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 <audreyt@audreyt.org>

COPYRIGHT

       Copyright 2002-2007 by Audrey Tang <audreyt@audreyt.org>.

       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.