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Additional Media Type Structured Syntax Suffixes
RFC 6839

Internet Engineering Task Force (IETF)                         T. Hansen
Request for Comments: 6839                             AT&T Laboratories
Updates: 3023                                                A. Melnikov
Category: Informational                                        Isode Ltd
ISSN: 2070-1721                                             January 2013

            Additional Media Type Structured Syntax Suffixes

Abstract

   A content media type name sometimes includes partitioned meta-
   information distinguished by a structured syntax to permit noting an
   attribute of the media as a suffix to the name.  This document
   defines several structured syntax suffixes for use with media type
   registrations.  In particular, it defines and registers the "+json",
   "+ber", "+der", "+fastinfoset", "+wbxml" and "+zip" structured syntax
   suffixes, and provides a media type structured syntax suffix
   registration form for the "+xml" structured syntax suffix.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   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).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see 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/rfc6839.

Hansen & Melnikov             Informational                     [Page 1]
RFC 6839             Additional Media Type Suffixes         January 2013

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.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  When to Use These Structured Syntax Suffixes . . . . . . . . .  3
   3.  Initial Structured Syntax Suffix Definitions . . . . . . . . .  4
     3.1.  The +json Structured Syntax Suffix . . . . . . . . . . . .  4
     3.2.  The +ber Structured Syntax Suffix  . . . . . . . . . . . .  5
     3.3.  The +der Structured Syntax Suffix  . . . . . . . . . . . .  6
     3.4.  The +fastinfoset Structured Syntax Suffix  . . . . . . . .  7
     3.5.  The +wbxml Structured Syntax Suffix  . . . . . . . . . . .  9
     3.6.  The +zip Structured Syntax Suffix  . . . . . . . . . . . . 10
   4.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 11
     4.1.  The +xml Structured Syntax Suffix  . . . . . . . . . . . . 11
   5.  Security Considerations  . . . . . . . . . . . . . . . . . . . 12
   6.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 13
     6.1.  Normative References . . . . . . . . . . . . . . . . . . . 13
     6.2.  Informative References . . . . . . . . . . . . . . . . . . 13

Hansen & Melnikov             Informational                     [Page 2]
RFC 6839             Additional Media Type Suffixes         January 2013

1.  Introduction

   [RFC3023] created the +xml suffix convention that can be used when
   defining names for media types whose representation uses XML
   underneath.  That is, they could have been successfully parsed as if
   the media type had been application/xml in addition to their being
   parsed as their media type that is using the +xml suffix.  [RFC6838]
   defines the media type "Structured Syntax Suffix Registry" to be used
   for such structured syntax suffixes.

   A variety of structured syntax suffixes have already been used in
   some media type registrations, in particular "+json", "+der",
   "+fastinfoset", and "+wbxml".  This document defines and registers
   these structured syntax suffixes in the Structured Syntax Suffix
   Registry, along with "+ber" and "+zip".  In addition, this document
   updates [RFC3023] to formally register the "+xml" structured syntax

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