datatracker.ietf.org
Sign in
Version 5.6.2.p3, 2014-07-31
Report a bug

Indication of Message Composition for Instant Messaging
RFC 3994

Document type: RFC - Proposed Standard (February 2005; No errata)
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 3994 (Proposed Standard)
Responsible AD: Ted Hardie
Send notices to: rjsparks@nostrum.com, hisham.khartabil@nokia.com

Network Working Group                                     H. Schulzrinne
Request for Comments: 3994                                   Columbia U.
Category: Standards Track                                   January 2005

        Indication of Message Composition for Instant Messaging

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

   In instant messaging (IM) systems, it is useful to know during an IM
   conversation whether the other party is composing a message; e.g.,
   typing or recording an audio message.  This document defines a new
   status message content type and XML namespace that conveys
   information about a message being composed.  The status message can
   indicate the composition of a message of any type, including text,
   voice, or video.  The status messages are delivered to the instant
   messaging recipient in the same manner as the instant messages
   themselves.

Schulzrinne                 Standards Track                     [Page 1]
RFC 3994                      isComposing                   January 2005

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2.  Terminology and Conventions  . . . . . . . . . . . . . . . . .  3
   3.  Description  . . . . . . . . . . . . . . . . . . . . . . . . .  3
       3.1.  Overview . . . . . . . . . . . . . . . . . . . . . . . .  3
       3.2.  Message Composer Behavior  . . . . . . . . . . . . . . .  4
       3.3.  Status Message Receiver Behavior . . . . . . . . . . . .  5
       3.4.  Message Content  . . . . . . . . . . . . . . . . . . . .  6
       3.5.  Additional Status Information  . . . . . . . . . . . . .  6
   4.  Using the Status Message . . . . . . . . . . . . . . . . . . .  7
   5.  Examples . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
   6.  XML Document Format  . . . . . . . . . . . . . . . . . . . . .  8
       6.1.  XML Schema . . . . . . . . . . . . . . . . . . . . . . .  9
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . .  9
   8.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 10
       8.1.  Content-Type Registration for
             'application/im-iscomposing+xml' . . . . . . . . . . . . 10
       8.2.  URN Sub-Namespace Registration for
             'urn:ietf:params:xml:ns:im-iscomposing'  . . . . . . . . 11
       8.3.  Schema Registration  . . . . . . . . . . . . . . . . . . 11
   9.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 11
   10. References . . . . . . . . . . . . . . . . . . . . . . . . . . 12
       10.1. Normative References . . . . . . . . . . . . . . . . . . 12
       10.2. Informative References . . . . . . . . . . . . . . . . . 12
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 12
   Full Copyright Statement . . . . . . . . . . . . . . . . . . . . . 13

1.  Introduction

   By definition, instant messaging (IM) is message based:  A user
   composes a message by, for example, typing, speaking, or recording a
   video clip.  This message is then sent to one or more recipients.
   Unlike email, instant messaging is often conversational, so the other
   party is waiting for a response.  If no response is forthcoming, a
   participant in an instant messaging conversation may erroneously
   assume either that the communication partner has left or that it is
   her turn to type again, leading to two messages "crossing on the
   wire".

   To avoid this uncertainty, a number of commercial instant messaging
   systems feature an "is-typing" indication sent as soon as one party
   starts typing a message.  In this document, we describe a generalized
   version of this indication, called the isComposing status message.
   As described in Section 3 in more detail, a status message is
   delivered to the instant message recipient in the same manner as are
   the messages themselves.  The isComposing status messages can
   announce the composition of any media type, not just text.  For

Schulzrinne                 Standards Track                     [Page 2]
RFC 3994                      isComposing                   January 2005

   example, it might be used if somebody is recording an audio or video
   clip.  In addition, it can be extended to convey other instant
   messaging user states in the future.  Below, we will call these

[include full document text]