2.1.3 Content Negotiation (conneg)

NOTE: This charter is a snapshot of the 46th IETF Meeting in Washington, DC. It may now be out-of-date. Last Modified: 18-Oct-99


E. Hardie <hardie@equinix.com>

Applications Area Director(s):

Keith Moore <moore@cs.utk.edu>
Patrik Faltstrom <paf@swip.net>

Applications Area Advisor:

Keith Moore <moore@cs.utk.edu>


A. Mutz <andy_mutz@hp.com>
G. Klyne <GK@ACM.ORG>

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Description of Working Group:

A number of Internet application protocols need to indicate recipient capabilities, characteristics, and preferences when the resources they handle can vary in form. This working group will finalize registration procedures for distinguishing attributes which cause the media delivered to vary in form. The registration of these "media features" will provide a supplement to the MIME registration of media types and enable the development of a cross-protocol vocabulary for exchanging information on recipient capabilities, characteristics, and preferences. Since these distinguishing attributes commonly occur in related sets, this working group will also describe at least one method for referring to composite media feature sets. Experimental methods for using these features and feature sets within specific protocol contexts may be developed within this group or within the groups standardizing the relevant protocols.

The working group is aware of applications which desire to negotiate what content is delivered as well as the form in which it is delivered. As much as possible, the group will endeavor to create a framework for exchange sturdy enough to handle the later addition of this type of negotiation. It will not, however, address this need directly nor will it limit its design choices based on the possible later addition of this negotiation.

Goals and Milestones:

Aug 99


Submission of W3C CCPP crosswalk to IESG for consideration as Informational

Aug 99


Submit Revised version of Content-Features draft

Aug 99


Submit Revised version of Composite Media Features

Sep 99


Submission of Type feature registration to IESG for consideration as a Proposed Standard.

Oct 99


Submission of Content-Features to IESG for consideration as a Proposed Standard.

Oct 99


Submission of Composite Media to IESG for consideration as a Proposed Standard.

Nov 99


Group enters FIN_WAIT


Request For Comments:







Media Features for Display, Print, and Fax



Media Feature Tag Registration Procedure



A Syntax for Describing Media Feature Sets



Protocol-independent content negotiation framework

Current Meeting Report

None received.


None received.