Encoding Header Field for Internet Messages
RFC 1505

 
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Type RFC - Experimental (August 1993; No errata)
Obsoletes RFC 1154
Last updated 2013-03-02
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Network Working Group                                        A. Costanzo
Request for Comments: 1505                                AKC Consulting
Obsoletes: 1154                                              D. Robinson
                                              Computervision Corporation
                                                              R. Ullmann
                                                             August 1993

              Encoding Header Field for Internet Messages

Status of this Memo

   This memo defines an Experimental Protocol for the Internet
   community.  It does not specify an Internet standard.  Discussion and
   suggestions for improvement are requested.  Please refer to the
   current edition of the "IAB Official Protocol Standards" for the
   standardization state and status of this protocol.  Distribution of
   this memo is unlimited.

IESG Note

   Note that a standards-track technology already exists in this area
   [11].

Abstract

   This document expands upon the elective experimental Encoding header
   field which permits the mailing of multi-part, multi-structured
   messages.  It replaces RFC 1154 [1].

Table of Contents

          1.      Introduction . . . . . . . . . . . . . . . . . . . . 3
          2.      The Encoding Field . . . . . . . . . . . . . . . . . 3
          2.1       Format of the Encoding Field . . . . . . . . . . . 3
          2.2       <count>  . . . . . . . . . . . . . . . . . . . . . 4
          2.3       <keyword>  . . . . . . . . . . . . . . . . . . . . 4
          2.3.1       Nested Keywords  . . . . . . . . . . . . . . . . 4
          2.4       Comments . . . . . . . . . . . . . . . . . . . . . 4
          3.      Encodings  . . . . . . . . . . . . . . . . . . . . . 5
          3.1       Text . . . . . . . . . . . . . . . . . . . . . . . 5
          3.2       Message  . . . . . . . . . . . . . . . . . . . . . 6
          3.3       Hex  . . . . . . . . . . . . . . . . . . . . . . . 6
          3.4       EVFU . . . . . . . . . . . . . . . . . . . . . . . 6
          3.5       EDI-X12 and EDIFACT  . . . . . . . . . . . . . . . 7
          3.6       FS   . . . . . . . . . . . . . . . . . . . . . . . 7
          3.7       LZJU90 . . . . . . . . . . . . . . . . . . . . . . 7
          3.8       LZW  . . . . . . . . . . . . . . . . . . . . . . . 7

Costanzo, Robinson & Ullmann                                    [Page 1]
RFC 1505                 Encoding Header Field               August 1993

          3.9       UUENCODE . . . . . . . . . . . . . . . . . . . . . 7
          3.10      PEM and PEM-Clear  . . . . . . . . . . . . . . . . 8
          3.11      PGP  . . . . . . . . . . . . . . . . . . . . . . . 8
          3.12      Signature  . . . . . . . . . . . . . . . . . . .  10
          3.13      TAR  . . . . . . . . . . . . . . . . . . . . . .  10
          3.14      PostScript . . . . . . . . . . . . . . . . . . .  10
          3.15      SHAR . . . . . . . . . . . . . . . . . . . . . .  10
          3.16      Uniform Resource Locator . . . . . . . . . . . .  10
          3.17      Registering New Keywords . . . . . . . . . . . .  11
          4.      FS (File System) Object Encoding . . . . . . . . .  11
          4.1       Sections . . . . . . . . . . . . . . . . . . . .  12
          4.1.1       Directory  . . . . . . . . . . . . . . . . . .  12
          4.1.2       Entry  . . . . . . . . . . . . . . . . . . . .  13
          4.1.3       File . . . . . . . . . . . . . . . . . . . . .  13
          4.1.4       Segment  . . . . . . . . . . . . . . . . . . .  13
          4.1.5       Data . . . . . . . . . . . . . . . . . . . . .  14
          4.2       Attributes . . . . . . . . . . . . . . . . . . .  14
          4.2.1       Display  . . . . . . . . . . . . . . . . . . .  14
          4.2.2       Comment  . . . . . . . . . . . . . . . . . . .  15
          4.2.3       Type . . . . . . . . . . . . . . . . . . . . .  15
          4.2.4       Created  . . . . . . . . . . . . . . . . . . .  15
          4.2.5       Modified . . . . . . . . . . . . . . . . . . .  15
          4.2.6       Accessed . . . . . . . . . . . . . . . . . . .  15
          4.2.7       Owner  . . . . . . . . . . . . . . . . . . . .  15
          4.2.8       Group  . . . . . . . . . . . . . . . . . . . .  16
          4.2.9       ACL  . . . . . . . . . . . . . . . . . . . . .  16
          4.2.10      Password . . . . . . . . . . . . . . . . . . .  16
          4.2.11      Block  . . . . . . . . . . . . . . . . . . . .  16
          4.2.12      Record . . . . . . . . . . . . . . . . . . . .  17
          4.2.13      Application  . . . . . . . . . . . . . . . . .  17
          4.3       Date Field . . . . . . . . . . . . . . . . . . .  17
          4.3.1       Syntax . . . . . . . . . . . . . . . . . . . .  17
          4.3.2       Semantics  . . . . . . . . . . . . . . . . . .  17
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