RFC 2157 (rfc2157) - Page 2 of 49


Mapping between X



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RFC 2157                X.400/MIME Body Mapping             January 1998


   5.4 X.400 to MIME Table ..................................   23
   5.5 Use of OBJECT IDENTIFIERs and ASN.1 MACROS ...........   24
   6 Defined Equivalences ...................................   26
   6.1 IA5Text - text/plain .................................   26
   6.2 GeneralText - text/plain (ISO-8859) ..................   27
   6.3 BilaterallyDefined - application/octet-stream
       ......................................................   29
   6.4 FTBP  EMA  Unknown  Attachment   -
       application/octet-stream .............................   29
   6.5 MessageBodyPart - message/RFC 822 .....................   30
   6.6 MessageBodyPart - multipart/* ........................   31
   6.7 Teletex - Text/Plain (Teletex) .......................   32
   7 Body parts where encapsulation is recommended ..........   33
   7.1 message/external-body ................................   34
   7.2 message/partial ......................................   35
   7.3 multipart/signed .....................................   35
   7.4 multipart/encrypted ..................................   36
   8 Conformance requirements ...............................   37
   9 Security Considerations ................................   38
   10 Author's Address ......................................   38
   11 Acknowledgements ......................................   38
    References ..............................................   38
    APPENDIXES ..............................................   41
    Appendix A: Escape code normalization ...................   41
    Appendix B: OID Assignments .............................   44
    Appendix  C:  Registration information for the
        Teletex character set ...............................   46
    Appendix  D:  IANA Registration form for new
    mappings ................................................   48
    Full Copyright Statement .................................  49

1.  Introduction

   This document is a companion to [MIXER], which defines the principles
   and translation of headers for interworking between MIME-based RFC-
   822 mail and X.400 mail.

   This document defines how to map body parts of X.400 messages into
   MIME entities and vice versa, including the handling of multipart
   messages and forwarded messages.











Alvestrand                  Standards Track


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