NAME

NAME
Encode::HanExtra - Extra sets of Chinese encodings

VERSION
This document describes version 0.23 of Encode::HanExtra, released
November 10, 2007.

SYNOPSIS
use Encode;

# Traditional Chinese
$euc_tw = encode("euc-tw", $utf8); # loads Encode::HanExtra implicitly
$utf8 = decode("euc-tw", $euc_tw); # ditto

# Simplified Chinese
$gb18030 = encode("gb18030", $utf8); # loads Encode::HanExtra implicitly
$utf8 = decode("gb18030", $gb18030); # ditto

DESCRIPTION
Perl 5.7.3 and later ships with an adequate set of Chinese encodings,
including the commonly used "CP950", "CP936" (also known as "GBK"),
"Big5" (alias for "Big5-Eten"), "Big5-HKSCS", "EUC-CN", "HZ", and
"ISO-IR-165".

However, the numbers of Chinese encodings are staggering, and a complete
coverage will easily increase the size of perl distribution by several
megabytes; hence, this CPAN module tries to provide the rest of them.

If you are using Perl 5.8 or later, Encode::CN and Encode::TW will
automatically load the extra encodings for you, so there's no need to
explicitly write "use Encode::HanExtra" if you are using one of them
already.

ENCODINGS
This version includes the following encoding tables:

Canonical Alias Description
-----------------------------------------------------------------------------
big5-1984 /\b(tca-)?big5-?(19)?84$/i TCA's original Big5-1984
big5-2003 /\b(cmex-)?big5-?(20)?03$/i Big5-2003 (national standard)
big5ext /\b(cmex-)?big5-?e(xt)?$/i CMEX's Big5e Extension
big5plus /\b(cmex-)?big5-?p(lus)?$/i CMEX's Big5+ Extension
/\b(cmex-)?big5\+$/i
cccii /\b(ccag-)?cccii$/i Chinese Character Code for
Information Interchange
cns11643-1 /\bCNS[-_ ]?11643[-_]1$/i Taiwan's CNS map, plane 1
cns11643-2 /\bCNS[-_ ]?11643[-_]2$/i Taiwan's CNS map, plane 2
cns11643-3 /\bCNS[-_ ]?11643[-_]3$/i Taiwan's CNS map, plane 3
cns11643-4 /\bCNS[-_ ]?11643[-_]4$/i Taiwan's CNS map, plane 4
cns11643-5 /\bCNS[-_ ]?11643[-_]5$/i Taiwan's CNS map, plane 5
cns11643-6 /\bCNS[-_ ]?11643[-_]6$/i Taiwan's CNS map, plane 6
cns11643-7 /\bCNS[-_ ]?11643[-_]7$/i Taiwan's CNS map, plane 7
cns11643-f /\bCNS[-_ ]?11643[-_]f$/i Taiwan's CNS map, plane F
euc-tw /\beuc.*tw$/i EUC (Extended Unix Character)
/\btw.*euc$/i
gb18030 /\bGB[-_ ]?18030$/i GBK with Traditional Characters
unisys /\bunisys$/i Unisys Traditional Chinese
unisys-sosi1 Unisys SOSI1 transport encoding
unisys-sosi2 Unisys SOSI2 transport encoding

Detailed descriptions are as follows:

BIG5-1984
This is the original Big5 encoding made by TCA Taiwan.

BIG5-2003
This revised encoding is now national standard, as an appendix of
CNS11643.

BIG5PLUS
This encoding, while not heavily used, is an attempt to bring all
Taiwan's conflicting internal-use encodings together, and fit it as
an extension to the widely-deployed Big5 range, by CMEX Taiwan.

BIG5EXT
The CMEX's second (and less ambitious) try at unifying the most
commonly used characters not covered by Big5, while not polluting
out of the 94x94 arragement like BIG5PLUS did.

CCCII
The earliest (and most sophisticated) Traditional Chinese encoding,
with a three-byte raw character map, made in 1980 by the Chinese
Character Analysis Group (CCAG), used mostly in library systems.

EUC-TW
The EUC transport version of "CNS11643" (planes 1-7), the
comprehensive character set used by the Taiwan government.

CNS11643-*
The raw character map extracted from the Unihan database, including
the plane F which wasn't included in "EUC-TW".

GB18030
An extension to GBK, this encoding lists most Han characters (both
simplified and traditional), as well as some other encodings used by
other peoples in China.

UNISYS
Unisys System's internal Chinese mapping.

NOTES
If you are looking for ways to transliterate between Simplified and
Traditional Chinese, please take a look at Encode::HanConvert. Note that
the direct mapping via Unicode is lossy, and usually doesn't work at
all.

Please send me suggestions if you want to see more encoding added, such
as "BIG5-GCCS" (superseded by "BIG5-HKSCS"). Other suggestions are
welcome, too.

SEE ALSO
Encode, Encode::HanConvert

ACKNOWLEDGEMENTS
Some of the maps here are generated from GNU libiconv's test files, with
kind permission from Bruno Haible.

Map for "BIG5PLUS" is generated from the BIG52UCS.TXT file, courtesy of
CMEX Taiwan (Chinese Microcomputer Extended Foundation,
<http://www.cmex.org.tw/>).

Map for "BIG5-1984" is supplied by imacat.

Map for "CCCII" is supplied by the Koha Taiwan project.

AUTHORS
Audrey Tang <[email protected]>

COPYRIGHT
Copyright 2002-2007 by Audrey Tang <[email protected]>.

This software is released under the MIT license cited below.

The "MIT" License
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.