NAME
Encode::JIS2K - JIS X 0212 (aka JIS 2000) Encodings
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
shiftjisx0213 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 Encode.
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.
* 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
* 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 duplicate mappings.
* 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+cpan at gmail.com>"
COPYRIGHT
Copyright 2002-2023 by Dan Kogai "<dankogai+cpan at gmail.com>".
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
Encode, Encode::JP
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>