NAME

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 <[email protected]>

COPYRIGHT
Copyright 2002 by Dan Kogai <[email protected]>.

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