NAME
       Encode::JIS2K - JIS X 0212 (aka JIS 2000) Encodings

INSTALLATION

To install this module type the following:

   perl Makefile.PL
   make
   make test
   make install

SYNOPSIS
         use Encode::JIS2K;
         use Encode qw/encode decode/;
         $euc_2k = encode("euc-jisx0213", $utf8);
         $utf8   = decode("euc-jisx0213", $euc_jp);

ABSTRACT
       This module implements encodings that covers JIS X 0213
       charset (AKA JIS 2000, hence the module name).  Encodings
       supported are as follows.

         Canonical     Alias                                      Description
         --------------------------------------------------------------------
         euc-jisx0213  qr/\beuc.*jp[ \-]?(?:2000|2k)$/i          EUC-JISX0213
                       qr/\bjp.*euc[ \-]?(2000|2k)$/i
                       qr/\bujis[ \-]?(?:2000|2k)$/i
         shiftjisx0123 qr/\bshift.*jis(?:2000|2k)$/i           Shift_JISX0213
                       qr/\bsjisp \-]?(?:2000|2k)$/i

         iso-2022-jp-3
         jis0213-1-raw                         JIS X 0213 plane 1, raw format
         jis0213-2-raw                         JIS X 0213 plane 2, raw format
         --------------------------------------------------------------------

DESCRIPTION
       To find out how to use this module in detail, see the
       Encode manpage.

what is JIS X 0213 anyway?
       Simply put, JIS X 0213 is a rework and reorganization of
       JIS X 0208 and JIS X 0212.  They consist of two 94x94
       planes which roughly corrensponds as follows;

         JIS X 0213 Plane 1 = JIS X 0208 + extension
         JIS X 0213 Plane 2 = JIS X 0212 reorganized + extension

       And here is the character repertoire there of at a glance.

                 # of codepoints     Kuten Ku (rows) used
         --------------------------------------------------------
         JIS X 0208         6,879    1..8,16..83
         JIS X 0213-1       8,762    1..94 (all!)
         JIS X 0212         6,067    2,6..7,9..11,16..77
         JIS X 0213-2       2,436    1,3..5,8,12..15,78..94
         -------------------------------------------------------
         (JIS X0213 Total) 11,197

       JIS X 0213 was designed to extend JIS X 0208 and JIS X
       0212 without being imcompatible to (classic) EUC-JP and
       Shift_JIS.  The following characteristics are as a result
       thereof.

       o JIS X plane 1 is (almost) a superset of JIS X 0208.
         However, with Unicode 3.2.0 the mappings differ in 3
         codepoints.

           Kuten   JIS X 0208 -> Unicode         JIS X 0213 -> Unicode
           --------------------------------------------------------------
           1-1-17  <UFFE3> # FULLWIDTH MACRON    <U203E> # OVERLINE
           1-1-29  <U2014> # EM DASH             <U2015> # HORIZONTAL BAR
           1-1-79  <UFFE5> # FULLWIDTH YEN SIGN  <U00A5> # YEN SIGN

       o By the same token, JIS X 0213 plane 2 contains JIS Dai-4
         Suijun Kanji (JIS Kanji Repertoire Level 4).  This
         allows EUC-JP's G3 to contain both JIS X 0212 and JIS
         0213 plane 2.

         However, JIS X 0212:1990 already contains many of Dai-4
         Suijun Kanji so EUC's G3 is subject to containing dupli-
         cate mappings.

       o Because of Halfwidth Katakana, Shift_JIS mapping has
         been tricky and it is even trickier.  Here is a regex
         that matches Shift_JISX0213 sequence (note: you have to
         "use bytes" to make it work!)

           $re_valid_shifjisx0213 =
             qr/^(?:
                  [\x00-\x7f] |                            # ASCII or
                  [\xa1-\xdf] |                            # JIS X 0201 KANA or
                  [\x81-\x9f\xe0-\xfc][\x40-\x7e\x80-\xfc] # JIS X 0213
                  )+$/xo;

       Note on EUC-JISX0213 (vs. EUC-JP)

       As of Encode-1.64, 'euc-jp' does support euc-jisx0213 for
       decoding.  However, 'euc-jp' in Encode and 'euc-jisx0213'
       differ as follows;

                           euc-jp                   euc-jisx0213
         --------------------------------------------------------------
         Decodes....       (0201-K|0208|0212|0213)  ditto
         Round-Trip  (|0)  (020-K|0208|0212)        JIS X (0201-K|0213)
         Decode Only (|3)  those only found in 0213
                                               those only found in 0212
         --------------------------------------------------------------

AUTHORS
       Dan Kogai <dankogai@dan.co.jp>

COPYRIGHT
       Copyright 2002 by Dan Kogai <dankogai@dan.co.jp>.

       This program is free software; you can redistribute it
       and/or modify it under the same terms as Perl itself.

       See http://www.perl.com/perl/misc/Artistic.html

SEE ALSO
       the Encode manpage, the Encode::JP manpage

       Japanese Graphic Character Set for Information Interchange
       -- Plane 1 http://www.itscj.ipsj.or.jp/ISO-IR/228.pdf

       Japanese Graphic Character Set for Information Interchange
       -- Plane 2 http://www.itscj.ipsj.or.jp/ISO-IR/229.pdf



