RFC2158 - X.400 Image Body Parts

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　　Network Working Group H. Alvestrand
Request for Comments: 2158 UNINETT
Category: Standards Track January 1998

X.400 Image Body Parts

Status of this Memo

This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (1998). All Rights Reserved.

1. Introduction

This document contains the body parts defined in RFC1495 for
carrying image formats that were originally defined in MIME through
an X.400 system.

It also documents the OIDs assigned to these data formats as FTAM
body parts, which allow the MIME types to be converted to FTAM body
parts; this will probably be more useful than the new body parts
defined here.

2. Newly defined X.400 body parts

2.1. The JPEG body part

The following Extended Body Part is defined for JPEG data streams.
It has no parameters.

jpeg-body-part EXTENDED-BODY-PART-TYPE
DATA OCTET STRING
::= mime-jpeg-body

mime-jpeg-body OBJECT IDENTIFIER ::=
{ mixer-bp-data 3 }

The content is as defined in [MIME].

2.2. The GIF body part

The following Extended Body Part is defined for GIF data streams. It
has no parameters.

gif-body-part EXTENDED-BODY-PART-TYPE
DATA OCTET STRING
::= mime-gif-body

mime-gif-body OBJECT IDENTIFIER ::=
{ mixer-bp-data 4 }

The content is as defined in [MIME].

3. Defined equivalences with MIME types

3.1. image/jpeg - jpeg-body-part

X.400 Body Part: Extended Body Part, OID jpeg-body-part
MIME Content-Type: image/jpeg
Conversion: None

3.2. image/jpeg - FTAM EMA JPEG

X.400 Body Part: FTAM EMA JPEG
MIME Content-Type: image/jpeg
Conversion: None

The OID assigned to JPEG by EMA in [MAWG] is

{ ema objects(2) messaging (2) attachments(1) jpeg-image(6) }

while EMA's OID is

{ joint-iso-ccitt(2) country(16) us(840) organization(1)
ema(113694) }

making the total OID, numeric only

{ 2 16 840 1 113694 2 2 1 6 }

3.3. image/gif - gif-body-part

X.400 Body Part: Extended Body Part, OID gif-body-part
MIME Content-Type: image/gif
Conversion: None

3.4. image/gif - FTAM EMA GIF

X.400 Body Part: FTAM EMA GIF
MIME Content-Type: image/jpeg
Conversion: None

The OID assigned to JPEG by EMA in [MAWG] is

{ ema objects(2) messaging (2) attachments(1) gif-image(4) }

4. Security Considerations

Security issues are not considered in this memo.

5. References

[MIME]
Freed, N., and N. Borenstein, "Multipurpose Internet Mail
Extensions (MIME) Part One: Format of Internet Message Bodies",
RFC2045, November 1996.

[MAWG]
Electronic Messaging Association Message Attachment Working Group
(MAWG): File Transfer Body Part Feasibility Project Guide -
version 1.5.1 - March 1996.

6. Author's Address

Harald Tveit Alvestrand
UNINETT
Postboks 6883 Elgeseter
N-7002 TRONDHEIM

Phone: +47 73 59 70 94
EMail: Harald.T.Alvestrand@uninett.no

7. Full Copyright Statement

Copyright (C) The Internet Society (1998). All Rights Reserved.

This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it
or assist in its implementation may be prepared, copied, published
and distributed, in whole or in part, without restriction of any
kind, provided that the above copyright notice and this paragraph are
included on all such copies and derivative works. However, this
document itself may not be modified in any way, such as by removing
the copyright notice or references to the Internet Society or other
Internet organizations, except as needed for the purpose of
developing Internet standards in which case the procedures for
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followed, or as required to translate it into languages other than
English.

The limited permissions granted above are perpetual and will not be
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This document and the information contained herein is provided on an
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TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
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