Domain Name System Media Types
RFC 4027

Document Type RFC - Informational (May 2005; No errata)
Was draft-josefsson-mime-dns (individual in app area)
Last updated 2013-03-02
Stream IETF
Formats plain text pdf html
Stream WG state (None)
Consensus Unknown
Document shepherd No shepherd assigned
IESG IESG state RFC 4027 (Informational)
Telechat date
Responsible AD Ted Hardie
Send notices to (None)
Network Working Group                                       S. Josefsson
Request for Comments: 4027                                    April 2005
Category: Informational

                     Domain Name System Media Types

Status of This Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

   This document registers the media types application/dns and text/dns
   in accordance with RFC 2048.  The application/dns media type is used
   to identify data on the detached Domain Name System (DNS) format
   described in RFC 2540.  The text/dns media type is used to identify
   master files as described in RFC 1035.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  1
   2.  MIME Type Registration of application/dns  . . . . . . . . . .  2
   3.  MIME Type Registration of text/dns . . . . . . . . . . . . . .  3
   4.  Security Considerations  . . . . . . . . . . . . . . . . . . .  4
   5.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . .  4
   6.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . .  4
   A.  Disclaimer and License . . . . . . . . . . . . . . . . . . . .  5
       Normative References . . . . . . . . . . . . . . . . . . . . .  5
       Informative References . . . . . . . . . . . . . . . . . . . .  5
       Author's Address . . . . . . . . . . . . . . . . . . . . . . .  5
       Full Copyright Statements. . . . . . . . . . . . . . . . . . .  6

1.  Introduction

   Domain Name System (DNS) [1] information is traditionally stored in
   text files, so-called master files or zone files.  The format is
   described in section 5 of RFC 1035 [2].

   DNS data can also be stored in a "detached" format, intended for
   archiving purposes, described in RFC 2540 [4].

Josefsson                    Informational                      [Page 1]
RFC 4027             Domain Name System Media Types           April 2005

   This document registers MIME media types for the two data formats,
   with the registration procedures described in RFC 2048 [3].

2.  MIME Type Registration of application/dns

   To: ietf-types@iana.org
   Subject: Registration of MIME media type application/dns

   MIME media type name: application

   MIME subtype name: dns

   Required parameters: None.

   Optional parameters: None.

   Encoding considerations: The data format is binary, and data must be
   transfered unmodified.  Using encodings intended for textual parts is
   not recommended.

   Security considerations: This media type identifies content as being
   detached DNS information, as documented in RFC 2540 [4].  This data
   may be security relevant as per RFC 2538 [7] or may be secured
   information as per RFC 2535 [6].  Securing the content further may be
   done with standard techniques, such as OpenPGP [5] or CMS [9], but
   this is outside of the scope here.  Further security assessments are
   not available at this point.

   Interoperability considerations: The encoding of detached DNS
   information is, unlike textual master files, well defined.  No
   further interoperability considerations are known.

   Published specification: The format of data that could be tagged with
   this media type is documented in RFC 2540 [4].

   Applications that use this media type: DNS-related software,
   including software storing and using certificates stored in DNS.

   Additional information:
     Magic number(s): None.
     File extension(s): Unknown.
     Macintosh File Type Code(s): Unknown.

   Person & email address to contact for further information:

   Simon Josefsson simon@josefsson.org

   Intended usage: LIMITED USE

Josefsson                    Informational                      [Page 2]
RFC 4027             Domain Name System Media Types           April 2005

   Author/change controller: simon@josefsson.org

3.  MIME Type Registration of text/dns

   To: ietf-types@iana.org
   Subject: Registration of MIME media type text/dns

   MIME media type name: text

   MIME subtype name: dns

   Required parameters: None.

   Optional parameters: None.

   Encoding considerations: The data is textual and should be transfered
   in a line-oriented mode.  Text literals may contain CRLF within the
   text.  Binary transport is possible between systems that use the same
   end-of-line conventions.  Master files are in general ASCII, but
   non-ASCII octet values may occur and are treated as opaque values by
   DNS software (compare RFC 1035, section 5).  The master file format
   permits encoding arbitrary octet values by using the "\DDD" encoding.
Show full document text