SIP for Instant Messaging and Presence Leveraging Extensions (simple)
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 Charter
 Last Modified: 2009-03-30

 Current Status: Active Working Group

 Chair(s):
     Hisham Khartabil  <hisham.khartabil@gmail.com>
     Ben Campbell  <ben@nostrum.com>

 Real-time Applications and Infrastructure Area Director(s):
     Robert Sparks  <rjsparks@nostrum.com>
     Cullen Jennings  <fluffy@cisco.com>

 Real-time Applications and Infrastructure Area Advisor:
     Robert Sparks  <rjsparks@nostrum.com>

 Technical Advisor(s):
     Jon Peterson  <jon.peterson@neustar.biz>

 Mailing Lists: 
     General Discussion:simple@ietf.org
     To Subscribe:      simple-request@ietf.org
         In Body:       subscribe
     Archive:           http://www.ietf.org/mail-archive/web/simple/index.html

Description of Working Group:

This working group focuses on the application of the Session Initiation
Protocol (SIP, RFC 3261) to the suite of services collectively known 
as 
instant messaging and presence (IMP). The IETF has committed to 
producing an interoperable standard for these services compliant to 
the 
requirements for IM outlined in RFC 2779 (including the security and 
privacy requirements there) and in the Common Presence and Instant 
Messaging (CPIM) specification, developed within the IMPP working 
group. As the most common services for which SIP is used share quite a 
bit in common with IMP, the adaptation of SIP to IMP seems a natural 
choice given the widespread support for (and relative maturity
of) the SIP standard.

The primary work of this group will be to generate:

1. A proposed standard SIP extension documenting the transport of 
Instant Messages in SIP, compliant to the requirements for IM outlined 
in RFC 2779, CPIM and in BCP 41 (so that the transport implications of 
the extension with respect to network congestion are considered in the 
design).

2. A proposed standard SIP event package and any related protocol 
mechanisms used to support presence, compliant to the requirements for 
presence outlined in RFC 2779 and CPIM.

3. An architecture for the implementation of a traditional 
buddylist-based instant messaging and presence application with SIP. 
Included might be new mechanisms for message confirmation delivery, 
indications for when a party is in the process of typing a message, 
secure buddylist manipulation operations, and the extension of the 
CPIM 
presence format to describe typical IM states. Each of these 
mechanisms 
will be consistent with a SIP-based architecture, as well as meeting 
the constraints otherwise described in this charter.

All SIMPLE proposals fulfilling these goals must document the mappings 
of their operation to CPIM. Any SIP extensions proposed in the course 
of this development will, after a last call process, be transferred to 
the SIP WG for consideration as formal SIP extensions.

The working group will work within the framework for presence and IM 
described in RFC 2778. The extensions it defines must also be 
compliant 
with the SIP processes for extensions. The group cannot modify 
baseline 
SIP behavior or define a new version of SIP for IM and presence. If 
the 
group determines that any capabilities requiring an extension to SIP 
are needed, the group will seek to define such extensions within the 
SIP working group, and then use them here.

The working group will operate in close cooperation with the IMPP 
working group, which will be completing CPIM in parallel. The working 
group will also cooperate with any other groups defined to standardize 
other presence and IM systems, to ensure maximum sharing of 
information 
and avoid reinvention of the wheel. The working group will cooperate 
with the SIP working group, soliciting reviews to ensure its 
extensions 
meet SIPs requirements. The working group will also collaborate with 
the SIP WG to ensure consistent operation of the SUBSCRIBE and NOTIFY 
methods across the other applications being defined for its use.

 Goals and Milestones:

   Done         Submission of event package for presence to IESG for 
                publication as Proposed Standard 

   Done         Submission of watcher information drafts to IESG for 
                publication as Proposed Standards 

   Done         Submission of proposed event list mechanism to the SIP working 
                group 

   Done         Submission of requirements for event publishing to the IESG for 
                publication as Proposed Standard 

   Done         Submission of proposed mechanism for event publishing to the 
                SIP working group 

   Done         Submission of SIMPLE PIDF profile to IESG for publication as 
                Proposed Standard 

   Done         Submission of base XCAP draft to IESG for publication as 
                Proposed Standard 

   Done         Submission of Partial Notification mechanism to IESG for 
                publication as a Proposed Standard 

   Done         Submission of indication of instant message preparation using 
                SIP to IESG for publication as a Proposed Standard 

   Done         Submission of XCAP usage for manipulation of presence document 
                content 

   Done         Submission of XCAP usage for setting presence authorization to 
                IESG for publication as Proposed Standard 

   Done         Submission of Filtering mechanisms to IESG for publication as a 
                Proposed Standard 

   Done         Submission of instant messaging session draft to IESG for 
                publication as a Proposed Standard 

   Done         Submission of instant messaging session relay drafts to IESG 
                for publication as Proposed Standards 

   Feb 2007       Submission of proposed mechanisms meeting the advanced 
                messaging requirements to the IESG or appropriate working group 

   Feb 2007       Submission of XCAP event package to IESG or appropriate working 
                group targeting publication as Proposed Standard 

   Feb 2007       Submission of an Instant Message Disposition Notification 
                mechanism to the IESG for publication as a Proposed Standard 

   Mar 2007       Submission of a performance and scalability analysis of the 
                SIMPLE presence mechanisms to the IESG for publication as 
                Informational 

   Jun 2007       Submission of SIMPLE protocol annotated overview draft to IESG 
                for publication as Informational 

   Aug 2007       Submission of proposed mechanisms for initiating and managing 
                Instant Message group chat to the IESG for publication as 
                Proposed Standard 

   Aug 2007       Conclusion of SIMPLE 

   Dec 2009       Submission of additional connection models for MSRP to IESG for 
                Proposed Standard 


 Internet-Drafts:

Posted Revised         I-D Title   <Filename>
------ ------- --------------------------------------------
Feb 2005 Jun 2009   <draft-ietf-simple-xcap-diff-13.txt>
                An Extensible Markup Language (XML) Document Format for 
                Indicating A Change in XML Configuration Access Protocol (XCAP) 
                Resources 

Feb 2007 Jul 2009   <draft-ietf-simple-interdomain-scaling-analysis-07.txt>
                Presence Interdomain Scaling Analysis for SIP/SIMPLE 

Jun 2007 Mar 2009   <draft-ietf-simple-chat-04.txt>
                Multi-party Chat Using the Message Session Relay Protocol 
                (MSRP) 

Jul 2007 Mar 2009   <draft-ietf-simple-simple-05.txt>
                SIMPLE made Simple: An Overview of the IETF Specifications for 
                Instant Messaging and Presence using the Session Initiation 
                Protocol (SIP) 

Feb 2008 Jul 2009   <draft-ietf-simple-intradomain-federation-04.txt>
                Models for Intra-Domain Presence and Instant Messaging (IM) 
                Bridging 

Feb 2009 Jan 2009   <draft-ietf-simple-msrp-acm-00.txt>
                An Alternative Connection Model for the Message Session Relay 
                Protocol (MSRP) 

 Request For Comments:

  RFC   Stat Published     Title
------- -- ----------- ------------------------------------
RFC3856Standard  Aug 2004    A Presence Event Package for the Session Initiation 
                       Protocol (SIP) 

RFC3857Standard  Aug 2004    A Watcher Information Event Template-Package for the 
                       Session Initiation Protocol (SIP) 

RFC3858Standard  Aug 2004    An Extensible Markup Language (XML) Based Format for 
                       Watcher Information 

RFC3994Standard  Feb 2005    Indication of Message Composition for Instant Messaging 

RFC4481 PS   Jul 2006    Timed Presence Extensions to the Presence Information 
                       Data Format (PIDF) to Indicate Status Information for 
                       Past and Future Time Intervals 

RFC4480 PS   Jul 2006    RPID: Rich Presence Extensions to the Presence 
                       Information Data Format (PIDF) 

RFC4482 PS   Jul 2006    CIPID: Contact Information in Presence Information Data 
                       Format 

RFC4479 PS   Jul 2006    A Data Model for Presence 

RFC4662 PS   Aug 2006    A Session Initiation Protocol (SIP) Event Notification 
                       Extension for Resource Lists 

RFC4661 PS   Sep 2006    An Extensible Markup Language (XML) Based Format for 
                       Event Notification Filtering 

RFC4660 PS   Sep 2006    Functional Description of Event Notification Filtering 

RFC4825 PS   May 2007    The Extensible Markup Language (XML) Configuration 
                       Access Protocol (XCAP) 

RFC4826 PS   May 2007    Extensible Markup Language (XML) Formats for 
                       Representing Resource Lists 

RFC4827 PS   May 2007    An Extensible Markup Language (XML) Configuration Access 
                       Protocol (XCAP) Usage for Manipulating Presence Document 
                       Contents 

RFC4976 PS   Sep 2007    Relay Extensions for the Message Sessions Relay Protocol 
                       (MSRP) 

RFC4975 PS   Sep 2007    The Message Session Relay Protocol (MSRP) 

RFC5025 PS   Dec 2007    Presence Authorization Rules 

RFC5264 PS   Sep 2008    Publication of Partial Presence Information 

RFC5263Standard  Sep 2008    Session Initiation Protocol (SIP) extension for Partial 
                       Notification of Presence Information 

RFC5262 PS   Sep 2008    Presence Information Data format (PIDF) Extension for 
                       Partial Presence 

RFC5261 PS   Sep 2008    An Extensible Markup Language (XML) Patch Operations 
                       Framework Utilizing XML Path Language (XPath) Selectors 

RFC5196 PS   Sep 2008    Session Initiation Protocol (SIP) User Agent Capability 
                       Extension to Presence Information Data Format (PIDF) 

RFC5438 PS   Feb 2009    Instant Message Disposition Notification (IMDN)