Media Server Markup Language (MSML)
RFC 5707

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Independent Submission                                         A. Saleem
Request for Comments: 5707                                        Y. Xin
Category: Informational                                          RadiSys
ISSN: 2070-1721                                              G. Sharratt
                                                              Consultant
                                                           February 2010

                  Media Server Markup Language (MSML)

Abstract

   The Media Server Markup Language (MSML) is used to control and invoke
   many different types of services on IP media servers.  The MSML
   control interface was initially driven by RadiSys with subsequent
   significant contributions from Intel, Dialogic, and others in the
   industry.  Clients can use it to define how multimedia sessions
   interact on a media server and to apply services to individuals or
   groups of users.  MSML can be used, for example, to control media
   server conferencing features such as video layout and audio mixing,
   create sidebar conferences or personal mixes, and set the properties
   of media streams.  As well, clients can use MSML to define media
   processing dialogs, which may be used as parts of application
   interactions with users or conferences.  Transformation of media
   streams to and from users or conferences as well as interactive voice
   response (IVR) dialogs are examples of such interactions, which are
   specified using MSML.  MSML clients may also invoke dialogs with
   individual users or with groups of conference participants using
   VoiceXML.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This is a contribution to the RFC Series, independently of any other
   RFC stream.  The RFC Editor has chosen to publish this document at
   its discretion and makes no statement about its value for
   implementation or deployment.  Documents approved for publication by
   the RFC Editor are not a candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc5707.

Saleem, et al.                Informational                     [Page 1]
RFC 5707              Media Server Markup Language         February 2010

IESG Note

   This RFC is not a candidate for any level of Internet Standard.  The
   IETF disclaims any knowledge of the fitness of this RFC for any
   purpose and in particular notes that the decision to publish is not
   based on IETF review for such things as security, congestion control,
   or inappropriate interaction with deployed protocols.  The RFC Editor
   has chosen to publish this document at its discretion.  Readers of
   this document should exercise caution in evaluating its value for
   implementation and deployment.  See RFC 3932 for more information.

Copyright Notice

   Copyright (c) 2010 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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

Table of Contents

   1. Introduction ....................................................4
   2. Glossary ........................................................5
   3. MSML SIP Usage ..................................................6
      3.1. SIP INFO ...................................................7
      3.2. SIP Control Framework ......................................8
   4. Language Structure .............................................15
      4.1. Package Scheme ............................................15
      4.2. Profile Scheme ............................................18
   5. Execution Flow .................................................19
   6. Media Server Object Model ......................................21
      6.1. Objects ...................................................21
      6.2. Identifiers ...............................................23
   7. MSML Core Package ..............................................26
      7.1. <msml> ....................................................26
      7.2. <send> ....................................................26
      7.3. <result> ..................................................27
      7.4. <event> ...................................................27
   8. MSML Conference Core Package ...................................28
      8.1. Conferences ...............................................28
      8.2. Media Streams .............................................29
      8.3. <createconference> ........................................31