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rfc:rfc2158

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].

Alvestrand Standards Track [Page 1] RFC 2158 X.400 Image Body Parts January 1998

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

Alvestrand Standards Track [Page 2] RFC 2158 X.400 Image Body Parts January 1998

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

Alvestrand Standards Track [Page 3] RFC 2158 X.400 Image Body Parts January 1998

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.
 The limited permissions granted above are perpetual and will not be
 revoked by the Internet Society or its successors or assigns.
 This document and the information contained herein is provided on an
 "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
 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
 MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Alvestrand Standards Track [Page 4]

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