Media Feature Tag Registration Procedure
RFC 2506

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• 03

Network Working Group                                           K. Holtman
Request for Comments: 2506                                             TUE
BCP: 31                                                            A. Mutz
Category: Best Current Practice                            Hewlett-Packard
                                                                 T. Hardie
                                                                   Equinix
                                                                March 1999

                Media Feature Tag Registration Procedure

Status of this Memo

   This document specifies an Internet Best Current Practices for the
   Internet Community, and requests discussion and suggestions for
   improvements.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (1999).  All Rights Reserved.

ABSTRACT

   Recent Internet applications, such as the World Wide Web, tie
   together a great diversity in data formats, client and server
   platforms, and communities.  This has created a need for media
   feature descriptions and negotiation mechanisms in order to identify
   and reconcile the form of information to the capabilities and
   preferences of the parties involved.

   Extensible media feature identification and negotiation mechanisms
   require a common vocabulary in order to positively identify media
   features.  A registration process and authority for media features is
   defined with the intent of sharing this vocabulary between
   communicating parties. In addition, a URI tree is defined to enable
   sharing of media feature definitions without registration.

   This document defines a registration procedure which uses the
   Internet Assigned Numbers Authority (IANA) as a central registry for
   the media feature vocabulary.

   Please send comments to the CONNEG working group at <ietf-
   medfree@imc.org>.  Discussions of the working group are archived at
   <URL: http://www.imc.org/ietf-medfree/>.

Holtman, et. al.         Best Current Practice                  [Page 1]
RFC 2506        Media Feature Tag Registration Procedure      March 1999

TABLE OF CONTENTS

   1 Introduction .................................................  2
   2 Media feature tag definitions ................................  3
    2.1 Media feature tag purpose .................................  3
    2.2 Media feature tag syntax ..................................  4
    2.3 Media feature tag values ..................................  4
    2.4  ASN.1 identifiers for media feature tags .................  5
   3 Media feature tag registration ...............................  5
    3.1 Registration trees ........................................  6
    3.1.1 IETF tree ...............................................  6
    3.1.2 Global tree .............................................  6
    3.1.3 URL tree ................................................  6
    3.1.4 Additional registration trees ...........................  7
    3.2 Location of registered media feature tag list .............  7
    3.3 IANA procedures for registering media feature tags ........  7
    3.4 Registration template .....................................  7
   4 Security Considerations ...................................... 10
   5 Acknowledgments .............................................. 10
   6 References ................................................... 10
   7 Authors' Addresses ........................................... 11
   8 Full Copyright Statement ..................................... 12

1 Introduction

   Recent Internet applications, such as the World Wide Web, tie
   together a great diversity in data formats, client and server
   platforms, and communities.  This has created a need for media
   feature descriptions and negotiation mechanisms in order to identify
   and reconcile the form of information to the capabilities and
   preferences of the parties involved.

   Extensible media feature identification and negotiation mechanisms
   require a common vocabulary in order to positively identify media
   features.  A registration process and authority for media features is
   defined with the intent of sharing this vocabulary between
   communicating parties. In addition, a URI tree is defined to enable
   sharing of media feature definitions without registration.

   This document defines a registration procedure which uses the
   Internet Assigned Numbers Authority (IANA) as a central registry for
   the media feature vocabulary.

   This document uses the terms MUST, MUST NOT, SHOULD, SHOULD NOT and
   MAY according to usage described in [8].

Holtman, et. al.         Best Current Practice                  [Page 2]
RFC 2506        Media Feature Tag Registration Procedure      March 1999

2 Media feature tag definitions

2.1 Media feature tag purpose

   Media feature tags represent individual and simple characteristics