RFC 2157 (rfc2157) - Page 1 of 49
Mapping between X
Alternative Format: Original Text Document
Network Working Group H. Alvestrand
Request for Comments: 2157 UNINETT
Category: Standards Track January 1998
Mapping between X.400 and RFC-822/MIME Message Bodies
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.
Table of Contents
1 Introduction ........................................... 2
1.1 Glossary ............................................. 3
2 Basic rules for body part conversion ................... 4
2.1 Generating the IPM Body from MIME .................... 5
2.2 Generating the MIME Body from the IPMS.Body .......... 6
2.3 Mapping the EMA FTBP parameters ...................... 7
2.3.1 Mapping GraphicStrings ............................. 7
2.3.2 Mapping specific parameters ........................ 7
2.3.3 Summary of FTBP elements generated ................. 10
2.4 Information that is lost when mapping ................ 11
3 Encapsulation of body parts ............................ 11
3.1 Encapsulation of MIME in X.400 ....................... 12
3.1.1 FTBP encapsulating body part ....................... 12
3.1.2 BP15 encapsulating body part ....................... 13
3.1.3 Encapsulation using IA5 (HARPOON) .................. 15
3.1.4 Content passing using BP14 ......................... 16
3.2 Encapsulating X.400 Body Parts in MIME ............... 16
3.3 Encapsulating FTBP body parts in MIME ................ 17
4 User control over the gateway choice ................... 18
4.1 Conversion from MIME to X.400 ........................ 18
4.2 Conversion from X.400 to MIME ........................ 20
5 The equivalence registry ............................... 21
5.1 What information one must give about a mapping
..................................................... 21
5.2 Equivalence summary for known X.400 and MIME
Types ................................................ 22
5.3 MIME to X.400 Table .................................. 23
Alvestrand Standards Track
