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.\"
.IX Title "Locale::Language 3pm"
.TH Locale::Language 3pm "2009-02-12" "perl v5.10.1" "Perl Programmers Reference Guide"
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.SH "NAME"
Locale::Language \- ISO two letter codes for language identification (ISO 639)
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\&    use Locale::Language;
\&    
\&    $lang = code2language(\*(Aqen\*(Aq);        # $lang gets \*(AqEnglish\*(Aq
\&    $code = language2code(\*(AqFrench\*(Aq);    # $code gets \*(Aqfr\*(Aq
\&    
\&    @codes   = all_language_codes();
\&    @names   = all_language_names();
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \f(CW\*(C`Locale::Language\*(C'\fR module provides access to the \s-1ISO\s0 two-letter
codes for identifying languages, as defined in \s-1ISO\s0 639. You can either
access the codes via the \*(L"conversion routines\*(R" (described below),
or via the two functions which return lists of all language codes or
all language names.
.SH "CONVERSION ROUTINES"
.IX Header "CONVERSION ROUTINES"
There are two conversion routines: \f(CW\*(C`code2language()\*(C'\fR and \f(CW\*(C`language2code()\*(C'\fR.
.IP "\fIcode2language()\fR" 4
.IX Item "code2language()"
This function takes a two letter language code and returns a string
which contains the name of the language identified. If the code is
not a valid language code, as defined by \s-1ISO\s0 639, then \f(CW\*(C`undef\*(C'\fR
will be returned.
.Sp
.Vb 1
\&    $lang = code2language($code);
.Ve
.IP "\fIlanguage2code()\fR" 4
.IX Item "language2code()"
This function takes a language name and returns the corresponding
two letter language code, if such exists.
If the argument could not be identified as a language name,
then \f(CW\*(C`undef\*(C'\fR will be returned.
.Sp
.Vb 1
\&    $code = language2code(\*(AqFrench\*(Aq);
.Ve
.Sp
The case of the language name is not important.
See the section \*(L"\s-1KNOWN\s0 \s-1BUGS\s0 \s-1AND\s0 \s-1LIMITATIONS\s0\*(R" below.
.SH "QUERY ROUTINES"
.IX Header "QUERY ROUTINES"
There are two function which can be used to obtain a list of all
language codes, or all language names:
.ie n .IP """all_language_codes()""" 4
.el .IP "\f(CWall_language_codes()\fR" 4
.IX Item "all_language_codes()"
Returns a list of all two-letter language codes.
The codes are guaranteed to be all lower-case,
and not in any particular order.
.ie n .IP """all_language_names()""" 4
.el .IP "\f(CWall_language_names()\fR" 4
.IX Item "all_language_names()"
Returns a list of all language names for which there is a corresponding
two-letter language code. The names are capitalised, and not returned
in any particular order.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
The following example illustrates use of the \f(CW\*(C`code2language()\*(C'\fR function.
The user is prompted for a language code, and then told the corresponding
language name:
.PP
.Vb 1
\&    $| = 1;    # turn off buffering
\&    
\&    print "Enter language code: ";
\&    chop($code = <STDIN>);
\&    $lang = code2language($code);
\&    if (defined $lang)
\&    {
\&        print "$code = $lang\en";
\&    }
\&    else
\&    {
\&        print "\*(Aq$code\*(Aq is not a valid language code!\en";
\&    }
.Ve
.SH "KNOWN BUGS AND LIMITATIONS"
.IX Header "KNOWN BUGS AND LIMITATIONS"
.IP "\(bu" 4
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.
.IP "\(bu" 4
Currently just supports the two letter language codes \-
there are also three-letter codes, and numbers.
Would these be of any use to anyone?
.SH "SEE ALSO"
.IX Header "SEE ALSO"
.IP "Locale::Country" 4
.IX Item "Locale::Country"
\&\s-1ISO\s0 codes for identification of country (\s-1ISO\s0 3166).
Supports 2\-letter, 3\-letter, and numeric country codes.
.IP "Locale::Script" 4
.IX Item "Locale::Script"
\&\s-1ISO\s0 codes for identification of written scripts (\s-1ISO\s0 15924).
.IP "Locale::Currency" 4
.IX Item "Locale::Currency"
\&\s-1ISO\s0 three letter codes for identification of currencies and funds (\s-1ISO\s0 4217).
.IP "\s-1ISO\s0 639:1988 (E/F)" 4
.IX Item "ISO 639:1988 (E/F)"
Code for the representation of names of languages.
.IP "http://lcweb.loc.gov/standards/iso639\-2/langhome.html" 4
.IX Item "http://lcweb.loc.gov/standards/iso639-2/langhome.html"
Home page for \s-1ISO\s0 639\-2.
.SH "AUTHOR"
.IX Header "AUTHOR"
Neil Bowers <neil@bowers.com>
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (C) 2002\-2004, Neil Bowers.
.PP
Copyright (c) 1997\-2001 Canon Research Centre Europe (\s-1CRE\s0).
.PP
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
