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2	XCON                                                             O. Novo
3	Internet-Draft                                              G. Camarillo
4	Intended status: Standards Track                                Ericsson
5	Expires: May 14, 2010                                          D. Morgan
6	                                                    Fidelity Investments
7	                                                           J. Urpalainen
8	                                                                   Nokia
9	                                                       November 10, 2009

11	 Conference Information Data Model for Centralized Conferencing (XCON)
12	                draft-ietf-xcon-common-data-model-14.txt

14	Abstract

16	   This document defines an Extensible Markup Language (XML)-based
17	   conference information data model for centralized conferencing
18	   (XCON).  A conference information data model is designed to convey
19	   information about the conference and about participation in the
20	   conference.  The conference information data model defined in this
21	   document constitutes an extension of the data format specified in the
22	   Session Initiation Protocol (SIP) Event Package for Conference State.

24	Status of this Memo

26	   This Internet-Draft is submitted to IETF in full conformance with the
27	   provisions of BCP 78 and BCP 79.

29	   Internet-Drafts are working documents of the Internet Engineering
30	   Task Force (IETF), its areas, and its working groups.  Note that
31	   other groups may also distribute working documents as Internet-
32	   Drafts.

34	   Internet-Drafts are draft documents valid for a maximum of six months
35	   and may be updated, replaced, or obsoleted by other documents at any
36	   time.  It is inappropriate to use Internet-Drafts as reference
37	   material or to cite them other than as "work in progress."

39	   The list of current Internet-Drafts can be accessed at
40	   http://www.ietf.org/ietf/1id-abstracts.txt.

42	   The list of Internet-Draft Shadow Directories can be accessed at
43	   http://www.ietf.org/shadow.html.

45	   This Internet-Draft will expire on May 14, 2010.

47	Copyright Notice
48	   Copyright (c) 2009 IETF Trust and the persons identified as the
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
53	   (http://trustee.ietf.org/license-info) in effect on the date of
54	   publication of this document.  Please review these documents
55	   carefully, as they describe your rights and restrictions with respect
56	   to this document.  Code Components extracted from this document must
57	   include Simplified BSD License text as described in Section 4.e of
58	   the Trust Legal Provisions and are provided without warranty as
59	   described in the BSD License.

61	Table of Contents

63	   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
64	   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  6
65	   3.  Overview . . . . . . . . . . . . . . . . . . . . . . . . . . .  6
66	     3.1.  Data Model Format  . . . . . . . . . . . . . . . . . . . .  6
67	     3.2.  Data Model Namespace . . . . . . . . . . . . . . . . . . .  6
68	     3.3.  The Conference Object Identifier . . . . . . . . . . . . .  7
69	       3.3.1.  Conference Object URI Definition . . . . . . . . . . .  9
70	     3.4.  Data Model Structure . . . . . . . . . . . . . . . . . . .  9
71	   4.  Data Model Definition  . . . . . . . . . . . . . . . . . . . . 10
72	     4.1.  <conference-info>  . . . . . . . . . . . . . . . . . . . . 13
73	     4.2.  <conference-description> . . . . . . . . . . . . . . . . . 14
74	       4.2.1.  <language> . . . . . . . . . . . . . . . . . . . . . . 14
75	       4.2.2.  <display-text> . . . . . . . . . . . . . . . . . . . . 14
76	       4.2.3.  <subject>  . . . . . . . . . . . . . . . . . . . . . . 14
77	       4.2.4.  <free-text>  . . . . . . . . . . . . . . . . . . . . . 14
78	       4.2.5.  <keywords> . . . . . . . . . . . . . . . . . . . . . . 15
79	       4.2.6.  <allow-sidebars> . . . . . . . . . . . . . . . . . . . 15
80	       4.2.7.  <cloning-parent> . . . . . . . . . . . . . . . . . . . 15
81	       4.2.8.  <sidebar-parent> . . . . . . . . . . . . . . . . . . . 15
82	       4.2.9.  <conference-time>  . . . . . . . . . . . . . . . . . . 15
83	       4.2.10. <conf-uris>  . . . . . . . . . . . . . . . . . . . . . 16
84	       4.2.11. <service-uris> . . . . . . . . . . . . . . . . . . . . 17
85	       4.2.12. <maximum-user-count> . . . . . . . . . . . . . . . . . 17
86	       4.2.13. <available-media>  . . . . . . . . . . . . . . . . . . 17
87	     4.3.  <host-info>  . . . . . . . . . . . . . . . . . . . . . . . 19
88	     4.4.  <conference-state> . . . . . . . . . . . . . . . . . . . . 19
89	       4.4.1.  <allow-conference-event-subscription>  . . . . . . . . 19
90	       4.4.2.  <user-count> . . . . . . . . . . . . . . . . . . . . . 20
91	       4.4.3.  <active> . . . . . . . . . . . . . . . . . . . . . . . 20
92	       4.4.4.  <locked> . . . . . . . . . . . . . . . . . . . . . . . 20
93	     4.5.  <floor-information>  . . . . . . . . . . . . . . . . . . . 20
94	       4.5.1.  <conference-ID>  . . . . . . . . . . . . . . . . . . . 20
95	       4.5.2.  <allow-floor-events> . . . . . . . . . . . . . . . . . 20
96	       4.5.3.  <floor-request-handling> . . . . . . . . . . . . . . . 21
97	       4.5.4.  <conference-floor-policy>  . . . . . . . . . . . . . . 21
98	     4.6.  <users>  . . . . . . . . . . . . . . . . . . . . . . . . . 22
99	       4.6.1.  <join-handling>  . . . . . . . . . . . . . . . . . . . 22
100	       4.6.2.  <user-admission-policy>  . . . . . . . . . . . . . . . 23
101	       4.6.3.  <allowed-users-list> . . . . . . . . . . . . . . . . . 23
102	       4.6.4.  <deny-users-list>  . . . . . . . . . . . . . . . . . . 24
103	       4.6.5.  <user> and Its <user> Sub-elements . . . . . . . . . . 24
104	         4.6.5.1.  <display-text> . . . . . . . . . . . . . . . . . . 25
105	         4.6.5.2.  <associated-aors>  . . . . . . . . . . . . . . . . 26
106	         4.6.5.3.  <provide-anonymity>  . . . . . . . . . . . . . . . 26
107	         4.6.5.4.  <roles>  . . . . . . . . . . . . . . . . . . . . . 26
108	         4.6.5.5.  <languages>  . . . . . . . . . . . . . . . . . . . 26
109	         4.6.5.6.  <cascaded-focus> . . . . . . . . . . . . . . . . . 26
110	         4.6.5.7.  <allow-refer-users-dynamically>  . . . . . . . . . 26
111	         4.6.5.8.  <allow-invite-users-dynamically> . . . . . . . . . 27
112	         4.6.5.9.  <allow-remove-users-dynamically> . . . . . . . . . 27
113	         4.6.5.10. <endpoint> . . . . . . . . . . . . . . . . . . . . 27
114	     4.7.  <sidebars-by-ref>  . . . . . . . . . . . . . . . . . . . . 28
115	     4.8.  <sidebars-by-val>  . . . . . . . . . . . . . . . . . . . . 28
116	   5.  RELAX NG Schema  . . . . . . . . . . . . . . . . . . . . . . . 29
117	   6.  XML Schema Extensibility . . . . . . . . . . . . . . . . . . . 39
118	   7.  XML Example  . . . . . . . . . . . . . . . . . . . . . . . . . 40
119	   8.  Security Considerations  . . . . . . . . . . . . . . . . . . . 49
120	     8.1.  Authentication . . . . . . . . . . . . . . . . . . . . . . 49
121	     8.2.  Confidentiality  . . . . . . . . . . . . . . . . . . . . . 50
122	     8.3.  Integrity  . . . . . . . . . . . . . . . . . . . . . . . . 50
123	   9.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 50
124	     9.1.  Relax NG Schema Registration . . . . . . . . . . . . . . . 50
125	     9.2.  XML Namespace Registration . . . . . . . . . . . . . . . . 51
126	     9.3.  Conference Object Identifier Registration  . . . . . . . . 52
127	     9.4.  Conference User Identifier Registration  . . . . . . . . . 53
128	   10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 53
129	   11. References . . . . . . . . . . . . . . . . . . . . . . . . . . 54
130	     11.1. Normative References . . . . . . . . . . . . . . . . . . . 54
131	     11.2. Informative References . . . . . . . . . . . . . . . . . . 54
132	   Appendix A.  Non-Normative RELAX NG Schema in XML Syntax . . . . . 55
133	   Appendix B.  Non-Normative W3C XML Schema  . . . . . . . . . . . . 82
134	   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 92

136	1.  Introduction

138	   There is a core data set of conference information that is utilized
139	   in any conference, independent of the specific conference media.
140	   This core data set called the 'conference information data model' is
141	   defined in this document using an Extensible Markup Language (XML)-
142	   based.  The conference information data model defined in this
143	   document is logically represented by the conference object.

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

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

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

176	      ...............................................................
177	      . Conferencing Server                                         .
178	      .       +---------------------------------------------------+ .
179	      .       |       C o n f e r e n c e   o b j e c t           | .
180	      .     +-+--------------------------------------------------+| .
181	      .     |       C o n f e r e n c e   o b j e c t            || .
182	      .   +-+---------------------------------------------------+|| .
183	      .   |       C o n f e r e n c e   o b j e c t             ||| .
184	      .   | +--------------------------------------------------+||| .
185	      .   | | Conference Information Data Model                |||| .
186	      .   | | +----------------------------------------------+ |||| .
187	      .   | | | Conference description  (times, duration)    | |||| .
188	      .   | | +----------------------------------------------+ |||| .
189	      .   | | +----------------------------------------------+ |||| .
190	      .   | | | Host information                             | |||| .
191	      .   | | +----------------------------------------------+ |||| .
192	      .   | | +----------------------------------------------+ |||| .
193	      .   | | | Conference state                             | |||| .
194	      .   | | +----------------------------------------------+ |||| .
195	      .   | | +----------------------------------------------+ |||| .
196	      .   | | | Floor information                            | |||| .
197	      .   | | +----------------------------------------------+ |||| .
198	      .   | | +----------------------------------------------+ |||| .
199	      .   | | | Membership (users, capacity)                 | |||| .
200	      .   | | +----------------------------------------------+ |||| .
201	      .   | | +----------------------------------------------+ |||| .
202	      .   | | | Sidebars, Etc.                               | |||| .
203	      .   | | +----------------------------------------------+ |||| .
204	      .   | | +----------------------------------------------+ |||| .
205	      .   | | | Etc.                                         | |||| .
206	      .   | | +----------------------------------------------+ |||+ .
207	      .   | +--------------------------------------------------+|+  .
208	      .   +----^------------------^-------------^--------|------+   .
209	      .        |                  |             |        |          .
210	      . +------v-------+ +--------v-----+ +-----v-+ +----v-------+  .
211	      . | Conference   | | Floor        | |       | |            |  .
212	      . | Control      | | Control      | |Foci   | |Notification|  .
213	      . | Server       | | Server       | |       | |Service     |  .
214	      . +-----^--------+ +---^----------+ +-^-----+ +------------+  .
215	      ........|..............|..............|..........|.............
216	              |Conference    |Floor         |Call      |Notification
217	              |Control       |Control       |Signaling |Protocol
218	              |Protocol      |Protocol      |Protocol  |
219	      ........v..............v..............v..........v.............
220	      .     C  o  n  f  e  r  e  n  c  i  n  g     C  l i  e  n  t  .
221	      ...............................................................

223	                 Figure 1: Conference Server Architecture

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

236	2.  Terminology

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

242	   This document uses the terminology defined in the Centralized
243	   Conferencing Framework [RFC5239], the SIPPING conferencing framework
244	   [RFC4353] and the BFCP (Binary Floor Control Protocol) specification
245	   [RFC4582].  Readers of this document should be familiar with the
246	   terminology used in those documents.

248	3.  Overview

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

260	3.1.  Data Model Format

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

267	3.2.  Data Model Namespace

269	   This specification defines a new namespace specification for
270	   identifying the elements defined in the data model.  This namespace
271	   is as follows:

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

275	3.3.  The Conference Object Identifier

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

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

296	                            +--------------------------+
297	                            |       Conference         |
298	                            |         Object           |
299	                            |       Identifier         |
300	                            +--------------------------+
301	                            |  xcon:Ji092i@example.com |
302	                            +------+-------------------+
303	                                        |
304	                                        |
305	                                        |
306	                      +-----------------+---------------+
307	                      |                                 |
308	          +-----------+-----------+          +----------+---------+
309	          |   CSP Conference IDs  |          |BFCP 'Conference ID'|
310	          +-----------------------+          +--------------------+
311	          | h323:i092@example.com |          |        i092        |
312	          | tel:+44(0)2920930033  |          +----------+---------+
313	          | sip:i092@example.com  |                     |
314	          +-----------------------+             +-------+--------+
315	                                                | BFCP 'Floor ID'|
316	                                                +----------------+
317	                                                |      543       |
318	                                                |      236       |
319	                                                +----------------+

321	                    Figure 2: Conference Object Mapping

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

343	   Further elements can be added to the tree representation in Figure 2
344	   to enable a complete representation of a conference instance within a
345	   conferencing system.

347	3.3.1.  Conference Object URI Definition

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

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

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

355	3.4.  Data Model Structure

357	   The information in this data model is structured in the following
358	   manner.  All the information related to a conference is contained in
359	   a <conference-info> element.  The <conference-info> element contains
360	   the following child elements:

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

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

387	4.  Data Model Definition

389	   The following non-normative diagram shows the structure of conference
390	   object documents.  The operator "!" preceding an element indicates
391	   that the element is mandatory in the data model.  The operator "*"
392	   following an element indicates that the element is introduced and
393	   defined in this document.  That is, elements without a "*" have
394	   already been defined in [RFC4575].

396	   !<conference-info>
397	        |
398	        |--!<conference-description>
399	        |     |--<language>*
400	        |     |--<display-text>
401	        |     |--<subject>
402	        |     |--<free-text>
403	        |     |--<keywords>
404	        |     |--<allow-sidebars>*
405	        |     |--<cloning-parent>*
406	        |     |--<sidebar-parent>*
407	        |     |--<conference-time>*
408	        |     |      |--<entry>*
409	        |     |      |    |--<base>*
410	        |     |      |    |--<mixing-start-offset>*
411	        |     |      |    |--<mixing-end-offset>*
412	        |     |      |    |--<can-join-after-offset>*
413	        |     |      |    |--<must-join-before-offset>*
414	        |     |      |    |--<request-user>*
415	        |     |      |    |--<notify-end-of-conference>*
416	        |     |      |    |--<allowed-extend-mixing-end-offset>*
417	        |     |           ...
418	        |     |--<conf-uris>
419	        |     |      |--<entry>
420	        |     |      |    |--<uri>
421	        |     |      |    |--<display-text>
422	        |     |      |    |--<purpose>
423	        |     |      |    |--<conference-password>*
424	        |     |      ...
425	        |     |--<service-uris>
426	        |     |      |--<entry>
427	        |     |      |    |--<uri>
428	        |     |      |    |--<display-text>
429	        |     |      |    |--<purpose>
430	        |     |      ...
431	        |     |--<maximum-user-count>
432	        |     |      ...
433	        |     |--<available-media>
434	        |     |      |--!<entry>
435	        |     |      |     |--<display-text>
436	        |     |      |     |--<type>
437	        |     |      |     |--<status>
438	        |     |      |     |--<mixing-mode>*
439	        |     |      |     |--<codecs>*
440	        |     |      |     |    |--<codec>*
441	        |     |      |     |    |    |--<subtype>*
442	        |     |      |     |    |--<codec>*
443	        |     |      |     |    |    |--<subtype>*
444	        |     |      |     |    ...
445	        |     |      |     |--<controls>*
446	        |     |      |     |    |--<mute>*
447	        |     |      |     |    |--<gain>*
448	        |     |      |     |   ...
449	        |     |      |--<entry>
450	        |     |      |     |--<display-text>
451	        |     |      |     |--<type>
452	        |     |      |     |--<status>
453	        |     |      |     |--<mixing-mode>*
454	        |     |      |     |--<codecs>*
455	        |     |      |     |    |--<codec>*
456	        |     |      |     |    |    |--<subtype>*
457	        |     |      |     |    |--<codec>*
458	        |     |      |     |    |    |--<subtype>*
459	        |     |      |     |    ...
460	        |     |      |     |--<controls>*
461	        |     |      |     |    |--<pause-video>*
462	        |     |      |     |    |--<video-layout>*
463	        |     |      |     |   ...
464	        |     |      ...
465	        |
466	        |--<host-info>
467	        |     |--<display-text>
468	        |     |--<web-page>
469	        |     |--<uris>
470	        |     |     |--<entry>
471	        |     |     |    |--<uri>
472	        |     |     |    |--<display-text>
473	        |           ...
474	        |--<conference-state>
475	        |     |--<allow-conference-event-subscription>*
476	        |     |--<user-count>
477	        |     |--<active>
478	        |     |--<locked>
479	        |
480	        |--<floor-information>*
481	        |     |--<conference-ID>*
482	        |     |--<allow-floor-events>*
483	        |     |--<floor-request-handling>*
484	        |     |--<conference-floor-policy>*
485	        |     |     |--<floor>*
486	        |     |     |    |--!<media-label>*
487	        |     |     |    |--!<algorithm>*
488	        |     |     |    |--<max-floor-users>*
489	        |     |     |    |--<moderator-id>*
490	        |     |     |   ...
491	        |     |     ...
492	        |
493	        |--!<users>
494	        |     |--<join-handling>*
495	        |     |--<user-admission-policy>*
496	        |     |--<allowed-users-list>*
497	        |     |     |--<target>*
498	        |     |     |
499	        |     |     |--<persistent-list>*
500	        |     |     |     |--<user>*
501	        |     |     |     |     |-- <email>*
502	        |     |
503	        |     |--<deny-users-list>*
504	        |     |
505	        |     |--<user>
506	        |     |    |--<display-text>
507	        |     |    |--<associated-aors>
508	        |     |    |--<provide-anonymity>*
509	        |     |    |--<roles>
510	        |     |    |    |
511	        |     |    |   ...
512	        |     |    |--<languages>
513	        |     |    |--<cascaded-focus>
514	        |     |    |--<allow-refer-users-dynamically>*
515	        |     |    |--<allow-invite-users-dynamically>*
516	        |     |    |--<allow-remove-users-dynamically>*
517	        |     |    |--!<endpoint>
518	        |     |    |      |--<display-text>
519	        |     |    |      |--<referred>
520	        |     |    |      |--<status>
521	        |     |    |      |--<joining-method>
522	        |     |    |      |--<joining-info>
523	        |     |    |      |--<disconnection-method>
524	        |     |    |      |--<disconnection-info>
525	        |     |    |      |--<media>
526	        |     |    |      |    |--<type>
527	        |     |    |      |    |--<display-text>
528	        |     |    |      |    |--<label>
529	        |     |    |      |    |--<src-id>
530	        |     |    |      |    |--<status>
531	        |     |    |      |    |--<to-mixer>*
532	        |     |    |      |    |      |--<floor>*
533	        |     |    |      |    |      |--<controls>*
534	        |     |    |      |    |      |      |--<mute>*
535	        |     |    |      |    |      |      |--<gain>*
536	        |     |    |      |    |      |     ...
537	        |     |    |      |    |--<from-mixer>*
538	        |     |    |      |    |      |--<floor>*
539	        |     |    |      |    |      |--<controls>*
540	        |     |    |      |    |      |      |--<pause-video>*
541	        |     |    |      |    |      |     ...
542	        |     |    |      |   ...
543	        |     |    |      |--<call-info>
544	        |     |    |      |    |--<sip>
545	        |     |    |      |    |   |--<display-text>
546	        |     |    |      |    |   |--<call-id>
547	        |     |    |      |    |   |--<from-tag>
548	        |     |    |      |    |   |--<to-tag>
549	        |          ...    ...
550	        |--<sidebars-by-ref>
551	        |     |--<entry>
552	        |     |     |-- <user>
553	        |     |     |-- <display-text>
554	        |     |--<entry>
555	        |     |     |-- <user>
556	        |     |     |-- <display-text>
557	        |     ...
558	        |--<sidebars-by-val>
559	        |     |--<entry>
560	        |     |     |
561	        |     |    ...
562	        |     |--<entry>
563	        |     |     |
564	        |     ...   ...

566	                      Figure 3: Non-normative diagram

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

571	4.1.  <conference-info>

573	   A conference object document begins with the root element tag
574	   <conference-info>, which is defined in [RFC4575].  The <conference-
575	   info> attributes are described in [RFC4575].  Note that the
576	   <conference-info> element does not have the attributes 'state' and
577	   'version' defined in [RFC4575] for this element because these
578	   attributes only apply to notification mechanisms.

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

584	   The <conference-info> element contains the <conference-description>,
585	   <host-info>, <conference-state>, <floor-information>, <users>,
586	   <sidebars-by-ref>, and <sidebars-by-val> child elements.  All these
587	   elements, except <floor-information>, are defined in [RFC4575].  A
588	   conference document MUST at least include the <conference-
589	   description> and <users> child elements.

591	4.2.  <conference-description>

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

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

605	4.2.1.  <language>

607	   The <language> element indicates the predominant language that is
608	   expected to be employed within a conference.  This element is not
609	   enforcing the language of the conference, but only informs the
610	   participants about the desirable language that they should use in the
611	   conference.  Participants are free to switch to other languages if
612	   they like.

614	4.2.2.  <display-text>

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

618	4.2.3.  <subject>

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

622	4.2.4.  <free-text>

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

626	4.2.5.  <keywords>

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

630	4.2.6.  <allow-sidebars>

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

635	4.2.7.  <cloning-parent>

637	   When the <cloning-parent> is present, it indicates that the
638	   conference object is a child of a parent conference.  The <cloning-
639	   parent> element contains the conference object Identifier (XCON-URI)
640	   (different from the main XCON-URI) of the parent.

642	4.2.8.  <sidebar-parent>

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

649	4.2.9.  <conference-time>

651	   The <conference-time> element contains the information related to
652	   conference time and duration of a conference.  The <conference-time>
653	   element contains one or more <entry> elements each defining the time
654	   information specifying a single conference occurrence.

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

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

711	4.2.10.  <conf-uris>

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

722	4.2.11.  <service-uris>

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

729	4.2.12.  <maximum-user-count>

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

736	4.2.13.  <available-media>

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

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

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

846	4.3.  <host-info>

848	   The <host-info> element contains information about the entity hosting
849	   the conference.  This information is set before conference
850	   activation, and is rarely changed during the conference lifetime.
851	   The <host-info> element and its child elements are described in
852	   [RFC4575], section 5.4.  Future extensions to the <host-info> element
853	   may define new values.

855	4.4.  <conference-state>

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

861	4.4.1.  <allow-conference-event-subscription>

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

871	4.4.2.  <user-count>

873	   The <user-count> child element is explained in [RFC4575], section
874	   5.5.1.

876	4.4.3.  <active>

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

880	4.4.4.  <locked>

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

884	4.5.  <floor-information>

886	   The <floor-information> element contains the <conference-ID>, <allow-
887	   floor-events>, <floor-request-handling>, and <conference-floor-
888	   policy> child elements.  Other elements from different namespaces MAY
889	   be present for the purposes of extensibility.  The absence of this
890	   element from an XML document indicates that the conference does not
891	   have a floor.

893	4.5.1.  <conference-ID>

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

903	4.5.2.  <allow-floor-events>

905	   The <allow-floor-events> element represents a boolean action.  If set
906	   to TRUE, the focus is instructed to accept the subscription to floor
907	   control events.  If set to FALSE, the focus is instructed to reject
908	   the subscription.  If this element is undefined, it has a default
909	   value of FALSE, causing the subscription to floor control events to
910	   be rejected.

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

920	4.5.3.  <floor-request-handling>

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

927	   o  "block": This action instructs the focus to deny the floor
928	      request.  This action is the default action taken in the absence
929	      of any other actions.
930	   o  "confirm": This action instructs the focus to allow the request.
931	      The focus then uses the defined floor algorithm to further allow
932	      or deny the floor.  The algorithms used are outside the scope of
933	      this document.

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

940	4.5.4.  <conference-floor-policy>

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

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

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

974	4.6.  <users>

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

986	4.6.1.  <join-handling>

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

1008	4.6.2.  <user-admission-policy>

1010	   The <user-admission-policy> is an element that lets an organizer (or
1011	   a participant with appropriate rights) choose a policy for the
1012	   conference that controls how users are allowed into the conference.
1013	   The list of possible values are:

1015	   o  "closedAuthenticated": A 'closedAuthenticated' policy requires
1016	      each conference participant to be in the allowed users list
1017	      (listed under the <allowed-users-list> XML element) with each
1018	      participant being sufficiently (up to local policy) authenticated.
1019	      Conference join requests for users not in the allowed users list
1020	      or participants not authenticated should be rejected unless a
1021	      <join-handling> action of 'confirm' is selected in which case the
1022	      user is placed on a pending list as indicated earlier.
1023	   o  "openAuthenticated": An 'openAuthenticated' policy requires each
1024	      conferencing participant to be sufficiently authenticated (as
1025	      before) but does not restrict which participants can join the
1026	      conference.  Typically this implies that anyone capable of
1027	      authenticating with the conferencing system may join the
1028	      conference.
1029	   o  "anonymous": An 'anonymous' policy allows any join requests in and
1030	      is the least restrictive policy.

1032	4.6.3.  <allowed-users-list>

1034	   The <allowed-users-list> child element contains a list of user URIs
1035	   (e.g.  SIP URI, xcon-userid defined in Section 4.6.5), roles (defined
1036	   in Section 4.6.5.4), or domains (e.g.: *@example.com) that the focus
1037	   uses to determine who can join the conference, who can be invited to
1038	   join a conference, or who the focus needs to "refer to" the
1039	   conference.  The <allowed-users-list> element includes zero or more
1040	   <target> child elements.  This child element includes the mandatory
1041	   'uri' attribute and the mandatory 'method' attribute.  The same 'uri'
1042	   attribute with different method values can appear in the list more
1043	   than once.

1045	   The 'method' attribute is a list with the following values:

1047	   o  "dial-in": The value "dial-in" is used by the focus to determine
1048	      who can join the conference.
1049	   o  "dial-out": The value "dial-out" contains a list of resources that
1050	      the focus will initiate a session with.
1051	   o  "refer": The value "refer" is used by the focus to determine the
1052	      resources that the focus needs to "refer to" the conference.  In
1053	      SIP, this is achieved by the focus sending a REFER request to
1054	      those potential participants.  In a different paradigm, this could
1055	      also mean that the focus sends an SMS or an email to the referred
1056	      user.  This list can be updated during the conference lifetime so
1057	      it can be used for mid-conference refers as well.

1059	   The "refer" value differs from the "dial-out" in that the resources
1060	   on the "refer" value are expected to initiate the session
1061	   establishment toward the focus themselves.  It is also envisioned
1062	   that different users will have different access rights to those lists
1063	   and therefore a separation between the two is needed.

1065	   The <allowed-users-list> element has a <persistent-list> child
1066	   element as well.  Some chatroom systems allow -- and some require --
1067	   registration of detailed information about a user before they are
1068	   allowed to join a chatroom.  The <persistent-list> child element
1069	   stores persistent information about users who are not actively part
1070	   of an ongoing chatroom session.  The <persistent-list> element stores
1071	   the following information:

1073	   o  user: The <user> element stores the name, nickname, the conference
1074	      user identifier (XCON-USERID) and email address of a user.  It has
1075	      three attributes: 'name', 'nickname' and 'id' and an <email>
1076	      element.  Future extensions to this schema may define new elements
1077	      for the <user> element.

1079	   Future extensions to this schema may define new elements for the
1080	   <target> element.

1082	4.6.4.  <deny-users-list>

1084	   The <deny-users-list> child element contains a list of user URIs
1085	   (e.g.  SIP URI, xcon-userid defined in Section 4.6.5), roles (defined
1086	   in Section 4.6.5.4), or domains (e.g.: *@example.com) that the focus
1087	   uses to determine who has been 'banned' from the conference.  Such
1088	   banned users are prevented from re-joining the chatroom until they
1089	   have been un-banned.

1091	4.6.5.  <user> and Its <user> Sub-elements

1093	   The element <user> is described in [RFC4575] and describes a single
1094	   participant in the conference.  The <user> element has an attribute
1095	   'entity'.  Note that the <user> element does not have the attribute
1096	   'state' defined in [RFC4575] for this element because this attribute
1097	   only applies to notifications mechanism.

1099	   The attribute 'entity' contains a unique conference user identifier
1100	   (XCON-USERID) within the scope of a conferencing system.  The URI
1101	   format of this identifier is as follow:

1103	    XCON-USERID = "xcon-userid" ":" conf-user-id

1105	    conf-user-id = 1*(unreserved)

1107	   [unreserved is defined in RFC3986]

1109	   Other user identifiers can be associated with this conference user
1110	   identifier and enable the conferencing system to correlate and map
1111	   these multiple authenticated user identities to a single global user
1112	   identifier.  Figure 4 illustrates an example using the conference
1113	   user identifier in association with the user identity defined for
1114	   BFCP, SIP, and H323 user identity.  It should be noted that a
1115	   conferencing system is free to structure such relationships as
1116	   required and this information is just included as a guideline that
1117	   can be used.

1119	                         +----------------+
1120	                         |   Conference   |
1121	                         |      User      |
1122	                         |   Identifier   |
1123	                         +----------------+
1124	                         |xcon-userid:John|
1125	                         +-------+--------+
1126	                                 |
1127	                                 |
1128	                                 |
1129	          +----------------------+-------------------------+
1130	          |                      |                         |
1131	  +-------+--------+ +-----------+-----------+ +-----------+-----------+
1132	  |  BFCP User ID  | |      SIP User URI     | |     H323 User URI     |
1133	  +----------------+ +-----------------------+ +-----------------------+
1134	  |      543       | |sip:851221@example.com | |h323:taeduk@example.com|
1135	  +----------------+ +-----------------------+ +-----------------------+

1137	                     Figure 4: Conference User Mapping

1139	   The element <user> element contains the <display-text>, <associated-
1140	   aors>, <provide-anonymity>, <roles>, <languages>, <cascaded-focus>,
1141	   <allow-refer-users-dynamically>, <allow-invite-users-dynamically>,
1142	   <allow-remove-users-dynamically>, and <endpoint>.  The following
1143	   sections describe these elements in more detail.

1145	4.6.5.1.  <display-text>

1147	   The <display-text> child element is explained in [RFC4575], section
1148	   5.6.1.

1150	4.6.5.2.  <associated-aors>

1152	   The <associated-aors> child element is explained in [RFC4575],
1153	   section 5.6.2.

1155	4.6.5.3.  <provide-anonymity>

1157	   The <provide-anonymity> element provides anonymity to the user.  In
1158	   this case, the focus provides to the rest of the participants an
1159	   anonymous identity for that user, for example anonymousX, or it does
1160	   not provide any information for that user such that other users can
1161	   not see he is a participant in the conference.  This element only
1162	   affects the way the user information is provided to the other
1163	   participants.  The real information about the user is still stored in
1164	   the data model.  This can be achieved by using the <provide-
1165	   anonymity> element.  This element has three values: 'private', 'semi-
1166	   private' and 'hidden'.  The 'private' value specifies that this user
1167	   is completely anonymous in the conference. 'semi-private' value
1168	   specifies that this user is anonymous to all users with equal or
1169	   lesser permissions in the conference. 'hidden' value specifies that
1170	   other users can not see this participant in the conference.

1172	4.6.5.4.  <roles>

1174	   A role provides the context for the set of conference operations that
1175	   a participant can perform.  This element can contain one of the
1176	   following values: "administrator", "moderator", "user",
1177	   "participant", "observer", and "none".  The roles semantic definition
1178	   is out of the scope of this document and is subject to future policy
1179	   documents.  This element can be extended with new roles in future
1180	   documents.

1182	4.6.5.5.  <languages>

1184	   The <languages> child element is explained in [RFC4575], section
1185	   5.6.4.

1187	4.6.5.6.  <cascaded-focus>

1189	   The <cascaded-focus> child element is explained in [RFC4575], section
1190	   5.6.5.

1192	4.6.5.7.  <allow-refer-users-dynamically>

1194	   The <allow-refer-users-dynamically> element represents a boolean
1195	   action.  If set to TRUE, a participant is allowed to instruct the
1196	   focus to refer a user to the conference without modifying the
1197	   <allowed-users-list> (in SIP terms, a participant is allowed to send
1198	   a REFER request to the focus which results in the focus sending a
1199	   REFER request to the user the referrer wishes to join the
1200	   conference).  If set to FALSE, the refer request is rejected.  If
1201	   this element is undefined it has a value of FALSE, causing the refer
1202	   to be rejected.

1204	4.6.5.8.  <allow-invite-users-dynamically>

1206	   The <allow-invite-users-dynamically> element represents a boolean
1207	   action.  If set to TRUE, a participant is allowed to instruct the
1208	   focus to invite a user to the conference without modifying the
1209	   <allowed-users-list> list (in SIP terms, a participant is allowed to
1210	   send a REFER request to the focus which results in the focus sending
1211	   an INVITE request to the user the referrer wishes to join the
1212	   conference).  If set to FALSE, the refer request is rejected.  If
1213	   this element is undefined it has a value of FALSE, causing the refer
1214	   to be rejected.

1216	4.6.5.9.  <allow-remove-users-dynamically>

1218	   The <allow-remove-users-dynamically> element represents a boolean
1219	   action.  If set to TRUE, a participant is allowed to instruct the
1220	   focus to remove a user from the conference without modifying the
1221	   ruleset (in SIP terms, a participant is allowed to send a REFER
1222	   request to the focus which results in the focus sending an BYE
1223	   request to the user the referrer wishes to leave the conference).  If
1224	   set to FALSE, the refer request is rejected.  If this element is
1225	   undefined it has a value of FALSE, causing the refer to be rejected.

1227	4.6.5.10.  <endpoint>

1229	   The <endpoint> child element is defined in [RFC4575].  It can provide
1230	   the desired level of detail about the user's devices and their
1231	   signaling sessions taking part in the conference.  The <endpoint>
1232	   element in this document does not defined the 'state' attribute
1233	   defined in [RFC4575] for the same element since the 'state' attribute
1234	   only applies to notification mechanisms.

1236	   The <endpoint> element has the following child elements: <display-
1237	   text>, <referred>, <status>, <joining-method>, <joining-info>,
1238	   <disconnection-method>, <disconnection-info>, <media>, <floor>,and
1239	   <call-info>.  All the <endpoint> child elements are defined in
1240	   [RFC4575] with the exception of the <floor> element.

1242	   The <floor> element describes a floor that joins this participant in
1243	   the conference.  If a participant, for instance, needs to talk in the
1244	   conference, it first needs to get the floor from the chair of the
1245	   conference.  The <floor> element has an attribute 'id' which uniquely
1246	   identifies a floor or floors within a conference.  The 'id' attribute
1247	   corresponds to the floor-id identifier defined in [RFC4582] section
1248	   5.2.2.  The <floor> element has a "Boolean" value.  A value of FALSE
1249	   indicates that this user does not hold the floor in this moment.  If
1250	   this control is not specified, this user SHOULD NOT specify the floor
1251	   option.

1253	   Besides the <floor> element, the <endpoint>/<media> element has two
1254	   other child elements defined in this document, the <to-mixer>, and
1255	   the <from-mixer>:

1257	   o  <from-mixer>, <to-mixer>: These are controls that apply to a
1258	      user's media stream being sent from the mixer to the participants
1259	      endpoint or to the mixer from the participants endpoint.  The <to-
1260	      mixer> element details properties associated with the incoming
1261	      streams to the mixer (streams sent to the mixer from the
1262	      participant).  The <from-mixer> element details properties
1263	      associated with the outgoing streams from the mixer (sent from the
1264	      mixer to the participant).  Both of these elements have the
1265	      attribute 'name'.  The 'name' attribute has the values "VideoIn",
1266	      "VideoOut", "AudioOut", and "AudioIn".  The "VideoOut" and
1267	      "AudioOut" media streams detail properties associated with the
1268	      outgoing video and audio from the mixer.  The "VideoIn" and
1269	      "AudioIn" media stream details properties associated with the
1270	      incoming video and audio to the mixer.  More values can be defined
1271	      in the future.  The <to-mixer> and <from-mixer> elements have the
1272	      <controls> child element:
1273	      *  Controls that apply to a specific user would appear under the
1274	         <controls> element.

1276	4.7.  <sidebars-by-ref>

1278	   The <sidebars-by-ref> element contains a set of <entry> child
1279	   elements.  This element is described in [RFC4575], 5.9.1.  Note that
1280	   the <sidebars-by-ref> element does not have the attribute 'state'
1281	   defined in [RFC4575] for this element because this attribute only
1282	   applies to notifications mechanism.

1284	4.8.  <sidebars-by-val>

1286	   The <sidebars-by-val> element contains a set of <entry> child
1287	   elements each containing information about a single sidebar.  This
1288	   element is described in [RFC4575], 5.9.2.  Note that the <sidebars-
1289	   by-val> element does not have the attribute 'state' defined in
1290	   [RFC4575] for this element because this attribute only applies to
1291	   notifications mechanism.

1293	5.  RELAX NG Schema

1295	   In accordance with the Centralized Conferencing Framework document
1296	   [RFC5239], the Conference Object is a logical representation of a
1297	   conference instance.  The conference information schema contains core
1298	   information that is utilized in any conference.  It also contains the
1299	   variable information part of the Conference Object.

1301	   The normative schema is backwards compatible with the [RFC5239], in
1302	   other words, valid [RFC5239] instance documents are also valid
1303	   according to this RELAX NG schema [RELAX].  In addition to
1304	   approximately similar RELAX NG [RELAX] definitions of the [RFC5239],
1305	   this schema contains extension elements in the
1306	   "urn:ietf:params:xml:ns:xcon-conference-info" namespace.

1308	 default namespace = "urn:ietf:params:xml:ns:conference-info"
1309	 namespace xcon = "urn:ietf:params:xml:ns:xcon-conference-info"

1311	 start = element conference-info { conference-type }
1312	 # CONFERENCE TYPE
1313	 conference-type =
1314	   attribute entity { text }
1315	   & anyAttribute
1316	   & conference-description-type?
1317	   & element host-info { host-type }?
1318	   & element conference-state { conference-state-type }?
1319	   & element users { users-type }?
1320	   & element sidebars-by-ref { uris-type }?
1321	   & element sidebars-by-val { sidebars-by-val-type }?
1322	   & element xcon:floor-information { floor-information-type }?
1323	   & anyElement*
1324	 # CONFERENCE DESCRIPTION TYPE
1325	 conference-description-type =
1326	   element conference-description {
1327	     attribute xml:lang { xsd:language }?
1328	     & anyAttribute
1329	     & element display-text { text }?
1330	     & element subject { text }?
1331	     & element free-text { text }?
1332	     & element keywords {
1333	         list { xsd:string* }
1334	       }?
1335	     & element conf-uris { uris-type }?
1336	     & element service-uris { uris-type }?
1337	     & element maximum-user-count { xsd:int }?
1338	     & element available-media { conference-media-type }?
1339	     & element xcon:language { xsd:language }?
1340	     & element xcon:allow-sidebars { xsd:boolean }?
1341	     & element xcon:cloning-parent { xsd:unsignedLong }?
1342	     & element xcon:sidebar-parent { xsd:unsignedLong }?
1343	     & element xcon:conference-time { conferencetime-type }?
1344	     & anyElement*
1345	   }
1346	 # HOST TYPE
1347	 host-type =
1348	   element display-text { text }?
1349	   & element web-page { xsd:anyURI }?
1350	   & element uris { uris-type }?
1351	   & anyElement*
1352	   & anyAttribute
1353	 # CONFERENCE STATE TYPE
1354	 conference-state-type =
1355	   anyAttribute
1356	   & element user-count { xsd:unsignedInt }?
1357	   & element active { xsd:boolean }?
1358	   & element locked { xsd:boolean }?
1359	   & element xcon:allow-conference-event-subscription { xsd:boolean }?
1360	   & anyElement*
1361	 # CONFERENCE MEDIA TYPE
1362	 conference-media-type =
1363	   anyAttribute
1364	   & element entry { conference-medium-type }*
1365	   & anyElement*
1366	 # CONFERENCE MEDIUM TYPE
1367	 conference-medium-type =
1368	   attribute label { text }
1369	   & anyAttribute
1370	   & element display-text { text }?
1371	   & element type { text }?
1372	   & element status { media-status-type }?
1373	   & element xcon:mixing-mode { mixing-mode-type }?
1374	   & element xcon:codecs { codecs-type }?
1375	   & element xcon:controls { control-type }?
1376	   & anyElement*
1377	 # URIs TYPE
1378	 uris-type =
1379	   anyAttribute
1380	   & element entry { uri-type }*
1381	   & anyElement*
1382	 # URI TYPE
1383	 uri-type =
1384	   element uri { xsd:anyURI }
1385	   & element display-text { text }?
1386	   & element purpose { text }?
1387	   & element modified { execution-type }?
1388	   & element xcon:conference-password { text }?
1389	   & anyElement*
1390	   & anyAttribute
1391	 # USERS TYPE
1392	 users-type =
1393	   anyAttribute
1394	   & element user { user-type }*
1395	   & element xcon:join-handling { join-handling-type }?
1396	   & element xcon:user-admission-policy { user-admission-policy-type }?
1397	   & element xcon:allowed-users-list { allowed-users-list-type }?
1398	   & element xcon:deny-users-list { deny-user-list-type }?
1399	   & anyElement*
1400	 # USER TYPE
1401	 user-type =
1402	   attribute entity { xsd:anyURI }
1403	   & anyAttribute
1404	   & element display-text { text }?
1405	   & element associated-aors { uris-type }?
1406	   & element roles {
1407	       element entry { single-role-type }+
1408	     }?
1409	   & element languages {
1410	       list { xsd:language }
1411	     }?
1412	   & element cascaded-focus { xsd:anyURI }?
1413	   & element endpoint { endpoint-type }*
1414	   & element xcon:provide-anonymity { provide-anonymity-type }?
1415	   & element xcon:allow-refer-users-dynamically { xsd:boolean }?
1416	   & element xcon:allow-invite-users-dynamically { xsd:boolean }?
1417	   & element xcon:allow-remove-users-dynamically { xsd:boolean }?
1418	   & anyElement*
1419	 # ENDPOINT TYPE
1420	 endpoint-type =
1421	   attribute entity { text }
1422	   & anyAttribute
1423	   & element display-text { text }?
1424	   & element referred { execution-type }?
1425	   & element status { endpoint-status-type }?
1426	   & element joining-method { joining-type }?
1427	   & element joining-info { execution-type }?
1428	   & element disconnection-method { disconnection-type }?
1429	   & element disconnection-info { execution-type }?
1430	   & element media { media-type }*
1431	   & element call-info { call-type }?
1432	   & element xcon:floor {
1433	       attribute id { text },
1434	       anyAttribute,
1435	       xsd:boolean
1436	     }*

1438	   & anyElement*
1439	 # ENDPOINT STATUS TYPE
1440	 endpoint-status-type =
1441	   "pending"
1442	   | "dialing-out"
1443	   | "dialing-in"
1444	   | "alerting"
1445	   | "on-hold"
1446	   | "connected"
1447	   | "muted-via-focus"
1448	   | "disconnecting"
1449	   | "disconnected"
1450	   | free-text-extension
1451	 # JOINING TYPE
1452	 joining-type =
1453	   "dialed-in" | "dialed-out" | "focus-owner" | free-text-extension
1454	 # DISCONNECTION TYPE
1455	 disconnection-type =
1456	   "departed" | "booted" | "failed" | "busy" | free-text-extension
1457	 # EXECUTION TYPE
1458	 execution-type =
1459	   element when { xsd:dateTime }?
1460	   & element reason { text }?
1461	   & element by { xsd:anyURI }?
1462	   & anyAttribute
1463	 # CALL TYPE
1464	 call-type =
1465	   element sip { sip-dialog-id-type }
1466	   & anyElement*
1467	   & anyAttribute
1468	 # SIP DIALOG ID TYPE
1469	 sip-dialog-id-type =
1470	   element display-text { text }?
1471	   & element call-id { text }
1472	   & element from-tag { text }
1473	   & element to-tag { text }
1474	   & anyElement*
1475	   & anyAttribute
1476	 # MEDIA TYPE
1477	 media-type =
1478	   attribute id { xsd:int }
1479	   & anyAttribute
1480	   & element display-text { text }?
1481	   & element type { text }?
1482	   & element label { text }?
1483	   & element src-id { text }?
1484	   & element status { media-status-type }?
1485	   & element xcon:to-mixer { mixer-type }?
1486	   & element xcon:from-mixer { mixer-type }?
1487	   & anyElement*
1488	 # MEDIA STATUS TYPE
1489	 media-status-type =
1490	   "recvonly"
1491	   | "sendonly"
1492	   | "sendrecv"
1493	   | "inactive"
1494	   | free-text-extension
1495	 # SIDEBARS-BY-VAL TYPE
1496	 sidebars-by-val-type =
1497	   anyAttribute
1498	   & element entry { conference-type }*
1499	   & anyElement*
1500	 # CONFERENCE TIME
1501	 conferencetime-type =
1502	   anyAttribute
1503	   & element xcon:entry {
1504	       element xcon:base { text },
1505	       element xcon:mixing-start-offset {
1506	         time-type,
1507	         attribute required-participant { single-role-type },
1508	         anyAttribute
1509	       }?,
1510	       element xcon:mixing-end-offset {
1511	         time-type,
1512	         attribute required-participant { single-role-type },
1513	         anyAttribute
1514	       }?,
1515	       element xcon:can-join-after-offset { time-type }?,
1516	       element xcon:must-join-before-offset { time-type }?,
1517	       element xcon:request-user { time-type }?,
1518	       element xcon:notify-end-of-conference { xsd:int }?,
1519	       element xcon:allowed-extend-mixing-end-offset { xsd:boolean }?,
1520	       anyElement*
1521	     }*
1522	 # TIME TYPE
1523	 time-type = xsd:dateTime { pattern = ".+T.+Z.*" }
1524	 # SINGLE ROLE TYPE
1525	 single-role-type =
1526	   xsd:string "none"
1527	   | xsd:string "administrator"
1528	   | xsd:string "moderator"
1529	   | xsd:string "user"
1530	   | xsd:string "observer"
1531	   | xsd:string "participant"
1532	   | free-text-extension
1533	 # MIXING MODE TYPE
1534	 mixing-mode-type =
1535	   xsd:string "moderator-controlled"
1536	   | xsd:string "FCFS"
1537	   | xsd:string "automatic"
1538	   | free-text-extension
1539	 # CODECS TYPE
1540	 codecs-type =
1541	   attribute decision { decision-type }
1542	   & anyAttribute
1543	   & element xcon:codec { codec-type }*
1544	   & anyElement*
1545	 # CODEC TYPE
1546	 codec-type =
1547	   attribute name { text }
1548	   & attribute policy { policy-type }
1549	   & anyAttribute
1550	   & element xcon:subtype { text }?
1551	   & anyElement*
1552	 # DECISION TYPE
1553	 decision-type =
1554	   xsd:string "automatic"
1555	   | xsd:string "moderator-controlled"
1556	   | free-text-extension
1557	 # POLICY TYPE
1558	 policy-type =
1559	   xsd:string "allowed" | xsd:string "disallowed" | free-text-extension
1560	 # CONTROL TYPE
1561	 control-type =
1562	   anyAttribute
1563	   & element xcon:mute { xsd:boolean }?
1564	   & element xcon:pause-video { xsd:boolean }?
1565	   & element xcon:gain { gain-type }?
1566	   & element xcon:video-layout { video-layout-type }?
1567	   & anyElement*
1568	 # GAIN TYPE
1569	 gain-type = xsd:int { minInclusive = "-127" maxInclusive = "127" }
1570	 # VIDEO LAYOUT TYPE
1571	 video-layout-type =
1572	   xsd:string "single-view"
1573	   | xsd:string "dual-view"
1574	   | xsd:string "dual-view-crop"
1575	   | xsd:string "dual-view-2x1"
1576	   | xsd:string "dual-view-2x1-crop"
1577	   | xsd:string "quad-view"
1578	   | xsd:string "multiple-3x3"
1579	   | xsd:string "multiple-4x4"
1580	   | xsd:string "multiple-5x1"
1581	   | xsd:string "automatic"
1582	   | free-text-extension
1583	 # FLOOR INFORMATION TYPE
1584	 floor-information-type =
1585	   anyAttribute
1586	   & element xcon:conference-ID { xsd:unsignedLong }?
1587	   & element xcon:allow-floor-events { xsd:boolean }?
1588	   & element xcon:floor-request-handling { floor-request-type }?
1589	   & element xcon:conference-floor-policy { conference-floor-policy }?
1590	   & anyElement*
1591	 # FLOOR REQUEST TYPE
1592	 floor-request-type =
1593	   xsd:string "block" | xsd:string "confirm" | free-text-extension
1594	 # CONFERENCE FLOOR POLICY
1595	 conference-floor-policy =
1596	   anyAttribute
1597	   & element xcon:floor {
1598	       attribute id { text }
1599	       & anyAttribute
1600	       & element xcon:media-label { xsd:nonNegativeInteger }+
1601	       & element xcon:algorithm { algorithm-type }?
1602	       & element xcon:max-floor-users { xsd:nonNegativeInteger }?
1603	       & element xcon:moderator-id { xsd:nonNegativeInteger }?
1604	       & anyElement*
1605	     }+
1606	 # ALGORITHM POLICY
1607	 algorithm-type =
1608	   xsd:string "moderator-controlled"
1609	   | xsd:string "FCFS"
1610	   | xsd:string "random"
1611	   | free-text-extension
1612	 # USERS ADMISSION POLICY
1613	 user-admission-policy-type =
1614	   xsd:string "closedAuthenticated"
1615	   | xsd:string "openAuthenticated"
1616	   | xsd:string "anonymous"
1617	   | free-text-extension
1618	 # JOIN HANDLING TYPE
1619	 join-handling-type =
1620	   xsd:string "block"
1621	   | xsd:string "confirm"
1622	   | xsd:string "allow"
1623	   | xsd:string "authenticate"
1624	   | xsd:string "directed-operator"
1625	   | free-text-extension
1626	 # DENY USERLIST
1627	 deny-user-list-type =
1628	   anyAttribute
1629	   & element xcon:target {
1630	       attribute uri { xsd:anyURI },
1631	       anyAttribute
1632	     }*
1633	   & anyElement*
1634	 # ALLOWED USERS LIST TYPE
1635	 allowed-users-list-type =
1636	   anyAttribute
1637	   & element xcon:target { target-type }*
1638	   & element xcon:persistent-list { persistent-list-type }?
1639	   & anyElement*
1640	 # PERSISTENT LIST TYPE
1641	 persistent-list-type =
1642	   element xcon:user {
1643	     attribute name { text }
1644	     & attribute nickname { text }
1645	     & attribute id { text }
1646	     & anyAttribute
1647	     & element xcon:e-mail { text }*
1648	     & anyElement*
1649	   }*
1650	   & anyElement*
1651	 # TARGET TYPE
1652	 target-type =
1653	   attribute uri { xsd:anyURI },
1654	   attribute method { method-type },
1655	   anyAttribute
1656	 # METHOD TYPE
1657	 method-type =
1658	   xsd:string "dial-in"
1659	   | xsd:string "dial-out"
1660	   | xsd:string "refer"
1661	   | free-text-extension
1662	 # ANONYMITY TYPE
1663	 provide-anonymity-type =
1664	   "private" | "semi-private" | "hidden" | free-text-extension
1665	 # MIXER TYPE
1666	 mixer-type =
1667	   attribute name { mixer-name-type }
1668	   & anyAttribute
1669	   & element xcon:controls { control-type }*
1670	   & anyElement*
1671	 # MIXER NAME TYPE
1672	 mixer-name-type =
1673	   "VideoIn" | "VideoOut" | "AudioOut" | "AudioIn" | free-text-extension

1675	 # FREE TEXT EXTENSION
1676	 # (re-define this as <notAllowed>,
1677	 #  if extensions beyond this spec are not used)
1678	 free-text-extension = text

1680	 # *********************************
1681	 # EXTENSIBILITY OF THE SCHEMA
1682	 # *********************************

1684	 # EXTENSIBILITY ELEMENTS
1685	 # (re-define this as <empty/>,
1686	 #  if extensions beyond this spec are not used)

1688	 anyElement =
1689	   element * - (conference-description
1690	                | host-info
1691	                | conference-state
1692	                | users
1693	                | sidebars-by-ref
1694	                | sidebars-by-val
1695	                | display-text
1696	                | subject
1697	                | free-text
1698	                | keywords
1699	                | conf-uris
1700	                | service-uris
1701	                | maximum-user-count
1702	                | available-media
1703	                | web-page
1704	                | uris
1705	                | uri
1706	                | user-count
1707	                | active
1708	                | locked
1709	                | entry
1710	                | type
1711	                | status
1712	                | purpose
1713	                | modified
1714	                | user
1715	                | associated-aors
1716	                | roles
1717	                | languages
1718	                | cascaded-focus
1719	                | endpoint
1720	                | referred
1721	                | joining-method
1722	                | joining-info
1723	                | disconnection-method
1724	                | disconnection-info
1725	                | media
1726	                | call-info
1727	                | when
1728	                | reason
1729	                | by
1730	                | sip
1731	                | call-id
1732	                | from-tag
1733	                | to-tag
1734	                | label
1735	                | src-id
1736	                | xcon:conference-password
1737	                | xcon:mixing-mode
1738	                | xcon:codecs
1739	                | xcon:controls
1740	                | xcon:language
1741	                | xcon:allow-sidebars
1742	                | xcon:cloning-parent
1743	                | xcon:sidebar-parent
1744	                | xcon:allow-conference-event-subscription
1745	                | xcon:to-mixer
1746	                | xcon:provide-anonymity
1747	                | xcon:allow-refer-users-dynamically
1748	                | xcon:allow-invite-users-dynamically
1749	                | xcon:allow-remove-users-dynamically
1750	                | xcon:from-mixer
1751	                | xcon:join-handling
1752	                | xcon:user-admission-policy
1753	                | xcon:allowed-users-list
1754	                | xcon:deny-users-list
1755	                | xcon:floor-information
1756	                | xcon:conference-time
1757	                | xcon:provide-anonymity
1758	                | xcon:floor
1759	                | xcon:entry
1760	                | xcon:mixing-start-offset
1761	                | xcon:mixing-end-offset
1762	                | xcon:can-join-after-offset
1763	                | xcon:must-join-before-offset
1764	                | xcon:request-user
1765	                | xcon:notify-end-of-conference
1766	                | xcon:allowed-extend-mixing-end-offset
1767	                | xcon:codec
1768	                | xcon:subtype
1769	                | xcon:mute
1770	                | xcon:pause-video
1771	                | xcon:gain
1772	                | xcon:video-layout
1773	                | xcon:conference-ID
1774	                | xcon:allow-floor-events
1775	                | xcon:floor-request-handling
1776	                | xcon:conference-floor-policy
1777	                | xcon:media-label
1778	                | xcon:algorithm
1779	                | xcon:max-floor-users
1780	                | xcon:moderator-id
1781	                | xcon:target
1782	                | xcon:persistent-list
1783	                | xcon:e-mail
1784	                | xcon:user) { anyExtension }
1785	 anyExtension =
1786	   (attribute * { text }
1787	    | any)*
1788	 any =
1789	   element * {
1790	     (attribute * { text }
1791	      | text
1792	      | any)*
1793	   }

1795	 # EXTENSIBILITY ATTRIBUTES
1796	 # (re-define this as <empty/>,
1797	 #  if extensions beyond this spec are not used)

1799	 anyAttribute =
1800	   attribute * - (xml:lang
1801	                  | entity
1802	                  | required-participant
1803	                  | label
1804	                  | decision
1805	                  | name
1806	                  | policy
1807	                  | uri
1808	                  | method
1809	                  | id
1810	                  | nickname) { text }*

1812	6.  XML Schema Extensibility

1814	   The Conference Information Data Model defined in this document is
1815	   meant to be extensible toward specific application domains.  Such
1816	   extensions are accomplished by defining elements, child elements and
1817	   attributes that are specific to the desired application domain.  The
1818	   IETF MAY extend the data model schema with unqualified attributes or
1819	   extension elements from the "urn:ietf:params:xml:ns:" "sub-namespace"
1820	   in the future.  Other instances are free to define extension elements
1821	   or attributes under other namespaces.

1823	   Elements or attributes from unknown namespaces MUST be ignored.

1825	7.  XML Example

1827	   The following is an example of a conference information document.
1828	   The conference starts on October 17, 2007, at 10:30 AM in New York
1829	   City and finishes the same day at 12:30 PM every week.  In this
1830	   example, there are currently 3 participants in a conference, one
1831	   administrator, one moderator, and one participant.  Sidebars are
1832	   allowed in this conference and ,consequently, there is one sidebar in
1833	   the conference.  In addition, Alice and Carol are using a floor in
1834	   the main conference to manage the audio and video resources.  At the
1835	   moment, Alice is assigned to use the floor.

1837	<?xml version="1.0" encoding="UTF-8"?>
1838	<conference-info
1839	        xmlns="urn:ietf:params:xml:ns:conference-info"
1840	        xmlns:xcon="urn:ietf:params:xml:ns:xcon-conference-info"
1841	        entity="conference123@example.com">
1842	        <!--
1843	            CONFERENCE DESCRIPTION
1844	        -->
1845	        <conference-description xml:lang="en-us">
1846	            <display-text>Discussion of Formula-1 racing</display-text>
1847	            <subject>Sports:Formula-1</subject>
1848	            <free-text>This is a conference example</free-text>
1849	            <keywords>Formula-1 cars</keywords>
1850	            <!--
1851	                CONFERENCE UNIQUE IDENTIFIERS
1852	            -->
1853	            <conf-uris>
1854	                <entry>
1855	                    <uri>tel:+3585671234</uri>
1856	                    <display-text>Conference Bridge</display-text>
1857	                    <purpose>participation</purpose>
1858	                    <xcon:conference-password
1859	                     >5678</xcon:conference-password>
1860	                </entry>
1861	                <entry>
1862	                    <uri>http://www.example.com/live.ram</uri>
1863	                    <purpose>streaming</purpose>
1864	                </entry>
1865	            </conf-uris>
1866	            <!--
1867	                SERVICE URIS

1869	            -->
1870	            <service-uris>
1871	                <entry>
1872	                    <uri>mailto:bob@example.com</uri>
1873	                    <display-text>email</display-text>
1874	                </entry>
1875	            </service-uris>
1876	            <!--
1877	                MAXIMUM USER COUNT
1878	            -->
1879	            <maximum-user-count>50</maximum-user-count>
1880	            <!--
1881	                AVAILABLE MEDIA
1882	            -->
1883	            <available-media>
1884	                <entry label="10234">
1885	                    <display-text>main audio</display-text>
1886	                    <type>audio</type>
1887	                    <status>sendrecv</status>
1888	                    <xcon:mixing-mode>automatic</xcon:mixing-mode>
1889	                    <xcon:codecs decision="automatic">
1890	                        <xcon:codec name="122" policy="allowed">
1891	                           <xcon:subtype>PCMU</xcon:subtype>
1892	                        </xcon:codec>
1893	                    </xcon:codecs>
1894	                    <xcon:controls>
1895	                        <xcon:mute>true</xcon:mute>
1896	                        <xcon:gain>50</xcon:gain>
1897	                    </xcon:controls>
1898	                </entry>
1899	                <entry label="10235">
1900	                    <display-text>main video</display-text>
1901	                    <type>video</type>
1902	                    <status>sendrecv</status>
1903	                    <xcon:mixing-mode>automatic</xcon:mixing-mode>
1904	                    <xcon:codecs decision="automatic">
1905	                        <xcon:codec name="123" policy="allowed">
1906	                           <xcon:subtype>H.263</xcon:subtype>
1907	                        </xcon:codec>
1908	                    </xcon:codecs>
1909	                    <xcon:controls>
1910	                        <xcon:video-layout
1911	                          >single-view</xcon:video-layout>
1912	                    </xcon:controls>
1913	                </entry>
1914	            </available-media>

1916	            <xcon:language>En-us</xcon:language>
1917	            <xcon:allow-sidebars>true</xcon:allow-sidebars>
1918	            <!--
1919	                CONFERENCE TIME
1920	            -->

1922	            <xcon:conference-time>
1923	                <xcon:entry>
1924	                    <xcon:base>BEGIN:VCALENDAR
1925	  PRODID:-//LlamaSpinner Inc.//NONSGML CamelCall//EN
1926	  VERSION:2.0
1927	  BEGIN:VEVENT
1928	  DTSTAMP:20071003T140728Z
1929	  UID:20071003T140728Z-345FDA-carol@example.com
1930	  ORGANIZER:MAILTO:carol@example.com
1931	  DTSTART:20071017T143000Z
1932	  RRULE:FREQ=WEEKLY
1933	  DTEND:20071217T163000Z
1934	  END:VEVENT
1935	  END:VCALENDAR</xcon:base>
1936	                    <xcon:mixing-start-offset
1937	                        required-participant="moderator"
1938	                       >2007-10-17T14:29:00Z</xcon:mixing-start-offset>
1939	                    <xcon:mixing-end-offset
1940	                        required-participant="participant"
1941	                       >2007-10-17T16:31:00Z</xcon:mixing-end-offset>
1942	                    <xcon:must-join-before-offset
1943	                       >2007-10-17T15:30:00Z
1944	                       </xcon:must-join-before-offset>
1945	                </xcon:entry>
1946	            </xcon:conference-time>

1948	        </conference-description>
1949	        <!--
1950	            HOST INFO
1951	        -->
1952	        <host-info>
1953	            <display-text>Formula1</display-text>
1954	            <web-page>http://www.example.com/formula1/</web-page>
1955	            <uris>
1956	                <entry>
1957	                    <uri>sip:alice@example.com</uri>
1958	                </entry>
1959	                <entry>
1960	                    <uri>sip:carol@example.com</uri>
1961	                </entry>
1962	            </uris>
1963	        </host-info>
1964	        <!--
1965	            CONFERENCE STATE
1966	        -->
1967	        <conference-state>
1968	            <user-count>3</user-count>
1969	            <active>true</active>
1970	            <locked>false</locked>
1971	            <xcon:allow-conference-event-subscription
1972	              >true</xcon:allow-conference-event-subscription>

1974	       </conference-state>
1975	        <!--
1976	            USERS
1977	        -->
1978	        <users>
1979	            <!--
1980	                USER BOB
1981	            -->
1982	            <user entity="bob534">
1983	                <display-text>Bob Hoskins</display-text>
1984	                <associated-aors>
1985	                    <entry>
1986	                        <uri>mailto:bob@example.com</uri>
1987	                        <display-text>email</display-text>
1988	                    </entry>
1989	                </associated-aors>
1990	                <roles>
1991	                    <entry>participant</entry>
1992	                </roles>
1993	                <languages>en-us</languages>

1995	                <!--
1996	                    ENDPOINTS
1997	                -->
1998	                <endpoint entity="sip:bob@example.com">
1999	                    <display-text>Bob's Laptop</display-text>
2000	                    <referred>
2001	                        <when>2007-10-17T14:00:00Z</when>
2002	                        <reason>expert required</reason>
2003	                        <by>sip:alice@example.com</by>
2004	                    </referred>
2005	                    <status>connected</status>
2006	                    <joining-method>dialed-out</joining-method>
2007	                    <joining-info>
2008	                        <when>2007-10-17T14:00:00Z</when>
2009	                        <reason>invitation</reason>
2010	                        <by>sip:alice@example.com</by>
2011	                    </joining-info>
2012	                    <!--
2013	                        MEDIA
2014	                    -->
2015	                    <media id="1">
2016	                        <type>video</type>
2017	                        <label>10235</label>
2018	                        <src-id>432424</src-id>
2019	                        <status>sendrecv</status>
2020	                        <xcon:to-mixer name="VideoIn">
2021	                            <xcon:controls>
2022	                                <xcon:video-layout
2023	                                   >single-view</xcon:video-layout>
2024	                            </xcon:controls>
2025	                        </xcon:to-mixer>
2026	                    </media>
2027	                    <!--
2028	                        CALL INFO
2029	                    -->
2030	                    <call-info>
2031	                        <sip>
2032	                            <display-text>full info</display-text>
2033	                            <call-id>hsjh8980vhsb78</call-id>
2034	                            <from-tag>vav738dvbs</from-tag>
2035	                            <to-tag>8954jgjg8432</to-tag>
2036	                        </sip>
2037	                    </call-info>
2038	                </endpoint>
2039	                <xcon:provide-anonymity
2040	                 >semi-private</xcon:provide-anonymity>
2041	                 <xcon:allow-refer-users-dynamically
2042	                    >false</xcon:allow-refer-users-dynamically>
2043	                <xcon:allow-invite-users-dynamically
2044	                    >false</xcon:allow-invite-users-dynamically>
2045	                <xcon:allow-remove-users-dynamically
2046	                    >false</xcon:allow-remove-users-dynamically>
2047	            </user>

2049	            <!--
2050	                USER ALICE
2051	            -->
2052	            <user entity="alice334">
2053	                <display-text>Alice Kay</display-text>
2054	                <associated-aors>
2055	                    <entry>
2056	                        <uri>mailto:alice@example.com</uri>
2057	                        <display-text>email</display-text>
2058	                    </entry>
2059	                </associated-aors>
2060	                <roles>
2061	                    <entry>moderator</entry>
2062	                </roles>
2063	                <languages>en-us</languages>
2064	                <!--
2065	                    ENDPOINTS
2066	                -->
2067	                <endpoint entity="sip:alice@example.com">
2068	                    <display-text>Alice's Desktop</display-text>
2069	                    <status>connected</status>
2070	                    <joining-method>dialed-in</joining-method>
2071	                    <joining-info>
2072	                        <when>2007-10-17T13:35:08Z</when>
2073	                        <reason>invitation</reason>
2074	                        <by>sip:conference@example.com</by>
2075	                    </joining-info>
2076	                    <!--
2077	                        MEDIA
2078	                    -->
2079	                    <media id="1">
2080	                        <type>video</type>
2081	                        <label>10235</label>
2082	                        <src-id>432424</src-id>
2083	                        <status>sendrecv</status>
2084	                        <xcon:to-mixer name="VideoIn">
2085	                         <xcon:controls>
2086	                            <xcon:video-layout
2087	                              >single-view</xcon:video-layout>
2088	                         </xcon:controls>
2089	                        </xcon:to-mixer>
2090	                    </media>
2091	                    <media id="2">
2092	                        <type>audio</type>
2093	                        <label>10234</label>
2094	                        <src-id>532535</src-id>
2095	                        <status>sendrecv</status>
2096	                        <xcon:to-mixer name="VideoIn">
2097	                          <xcon:controls>
2098	                            <xcon:gain>50</xcon:gain>
2099	                          </xcon:controls>
2100	                        </xcon:to-mixer>
2101	                        <xcon:from-mixer name="VideoOut">
2102	                          <xcon:controls>
2103	                              <xcon:gain>50</xcon:gain>
2104	                          </xcon:controls>
2105	                        </xcon:from-mixer>
2106	                    </media>
2107	                    <!--
2108	                        CALL INFO

2110	                    -->
2111	                    <call-info>
2112	                        <sip>
2113	                            <display-text>full info</display-text>
2114	                            <call-id>truy45469123478</call-id>
2115	                            <from-tag>asd456cbgt</from-tag>
2116	                            <to-tag>3456jgjg1234</to-tag>
2117	                        </sip>
2118	                    </call-info>
2119	                    <xcon:floor id="345">true</xcon:floor>
2120	                </endpoint>
2121	                <xcon:provide-anonymity>private</xcon:provide-anonymity>
2122	                <xcon:allow-refer-users-dynamically
2123	                    >true</xcon:allow-refer-users-dynamically>
2124	                <xcon:allow-invite-users-dynamically
2125	                    >true</xcon:allow-invite-users-dynamically>
2126	                <xcon:allow-remove-users-dynamically
2127	                    >true</xcon:allow-remove-users-dynamically>
2128	            </user>

2130	            <!--
2131	                USER CAROL
2132	            -->
2133	            <user entity="carol233">
2134	                <display-text>Carol More</display-text>
2135	                <associated-aors>
2136	                    <entry>
2137	                        <uri>mailto:carol@example.com</uri>
2138	                        <display-text>email</display-text>
2139	                    </entry>
2140	                </associated-aors>
2141	                <roles>
2142	                    <entry>administrator</entry>
2143	                </roles>
2144	                <languages>en-us</languages>
2145	                <!--
2146	                    ENDPOINTS
2147	                -->
2148	                <endpoint entity="sip:carol@example.com">
2149	                    <display-text>Carol's Computer</display-text>
2150	                    <status>connected</status>
2151	                    <joining-method>dialed-in</joining-method>
2152	                    <joining-info>
2153	                        <when>2007-10-17T13:30:05Z</when>
2154	                        <reason>invitation</reason>
2155	                        <by>sip:conference@example.com</by>
2156	                    </joining-info>
2157	                    <!--
2158	                        MEDIA
2159	                    -->
2160	                    <media id="1">
2161	                        <type>video</type>
2162	                        <label>10235</label>
2163	                        <src-id>432424</src-id>
2164	                        <status>sendrecv</status>
2165	                        <xcon:to-mixer name="VideoIn">
2166	                            <xcon:controls>
2167	                                <xcon:video-layout
2168	                              >single-view</xcon:video-layout>
2169	                         </xcon:controls>
2170	                        </xcon:to-mixer>
2171	                    </media>
2172	                    <media id="2">
2173	                        <type>audio</type>
2174	                        <label>10234</label>
2175	                        <src-id>532535</src-id>
2176	                        <status>sendrecv</status>
2177	                        <xcon:to-mixer name="VideoIn">
2178	                            <xcon:controls>
2179	                                <xcon:gain>50</xcon:gain>
2180	                            </xcon:controls>
2181	                        </xcon:to-mixer>
2182	                        <xcon:from-mixer name="VideoOut">
2183	                            <xcon:controls>
2184	                                <xcon:gain>50</xcon:gain>
2185	                          </xcon:controls>
2186	                        </xcon:from-mixer>
2187	                    </media>
2188	                    <!--
2189	                        CALL INFO
2190	                    -->
2191	                    <call-info>
2192	                        <sip>
2193	                            <display-text>full info</display-text>
2194	                            <call-id>wevb12562321894</call-id>
2195	                            <from-tag>asw456wedf</from-tag>
2196	                            <to-tag>2365dfrt3497</to-tag>
2197	                        </sip>
2198	                    </call-info>

2200	                    <xcon:floor id="345">false</xcon:floor>
2201	                </endpoint>

2203	                <xcon:provide-anonymity>private</xcon:provide-anonymity>
2204	                <xcon:allow-refer-users-dynamically
2205	                    >true</xcon:allow-refer-users-dynamically>

2207	                <xcon:allow-invite-users-dynamically
2208	                    >true</xcon:allow-invite-users-dynamically>
2209	                <xcon:allow-remove-users-dynamically
2210	                    >true</xcon:allow-remove-users-dynamically>

2212	            </user>

2214	            <xcon:join-handling>allow</xcon:join-handling>
2215	            <xcon:user-admission-policy
2216	               >openAuthenticated</xcon:user-admission-policy>
2217	            <!--
2218	                ALLOWED USERS LIST
2219	            -->
2220	            <xcon:allowed-users-list>
2221	                <xcon:target uri="sip:bob@example.com"
2222	                    method="dial-out"/>
2223	                <xcon:target uri="sip:alice@example.com"
2224	                    method="dial-out"/>
2225	                <xcon:target uri="sip:carol@example.com"
2226	                    method="dial-out"/>
2227	                <xcon:target uri="sip:john@example.com"
2228	                    method="refer"/>
2229	            </xcon:allowed-users-list>
2230	            <!--
2231	                DENY USERS LIST
2232	            -->
2233	            <xcon:deny-users-list>
2234	                <xcon:target uri="sip:charlie@example.com"/>
2235	            </xcon:deny-users-list>
2236	        </users>
2237	        <!--
2238	            SIDEBARS BY REFERENCE
2239	        -->
2240	        <sidebars-by-ref>
2241	            <entry>
2242	                <uri>conf223</uri>
2243	                <display-text>private with Bob</display-text>
2244	            </entry>
2245	        </sidebars-by-ref>
2246	        <!--
2247	            SIDEBARS BY VALUE
2248	        -->
2249	        <sidebars-by-val>
2250	            <entry entity="conf223">
2251	                <users>
2252	                    <user entity="bob534"/>
2253	                    <user entity="carol233"/>
2254	                </users>

2256	            </entry>
2257	        </sidebars-by-val>
2258	        <!--
2259	            FLOOR INFORMATION
2260	        -->
2261	        <xcon:floor-information>
2262	            <xcon:conference-ID>567</xcon:conference-ID>
2263	            <xcon:allow-floor-events>true</xcon:allow-floor-events>
2264	            <xcon:floor-request-handling
2265	             >confirm</xcon:floor-request-handling>

2267	            <xcon:conference-floor-policy>
2268	                <xcon:floor id="345">
2269	                    <xcon:media-label>10234</xcon:media-label>
2270	                    <xcon:media-label>10235</xcon:media-label>
2271	                    <xcon:algorithm
2272	                     >moderator-controlled</xcon:algorithm>
2273	                    <xcon:max-floor-users>1</xcon:max-floor-users>
2274	                    <xcon:moderator-id>234</xcon:moderator-id>
2275	                </xcon:floor>
2276	            </xcon:conference-floor-policy>
2277	        </xcon:floor-information>

2279	    </conference-info>

2281	   Note that due to RFC formatting conventions, this documents splits
2282	   lines whose content would exceed 72 characters.  Two backslash
2283	   characters mark where line folding has taken place.  These
2284	   backslashes would not appear in the actual XML data model.

2286	8.  Security Considerations

2288	   There are numerous security considerations for this document.  This
2289	   section considers them.

2291	8.1.  Authentication

2293	   Different conferencing protocols will support different types of
2294	   authentication mechanisms.  Since a variety of signaling protocols
2295	   are possible, a variety of authentication mechanism may need to be
2296	   mapped from the different protocols.

2298	   Futhermore, users may use different namespaces to access to a
2299	   conference.  So a mapping database has to specify the acceptable
2300	   range of namespace for a user.  Doing so, a users will not access the
2301	   same conference twice using a different namespace.

2303	   The security considerations for authentication (section 10.1)
2304	   described in the centralized conferencing framework [RFC4575] applies
2305	   to this document.  The focus must ensure that only authorized
2306	   entities are able to manipulate the data to access the information.

2308	8.2.  Confidentiality

2310	   Participants of a conference may not want to reveal some private
2311	   information to other users.  The Conference Information Data Model
2312	   contains sensitive data which should not be analyzed or given to
2313	   anyone.  Confidentiality is provided through encryption.  Strong end-
2314	   to-end authentication and encryption can be done using public keys,
2315	   and end-to-end encryption can be done using private keys.  It is
2316	   RECOMMENDED that the protocols that manipulated the conference
2317	   information data model use a strong encryption for conference
2318	   information protection.

2320	8.3.  Integrity

2322	   A conferencing system may maintain a mapping database between the
2323	   conference object identifiers and the identifiers associated with
2324	   each of the complementary centralized conferencing protocols, as well
2325	   as, a mapping between the conference user identifiers and the
2326	   identifiers associated with each user in a conference.  This mapping
2327	   database contains sensitive data.  It is RECOMMENDED that the mapping
2328	   database has integrity when it is established, the integrity has to
2329	   be protected, and the database has to be maintained to ensure changes
2330	   in namespaces are accurately reflected.

2332	9.  IANA Considerations

2334	9.1.  Relax NG Schema Registration
2335	  This specification registers a schema. The schema can be found
2336	  as the sole content of Section 5.

2338	     URI:  urn:ietf:params:xml:ns:xcon-conference-info

2340	     Registrant Contact: IETF XCON working group,
2341	        <xcon@ietf.org>, Oscar Novo
2342	        <Oscar.Novo@ericsson.com>

2344	     Relax NG Schema:  The Relax NG schema to be registered is contained
2345	        in Section 5.  Its first line is

2347	     namespace a = "http://relaxng.org/ns/compatibility/annotations/1.0"

2349	        and its last line is

2351	     disconnection-type = "departed" | "booted" | "failed" | "busy"

2353	9.2.  XML Namespace Registration
2354	   This section registers a new XML namespace.

2356	      URI:  urn:ietf:params:xml:ns:xcon-conference-info

2358	      Registrant Contact: IETF XCON working group,
2359	         <xcon@ietf.org>, Oscar Novo
2360	         <Oscar.Novo@ericsson.com>

2362	       XML:

2364	         BEGIN
2365	         <?xml version="1.0"?>
2366	         <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
2367	           "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd">
2368	         <html xmlns="http://www.w3.org/1999/xhtml">
2369	         <head>
2370	           <meta http-equiv="content-type"
2371	                 content="text/html;charset=iso-8859-1"/>
2372	           <title> Centralized Conferencing Namespace</title>
2373	         </head>
2374	         <body>
2375	           <h1>Namespace for Centralized Conferencing</h1>
2376	           <h2>urn:ietf:params:xml:ns:xcon-conference-info</h2>
2377	         <p>See <a href="[URL of published RFC]">RFCXXXX
2378	             [NOTE TO IANA/RFC-EDITOR:
2379	              Please replace XXXX with the RFC number of this
2380	             specification.]</a>.</p>
2381	         </body>
2382	         </html>
2383	         END

2385	9.3.  Conference Object Identifier Registration

2387	 The IANA is requested to register the following URI scheme
2388	 under the Permanent URI Schemes register.

2390	 XCON-URI = "xcon" ":" [conf-object-id "@"] host [ ":" port ] [RFC xxxx]

2392	  conf-object-id = 1*( unreserved / "+" / "=" / "/" )

2394	   host, port, and unreserved are defined in RFC3986[RFC3986]

2396	   [Note to the RFC Editor: replace xxxx with the number this RFC gets
2397	   assigned.]
2398	    Subject: Request for XCON-URI Registration
2399	    Person & email address to contact for further information:
2400	         Oscar Novo <oscar novo_at_ericsson.com>
2401	    Specification: RFC XXXX
2402	    Author/Change Controller: IESG
2403	    Comments:
2404	        Identifies the Conference

2406	9.4.  Conference User Identifier Registration

2408	   The IANA is requested to register the following URI scheme
2409	    under the Permanent URI Schemes register.

2411	    XCON-USERID = "xcon-userid" ":" conf-user-id  [ RFC xxxx ]

2413	    conf-user-id = 1*(unreserved)

2415	   unreserved is defined in RFC3986[RFC3986]

2417	   [Note to the RFC Editor: replace xxxx with the number this RFC gets
2418	   assigned.]

2420	    Subject: Request for XCON-USERID Registration
2421	    Person & email address to contact for further information:
2422	         Oscar Novo <oscar novo_at_ericsson.com>
2423	    Specification: RFC XXXX
2424	    Author/Change Controller: IESG
2425	    Comments:
2426	        Identifies the User in the conference

2428	10.  Acknowledgements

2430	   This document is really a distillation of many ideas discussed over a
2431	   long period of time.  These ideas were contributed by many different
2432	   drafts in the XCON working group and the SIPPING working group.  We
2433	   would like to thank Orit Levin, Roni Even, Adam Roach, Mary Barnes,
2434	   Chris Boulton, Umesh Chandra, Hisham Khartabil, Petri Koskelainen,
2435	   Aki Niemi, Rohan Mahy, Jonathan Lennox, and Henning Schulzrinne for
2436	   their comments.  Also, we would like to thank Mary Barnes, and Chris
2437	   Boulton for letting us use the conference and user identifier
2438	   information of their xcon drafts.  Last but not least, we would like
2439	   to express our gratitude to all those reviewers for their invaluable
2440	   contribution: Simon Pietro Romano, Lorenzo Miniero, Tobia Castaldi,
2441	   Miguel Garcia, Mary Barnes, Srivatsa Srinivasan, Avshalom Houri,
2442	   Pierre Tane, and Ben Campbell.

2444	11.  References

2446	11.1.  Normative References

2448	   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
2449	              Requirement Levels", BCP 14, RFC 2119, March 1997.

2451	   [RFC2445]  Dawson, F. and Stenerson, D., "Internet Calendaring and
2452	              Scheduling Core Object Specification (iCalendar)",
2453	              RFC 2445, November 1998.

2455	   [RFC4575]  Rosenberg, J., Schulzrinne, H., and O. Levin, "A Session
2456	              Initiation Protocol (SIP) Event Package for Conference
2457	              State", RFC 4575, August 2006.

2459	   [RFC4582]  Camarillo, G., Ott, J., and K. Drage, "The Binary Floor
2460	              Control Protocol (BFCP)", RFC 4582, November 2006.

2462	   [RFC4583]  Camarillo, G., "Session Description Protocol (SDP) Format
2463	              for Binary Floor Control Protocol (BFCP) Streams",
2464	              RFC 4583, November 2006.

2466	   [RFC5239]  Barnes, M., Boulton, C., and O. Levin, "A Framework for
2467	              Centralized Conferencing", RFC 5239, June 2008.

2469	11.2.  Informative References

2471	   [IANA]     "IANA registry for RTP Payload Types"
2472	              "http://www.iana.org/assignments/rtp-parameters".

2474	   [RELAX]    "RELAX NG Home Page" "http://relaxng.org/".

2476	   [RFC3264]  Rosenberg, J. and H. Schulzrinne, "An Offer/Answer Model
2477	              with Session Description Protocol (SDP)", RFC 3264,
2478	              June 2002.

2480	   [RFC3265]  Roach, A., "Session Initiation Protocol (SIP)-Specific
2481	              Event Notification", RFC 3265, June 2002.

2483	   [RFC3986]  Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
2484	              Resource Identifier (URI): Generic Syntax", STD 66,
2485	              RFC 3986, January 2005.

2487	   [RFC4353]  Rosenberg, J., "A Framework for Conferencing with the
2488	              Session Initiation Protocol (SIP)", RFC 4353,
2489	              February 2006.

2491	   [RFC4855]  Casner, S., "Media Type Registration of RTP Payload
2492	              Formats", RFC 4855, February 2007.

2494	   [RFC5018]  Camarillo, G., "Connection Establishment in the Binary
2495	              Floor Control Protocol (BFCP)", RFC 5018, September 2007.

2497	   [W3C.REC-xml-20001006]
2498	              Sperberg-McQueen, C., Paoli, J., Maler, E., and T. Bray,
2499	              "Extensible Markup Language (XML) 1.0 (Second Edition)",
2500	              World Wide Web Consortium FirstEdition REC-xml-20001006,
2501	              October 2000,
2502	              <http://www.w3.org/TR/2000/REC-xml-20001006>.

2504	Appendix A.  Non-Normative RELAX NG Schema in XML Syntax

2506	 <?xml version="1.0" encoding="UTF-8" ?>
2507	    <grammar
2508	           ns="urn:ietf:params:xml:ns:conference-info"
2509	           xmlns="http://relaxng.org/ns/structure/1.0"
2510	           xmlns:xcon="urn:ietf:params:xml:ns:xcon-conference-info"
2511	           datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
2512	           <start>
2513	            <element name="conference-info">
2514	             <ref name="conference-type"/>
2515	            </element>
2516	           </start>
2517	           <!--
2518	               CONFERENCE TYPE
2519	           -->
2520	           <define name="conference-type">
2521	            <interleave>
2522	            <attribute name="entity">
2523	             <text/>
2524	            </attribute>
2525	            <ref name="anyAttribute"/>
2526	            <optional>
2527	             <ref name="conference-description-type"/>
2528	            </optional>
2529	            <optional>
2530	             <element name="host-info">
2531	              <ref name="host-type"/>
2532	             </element>
2533	            </optional>
2534	            <optional>
2535	             <element name="conference-state">
2536	              <ref name="conference-state-type"/>
2537	             </element>
2538	            </optional>
2539	            <optional>
2540	             <element name="users">
2541	              <ref name="users-type"/>
2542	             </element>
2543	            </optional>
2544	            <optional>
2545	             <element name="sidebars-by-ref">
2546	              <ref name="uris-type"/>
2547	             </element>
2548	            </optional>
2549	            <optional>
2550	             <element name="sidebars-by-val">
2551	              <ref name="sidebars-by-val-type"/>
2552	             </element>
2553	            </optional>
2554	            <optional>
2555	             <element name="xcon:floor-information">
2556	              <ref name="floor-information-type"/>
2557	             </element>
2558	            </optional>
2559	            <zeroOrMore>
2560	             <ref name="anyElement"/>
2561	            </zeroOrMore>
2562	            </interleave>
2563	           </define>
2564	           <!--
2565	               CONFERENCE DESCRIPTION TYPE
2566	           -->
2567	           <define name="conference-description-type">
2568	            <element name="conference-description">
2569	             <interleave>
2570	             <optional>
2571	              <attribute name="xml:lang">
2572	               <data type="language"/>
2573	              </attribute>
2574	             </optional>
2575	             <ref name="anyAttribute"/>
2576	             <optional>
2577	              <element name="display-text">
2578	               <text/>
2579	              </element>
2580	             </optional>
2581	             <optional>
2582	              <element name="subject">
2583	               <text/>
2584	              </element>
2585	             </optional>
2586	             <optional>
2587	              <element name="free-text">
2588	               <text/>
2589	              </element>
2590	             </optional>
2591	             <optional>
2592	              <element name="keywords">
2593	               <list>
2594	                <zeroOrMore>
2595	                 <data type="string"/>
2596	                </zeroOrMore>
2597	               </list>
2598	              </element>
2599	             </optional>
2600	             <optional>
2601	              <element name="conf-uris">
2602	               <ref name="uris-type"/>
2603	              </element>
2604	             </optional>
2605	             <optional>
2606	              <element name="service-uris">
2607	                 <ref name="uris-type"/>
2608	              </element>
2609	             </optional>
2610	             <optional>
2611	              <element name="maximum-user-count">
2612	               <data type="int"/>
2613	              </element>
2614	             </optional>
2615	             <optional>
2616	              <element name="available-media">
2617	               <ref name="conference-media-type"/>
2618	              </element>
2619	             </optional>
2620	             <optional>
2621	              <element name="xcon:language">
2622	               <data type="language"/>
2623	              </element>
2624	             </optional>
2625	             <optional>
2626	              <element name="xcon:allow-sidebars">
2627	               <data type="boolean"/>
2628	              </element>
2629	             </optional>
2630	             <optional>
2631	             <element name="xcon:cloning-parent">
2632	              <data type="unsignedLong"/>
2633	             </element>
2634	             </optional>
2635	             <optional>
2636	             <element name="xcon:sidebar-parent">
2637	              <data type="unsignedLong"/>
2638	             </element>
2639	             </optional>
2640	             <optional>
2641	              <element name="xcon:conference-time">
2642	               <ref name="conferencetime-type"/>
2643	              </element>
2644	             </optional>
2645	             <zeroOrMore>
2646	              <ref name="anyElement"/>
2647	             </zeroOrMore>
2648	             </interleave>
2649	            </element>
2650	           </define>
2651	           <!--
2652	               HOST TYPE
2653	           -->
2654	           <define name="host-type">
2655	            <interleave>
2656	            <optional>
2657	             <element name="display-text">
2658	              <text/>
2659	             </element>
2660	            </optional>
2661	            <optional>
2662	             <element name="web-page">
2663	              <data type="anyURI"/>
2664	             </element>
2665	            </optional>
2666	            <optional>
2667	             <element name="uris">
2668	              <ref name="uris-type"/>
2669	             </element>
2670	            </optional>
2671	            <zeroOrMore>
2672	             <ref name="anyElement"/>
2673	            </zeroOrMore>
2674	            <ref name="anyAttribute"/>
2675	            </interleave>
2676	           </define>
2677	           <!--
2678	               CONFERENCE STATE TYPE
2679	           -->
2680	           <define name="conference-state-type">
2681	            <interleave>
2682	            <ref name="anyAttribute"/>
2683	            <optional>
2684	             <element name="user-count">
2685	              <data type="unsignedInt"/>
2686	             </element>
2687	            </optional>
2688	            <optional>
2689	             <element name="active">
2690	              <data type="boolean"/>
2691	             </element>
2692	            </optional>
2693	            <optional>
2694	             <element name="locked">
2695	              <data type="boolean"/>
2696	             </element>
2697	            </optional>
2698	            <optional>
2699	             <element name="xcon:allow-conference-event-subscription">
2700	              <data type="boolean"/>
2701	             </element>
2702	            </optional>
2703	            <zeroOrMore>
2704	             <ref name="anyElement"/>
2705	            </zeroOrMore>
2706	            </interleave>
2707	           </define>
2708	           <!--
2709	               CONFERENCE MEDIA TYPE
2710	           -->
2711	           <define name="conference-media-type">
2712	            <interleave>
2713	            <ref name="anyAttribute"/>
2714	            <zeroOrMore>
2715	             <element name="entry">
2716	              <ref name="conference-medium-type"/>
2717	             </element>
2718	            </zeroOrMore>
2719	            <zeroOrMore>
2720	             <ref name="anyElement"/>
2721	            </zeroOrMore>
2722	            </interleave>
2723	           </define>
2724	           <!--
2725	               CONFERENCE MEDIUM TYPE

2727	           -->
2728	           <define name="conference-medium-type">
2729	            <interleave>
2730	            <attribute name="label">
2731	             <text/>
2732	            </attribute>
2733	            <ref name="anyAttribute"/>
2734	            <optional>
2735	             <element name="display-text">
2736	              <text/>
2737	             </element>
2738	            </optional>
2739	            <optional>
2740	             <element name="type">
2741	              <text/>
2742	             </element>
2743	            </optional>
2744	            <optional>
2745	             <element name="status">
2746	              <ref name="media-status-type"/>
2747	             </element>
2748	            </optional>
2749	            <optional>
2750	             <element name="xcon:mixing-mode">
2751	              <ref name="mixing-mode-type"/>
2752	             </element>
2753	            </optional>
2754	            <optional>
2755	             <element name="xcon:codecs">
2756	              <ref name="codecs-type"/>
2757	             </element>
2758	            </optional>
2759	            <optional>
2760	             <element name="xcon:controls">
2761	              <ref name="control-type"/>
2762	             </element>
2763	            </optional>
2764	            <zeroOrMore>
2765	             <ref name="anyElement"/>
2766	            </zeroOrMore>
2767	            </interleave>
2768	           </define>
2769	           <!--
2770	               URIs TYPE
2771	           -->
2772	           <define name="uris-type">
2773	            <interleave>
2774	            <ref name="anyAttribute"/>
2775	            <zeroOrMore>
2776	             <element name="entry">
2777	              <ref name="uri-type"/>
2778	             </element>
2779	            </zeroOrMore>
2780	            <zeroOrMore>
2781	             <ref name="anyElement"/>
2782	            </zeroOrMore>
2783	            </interleave>
2784	           </define>
2785	           <!--
2786	               URI TYPE
2787	           -->
2788	           <define name="uri-type">
2789	            <interleave>
2790	            <element name="uri">
2791	             <data type="anyURI"/>
2792	            </element>
2793	            <optional>
2794	             <element name="display-text">
2795	              <text/>
2796	             </element>
2797	            </optional>
2798	            <optional>
2799	             <element name="purpose">
2800	              <text/>
2801	             </element>
2802	            </optional>
2803	            <optional>
2804	             <element name="modified">
2805	              <ref name="execution-type"/>
2806	             </element>
2807	            </optional>
2808	            <optional>
2809	             <element name="xcon:conference-password">
2810	              <text/>
2811	             </element>
2812	            </optional>
2813	            <zeroOrMore>
2814	             <ref name="anyElement"/>
2815	            </zeroOrMore>
2816	            <ref name="anyAttribute"/>
2817	           </interleave>

2819	           </define>
2820	           <!--
2821	               USERS TYPE
2822	           -->
2823	           <define name="users-type">
2824	            <interleave>
2825	            <ref name="anyAttribute"/>
2826	            <zeroOrMore>
2827	             <element name="user">
2828	              <ref name="user-type"/>
2829	             </element>
2830	            </zeroOrMore>
2831	            <optional>
2832	             <element name="xcon:join-handling">
2833	              <ref name="join-handling-type"/>
2834	             </element>
2835	            </optional>
2836	            <optional>
2837	             <element name="xcon:user-admission-policy">
2838	              <ref name="user-admission-policy-type"/>
2839	             </element>
2840	            </optional>
2841	            <optional>
2842	             <element name="xcon:allowed-users-list">
2843	              <ref name="allowed-users-list-type"/>
2844	             </element>
2845	            </optional>
2846	            <optional>
2847	             <element name="xcon:deny-users-list">
2848	              <ref name="deny-user-list-type"/>
2849	             </element>
2850	            </optional>
2851	            <zeroOrMore>
2852	             <ref name="anyElement"/>
2853	            </zeroOrMore>
2854	            </interleave>
2855	           </define>
2856	           <!--
2857	               USER TYPE
2858	           -->
2859	           <define name="user-type">
2860	            <interleave>
2861	            <attribute name="entity">
2862	             <data type="anyURI"/>
2863	            </attribute>
2864	            <ref name="anyAttribute"/>
2865	            <optional>
2866	             <element name="display-text">
2867	              <text/>
2868	             </element>
2869	            </optional>
2870	            <optional>
2871	             <element name="associated-aors">
2872	               <ref name="uris-type"/>
2873	             </element>
2874	            </optional>
2875	            <optional>
2876	             <element name="roles">
2877	              <oneOrMore>
2878	               <element name="entry">
2879	                <ref name="single-role-type"/>
2880	               </element>
2881	              </oneOrMore>
2882	             </element>
2883	            </optional>
2884	            <optional>
2885	             <element name="languages">
2886	              <list>
2887	               <data type="language"/>
2888	              </list>
2889	             </element>
2890	            </optional>
2891	            <optional>
2892	             <element name="cascaded-focus">
2893	              <data type="anyURI"/>
2894	             </element>
2895	            </optional>
2896	            <zeroOrMore>
2897	             <element name="endpoint">
2898	              <ref name="endpoint-type"/>
2899	             </element>
2900	            </zeroOrMore>
2901	            <optional>
2902	             <element name="xcon:provide-anonymity">
2903	              <ref name="provide-anonymity-type"/>
2904	             </element>
2905	            </optional>
2906	           <optional>
2907	             <element name="xcon:allow-refer-users-dynamically">
2908	              <data type="boolean"/>
2909	             </element>
2910	            </optional>
2911	            <optional>
2912	             <element name="xcon:allow-invite-users-dynamically">
2913	              <data type="boolean"/>
2914	             </element>
2915	            </optional>
2916	            <optional>
2917	             <element name="xcon:allow-remove-users-dynamically">
2918	              <data type="boolean"/>

2920	             </element>
2921	            </optional>
2922	             <zeroOrMore>
2923	             <ref name="anyElement"/>
2924	            </zeroOrMore>
2925	            </interleave>
2926	           </define>
2927	           <!--
2928	               ENDPOINT TYPE
2929	           -->
2930	           <define name="endpoint-type">
2931	            <interleave>
2932	            <attribute name="entity">
2933	             <text/>
2934	            </attribute>
2935	            <ref name="anyAttribute"/>
2936	            <optional>
2937	             <element name="display-text">
2938	              <text/>
2939	             </element>
2940	            </optional>
2941	            <optional>
2942	             <element name="referred">
2943	               <ref name="execution-type"/>
2944	             </element>
2945	            </optional>
2946	            <optional>
2947	             <element name="status">
2948	              <ref name="endpoint-status-type"/>
2949	             </element>
2950	            </optional>
2951	            <optional>
2952	             <element name="joining-method">
2953	              <ref name="joining-type"/>
2954	             </element>
2955	            </optional>
2956	            <optional>
2957	             <element name="joining-info">
2958	               <ref name="execution-type"/>
2959	             </element>
2960	            </optional>
2961	            <optional>
2962	             <element name="disconnection-method">
2963	              <ref name="disconnection-type"/>
2964	             </element>
2965	            </optional>
2966	            <optional>
2967	             <element name="disconnection-info">
2968	              <ref name="execution-type"/>
2969	             </element>
2970	            </optional>
2971	            <zeroOrMore>
2972	             <element name="media">
2973	              <ref name="media-type"/>
2974	             </element>
2975	            </zeroOrMore>
2976	            <optional>
2977	             <element name="call-info">
2978	              <ref name="call-type"/>
2979	             </element>
2980	            </optional>
2981	            <zeroOrMore>
2982	             <element name="xcon:floor">
2983	              <attribute name="id">
2984	               <text/>
2985	              </attribute>
2986	              <ref name="anyAttribute"/>
2987	              <data type="boolean"/>
2988	             </element>
2989	            </zeroOrMore>
2990	            <zeroOrMore>
2991	             <ref name="anyElement"/>
2992	            </zeroOrMore>
2993	            </interleave>
2994	           </define>
2995	           <!--
2996	               ENDPOINT STATUS TYPE
2997	           -->
2998	           <define name="endpoint-status-type">
2999	            <choice>
3000	             <value>pending</value>
3001	             <value>dialing-out</value>
3002	             <value>dialing-in</value>
3003	             <value>alerting</value>
3004	             <value>on-hold</value>
3005	             <value>connected</value>
3006	             <value>muted-via-focus</value>
3007	             <value>disconnecting</value>
3008	             <value>disconnected</value>
3009	             <ref name="free-text-extension"/>
3010	            </choice>
3011	           </define>
3012	           <!--
3013	               JOINING TYPE
3014	           -->
3015	           <define name="joining-type">
3016	            <choice>
3017	             <value>dialed-in</value>
3018	             <value>dialed-out</value>
3019	             <value>focus-owner</value>
3020	             <ref name="free-text-extension"/>
3021	            </choice>
3022	           </define>
3023	           <!--
3024	               DISCONNECTION TYPE
3025	           -->
3026	           <define name="disconnection-type">
3027	            <choice>
3028	             <value>departed</value>
3029	             <value>booted</value>
3030	             <value>failed</value>
3031	             <value>busy</value>
3032	             <ref name="free-text-extension"/>
3033	            </choice>
3034	           </define>
3035	           <!--
3036	               EXECUTION TYPE
3037	           -->
3038	           <define name="execution-type">
3039	            <interleave>
3040	            <optional>
3041	             <element name="when">
3042	              <data type="dateTime"/>
3043	             </element>
3044	            </optional>
3045	            <optional>
3046	             <element name="reason">
3047	              <text/>
3048	             </element>
3049	            </optional>
3050	            <optional>
3051	             <element name="by">
3052	              <data type="anyURI"/>
3053	             </element>
3054	            </optional>
3055	            <ref name="anyAttribute"/>
3056	            </interleave>
3057	           </define>
3058	           <!--
3059	               CALL TYPE
3060	           -->
3061	           <define name="call-type">
3062	            <interleave>
3063	             <element name="sip">
3064	              <ref name="sip-dialog-id-type"/>
3065	             </element>
3066	             <zeroOrMore>
3067	              <ref name="anyElement"/>
3068	             </zeroOrMore>
3069	             <ref name="anyAttribute"/>
3070	            </interleave>
3071	           </define>
3072	           <!--
3073	               SIP DIALOG ID TYPE
3074	           -->
3075	           <define name="sip-dialog-id-type">
3076	            <interleave>
3077	            <optional>
3078	            <element name="display-text">
3079	             <text/>
3080	            </element>
3081	            </optional>
3082	            <element name="call-id">
3083	             <text/>
3084	            </element>
3085	            <element name="from-tag">
3086	             <text/>
3087	            </element>
3088	            <element name="to-tag">
3089	             <text/>
3090	            </element>
3091	            <zeroOrMore>
3092	             <ref name="anyElement"/>
3093	            </zeroOrMore>
3094	            <ref name="anyAttribute"/>
3095	            </interleave>
3096	           </define>
3097	           <!--
3098	               MEDIA TYPE
3099	           -->
3100	           <define name="media-type">
3101	            <interleave>
3102	            <attribute name="id">
3103	             <data type="int"/>
3104	            </attribute>
3105	            <ref name="anyAttribute"/>
3106	            <optional>
3107	             <element name="display-text">
3108	              <text/>
3109	             </element>
3110	            </optional>
3111	            <optional>
3112	             <element name="type">
3113	              <text/>
3114	             </element>
3115	            </optional>
3116	            <optional>
3117	             <element name="label">
3118	              <text/>
3119	             </element>
3120	            </optional>
3121	            <optional>
3122	             <element name="src-id">
3123	              <text/>
3124	             </element>
3125	            </optional>
3126	            <optional>
3127	             <element name="status">
3128	              <ref name="media-status-type"/>
3129	             </element>
3130	            </optional>
3131	            <optional>
3132	             <element name="xcon:to-mixer">
3133	              <ref name="mixer-type"/>
3134	             </element>
3135	            </optional>
3136	            <optional>
3137	             <element name="xcon:from-mixer">
3138	              <ref name="mixer-type"/>
3139	             </element>
3140	            </optional>
3141	            <zeroOrMore>
3142	             <ref name="anyElement"/>
3143	            </zeroOrMore>
3144	            </interleave>
3145	           </define>
3146	           <!--
3147	               MEDIA STATUS TYPE
3148	           -->
3149	           <define name="media-status-type">
3150	            <choice>
3151	             <value>recvonly</value>
3152	             <value>sendonly</value>
3153	             <value>sendrecv</value>
3154	             <value>inactive</value>
3155	             <ref name="free-text-extension"/>
3156	            </choice>
3157	           </define>
3158	           <!--
3159	               SIDEBARS-BY-VAL TYPE

3161	           -->
3162	           <define name="sidebars-by-val-type">
3163	            <interleave>
3164	            <ref name="anyAttribute"/>
3165	            <zeroOrMore>
3166	             <element name="entry">
3167	              <ref name="conference-type"/>
3168	             </element>
3169	            </zeroOrMore>
3170	            <zeroOrMore>
3171	             <ref name="anyElement"/>
3172	            </zeroOrMore>
3173	            </interleave>
3174	           </define>
3175	           <!--
3176	               CONFERENCE TIME
3177	           -->
3178	           <define name="conferencetime-type">
3179	            <interleave>
3180	            <ref name="anyAttribute"/>
3181	            <zeroOrMore>
3182	             <element name="xcon:entry">
3183	              <element name="xcon:base">
3184	               <text/>
3185	              </element>
3186	              <optional>
3187	               <element name="xcon:mixing-start-offset">
3188	                 <ref name="time-type"/>
3189	                 <attribute name="required-participant">
3190	                  <ref name="single-role-type"/>
3191	                 </attribute>
3192	                <ref name="anyAttribute"/>
3193	               </element>
3194	              </optional>
3195	              <optional>
3196	               <element name="xcon:mixing-end-offset">
3197	                <ref name="time-type"/>
3198	                <attribute name="required-participant">
3199	                 <ref name="single-role-type"/>
3200	                </attribute>
3201	                <ref name="anyAttribute"/>
3202	               </element>
3203	              </optional>
3204	              <optional>
3205	               <element name="xcon:can-join-after-offset">
3206	                <ref name="time-type"/>
3207	               </element>
3208	              </optional>
3209	              <optional>
3210	               <element name="xcon:must-join-before-offset">
3211	                <ref name="time-type"/>
3212	               </element>
3213	              </optional>
3214	              <optional>
3215	               <element name="xcon:request-user">
3216	                <ref name="time-type"/>
3217	               </element>
3218	              </optional>
3219	              <optional>
3220	               <element name="xcon:notify-end-of-conference">
3221	                <data type="int"/>
3222	               </element>
3223	              </optional>
3224	              <optional>
3225	               <element name="xcon:allowed-extend-mixing-end-offset">
3226	                <data type="boolean"/>
3227	               </element>
3228	              </optional>
3229	              <zeroOrMore>
3230	               <ref name="anyElement"/>
3231	              </zeroOrMore>
3232	             </element>
3233	            </zeroOrMore>
3234	            </interleave>
3235	           </define>
3236	           <!--
3237	               TIME TYPE
3238	           -->
3239	           <define name="time-type">
3240	             <data type="dateTime">
3241	               <param name="pattern">.+T.+Z.*</param>
3242	             </data>
3243	           </define>
3244	           <!--
3245	               SINGLE ROLE TYPE
3246	           -->
3247	           <define name="single-role-type">
3248	            <choice>
3249	             <value type="string">none</value>
3250	             <value type="string">administrator</value>
3251	             <value type="string">moderator</value>
3252	             <value type="string">user</value>
3253	             <value type="string">observer</value>
3254	             <value type="string">participant</value>
3255	             <ref name="free-text-extension"/>
3256	            </choice>

3258	           </define>
3259	           <!--
3260	               MIXING MODE TYPE
3261	           -->
3262	           <define name="mixing-mode-type">
3263	            <choice>
3264	             <value type="string">moderator-controlled</value>
3265	             <value type="string">FCFS</value>
3266	             <value type="string">automatic</value>
3267	             <ref name="free-text-extension"/>
3268	            </choice>
3269	           </define>
3270	           <!--
3271	               CODECS TYPE
3272	           -->
3273	           <define name="codecs-type">
3274	            <interleave>
3275	            <attribute name="decision">
3276	             <ref name="decision-type"/>
3277	            </attribute>
3278	            <ref name="anyAttribute"/>
3279	            <zeroOrMore>
3280	             <element name="xcon:codec">
3281	              <ref name="codec-type"/>
3282	             </element>
3283	            </zeroOrMore>
3284	            <zeroOrMore>
3285	             <ref name="anyElement"/>
3286	            </zeroOrMore>
3287	            </interleave>
3288	           </define>
3289	           <!--
3290	               CODEC TYPE
3291	           -->
3292	           <define name="codec-type">
3293	            <interleave>
3294	            <attribute name="name">
3295	             <text/>
3296	            </attribute>
3297	            <attribute name="policy">
3298	             <ref name="policy-type"/>
3299	            </attribute>
3300	            <ref name="anyAttribute"/>
3301	            <optional>
3302	             <element name="xcon:subtype">
3303	              <text/>
3304	             </element>
3305	            </optional>
3306	            <zeroOrMore>
3307	             <ref name="anyElement"/>
3308	            </zeroOrMore>
3309	            </interleave>
3310	           </define>
3311	           <!--
3312	               DECISION TYPE
3313	           -->
3314	           <define name="decision-type">
3315	            <choice>
3316	             <value type="string">automatic</value>
3317	             <value type="string">moderator-controlled</value>
3318	             <ref name="free-text-extension"/>
3319	            </choice>
3320	           </define>
3321	           <!--
3322	               POLICY TYPE
3323	           -->
3324	           <define name="policy-type">
3325	            <choice>
3326	             <value type="string">allowed</value>
3327	             <value type="string">disallowed</value>
3328	             <ref name="free-text-extension"/>
3329	            </choice>
3330	           </define>
3331	           <!--
3332	               CONTROL TYPE
3333	           -->
3334	           <define name="control-type">
3335	            <interleave>
3336	            <ref name="anyAttribute"/>
3337	            <optional>
3338	             <element name="xcon:mute">
3339	              <data type="boolean"/>
3340	             </element>
3341	            </optional>
3342	            <optional>
3343	             <element name="xcon:pause-video">
3344	              <data type="boolean"/>
3345	             </element>
3346	            </optional>
3347	            <optional>
3348	             <element name="xcon:gain">
3349	              <ref name="gain-type"/>
3350	             </element>
3351	            </optional>
3352	            <optional>
3353	             <element name="xcon:video-layout">
3354	              <ref name="video-layout-type"/>
3355	             </element>
3356	            </optional>
3357	            <zeroOrMore>
3358	             <ref name="anyElement"/>
3359	            </zeroOrMore>
3360	            </interleave>
3361	           </define>
3362	           <!--
3363	               GAIN TYPE
3364	           -->
3365	           <define name="gain-type">
3366	             <data type="int">
3367	               <param name="minInclusive">-127</param>
3368	               <param name="maxInclusive">127</param>
3369	             </data>
3370	           </define>
3371	           <!--
3372	               VIDEO LAYOUT TYPE
3373	           -->
3374	           <define name="video-layout-type">
3375	              <choice>
3376	               <value type="string">single-view</value>
3377	               <value type="string">dual-view</value>
3378	               <value type="string">dual-view-crop</value>
3379	               <value type="string">dual-view-2x1</value>
3380	               <value type="string">dual-view-2x1-crop</value>
3381	               <value type="string">quad-view</value>
3382	               <value type="string">multiple-3x3</value>
3383	               <value type="string">multiple-4x4</value>
3384	               <value type="string">multiple-5x1</value>
3385	               <value type="string">automatic</value>
3386	               <ref name="free-text-extension"/>
3387	              </choice>
3388	           </define>
3389	           <!--
3390	               FLOOR INFORMATION TYPE
3391	           -->
3392	           <define name="floor-information-type">
3393	            <interleave>
3394	            <ref name="anyAttribute"/>
3395	            <optional>
3396	             <element name="xcon:conference-ID">
3397	              <data type="unsignedLong"/>
3398	             </element>
3399	            </optional>
3400	            <optional>
3401	             <element name="xcon:allow-floor-events">
3402	              <data type="boolean"/>
3403	             </element>
3404	            </optional>
3405	            <optional>
3406	             <element name="xcon:floor-request-handling">
3407	              <ref name="floor-request-type"/>
3408	             </element>
3409	            </optional>
3410	            <optional>
3411	             <element name="xcon:conference-floor-policy">
3412	              <ref name="conference-floor-policy"/>
3413	             </element>
3414	            </optional>
3415	            <zeroOrMore>
3416	             <ref name="anyElement"/>
3417	            </zeroOrMore>
3418	            </interleave>
3419	           </define>
3420	           <!--
3421	               FLOOR REQUEST TYPE
3422	           -->
3423	           <define name="floor-request-type">
3424	            <choice>
3425	             <value type="string">block</value>
3426	             <value type="string">confirm</value>
3427	             <ref name="free-text-extension"/>
3428	            </choice>
3429	           </define>
3430	           <!--
3431	               CONFERENCE FLOOR POLICY
3432	           -->
3433	           <define name="conference-floor-policy">
3434	            <interleave>
3435	            <ref name="anyAttribute"/>
3436	            <oneOrMore>
3437	             <element name="xcon:floor">
3438	              <interleave>
3439	              <attribute name="id">
3440	               <text/>
3441	              </attribute>
3442	              <ref name="anyAttribute"/>
3443	              <oneOrMore>
3444	               <element name="xcon:media-label">
3445	                <data type="nonNegativeInteger"/>
3446	               </element>
3447	              </oneOrMore>
3448	              <optional>
3449	               <element name="xcon:algorithm">
3450	                <ref name="algorithm-type"/>
3451	               </element>
3452	              </optional>
3453	              <optional>
3454	               <element name="xcon:max-floor-users">
3455	                <data type="nonNegativeInteger"/>
3456	               </element>
3457	              </optional>
3458	              <optional>
3459	               <element name="xcon:moderator-id">
3460	                <data type="nonNegativeInteger"/>
3461	               </element>
3462	              </optional>
3463	              <zeroOrMore>
3464	               <ref name="anyElement"/>
3465	              </zeroOrMore>
3466	              </interleave>
3467	             </element>
3468	            </oneOrMore>
3469	            </interleave>
3470	           </define>
3471	           <!--
3472	               ALGORITHM POLICY
3473	           -->
3474	           <define name="algorithm-type">
3475	            <choice>
3476	             <value type="string">moderator-controlled</value>
3477	             <value type="string">FCFS</value>
3478	             <value type="string">random</value>
3479	             <ref name="free-text-extension"/>
3480	            </choice>
3481	           </define>
3482	           <!--
3483	               USERS ADMISSION POLICY
3484	           -->
3485	           <define name="user-admission-policy-type">
3486	            <choice>
3487	             <value type="string">closedAuthenticated</value>
3488	             <value type="string">openAuthenticated</value>
3489	             <value type="string">anonymous</value>
3490	             <ref name="free-text-extension"/>
3491	            </choice>
3492	           </define>
3493	           <!--
3494	               JOIN HANDLING TYPE
3495	           -->
3496	           <define name="join-handling-type">
3497	            <choice>
3498	             <value type="string">block</value>
3499	             <value type="string">confirm</value>
3500	             <value type="string">allow</value>
3501	             <value type="string">authenticate</value>
3502	             <value type="string">directed-operator</value>
3503	             <ref name="free-text-extension"/>
3504	            </choice>
3505	           </define>
3506	           <!--
3507	               DENY USERLIST
3508	           -->
3509	           <define name="deny-user-list-type">
3510	            <interleave>
3511	            <ref name="anyAttribute"/>
3512	            <zeroOrMore>
3513	             <element name="xcon:target">
3514	              <attribute name="uri">
3515	               <data type="anyURI"/>
3516	              </attribute>
3517	              <ref name="anyAttribute"/>
3518	             </element>
3519	            </zeroOrMore>
3520	            <zeroOrMore>
3521	             <ref name="anyElement"/>
3522	            </zeroOrMore>
3523	            </interleave>
3524	           </define>
3525	           <!--
3526	               ALLOWED USERS LIST TYPE
3527	           -->
3528	           <define name="allowed-users-list-type">
3529	            <interleave>
3530	            <ref name="anyAttribute"/>
3531	            <zeroOrMore>
3532	             <element name="xcon:target">
3533	              <ref name="target-type"/>
3534	             </element>
3535	            </zeroOrMore>
3536	            <optional>
3537	             <element name="xcon:persistent-list">
3538	              <ref name="persistent-list-type"/>
3539	             </element>
3540	            </optional>
3541	            <zeroOrMore>
3542	             <ref name="anyElement"/>
3543	            </zeroOrMore>
3544	            </interleave>
3545	           </define>
3546	           <!--
3547	               PERSISTENT LIST TYPE
3548	           -->
3549	           <define name="persistent-list-type">
3550	            <interleave>
3551	              <zeroOrMore>
3552	               <element name="xcon:user">
3553	                <interleave>
3554	                <attribute name="name">
3555	                 <text/>
3556	                </attribute>
3557	                <attribute name="nickname">
3558	                 <text/>
3559	                </attribute>
3560	                <attribute name="id">
3561	                 <text/>
3562	                </attribute>
3563	                <ref name="anyAttribute"/>
3564	                <zeroOrMore>
3565	                 <element name="xcon:e-mail">
3566	                  <text/>
3567	                 </element>
3568	                </zeroOrMore>
3569	                <zeroOrMore>
3570	                 <ref name="anyElement"/>
3571	                </zeroOrMore>
3572	                </interleave>
3573	               </element>
3574	             </zeroOrMore>
3575	             <zeroOrMore>
3576	              <ref name="anyElement"/>
3577	             </zeroOrMore>
3578	            </interleave>
3579	           </define>
3580	           <!--
3581	               TARGET TYPE
3582	           -->
3583	           <define name="target-type">
3584	            <attribute name="uri">
3585	             <data type="anyURI"/>
3586	            </attribute>
3587	            <attribute name="method">
3588	             <ref name="method-type"/>
3589	            </attribute>
3590	            <ref name="anyAttribute"/>
3591	           </define>
3592	           <!--
3593	               METHOD TYPE

3595	           -->
3596	           <define name="method-type">
3597	            <choice>
3598	             <value type="string">dial-in</value>
3599	             <value type="string">dial-out</value>
3600	             <value type="string">refer</value>
3601	             <ref name="free-text-extension"/>
3602	            </choice>
3603	           </define>
3604	           <!--
3605	               ANONYMITY TYPE
3606	           -->
3607	           <define name="provide-anonymity-type">
3608	              <choice>
3609	               <value>private</value>
3610	               <value>semi-private</value>
3611	               <value>hidden</value>
3612	               <ref name="free-text-extension"/>
3613	              </choice>
3614	           </define>
3615	           <!--
3616	               MIXER TYPE
3617	           -->
3618	           <define name="mixer-type">
3619	            <interleave>
3620	            <attribute name="name">
3621	             <ref name="mixer-name-type"/>
3622	            </attribute>
3623	            <ref name="anyAttribute"/>
3624	            <zeroOrMore>
3625	             <element name="xcon:controls">
3626	              <ref name="control-type"/>
3627	             </element>
3628	            </zeroOrMore>
3629	            <zeroOrMore>
3630	             <ref name="anyElement"/>
3631	            </zeroOrMore>
3632	            </interleave>
3633	           </define>
3634	           <!--
3635	               MIXER NAME TYPE
3636	           -->
3637	           <define name="mixer-name-type">
3638	             <choice>
3639	              <value>VideoIn</value>
3640	              <value>VideoOut</value>
3641	              <value>AudioOut</value>
3642	              <value>AudioIn</value>
3643	              <ref name="free-text-extension"/>
3644	             </choice>
3645	           </define>
3646	           <!--
3647	               FREE TEXT EXTENSION
3648	               (re-define this as <notAllowed>,
3649	                if extensions beyond this spec are not used)
3650	           -->
3651	           <define name="free-text-extension">
3652	            <text/>
3653	           </define>

3655	           <!--
3656	            *********************************
3657	            EXTENSIBILITY OF THE SCHEMA
3658	            *********************************
3659	           -->
3660	           <!--
3661	               EXTENSIBILITY ELEMENTS
3662	               (re-define this as <empty/>,
3663	                if extensions beyond this spec are not used)
3664	           -->
3665	           <define name="anyElement">
3666	            <element>
3667	             <anyName>
3668	              <except>
3669	               <name>conference-description</name>
3670	               <name>host-info</name>
3671	               <name>conference-state</name>
3672	               <name>users</name>
3673	               <name>sidebars-by-ref</name>
3674	               <name>sidebars-by-val</name>
3675	               <name>display-text</name>
3676	               <name>subject</name>
3677	               <name>free-text</name>
3678	               <name>keywords</name>
3679	               <name>conf-uris</name>
3680	               <name>service-uris</name>
3681	               <name>maximum-user-count</name>
3682	               <name>available-media</name>
3683	               <name>web-page</name>
3684	               <name>uris</name>
3685	               <name>uri</name>
3686	               <name>user-count</name>
3687	               <name>active</name>
3688	               <name>locked</name>
3689	               <name>entry</name>
3690	               <name>type</name>
3691	               <name>status</name>
3692	               <name>purpose</name>
3693	               <name>modified</name>
3694	               <name>user</name>
3695	               <name>associated-aors</name>
3696	               <name>roles</name>
3697	               <name>languages</name>
3698	               <name>cascaded-focus</name>
3699	               <name>endpoint</name>
3700	               <name>referred</name>
3701	               <name>joining-method</name>
3702	               <name>joining-info</name>
3703	               <name>disconnection-method</name>
3704	               <name>disconnection-info</name>
3705	               <name>media</name>
3706	               <name>call-info</name>
3707	               <name>when</name>
3708	               <name>reason</name>
3709	               <name>by</name>
3710	               <name>sip</name>
3711	               <name>call-id</name>
3712	               <name>from-tag</name>
3713	               <name>to-tag</name>
3714	               <name>label</name>
3715	               <name>src-id</name>
3716	               <name>xcon:conference-password</name>
3717	               <name>xcon:mixing-mode</name>
3718	               <name>xcon:codecs</name>
3719	               <name>xcon:controls</name>
3720	               <name>xcon:language</name>
3721	               <name>xcon:allow-sidebars</name>
3722	               <name>xcon:cloning-parent</name>
3723	               <name>xcon:sidebar-parent</name>
3724	               <name>xcon:allow-conference-event-subscription</name>
3725	               <name>xcon:to-mixer</name>
3726	               <name>xcon:provide-anonymity</name>
3727	               <name>xcon:allow-refer-users-dynamically</name>
3728	               <name>xcon:allow-invite-users-dynamically</name>
3729	               <name>xcon:allow-remove-users-dynamically</name>
3730	               <name>xcon:from-mixer</name>
3731	               <name>xcon:join-handling</name>
3732	               <name>xcon:user-admission-policy</name>
3733	               <name>xcon:allowed-users-list</name>
3734	               <name>xcon:deny-users-list</name>
3735	               <name>xcon:floor-information</name>
3736	               <name>xcon:conference-time</name>
3737	               <name>xcon:provide-anonymity</name>
3738	               <name>xcon:floor</name>
3739	               <name>xcon:entry</name>
3740	               <name>xcon:mixing-start-offset</name>
3741	               <name>xcon:mixing-end-offset</name>
3742	               <name>xcon:can-join-after-offset</name>
3743	               <name>xcon:must-join-before-offset</name>
3744	               <name>xcon:request-user</name>
3745	               <name>xcon:notify-end-of-conference</name>
3746	               <name>xcon:allowed-extend-mixing-end-offset</name>
3747	               <name>xcon:codec</name>
3748	               <name>xcon:subtype</name>
3749	               <name>xcon:mute</name>
3750	               <name>xcon:pause-video</name>
3751	               <name>xcon:gain</name>
3752	               <name>xcon:video-layout</name>
3753	               <name>xcon:conference-ID</name>
3754	               <name>xcon:allow-floor-events</name>
3755	               <name>xcon:floor-request-handling</name>
3756	               <name>xcon:conference-floor-policy</name>
3757	               <name>xcon:media-label</name>
3758	               <name>xcon:algorithm</name>
3759	               <name>xcon:max-floor-users</name>
3760	               <name>xcon:moderator-id</name>
3761	               <name>xcon:target</name>
3762	               <name>xcon:persistent-list</name>
3763	               <name>xcon:e-mail</name>
3764	               <name>xcon:user</name>
3765	              </except>
3766	             </anyName>
3767	             <ref name="anyExtension"/>
3768	            </element>
3769	           </define>

3771	           <define name="anyExtension">
3772	            <zeroOrMore>
3773	             <choice>
3774	              <attribute>
3775	               <anyName/>
3776	              </attribute>
3777	              <ref name="any"/>
3778	             </choice>
3779	            </zeroOrMore>
3780	           </define>

3782	           <define name="any">
3783	            <element>
3784	             <anyName/>
3785	             <zeroOrMore>
3786	              <choice>
3787	               <attribute>
3788	                <anyName/>
3789	               </attribute>
3790	               <text/>
3791	               <ref name="any"/>
3792	              </choice>
3793	             </zeroOrMore>
3794	           </element>
3795	           </define>

3797	           <!--
3798	               EXTENSIBILITY ATTRIBUTES
3799	               (re-define this as <empty/>,
3800	                if extensions beyond this spec are not used)
3801	           -->

3803	           <define name="anyAttribute">
3804	            <zeroOrMore>
3805	             <attribute>
3806	              <anyName>
3807	               <except>
3808	                <name ns="http://www.w3.org/XML/1998/namespace">lang
3809	                </name>
3810	                <name ns="">entity</name>
3811	                <name ns="">required-participant</name>
3812	                <name ns="">label</name>
3813	                <name ns="">decision</name>
3814	                <name ns="">name</name>
3815	                <name ns="">policy</name>
3816	                <name ns="">uri</name>
3817	                <name ns="">method</name>
3818	                <name ns="">id</name>
3819	                <name ns="">nickname</name>
3820	               </except>
3821	              </anyName>
3822	             </attribute>
3823	            </zeroOrMore>
3824	           </define>
3825	          </grammar>

3827	Appendix B.  Non-Normative W3C XML Schema

3829	   The non-normative W3C XML schema defines extension elements in the
3830	   "urn:ietf:params:xml:ns:xcon-conference-info" namespace.  Note that
3831	   <xs:any> extensions in this schema are stricter than in the normative
3832	   RELAX NG schema [RELAX], and the normative RELAX NG schema [RELAX]
3833	   allows unordered child elements unlike this schema (and the [RFC4575]
3834	   schema).  Also note that this schema allows also otherwise valid
3835	   extension elements to appear in the non-allowed positions.  Likewise
3836	   the cardinalities of these extension elements can not be constrained
3837	   with this schema.

3839	<?xml version="1.0" encoding="UTF-8"?>
3840	  <xs:schema
3841	     xmlns="urn:ietf:params:xml:ns:xcon-conference-info"
3842	     xmlns:info="urn:ietf:params:xml:ns:conference-info"
3843	     xmlns:xs="http://www.w3.org/2001/XMLSchema"
3844	     attributeFormDefault="unqualified" elementFormDefault="qualified"
3845	     targetNamespace="urn:ietf:params:xml:ns:xcon-conference-info">

3847	    <xs:import namespace="urn:ietf:params:xml:ns:conference-info"
3848	      schemaLocation="rfc4575.xsd"/>

3850	    <xs:import namespace="http://www.w3.org/XML/1998/namespace"
3851	      schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>

3853	    <xs:element name="conference-password" type="xs:string"/>
3854	    <xs:element name="mixing-mode" type="mixing-mode-type"/>
3855	    <xs:element name="codecs" type="codecs-type"/>
3856	    <xs:element name="controls" type="controls-type"/>
3857	    <xs:element name="language" type="xs:language"/>
3858	    <xs:element name="allow-sidebars" type="xs:boolean"/>
3859	    <xs:element name="cloning-parent" type="xs:unsignedLong"/>
3860	    <xs:element name="sidebar-parent" type="xs:unsignedLong"/>
3861	    <xs:element name="conference-time" type="conference-time-type"/>
3862	    <xs:element name="allow-conference-event-subscription"
3863	      type="xs:boolean"/>
3864	    <xs:element name="to-mixer" type="mixer-type"/>
3865	    <xs:element name="provide-anonymity"
3866	      type="provide-anonymity-type"/>
3867	    <xs:element name="allow-refer-users-dynamically"
3868	      type="xs:boolean"/>
3869	    <xs:element name="allow-invite-users-dynamically"
3870	      type="xs:boolean"/>
3871	    <xs:element name="allow-remove-users-dynamically"
3872	      type="xs:boolean"/>
3873	    <xs:element name="from-mixer" type="mixer-type"/>
3874	    <xs:element name="join-handling" type="join-handling-type"/>
3875	    <xs:element name="user-admission-policy"
3876	      type="user-admission-policy-type"/>
3877	    <xs:element name="allowed-users-list"
3878	      type="allowed-users-list-type"/>
3879	    <xs:element name="deny-users-list" type="deny-users-list-type"/>
3880	    <xs:element name="floor-information" type="floor-information-type"/>
3881	    <!-- CONFERENCE TIME -->

3883	    <xs:complexType name="conference-time-type">
3884	      <xs:sequence>
3885	        <xs:element name="entry"
3886	          minOccurs="0" maxOccurs="unbounded">
3887	          <xs:complexType>
3888	            <xs:sequence>
3889	              <xs:element name="base"
3890	                type="xs:string" minOccurs="1"/>
3891	              <xs:element name="mixing-start-offset" minOccurs="0">
3892	                <xs:complexType>
3893	                  <xs:simpleContent>
3894	                    <xs:extension base="time-type">
3895	                     <xs:attribute name="required-participant"
3896	                       type="role-type" use="required"/>
3897	                      <xs:anyAttribute namespace="##any"
3898	                        processContents="lax"/>
3899	                    </xs:extension>
3900	                  </xs:simpleContent>
3901	                </xs:complexType>
3902	              </xs:element>
3903	              <xs:element name="mixing-end-offset" minOccurs="0">
3904	                <xs:complexType>
3905	                  <xs:simpleContent>
3906	                    <xs:extension base="time-type">
3907	                      <xs:attribute name="required-participant"
3908	                        type="role-type" use="required"/>
3909	                      <xs:anyAttribute namespace="##any"
3910	                        processContents="lax"/>
3911	                    </xs:extension>
3912	                  </xs:simpleContent>
3913	                </xs:complexType>
3914	              </xs:element>
3915	              <xs:element name="can-join-after-offset" type="time-type"
3916	                minOccurs="0"/>
3917	              <xs:element name="must-join-before-offset"
3918	                type="time-type" minOccurs="0"/>
3919	              <xs:element name="request-user" type="time-type"
3920	                minOccurs="0"/>
3921	              <xs:element name="notify-end-of-conference"
3922	                type="xs:integer" minOccurs="0"/>
3923	              <xs:element name="allowed-extend-mixing-end-offset"
3924	                type="xs:boolean" minOccurs="0"/>
3925	              <xs:any namespace="##other" processContents="lax"
3926	                minOccurs="0" maxOccurs="unbounded"/>
3927	            </xs:sequence>
3928	          </xs:complexType>

3930	        </xs:element>
3931	        <xs:any namespace="##other" processContents="lax"
3932	          minOccurs="0" maxOccurs="unbounded"/>
3933	      </xs:sequence>
3934	      <xs:anyAttribute namespace="##any" processContents="lax"/>
3935	    </xs:complexType>

3937	    <!-- TIME TYPE -->

3939	     <xs:simpleType name="time-type">
3940	      <xs:restriction base="xs:dateTime">
3941	        <xs:pattern value=".+T.+Z.*"/>
3942	       </xs:restriction>
3943	     </xs:simpleType>

3945	    <!-- ROLE-TYPE -->

3947	    <xs:simpleType name="role-type">
3948	     <xs:restriction base="xs:string">
3949	      <xs:pattern value="none"/>
3950	      <xs:pattern value="administrator"/>
3951	      <xs:pattern value="moderator"/>
3952	      <xs:pattern value="user"/>
3953	      <xs:pattern value="observer"/>
3954	      <xs:pattern value="participant"/>
3955	      <xs:pattern value=".+"/>
3956	     </xs:restriction>
3957	    </xs:simpleType>

3959	    <!-- MIXING MODE TYPE -->

3961	    <xs:simpleType name="mixing-mode-type">
3962	      <xs:restriction base="xs:string">
3963	        <xs:pattern value="moderator-controlled"/>
3964	        <xs:pattern value="FCFS"/>
3965	        <xs:pattern value="automatic"/>
3966	        <xs:pattern value=".+"/>
3967	      </xs:restriction>
3968	    </xs:simpleType>

3970	    <!-- CODECS TYPE -->

3972	    <xs:complexType name="codecs-type">
3973	      <xs:sequence>
3974	        <xs:element name="codec" type="codec-type"/>
3975	        <xs:any namespace="##other" processContents="lax"
3976	          minOccurs="0" maxOccurs="unbounded"/>
3977	      </xs:sequence>
3978	      <xs:attribute name="decision"
3979	        type="decision-type" use="required"/>
3980	      <xs:anyAttribute namespace="##any" processContents="lax"/>
3981	    </xs:complexType>

3983	    <!-- CODEC TYPE -->

3985	    <xs:complexType name="codec-type">
3986	      <xs:sequence>
3987	        <xs:element name="subtype" type="xs:string" minOccurs="0"/>
3988	        <xs:any namespace="##other" processContents="lax"
3989	          minOccurs="0" maxOccurs="unbounded"/>
3990	      </xs:sequence>
3991	      <xs:attribute name="name"
3992	        type="xs:string" use="required"/>
3993	      <xs:attribute name="policy"
3994	        type="policy-type" use="required"/>
3995	      <xs:anyAttribute namespace="##any" processContents="lax"/>
3996	    </xs:complexType>

3998	    <!-- DECISION TYPE -->

4000	    <xs:simpleType name="decision-type">
4001	      <xs:restriction base="xs:string">
4002	        <xs:pattern value="automatic"/>
4003	        <xs:pattern value="moderator-controlled"/>
4004	        <xs:pattern value=".+"/>
4005	      </xs:restriction>
4006	    </xs:simpleType>

4008	    <!-- POLICY TYPE -->

4010	     <xs:simpleType name="policy-type">
4011	      <xs:restriction base="xs:string">
4012	        <xs:pattern value="allowed"/>
4013	        <xs:pattern value="disallowed"/>
4014	        <xs:pattern value=".+"/>
4015	      </xs:restriction>
4016	     </xs:simpleType>

4018	    <!-- CONTROL TYPE -->

4020	    <xs:complexType name="controls-type">
4021	      <xs:sequence>
4022	        <xs:element name="mute"
4023	          type="xs:boolean" minOccurs="0"/>
4024	        <xs:element name="pause-video"
4025	          type="xs:boolean" minOccurs="0"/>

4027	        <xs:element name="gain"
4028	          type="gain-type" minOccurs="0"/>
4029	        <xs:element name="video-layout"
4030	          type="video-layout-type" default="single-view" minOccurs="0"/>
4031	        <xs:any namespace="##other" processContents="lax"
4032	          minOccurs="0" maxOccurs="unbounded"/>
4033	      </xs:sequence>
4034	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4035	    </xs:complexType>

4037	    <!-- GAIN TYPE -->

4039	    <xs:simpleType name="gain-type">
4040	      <xs:restriction base="xs:integer">
4041	        <xs:minInclusive value="-127"/>
4042	        <xs:maxInclusive value="127"/>
4043	      </xs:restriction>
4044	    </xs:simpleType>

4046	    <!-- VIDEO LAYOUT TYPE -->

4048	    <xs:simpleType name="video-layout-type">
4049	      <xs:restriction base="xs:string">
4050	        <xs:pattern value="single-view"/>
4051	        <xs:pattern value="dual-view"/>
4052	        <xs:pattern value="dual-view-crop"/>
4053	        <xs:pattern value="dual-view-2x1"/>
4054	        <xs:pattern value="dual-view-2x1-crop"/>
4055	        <xs:pattern value="quad-view"/>
4056	        <xs:pattern value="multiple-3x3"/>
4057	        <xs:pattern value="multiple-4x4"/>
4058	        <xs:pattern value="multiple-5x1"/>
4059	        <xs:pattern value="automatic"/>
4060	        <xs:pattern value=".+"/>
4061	      </xs:restriction>
4062	    </xs:simpleType>

4064	    <!-- FLOOR INFORMATION TYPE -->

4066	    <xs:complexType name="floor-information-type">
4067	      <xs:sequence>
4068	        <xs:element name="conference-ID"
4069	          type="xs:unsignedLong" minOccurs="0"/>
4070	        <xs:element name="allow-floor-events"
4071	          type="xs:boolean" default="false" minOccurs="0"/>
4072	        <xs:element name="floor-request-handling"
4073	          type="floor-request-handling-type" minOccurs="0"/>
4074	        <xs:element name="conference-floor-policy"
4075	          type="conference-floor-policy" minOccurs="0"/>
4076	        <xs:any namespace="##other" processContents="lax"
4077	          minOccurs="0" maxOccurs="unbounded"/>
4078	      </xs:sequence>
4079	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4080	    </xs:complexType>

4082	    <!-- FLOOR REQUEST TYPE -->

4084	    <xs:simpleType name="floor-request-handling-type">
4085	      <xs:restriction base="xs:string">
4086	        <xs:pattern value="block"/>
4087	        <xs:pattern value="confirm"/>
4088	        <xs:pattern value=".+"/>
4089	      </xs:restriction>
4090	    </xs:simpleType>

4092	    <!-- CONFERENCE FLOOR POLICY -->

4094	    <xs:complexType name="conference-floor-policy">
4095	      <xs:sequence>
4096	        <xs:element name="floor" maxOccurs="unbounded">
4097	          <xs:complexType>
4098	            <xs:sequence>
4099	              <xs:element name="media-label"
4100	                type="xs:string" minOccurs="1" maxOccurs="unbounded"/>
4101	              <xs:element name="algorithm"
4102	                type="algorithm-type" minOccurs="0"/>
4103	              <xs:element name="max-floor-users"
4104	                type="xs:nonNegativeInteger" minOccurs="0"/>
4105	              <xs:element name="moderator-id"
4106	                type="xs:nonNegativeInteger" minOccurs="0"/>
4107	                <xs:any namespace="##other" processContents="lax"
4108	                  minOccurs="0" maxOccurs="unbounded"/>
4109	            </xs:sequence>
4110	            <xs:attribute name="id" type="xs:string" use="required"/>
4111	            <xs:anyAttribute namespace="##any" processContents="lax"/>
4112	          </xs:complexType>
4113	        </xs:element>
4114	      </xs:sequence>
4115	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4116	    </xs:complexType>

4118	    <!-- ALGORITHM TYPE -->

4120	    <xs:simpleType name="algorithm-type">
4121	      <xs:restriction base="xs:string">
4122	        <xs:pattern value="moderator-controlled"/>
4123	        <xs:pattern value="FCFS"/>
4124	        <xs:pattern value="random"/>
4125	        <xs:pattern value=".+"/>
4126	      </xs:restriction>
4127	    </xs:simpleType>

4129	    <!-- USER ADMISSION POLICY TYPE -->

4131	    <xs:simpleType name="user-admission-policy-type">
4132	      <xs:restriction base="xs:string">
4133	        <xs:pattern value="closedAuthenticated"/>
4134	        <xs:pattern value="openAuthenticated"/>
4135	        <xs:pattern value="anonymous"/>
4136	        <xs:pattern value=".+"/>
4137	      </xs:restriction>
4138	    </xs:simpleType>

4140	    <!-- JOIN HANDLING TYPE -->

4142	    <xs:simpleType name="join-handling-type">
4143	      <xs:restriction base="xs:string">
4144	        <xs:pattern value="block"/>
4145	        <xs:pattern value="confirm"/>
4146	        <xs:pattern value="allow"/>
4147	        <xs:pattern value="authenticate"/>
4148	        <xs:pattern value="directed-operator"/>
4149	        <xs:pattern value=".+"/>
4150	       </xs:restriction>
4151	    </xs:simpleType>

4153	   <!-- DENY USER LIST TYPE -->

4155	    <xs:complexType name="deny-users-list-type">
4156	      <xs:sequence>
4157	        <xs:element name="target" minOccurs="0" maxOccurs="unbounded">
4158	          <xs:complexType>
4159	            <xs:attribute name="uri" use="required" type="xs:anyURI"/>
4160	            <xs:anyAttribute namespace="##any" processContents="lax"/>
4161	          </xs:complexType>
4162	        </xs:element>
4163	        <xs:any namespace="##other" processContents="lax"
4164	          minOccurs="0" maxOccurs="unbounded"/>
4165	      </xs:sequence>
4166	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4167	    </xs:complexType>

4169	     <!-- ALLOWED USERS LIST TYPE -->

4171	    <xs:complexType name="allowed-users-list-type">
4172	      <xs:sequence>
4173	        <xs:element name="target" type="target-type"
4174	          minOccurs="0" maxOccurs="unbounded">
4175	        </xs:element>
4176	        <xs:element name="persistent-list"
4177	          type="persistent-list-type"
4178	          minOccurs="0"/>
4179	        <xs:any namespace="##other" processContents="lax"
4180	          minOccurs="0" maxOccurs="unbounded"/>
4181	      </xs:sequence>
4182	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4183	    </xs:complexType>

4185	    <!-- PERSISTENT LIST TYPE -->

4187	    <xs:complexType name="persistent-list-type">
4188	      <xs:sequence>
4189	        <xs:element name="user" minOccurs="0" maxOccurs="unbounded">
4190	          <xs:complexType>
4191	            <xs:sequence>
4192	              <xs:element name="email" type="xs:string"
4193	                minOccurs="0" maxOccurs="unbounded"/>
4194	              <xs:any namespace="##other" processContents="lax"
4195	                minOccurs="0" maxOccurs="unbounded"/>
4196	            </xs:sequence>
4197	            <xs:attribute name="name"
4198	              use="required" type="xs:anyURI"/>
4199	            <xs:attribute name="nickname"
4200	              use="required" type="xs:string"/>
4201	            <xs:attribute name="id"
4202	              use="required" type="xs:string"/>
4203	            <xs:anyAttribute namespace="##any" processContents="lax"/>
4204	          </xs:complexType>
4205	        </xs:element>
4206	        <xs:any namespace="##other" processContents="lax"
4207	          minOccurs="0" maxOccurs="unbounded"/>
4208	      </xs:sequence>
4209	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4210	    </xs:complexType>

4212	    <!-- TARGET TYPE -->

4214	    <xs:complexType name="target-type">
4215	      <xs:attribute name="uri" use="required"
4216	        type="xs:anyURI"/>
4217	      <xs:attribute name="method" use="required"
4218	        type="method-type"/>

4220	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4221	    </xs:complexType>

4223	    <!-- METHOD TYPE -->

4225	    <xs:simpleType name="method-type">
4226	      <xs:restriction base="xs:string">
4227	        <xs:pattern value="dial-in"/>
4228	        <xs:pattern value="dial-out"/>
4229	        <xs:pattern value="refer"/>
4230	        <xs:pattern value=".+"/>
4231	      </xs:restriction>
4232	    </xs:simpleType>

4234	    <!-- ANONYMITY TYPE -->

4236	    <xs:simpleType name="provide-anonymity-type">
4237	      <xs:restriction base="xs:string">
4238	        <xs:pattern value="private"/>
4239	        <xs:pattern value="semi-private"/>
4240	        <xs:pattern value="hidden"/>
4241	        <xs:pattern value=".+"/>
4242	      </xs:restriction>
4243	    </xs:simpleType>

4245	    <!-- MIXER TYPE -->

4247	    <xs:complexType name="mixer-type">
4248	      <xs:sequence>
4249	        <xs:element name="controls" type="controls-type"
4250	          minOccurs="0" maxOccurs="unbounded"/>
4251	        <xs:any namespace="##other" processContents="lax"
4252	          minOccurs="0" maxOccurs="unbounded"/>
4253	      </xs:sequence>
4254	      <xs:attribute name="name" type="mixer-name-type"
4255	        use="required"/>
4256	      <xs:anyAttribute namespace="##any" processContents="lax"/>
4257	    </xs:complexType>

4259	    <!-- MIXER NAME TYPE -->

4261	    <xs:simpleType name="mixer-name-type">
4262	      <xs:restriction base="xs:string">
4263	        <xs:pattern value="VideoIn"/>
4264	        <xs:pattern value="VideoOut"/>
4265	        <xs:pattern value="AudioOut"/>
4266	        <xs:pattern value="AudioIn"/>
4267	        <xs:pattern value=".+"/>

4269	      </xs:restriction>
4270	    </xs:simpleType>

4272	  </xs:schema>

4274	Authors' Addresses

4276	   Oscar Novo
4277	   Ericsson
4278	   Hirsalantie 11
4279	   Jorvas  02420
4280	   Finland

4282	   Email: Oscar.Novo@ericsson.com

4284	   Gonzalo Camarillo
4285	   Ericsson
4286	   Hirsalantie 11
4287	   Jorvas  02420
4288	   Finland

4290	   Email: Gonzalo.Camarillo@ericsson.com

4292	   David P. Morgan
4293	   Fidelity Investments
4294	   82 Devonshire St, MZ V3C
4295	   Boston, MA  02109-3614
4296	   USA

4298	   Email: Dave.Morgan@fmr.com

4300	   Jari Urpalainen
4301	   Nokia
4302	   Itamerenkatu 11-13
4303	   Helsinki  00180
4304	   Finland

4306	   Phone: +358 7180 37686
4307	   Email: jari.urpalainen@nokia.com