INTERNET DRAFT                                                   M. Ohta
draft-ohta-jcs-jis-x-0213-00.txt                Tokyo Institute of Technology
                                                              K. Yasuoka
                                                        Kyoto University
                                                              K. Shibano
                                     Tokyo University of Foreign Studies
                                                            October 1999

      Japanese Character Encoding on the Internet with JIS X 0213

Status of this Memo

   This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
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   http://www.ietf.org/ietf/1id-abstracts.txt

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html.

   This document is a product of JCS (JIS Coded Character Set)
   Committee.

Abstract

   This memo describes six MIME charsets: ISO-2022-JP-3, ISO-2022-JP-3-
   plane1, Shift_JISX0213, Shift_JISX0213-plane1, EUC-JISX0213, EUC-
   JISX0213-plane1 for Japanese text encoding on the Internet with
   characters of ASCII, JIS X 0201, JIS X 0211, JIS X 0208 and JIS X
   0213.

   ISO-2022-JP-3 is the encoding for Japanese text and suitable for use
   in MIME. ISO-2022-JP-3-plane1 is a subset of ISO-2022-JP-3.

   Shift_JISX0213, Shift_JISX0213-plane1, EUC-JISX0213 and EUC-
   JISX0213-plane1 are intended to be used internal to hosts or
   applications and not suitable for use in MIME.

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1. Introduction

   JCS (JIS Coded Character Set) Committee has defined a new CCS (Coded
   Character Set), JIS X 0213 [JISX0213], which mostly is an extension
   of JIS X 0208 [JISX0208], to encode usual Japanese text.

   JIS X 0213 has two planes, plane1 and plane2 and can be subsetted to
   use plane1 only.

   To use characters of JIS X 0213, JCS committee defines 6 new
   charsets: ISO-2022-JP-3, ISO-2022-JP-3-plane1, Shift_JISX0213,
   Shift_JISX0213-plane1, EUC-JISX0213 and EUC-JISX0213-plane1 according
   to the guidelines of BCP 19, RFC 2278 [BCP19].

2. ISO-2022-JP-3

   ISO-2022-JP-3 consists of CCSes of ASCII [ASCII], JIS X 0208
   [JISX0208] and JIS X 0213 [JISX0213].

   The CES (Character Encoding Scheme) of ISO-2022-JP-3 uses escape
   sequences of ISO 2022 [ISO2022] and is like that of ISO-2022-JP
   [RFC1463].

   The full specification of the CES of ISO-2022-JP-3 is given in Annex
   2 of [JISX0213].

   ISO-2022-JP-3 is suitable for use in MIME [MIME1].

   MIBenum of ISO-2022-JP-3 is <to be assigned by IANA>.

3. ISO-2022-JP-3-plane1

   ISO-2022-JP-3-plane1 is identical to ISO-2022-JP-3, except that no
   characters of JIS X 0213 plane 2 can be used.

   MIBenum of ISO-2022-JP-3-plane1 is <to be assigned by IANA>.

4. Shift_JISX0213

   Shift_JISX0213 consists of CCSes of JIS X 0201 [JISX0201], JIS X 0211
   [JISX0211] and JIS X 0213.

   The CES of Shift_JISX0213 is like that of charset Shift_JIS.

   The full specification of the CES of Shift_JISX0213 is given in Annex
   1 of [JISX0213].

   Shift_JISX0213 is not suitable for use in MIME.

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INTERNET DRAFT Japanese Character Encoding with JIS X 0213  October 1999

   MIBenum of Shift_JISX0213 is <to be assigned by IANA>.

5. Shift_JISX0213-plane1

   Shift_JISX0213-plane1 is identical to  Shift_JISX0213, except that no
   characters of JIS X 0213 plane 2 can be used.

   MIBenum of Shift_JISX0213-plane1 is <to be assigned by IANA>.

6. EUC-JISX0213

   EUC-JISX0213 consists of CCSes of ASCII, JIS X 0208, JIS X 0201 Kana
   and JIS X 0213.

   The CES of EUC-JISX0213 is like that of charset EUC-JP.

   The full specification of the CES of EUC-JISX0213 is given in Annex 3
   of [JISX0213].

   EUC-JISX0213 is not suitable for use in MIME.

   MIBenum of EUC-JISX0213 is <to be assigned by IANA>.

7. EUC-JISX0213-plane1

   EUC-JISX0213-plane1 is identical to  EUC-JISX0213, except that no
   characters of JIS X 0213 plane 2 can be used.

   MIBenum of EUC-JISX0213-plane1 is <to be assigned by IANA>.

8. References

   [ASCII] American National Standards Institute, "Coded character set
   -- 7-bit American national standard code for information
   interchange", ANSI X3.4-1986.

   [BCP19] N. Freed, J. Postel, "IANA Charset Registration Procedure",
   RFC2278, January 1998.

   [ISO2022] International Organization for Standardization (ISO),
   "Information processing -- ISO 7-bit and 8-bit coded character sets
   -- Code extension techniques", International Standard, Ref. No. ISO
   2022-1986 (E).

   [JISX0201] Japanese Industrial Standards Committee, "7-bit and 8-bit
   coded character sets for information interchange", JIS X 0201:1997,
   Japanese Standards Association, January 1997.

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INTERNET DRAFT Japanese Character Encoding with JIS X 0213  October 1999

   [JISX0208] Japanese Industrial Standards Committee, "7-bit and 8-bit
   double byte coded KANJI sets for information interchange", JIS X
   0208:1997, Japanese Standards Association, January 1997.

   [JISX0211] Japanese Industrial Standards Committee, "Control
   functions for coded character sets", JIS X 0211:1994, Japanese
   Standards Association, October 1994.

   [JISX0213] Japanese Industrial Standards Committee, "7-bit and 8-bit
   double byte coded extended Kanji sets for information interchange",
   JIS X 0213:2000, Japanese Standards Association, (To be published in
   January 2000, draft accessible through http://jcs.aa.tufs.ac.jp/).

   [MIME1]  N. Freed, N. Borenstein, "Multipurpose Internet Mail
   Extensions (MIME) Part One: Format of Internet Message Bodies", RFC
   2045, November 1996.

   [RFC1468] J. Murai, M. Crispin, E. van der Poel, "Japanese Character
   Encoding for Internet Messages", RFC 1468, June 1993.

9. Security Considerations

   This memo defines MIME charsets, interpretation of which should
   result in text displayed without any side effects such as device
   control, which is believed to be unrelated to security issues.

10. Authors' Addresses

   Masataka Ohta
   Computer Center, Tokyo Institute of Technology
   2-12-1, O-okayama, Meguro-ku, Tokyo 152, JAPAN

   Phone: +81-3-5499-7084
   Fax: +81-3-3729-1940
   EMail: mohta@necom830.hpcl.titech.ac.jp

   Kouichi Yasuoka
   Data Processing Center, Kyoto University
   Kyoto 606-8501, JAPAN

   Phone: +81-75-753-7430
   Fax: +81-75-753-7450
   EMail: yasuoka@kudpc.kyoto-u.ac.jp

   Kouji Shibano
   Information Resource Center

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INTERNET DRAFT Japanese Character Encoding with JIS X 0213  October 1999

   Institute for the Study of Languages and Cultures of Asia and Africa
   Tokyo University of Foreign Studies

   Phone: +81-44-954-7337
   Fax: +81-44-954-7337
   EMail: shibano@aa.tufs.ac.jp

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11. Full Copyright Statement

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