	    <xs:element name="conference-password" type="xs:string"/>
3860	    <xs:element name="mixing-mode" type="mixing-mode-type"/>
3861	    <xs:element name="codecs" type="codecs-type"/>
3862	    <xs:element name="controls" type="controls-type"/>
3863	    <xs:element name="language" type="xs:language"/>
3864	    <xs:element name="allow-sidebars" type="xs:boolean"/>
3865	    <xs:element name="cloning-parent" type="xs:unsignedLong"/>
3866	    <xs:element name="sidebar-parent" type="xs:unsignedLong"/>
3867	    <xs:element name="conference-time" type="conference-time-type"/>
3868	    <xs:element name="allow-conference-event-subscription"
3869	      type="xs:boolean"/>
3870	    <xs:element name="to-mixer" type="mixer-type"/>
3871	    <xs:element name="provide-anonymity"
3872	      type="provide-anonymity-type"/>
3873	    <xs:element name="allow-refer-users-dynamically"
3874	      type="xs:boolean"/>
3875	    <xs:element name="allow-invite-users-dynamically"
3876	      type="xs:boolean"/>
3877	    <xs:element name="allow-remove-users-dynamically"
3878	      type="xs:boolean"/>
3879	    <xs:element name="from-mixer" type="mixer-type"/>
3880	    <xs:element name="join-handling" type="join-handling-type"/>
3881	    <xs:element name="user-admission-policy"
3882	      type="user-admission-policy-type"/>
3883	    <xs:element name="allowed-users-list"
3884	      type="allowed-users-list-type"/>
3885	    <xs:element name="deny-users-list" type="deny-users-list-type"/>
3886	    <xs:element name="floor-information" type="floor-information-type"/>
3887	    <!-- CONFERENCE TIME -->

3889	    <xs:complexType name="conference-time-type">
3890	      <xs:sequence>
3891	        <xs:element name="entry"
3892	          minOccurs="0" maxOccurs="unbounded">
3893	          <xs:complexType>
3894	            <xs:sequence>
3895	              <xs:element name="base"
3896	                type="xs:string" minOccurs="1"/>
3897	              <xs:element name="mixing-start-offset" minOccurs="0">
3898	                <xs:complexType>
3899	                  <xs:simpleContent>
3900	                    <xs:extension base="time-type">
3901	                     <xs:attribute name="required-participant"
3902	                       type="role-type" use="required"/>
3903	                      <xs:anyAttribute namespace="##any"
3904	                        processContents="lax"/>
3905	                    </xs:extension>
3906	                  </xs:simpleContent>
3907	                </xs:complexType>
3908	              </xs:element>
3909	              <xs:element name="mixing-end-offset" minOccurs="0">
3910	                <xs:complexType>
3911	                  <xs:simpleContent>
3912	                    <xs:extension base="time-type">
3913	                      <xs:attribute name="required-participant"
3914	                        type="role-type" use="required"/>
3915	                      <xs:anyAttribute namespace="##any"
3916	                        processContents="lax"/>
3917	                    </xs:extension>
3918	                  </xs:simpleContent>
3919	                </xs:complexType>
3920	              </xs:element>
3921	              <xs:element name="can-join-after-offset" type="time-type"
3922	                minOccurs="0"/>
3923	              <xs:element name="must-join-before-offset"
3924	                type="time-type" minOccurs="0"/>
3925	              <xs:element name="request-user" type="time-type"
3926	                minOccurs="0"/>
3927	              <xs:element name="notify-end-of-conference"
3928	                type="xs:integer" minOccurs="0"/>
3929	              <xs:element name="allowed-extend-mixing-end-offset"
3930	                type="xs:boolean" minOccurs="0"/>
3931	              <xs:any namespace="##other" processContents="lax"
3932	                minOccurs="0" maxOccurs="unbounded"/>
3933	            </xs:sequence>
3934	          </xs:complexType>

3936	        </xs:element>
3937	        <xs:any namespace="##other" processContents="lax"
3938	          minOccurs="0" maxOccurs="unbounded"/>
3939	      </xs:sequence>
3940	      <xs:anyAttribute namespace="##any" processContents="lax"/>
3941	    </xs:complexType>

3943	    <!-- TIME TYPE -->

3945	     <xs:simpleType name="time-type">
3946	      <xs:restriction base="xs:dateTime">
3947	        <xs:pattern value=".+T.+Z.*"/>
3948	       </xs:restriction>
3949	     </xs:simpleType>

3951	    <!-- ROLE-TYPE -->

3953	    <xs:simpleType name="role-type">
3954	     <xs:restriction base="xs:string">
3955	      <xs:pattern value="none"/>
3956	      <xs:pattern value="administrator"/>
3957	      <xs:pattern value="moderator"/>
3958	      <xs:pattern value="user"/>
3959	      <xs:pattern value="observer"/>
3960	      <xs:pattern value="participant"/>
3961	      <xs:pattern value=".+"/>
3962	     </xs:restriction>
3963	    </xs:simpleType>

3965	    <!-- MIXING MODE TYPE -->

3967	    <xs:simpleType name="mixing-mode-type">
3968	      <xs:restriction base="xs:string">
3969	        <xs:pattern value="moderator-controlled"/>
3970	        <xs:pattern value="FCFS"/>
3971	        <xs:pattern value="automatic"/>
3972	        <xs:pattern value=".+"/>
3973	      </xs:restriction>
3974	    </xs:simpleType>

3976	    <!-- CODECS TYPE -->

3978	    <xs:complexType name="codecs-type">
3979	      <xs:sequence>
3980	        <xs:element name="codec" type="codec-type"/>
3981	        <xs:any namespace="##other" processContents="lax"
3982	          minOccurs="0" maxOccurs="unbounded"/>
3983	      </xs:sequence>
3984	      <xs:attribute name="decision"
3985	        type="decision-type" use="required"/>
3986	      <xs:anyAttribute namespace="##any" processContents="lax"/>
3987	    </xs:complexType>

3989	    <!-- CODEC TYPE -->

3991	    <xs:complexType name="codec-type">
3992	      <xs:sequence>
3993	        <xs:element name="subtype" type="xs:string" minOccurs="0"/>
3994	        <xs:any namespace="##other" processContents="lax"
3995	          minOccurs="0" maxOccurs="unbounded"/>
3996	      </xs:sequence>
3997	      <xs:attribute name="name"
3998	        type="xs:string" use="required"/>
3999	      <xs:attribute name="policy"
4000	        type="policy-type" use="required"/>
4001	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4002	    </xs:complexType>

4004	    <!-- DECISION TYPE -->

4006	    <xs:simpleType name="decision-type">
4007	      <xs:restriction base="xs:string">
4008	        <xs:pattern value="automatic"/>
4009	        <xs:pattern value="moderator-controlled"/>
4010	        <xs:pattern value=".+"/>
4011	      </xs:restriction>
4012	    </xs:simpleType>

4014	    <!-- POLICY TYPE -->

4016	     <xs:simpleType name="policy-type">
4017	      <xs:restriction base="xs:string">
4018	        <xs:pattern value="allowed"/>
4019	        <xs:pattern value="disallowed"/>
4020	        <xs:pattern value=".+"/>
4021	      </xs:restriction>
4022	     </xs:simpleType>

4024	    <!-- CONTROL TYPE -->

4026	    <xs:complexType name="controls-type">
4027	      <xs:sequence>
4028	        <xs:element name="mute"
4029	          type="xs:boolean" minOccurs="0"/>
4030	        <xs:element name="pause-video"
4031	          type="xs:boolean" minOccurs="0"/>

4033	        <xs:element name="gain"
4034	          type="gain-type" minOccurs="0"/>
4035	        <xs:element name="video-layout"
4036	          type="video-layout-type" default="single-view" minOccurs="0"/>
4037	        <xs:any namespace="##other" processContents="lax"
4038	          minOccurs="0" maxOccurs="unbounded"/>
4039	      </xs:sequence>
4040	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4041	    </xs:complexType>

4043	    <!-- GAIN TYPE -->

4045	    <xs:simpleType name="gain-type">
4046	      <xs:restriction base="xs:integer">
4047	        <xs:minInclusive value="-127"/>
4048	        <xs:maxInclusive value="127"/>
4049	      </xs:restriction>
4050	    </xs:simpleType>

4052	    <!-- VIDEO LAYOUT TYPE -->

4054	    <xs:simpleType name="video-layout-type">
4055	      <xs:restriction base="xs:string">
4056	        <xs:pattern value="single-view"/>
4057	        <xs:pattern value="dual-view"/>
4058	        <xs:pattern value="dual-view-crop"/>
4059	        <xs:pattern value="dual-view-2x1"/>
4060	        <xs:pattern value="dual-view-2x1-crop"/>
4061	        <xs:pattern value="quad-view"/>
4062	        <xs:pattern value="multiple-3x3"/>
4063	        <xs:pattern value="multiple-4x4"/>
4064	        <xs:pattern value="multiple-5x1"/>
4065	        <xs:pattern value="automatic"/>
4066	        <xs:pattern value=".+"/>
4067	      </xs:restriction>
4068	    </xs:simpleType>

4070	    <!-- FLOOR INFORMATION TYPE -->

4072	    <xs:complexType name="floor-information-type">
4073	      <xs:sequence>
4074	        <xs:element name="conference-ID"
4075	          type="xs:unsignedLong" minOccurs="0"/>
4076	        <xs:element name="allow-floor-events"
4077	          type="xs:boolean" default="false" minOccurs="0"/>
4078	        <xs:element name="floor-request-handling"
4079	          type="floor-request-handling-type" minOccurs="0"/>
4080	        <xs:element name="conference-floor-policy"
4081	          type="conference-floor-policy" minOccurs="0"/>
4082	        <xs:any namespace="##other" processContents="lax"
4083	          minOccurs="0" maxOccurs="unbounded"/>
4084	      </xs:sequence>
4085	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4086	    </xs:complexType>

4088	    <!-- FLOOR REQUEST TYPE -->

4090	    <xs:simpleType name="floor-request-handling-type">
4091	      <xs:restriction base="xs:string">
4092	        <xs:pattern value="block"/>
4093	        <xs:pattern value="confirm"/>
4094	        <xs:pattern value=".+"/>
4095	      </xs:restriction>
4096	    </xs:simpleType>

4098	    <!-- CONFERENCE FLOOR POLICY -->

4100	    <xs:complexType name="conference-floor-policy">
4101	      <xs:sequence>
4102	        <xs:element name="floor" maxOccurs="unbounded">
4103	          <xs:complexType>
4104	            <xs:sequence>
4105	              <xs:element name="media-label"
4106	                type="xs:string" minOccurs="1" maxOccurs="unbounded"/>
4107	              <xs:element name="algorithm"
4108	                type="algorithm-type" minOccurs="0"/>
4109	              <xs:element name="max-floor-users"
4110	                type="xs:nonNegativeInteger" minOccurs="0"/>
4111	              <xs:element name="moderator-id"
4112	                type="xs:nonNegativeInteger" minOccurs="0"/>
4113	                <xs:any namespace="##other" processContents="lax"
4114	                  minOccurs="0" maxOccurs="unbounded"/>
4115	            </xs:sequence>
4116	            <xs:attribute name="id" type="xs:string" use="required"/>
4117	            <xs:anyAttribute namespace="##any" processContents="lax"/>
4118	          </xs:complexType>
4119	        </xs:element>
4120	      </xs:sequence>
4121	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4122	    </xs:complexType>

4124	    <!-- ALGORITHM TYPE -->

4126	    <xs:simpleType name="algorithm-type">
4127	      <xs:restriction base="xs:string">
4128	        <xs:pattern value="moderator-controlled"/>
4129	        <xs:pattern value="FCFS"/>
4130	        <xs:pattern value="random"/>
4131	        <xs:pattern value=".+"/>
4132	      </xs:restriction>
4133	    </xs:simpleType>

4135	    <!-- USER ADMISSION POLICY TYPE -->

4137	    <xs:simpleType name="user-admission-policy-type">
4138	      <xs:restriction base="xs:string">
4139	        <xs:pattern value="closedAuthenticated"/>
4140	        <xs:pattern value="openAuthenticated"/>
4141	        <xs:pattern value="anonymous"/>
4142	        <xs:pattern value=".+"/>
4143	      </xs:restriction>
4144	    </xs:simpleType>

4146	    <!-- JOIN HANDLING TYPE -->

4148	    <xs:simpleType name="join-handling-type">
4149	      <xs:restriction base="xs:string">
4150	        <xs:pattern value="block"/>
4151	        <xs:pattern value="confirm"/>
4152	        <xs:pattern value="allow"/>
4153	        <xs:pattern value="authenticate"/>
4154	        <xs:pattern value="directed-operator"/>
4155	        <xs:pattern value=".+"/>
4156	       </xs:restriction>
4157	    </xs:simpleType>

4159	   <!-- DENY USER LIST TYPE -->

4161	    <xs:complexType name="deny-users-list-type">
4162	      <xs:sequence>
4163	        <xs:element name="target" minOccurs="0" maxOccurs="unbounded">
4164	          <xs:complexType>
4165	            <xs:attribute name="uri" use="required" type="xs:anyURI"/>
4166	            <xs:anyAttribute namespace="##any" processContents="lax"/>
4167	          </xs:complexType>
4168	        </xs:element>
4169	        <xs:any namespace="##other" processContents="lax"
4170	          minOccurs="0" maxOccurs="unbounded"/>
4171	      </xs:sequence>
4172	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4173	    </xs:complexType>

4175	     <!-- ALLOWED USERS LIST TYPE -->

4177	    <xs:complexType name="allowed-users-list-type">
4178	      <xs:sequence>
4179	        <xs:element name="target" type="target-type"
4180	          minOccurs="0" maxOccurs="unbounded">
4181	        </xs:element>
4182	        <xs:element name="persistent-list"
4183	          type="persistent-list-type"
4184	          minOccurs="0"/>
4185	        <xs:any namespace="##other" processContents="lax"
4186	          minOccurs="0" maxOccurs="unbounded"/>
4187	      </xs:sequence>
4188	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4189	    </xs:complexType>

4191	    <!-- PERSISTENT LIST TYPE -->

4193	    <xs:complexType name="persistent-list-type">
4194	      <xs:sequence>
4195	        <xs:element name="user" minOccurs="0" maxOccurs="unbounded">
4196	          <xs:complexType>
4197	            <xs:sequence>
4198	              <xs:element name="email" type="xs:string"
4199	                minOccurs="0" maxOccurs="unbounded"/>
4200	              <xs:any namespace="##other" processContents="lax"
4201	                minOccurs="0" maxOccurs="unbounded"/>
4202	            </xs:sequence>
4203	            <xs:attribute name="name"
4204	              use="required" type="xs:anyURI"/>
4205	            <xs:attribute name="nickname"
4206	              use="required" type="xs:string"/>
4207	            <xs:attribute name="id"
4208	              use="required" type="xs:string"/>
4209	            <xs:anyAttribute namespace="##any" processContents="lax"/>
4210	          </xs:complexType>
4211	        </xs:element>
4212	        <xs:any namespace="##other" processContents="lax"
4213	          minOccurs="0" maxOccurs="unbounded"/>
4214	      </xs:sequence>
4215	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4216	    </xs:complexType>

4218	    <!-- TARGET TYPE -->

4220	    <xs:complexType name="target-type">
4221	      <xs:attribute name="uri" use="required"
4222	        type="xs:anyURI"/>
4223	      <xs:attribute name="method" use="required"
4224	        type="method-type"/>

4226	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4227	    </xs:complexType>

4229	    <!-- METHOD TYPE -->

4231	    <xs:simpleType name="method-type">
4232	      <xs:restriction base="xs:string">
4233	        <xs:pattern value="dial-in"/>
4234	        <xs:pattern value="dial-out"/>
4235	        <xs:pattern value="refer"/>
4236	        <xs:pattern value=".+"/>
4237	      </xs:restriction>
4238	    </xs:simpleType>

4240	    <!-- ANONYMITY TYPE -->

4242	    <xs:simpleType name="provide-anonymity-type">
4243	      <xs:restriction base="xs:string">
4244	        <xs:pattern value="private"/>
4245	        <xs:pattern value="semi-private"/>
4246	        <xs:pattern value="hidden"/>
4247	        <xs:pattern value=".+"/>
4248	      </xs:restriction>
4249	    </xs:simpleType>

4251	    <!-- MIXER TYPE -->

4253	    <xs:complexType name="mixer-type">
4254	      <xs:sequence>
4255	        <xs:element name="controls" type="controls-type"
4256	          minOccurs="0" maxOccurs="unbounded"/>
4257	        <xs:any namespace="##other" processContents="lax"
4258	          minOccurs="0" maxOccurs="unbounded"/>
4259	      </xs:sequence>
4260	      <xs:attribute name="name" type="mixer-name-type"
4261	        use="required"/>
4262	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4263	    </xs:complexType>

4265	    <!-- MIXER NAME TYPE -->

4267	    <xs:simpleType name="mixer-name-type">
4268	      <xs:restriction base="xs:string">
4269	        <xs:pattern value="VideoIn"/>
4270	        <xs:pattern value="VideoOut"/>
4271	        <xs:pattern value="AudioOut"/>
4272	        <xs:pattern value="AudioIn"/>
4273	        <xs:pattern value=".+"/>

4275	      </xs:restriction>
4276	    </xs:simpleType>

4278	  </xs:schema>

4280	Authors' Addresses

4282	   Oscar Novo
4283	   Ericsson
4284	   Hirsalantie 11
4285	   Jorvas  02420
4286	   Finland

4288	   Email: Oscar.Novo@ericsson.com

4290	   Gonzalo Camarillo
4291	   Ericsson
4292	   Hirsalantie 11
4293	   Jorvas  02420
4294	   Finland

4296	   Email: Gonzalo.Camarillo@ericsson.com

4298	   David P. Morgan
4299	   Fidelity Investments
4300	   82 Devonshire St, MZ V3C
4301	   Boston, MA  02109-3614
4302	   USA

4304	   Email: Dave.Morgan@fmr.com

4306	   Jari Urpalainen
4307	   Nokia
4308	   Itamerenkatu 11-13
4309	   Helsinki  00180
4310	   Finland

4312	   Phone: +358 7180 37686
4313	   Email: jari.urpalainen@nokia.com