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Locale::Script(3pm)    Perl Programmers Reference Guide    Locale::Script(3pm)

       Locale::Script - ISO codes for script identification (ISO 15924)

           use Locale::Script;
           use Locale::Constants;

           $script  = code2script('ph');                       # 'Phoenician'
           $code    = script2code('Tibetan');                  # 'bo'
           $code3   = script2code('Tibetan',
                                  LOCALE_CODE_ALPHA_3);        # 'bod'
           $codeN   = script2code('Tibetan',
                                  LOCALE_CODE_ALPHA_NUMERIC);  # 330

           @codes   = all_script_codes();
           @scripts = all_script_names();

       The "Locale::Script" module provides access to the ISO codes for
       identifying scripts, as defined in ISO 15924.  For example, Egyptian
       hieroglyphs are denoted by the two-letter code 'eg', the three-letter
       code 'egy', and the numeric code 050.

       You can either access the codes via the conversion routines (described
       below), or with the two functions which return lists of all script
       codes or all script names.

       There are three different code sets you can use for identifying

           Two letter codes, such as 'bo' for Tibetan.  This code set is
           identified with the symbol "LOCALE_CODE_ALPHA_2".

           Three letter codes, such as 'ell' for Greek.  This code set is
           identified with the symbol "LOCALE_CODE_ALPHA_3".

           Numeric codes, such as 410 for Hiragana.  This code set is
           identified with the symbol "LOCALE_CODE_NUMERIC".

       All of the routines take an optional additional argument which
       specifies the code set to use.  If not specified, it defaults to the
       two-letter codes.  This is partly for backwards compatibility (previous
       versions of Locale modules only supported the alpha-2 codes), and
       partly because they are the most widely used codes.

       The alpha-2 and alpha-3 codes are not case-dependent, so you can use
       'BO', 'Bo', 'bO' or 'bo' for Tibetan.  When a code is returned by one
       of the functions in this module, it will always be lower-case.

       The standard defines various special codes.

       o   The standard reserves codes in the ranges qa - qt, qaa - qat, and
           900 - 919, for private use.

       o   zx, zxx, and 997, are the codes for unwritten languages.

       o   zy, zyy, and 998, are the codes for an undetermined script.

       o   zz, zzz, and 999, are the codes for an uncoded script.

       The private codes are not recognised by Locale::Script, but the others

       There are three conversion routines: "code2script()", "script2code()",
       and "script_code2code()".

       code2script( CODE, [ CODESET ] )
           This function takes a script code and returns a string which
           contains the name of the script identified.  If the code is not a
           valid script code, as defined by ISO 15924, then "undef" will be

               $script = code2script('cy');   # Cyrillic

       script2code( STRING, [ CODESET ] )
           This function takes a script name and returns the corresponding
           script code, if such exists.  If the argument could not be
           identified as a script name, then "undef" will be returned:

               $code = script2code('Gothic', LOCALE_CODE_ALPHA_3);
               # $code will now be 'gth'

           The case of the script name is not important.  See the section
           "KNOWN BUGS AND LIMITATIONS" below.

       script_code2code( CODE, CODESET, CODESET )
           This function takes a script code from one code set, and returns
           the corresponding code from another code set.

               $alpha2 = script_code2code('jwi',
                            LOCALE_CODE_ALPHA_3 => LOCALE_CODE_ALPHA_2);
               # $alpha2 will now be 'jw' (Javanese)

           If the code passed is not a valid script code in the first code
           set, or if there isn't a code for the corresponding script in the
           second code set, then "undef" will be returned.

       There are two function which can be used to obtain a list of all codes,
       or all script names:

       "all_script_codes ( [ CODESET ] )"
           Returns a list of all two-letter script codes.  The codes are
           guaranteed to be all lower-case, and not in any particular order.

       "all_script_names ( [ CODESET ] )"
           Returns a list of all script names for which there is a
           corresponding script code in the specified code set.  The names are
           capitalised, and not returned in any particular order.

       The following example illustrates use of the "code2script()" function.
       The user is prompted for a script code, and then told the corresponding
       script name:

           $| = 1;   # turn off buffering

           print "Enter script code: ";
           chop($code = <STDIN>);
           $script = code2script($code, LOCALE_CODE_ALPHA_2);
           if (defined $script)
               print "$code = $script\n";
               print "'$code' is not a valid script code!\n";

       o   When using "script2code()", the script name must currently appear
           exactly as it does in the source of the module. For example,

               script2code('Egyptian hieroglyphs')

           will return eg, as expected. But the following will all return

               script2code('Egyptian Hieroglypics')

           If there's need for it, a future version could have variants for
           script names.

       o   In the current implementation, all data is read in when the module
           is loaded, and then held in memory.  A lazy implementation would be
           more memory friendly.

           ISO two letter codes for identification of language (ISO 639).

           ISO three letter codes for identification of currencies and funds
           (ISO 4217).

           ISO three letter codes for identification of countries (ISO 3166)

       ISO 15924
           The ISO standard which defines these codes.

           Home page for ISO 15924.

       Neil Bowers <neil@bowers.com>

       Copyright (c) 2002-2004 Neil Bowers.

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

perl v5.12.1                      2010-05-13               Locale::Script(3pm)

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