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 RFC 1495 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].
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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
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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",
RFC 2045, 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
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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 copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English.
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