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Media Type Specifications and Registration Procedures
RFC 6838

Internet Engineering Task Force (IETF)                          N. Freed
Request for Comments: 6838                                        Oracle
BCP: 13                                                       J. Klensin
Obsoletes: 4288
Category: Best Current Practice                                T. Hansen
ISSN: 2070-1721                                        AT&T Laboratories
                                                            January 2013

         Media Type Specifications and Registration Procedures

Abstract

   This document defines procedures for the specification and
   registration of media types for use in HTTP, MIME, and other Internet
   protocols.

Status of This Memo

   This memo documents an Internet Best Current Practice.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   BCPs is available in 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/rfc6838.

Copyright Notice

   Copyright (c) 2013 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.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Freed, et al.             Best Current Practice                 [Page 1]
RFC 6838                 Media Type Registration            January 2013

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Historical Note  . . . . . . . . . . . . . . . . . . . . .  3
     1.2.  Conventions Used in This Document  . . . . . . . . . . . .  4
   2.  Media Type Registration Preliminaries  . . . . . . . . . . . .  4
   3.  Registration Trees and Subtype Names . . . . . . . . . . . . .  4
     3.1.  Standards Tree . . . . . . . . . . . . . . . . . . . . . .  4
     3.2.  Vendor Tree  . . . . . . . . . . . . . . . . . . . . . . .  6
     3.3.  Personal or Vanity Tree  . . . . . . . . . . . . . . . . .  6
     3.4.  Unregistered x. Tree . . . . . . . . . . . . . . . . . . .  7
     3.5.  Additional Registration Trees  . . . . . . . . . . . . . .  7
   4.  Registration Requirements  . . . . . . . . . . . . . . . . . .  7
     4.1.  Functionality Requirement  . . . . . . . . . . . . . . . .  8
     4.2.  Naming Requirements  . . . . . . . . . . . . . . . . . . .  8
       4.2.1.  Text Media Types . . . . . . . . . . . . . . . . . . .  9
       4.2.2.  Image Media Types  . . . . . . . . . . . . . . . . . . 10
       4.2.3.  Audio Media Types  . . . . . . . . . . . . . . . . . . 10
       4.2.4.  Video Media Types  . . . . . . . . . . . . . . . . . . 10
       4.2.5.  Application Media Types  . . . . . . . . . . . . . . . 11
       4.2.6.  Multipart and Message Media Types  . . . . . . . . . . 11
       4.2.7.  Additional Top-Level Types . . . . . . . . . . . . . . 12
       4.2.8.  Structured Syntax Name Suffixes  . . . . . . . . . . . 12
       4.2.9.  Deprecated Aliases . . . . . . . . . . . . . . . . . . 13
     4.3.  Parameter Requirements . . . . . . . . . . . . . . . . . . 13
     4.4.  Canonicalization and Format Requirements . . . . . . . . . 14
     4.5.  Interchange Recommendations  . . . . . . . . . . . . . . . 15
     4.6.  Security Requirements  . . . . . . . . . . . . . . . . . . 15
     4.7.  Requirements Specific to XML Media Types . . . . . . . . . 16
     4.8.  Encoding Requirements  . . . . . . . . . . . . . . . . . . 16
     4.9.  Usage and Implementation Non-Requirements  . . . . . . . . 17
     4.10. Publication Requirements . . . . . . . . . . . . . . . . . 18
     4.11. Fragment Identifier Requirements . . . . . . . . . . . . . 18
     4.12. Additional Information . . . . . . . . . . . . . . . . . . 19
   5.  Media Type Registration Procedures . . . . . . . . . . . . . . 19
     5.1.  Preliminary Community Review . . . . . . . . . . . . . . . 19
     5.2.  Submit Request to IANA . . . . . . . . . . . . . . . . . . 20
       5.2.1.  Provisional Registrations  . . . . . . . . . . . . . . 20
     5.3.  Review and Approval  . . . . . . . . . . . . . . . . . . . 21
     5.4.  Comments on Media Type Registrations . . . . . . . . . . . 21

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