One document matched: draft-rfced-info-kim-00.txt

INTERNET-DRAFT          EXPIRES: SEPT 1997               INTERNET-DRAFT
Network Working Group                                        J. P. Kim
Internet Draft                                             S. H.  Choi
Updates : 1557                                               I. S.Choi
Category : Informational                                    S. J. Park
                                                             S. W. Chi
                                          Nat'l Computerization Agency
                                                         December 1996

      Update of Korean Character Encoding for Internet Messages
        <draft-rfced-info-kim-00.txt>


Status of this Memo

   This document is an Internet-Draft.  Internet-Drafts are working
   documents of the Internet Engineering task Force (IETF), its areas,
   and its working groups.  Note that other groups may also distribute
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Abstract
   Since RFC 1557, which is a Korean character encoding for internet
   messages, was distributed in 1993, most mailers have been implemented
   using it. However, it's been reported many occurrences of incompatible
   transfer of Korean mail messages such as broken mail messages.
   Therefore certain features are need to be extended, and ambiguous
   contents must be clarified. This document updates RFC 1557 to resolve
   above matters.
   This memo provides information for the Internet community. This memo
   does not specify an Internet standard of any kind.  Distribution of
   this memo is unlimited.

Introduction

   This document updates the processing method being used to represent
   Korean characters in Internet messages defined by RFC 1557. It can
   be used in encoding or decoding Korean Character in 7bit mail
messages
   only. This document also describes the encoding method for including 
   multipart message and mail header with Korean characters.
   Other text subtypes, rich text and similar forms of text, are beyond
   the scope of this document.

Processing of Multipart message with Korean characters

   According to RFC 1521, it confines available scope to each part in
the 
   Multipart message. That is, in the case of Korean message, the header
   and body encoding of each part must be redefined.

Encoding for mail header with Korean characters

   In the case of mail headers with Korean characters, it is possible to
   encode entire header or only Korean characters. However a single
   token such as file name should be encoded as a whole.

Application of KS C 5601

   KS C 5601 noted in RFC 1557 is confined to only Wanseong code as 
   specified in KS C 5601-1987 and  KS C 5601-1989.



Kim, S. H. Choi & I. S. Choi                                    [Page 1]
Internet Draft         Korean Message Processing          December 1996

Correction of RFC 1557

  Because there is a missing ")" in 40th line of 2nd page of RFC 1557,
  it must be corrected as following :
  segment = SO 1*(one-of-94 one-of-94 SI ; ( Octal, Decimal.) 
  --> segment = SO 1*(one-of-94 one-of-94) SI  ; ( Octal, Decimal.)

Examples

* Hex digits in [ ] in the examples represent 2 byte Korean characters

   1. Processing of Multipart message with Korean characters

      Content-Type: multipart/mixed; boundary="MAIL-boundary"
      This is a multipart message in MIME format.

      --MAIL-boundary
      Content-Type: text/plain; charset=iso-2022-kr
      Content-Transfer-Encoding: 7bit

      <ESC>$)C<SO>@L0M@:<SI> <SO>C9<SI><CRLF>
      <SO>9xB0<SI> <SO>:;9.@T4O4Y<SI>.

      ...... (skip)

      --MAIL-boundary
      Content-Type: text/plain; charset=iso-2022-kr
      Content-Transfer-Encoding: 7bit

      <ESC>$)C<SO>@L0M@:<SI> <SO>5N<SI><CRLF>
      <SO>9xB0<SI> <SO>:;9.@T4O4Y<SI>.

       ...... (skip)

       --MAIL-boundary
       Content-Type: image/gif
       Content-Transfer-Encoding: Base64
       Content-Disposition: attachment; filename="test.gif"
       ...... (skip)

       --MAIL-boundary--

   2. Encoding for mail header with Korean characters

     1) Subject: [C7D1B1DBC0CC20B5E9BEEEC0D6B4C220C6EDC1F6]
     
        Subject: =?EUC-KR?B?x9Gx28DMILXpvu7A1rTCIMbtwfY=?=
        Subject: =?EUC-KR?B?x9Gx28DMIA==?= =?EUC-KR?B?tem+7sDWtMIg?=
                 =?EUC-KR?B?xu3B9g==?=

     2) Subject: Internet [C6EDC1F6B8A620BAB8B3C0B4CFB4D9]
                 
        Subject: =?EUC-KR?B?SW50ZXJuZXQgxu3B9rimILq4s8C0z7TZ?=
        Subject: Internet =?EUC-KR?B?xu3B9rimILq4s8C0z7TZ?=


Kim, S. H. Choi & I. S. Choi                                    [Page 2]
Internet Draft         Korean Message Processing          December 1996

     3) Subject: Internet[C0B8B7CE20C6EDC1F6B8A6]
 
        Subject: =?EUC-KR?B?SW50ZXJuZXTAuLfOIMbtwfa4pg==?=

     4) Subject: [B4E7BDC5C0C720452D6D61696C20C1D6BCD2B8A620]
                [BECBB7C1C1D6BDCABDC3BFC0]
                 
         Subject: =?EUC-KR?B?tOe9xcDHIEUtbWFpbCDB1rzS?=
                  =?EUC-KR?B?uKYgvsu3wcHWvcq9w7/A?=
         Subject: =?EUC-KR?B?tOe9xcDH?= E-mail
                  =?EUC-KR?B?wda80rimIL7Lt8HB1r3KvcO/wA==?=
 
      5) Subject: [BBE7BFEBC1DFC0CE204F53]
                 [C8AFB0E6C0BB20B1E2C1D8C0B8B7CE]
         Content-Disposition: attachment; 
               filename="[B9AEBCAD3030312E747874]"

         Subject: =?EUC-KR?B?u+e/68HfwM4gT1PIr7DmwLsg?=
                  =?EUC-KR?B?seLB2MC4t84uLi4=?=
         Content-Disposition: attachment;
               filename="=?EUC-KR?B?ua68rTAwMS50eHQ=?="

 
References

   [ASCII] American National Standards Institute, "Coded character set
           -- 7-bit American national standard code for information
           interchange", ANSI X3.4-1968
   [ISO2022] International Organization for Standardization (ISO),
             "Information processing -- ISO 7-bit and 8-bit coded
             character sets -- Code extension techniques",
             International Standard, 1986, Ref. No. ISO 2022-1986 (E).
   [KSC5601] Korea Industrial Standards Association, "Code for
             Information Interchange (Hangul and Hanja)," Korean
             Industrial Standard, 1987, Ref. No. KS C 5601-1987.
   [EUC-KR] Korea Industrial Standards Association, "Hangul Unix
             Environment," Korean Industrial Standard, 1992, Ref. No.
             KS C 5861-1992.
   [RFC822] Crocker, D., "Standard for the Format of ARPA Internet
             Text Messages", STD 11, RFC 822, UDEL, August 1982.
   [MIME1] Borenstein, N., and N. Freed, "MIME (Multipurpose
            Internet Mail Extensions): Part One: Mechanisms for
            Specifying and Describing the Format of Internet Message
            Bodies", RFC 1521, Bellcore, Innosoft, September 1993.
   [MIME2] Moore, K., "MIME (Multipurpose Internet Mail Extensions)
            Part Two: Message Header Extensions for Non-ASCII Text",
            RFC 1522, University of Tennessee, September 1993.

Security Considerations

   Security issues are not discussed in this memo.

Kim, S. H. Choi & I. S. Choi                                    [Page 3]
Internet Draft         Korean Message Processing          December 1996

Acknowledgments

   The authors wish to thank all the people who assisted in writing this
   document. We especially thank all the members of Internet Hangul
   Working Group coordinated by National Computerization Agency and
   the concerned in the han.comp.hangul and han.comp.mail newsgroup 
   who provided valuable comments.

Author's Addresses

   Jongpyo Kim
   National Computerization Agency
   Information Technology Research Division
   Yong-In, 449-840, Republic of Korea
   Phone : +82-331-260-2558
   Fax : +82-331-262-2752
   EMail : jpkim@nca.or.kr

   Seungho Choi
   Hangul & Computer Co., Ltd
   Division of Communications 
   Seoul, 150-037, Republic of Korea
   Phone : +82-2-639-8315
   Fax : +82-2-631-3757
   EMail : sanjose@hnc.co.kr

   Insook Choi 
   Microsoft
   Seoul, 135-777, Republic of Korea
   Phone : +82-2-531-4747
   Fax : +82-2-531-4563
   EMail : ischoi@microsoft.com

   Sungjae Park
   Hyundai Information Technology
   Aminet Development Department
   Seoul, 110-052, Republic of Korea
   Phone : +82-2-398-4728
   Fax : +82-2-398-4683
   EMail : Eureka@aminet.co.kr

   Songwon Chi
   Daou Technology, Inc
   Netscape Team
   Seoul, 135-080, Republic of Korea
   Phone : +82-2-3450-4676
   Fax : +82-2-558-2907
   EMail : swchi@daou.co.kr

INTERNET-DRAFT          EXPIRES SEPTEMBER 1997    INTERNET-DRAFT