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package Regexp::Common::URI::RFC2806;

use Regexp::Common::URI::RFC1035 qw /$domain/;
use Regexp::Common::URI::RFC2396 qw /$unreserved $escaped $hex/;

use strict;
use warnings;

use vars qw /$VERSION/;
$VERSION = '2010010201';

use vars qw /@EXPORT @EXPORT_OK %EXPORT_TAGS @ISA/;

use Exporter ();
@ISA = qw /Exporter/;


my %vars;

BEGIN {
    $vars {low}     = [qw /$dtmf_digit $wait_for_dial_tone $one_second_pause
                           $pause_character $visual_separator $phonedigit
                           $escaped_no_dquote $quoted_string $token_char
                           $token_chars/];
    $vars {parts}   = [qw /$future_extension/];
    $vars {connect} = [qw /$provider_hostname $provider_tag $service_provider
                           $private_prefix $local_network_prefix 
                           $global_network_prefix $network_prefix/];
    $vars {phone}   = [qw /$phone_context_ident $phone_context_tag
                           $area_specifier $post_dial $isdn_subaddress
                           $t33_subaddress $local_phone_number
                           $local_phone_number_no_future
                           $base_phone_number $global_phone_number
                           $global_phone_number_no_future $telephone_subscriber
                           $telephone_subscriber_no_future/];
    $vars {fax}     = [qw /$fax_local_phone $fax_local_phone_no_future
                           $fax_global_phone $fax_global_phone_no_future
                           $fax_subscriber $fax_subscriber_no_future/];
    $vars {modem}   = [qw //];
}

use vars map {@$_} values %vars;

@EXPORT      = ();
@EXPORT_OK   = map {@$_} values %vars;
%EXPORT_TAGS = (%vars, ALL => [@EXPORT_OK]);


# RFC 2806, URIs for tel, fax & modem.
$dtmf_digit        =  "(?:[*#ABCD])";
$wait_for_dial_tone=  "(?:w)";
$one_second_pause  =  "(?:p)";
$pause_character   =  "(?:[wp])";   # wait_for_dial_tone | one_second_pause.
$visual_separator  =  "(?:[\\-.()])";
$phonedigit        =  "(?:[0-9\\-.()])";  # DIGIT | visual_separator
$escaped_no_dquote =  "(?:%(?:[01]$hex)|2[013-9A-Fa-f]|[3-9A-Fa-f]$hex)";
$quoted_string     =  "(?:%22(?:(?:%5C(?:$unreserved|$escaped))|" .
                              "$unreserved+|$escaped_no_dquote)*%22)";
                      # It is unclear wether we can allow only unreserved
                      # characters to unescaped, or can we also use uric
                      # characters that are unescaped? Or pchars?
$token_char        =  "(?:[!'*\\-.0-9A-Z_a-z~]|" .
                          "%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|" .
                              "5[AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))";
                      # Only allowing unreserved chars to be unescaped.
$token_chars       =  "(?:(?:[!'*\\-.0-9A-Z_a-z~]+|"                   .
                            "%(?:2[13-7ABDEabde]|3[0-9]|4[1-9A-Fa-f]|" .
                                "5[AEFaef]|6[0-9A-Fa-f]|7[0-9ACEace]))*)";
$future_extension  =  "(?:;$token_chars"                       .
                      "(?:=(?:(?:$token_chars(?:[?]$token_chars)?)|" .
                      "$quoted_string))?)";
$provider_hostname =   $domain;
$provider_tag      =  "(?:tsp)";
$service_provider  =  "(?:;$provider_tag=$provider_hostname)";
$private_prefix    =  "(?:(?:[!'E-OQ-VX-Z_e-oq-vx-z~]|"                   .
                         "(?:%(?:2[124-7CFcf]|3[AC-Fac-f]|4[05-9A-Fa-f]|" .
                                "5[1-689A-Fa-f]|6[05-9A-Fa-f]|"           .
                                "7[1-689A-Ea-e])))"                       .
                         "(?:[!'()*\\-.0-9A-Z_a-z~]+|"                    .
                         "(?:%(?:2[1-9A-Fa-f]|3[AC-Fac-f]|"               .
                            "[4-6][0-9A-Fa-f]|7[0-9A-Ea-e])))*)";
$local_network_prefix
                   =  "(?:[0-9\\-.()*#ABCDwp]+)";
$global_network_prefix
                   =  "(?:[+][0-9\\-.()]+)";
$network_prefix    =  "(?:$global_network_prefix|$local_network_prefix)";
$phone_context_ident
                   =  "(?:$network_prefix|$private_prefix)";
$phone_context_tag =  "(?:phone-context)";
$area_specifier    =  "(?:;$phone_context_tag=$phone_context_ident)";
$post_dial         =  "(?:;postd=[0-9\\-.()*#ABCDwp]+)";
$isdn_subaddress   =  "(?:;isub=[0-9\\-.()]+)";
$t33_subaddress    =  "(?:;tsub=[0-9\\-.()]+)";

$local_phone_number=  "(?:[0-9\\-.()*#ABCDwp]+$isdn_subaddress?"      .
                         "$post_dial?$area_specifier"                 .
                         "(?:$area_specifier|$service_provider|"      .
                            "$future_extension)*)";
$local_phone_number_no_future
                   =  "(?:[0-9\\-.()*#ABCDwp]+$isdn_subaddress?"      .
                         "$post_dial?$area_specifier"                 .
                         "(?:$area_specifier|$service_provider)*)";
$fax_local_phone   =  "(?:[0-9\\-.()*#ABCDwp]+$isdn_subaddress?"      .
                         "$t33_subaddress?$post_dial?$area_specifier" .
                         "(?:$area_specifier|$service_provider|"      .
                            "$future_extension)*)";
$fax_local_phone_no_future
                   =  "(?:[0-9\\-.()*#ABCDwp]+$isdn_subaddress?"      .
                         "$t33_subaddress?$post_dial?$area_specifier" .
                         "(?:$area_specifier|$service_provider)*)";
$base_phone_number =  "(?:[0-9\\-.()]+)";
$global_phone_number
                   =  "(?:[+]$base_phone_number$isdn_subaddress?"     .
                                              "$post_dial?"           .
                         "(?:$area_specifier|$service_provider|"      .
                            "$future_extension)*)";
$global_phone_number_no_future
                   =  "(?:[+]$base_phone_number$isdn_subaddress?"     .
                                              "$post_dial?"           .
                         "(?:$area_specifier|$service_provider)*)";
$fax_global_phone  =  "(?:[+]$base_phone_number$isdn_subaddress?"     .
                              "$t33_subaddress?$post_dial?"           .
                         "(?:$area_specifier|$service_provider|"      .
                            "$future_extension)*)";
$fax_global_phone_no_future
                   =  "(?:[+]$base_phone_number$isdn_subaddress?"     .
                              "$t33_subaddress?$post_dial?"           .
                         "(?:$area_specifier|$service_provider)*)";
$telephone_subscriber
                   =  "(?:$global_phone_number|$local_phone_number)";
$telephone_subscriber_no_future
                   =  "(?:$global_phone_number_no_future|" .
                         "$local_phone_number_no_future)";
$fax_subscriber    =  "(?:$fax_global_phone|$fax_local_phone)";
$fax_subscriber_no_future
                   =  "(?:$fax_global_phone_no_future|"    .
                         "$fax_local_phone_no_future)";

1;

__END__

=pod

=head1 NAME

Regexp::Common::URI::RFC2806 -- Definitions from RFC2806;

=head1 SYNOPSIS

    use Regexp::Common::URI::RFC2806 qw /:ALL/;

=head1 DESCRIPTION

This package exports definitions from RFC2806. It's intended
usage is for Regexp::Common::URI submodules only. Its interface
might change without notice.

=head1 REFERENCES

=over 4

=item B<[RFC 2616]>

Fielding, R., Gettys, J., Mogul, J., Frystyk, H., Masinter, L., 
Leach, P. and Berners-Lee, Tim: I<Hypertext Transfer Protocol -- HTTP/1.1>.
June 1999.

=back

=head1 AUTHOR

Damian Conway (damian@conway.org)

=head1 MAINTAINANCE

This package is maintained by Abigail S<(I<regexp-common@abigail.be>)>.

=head1 BUGS AND IRRITATIONS

Bound to be plenty.

=head1 LICENSE and COPYRIGHT

This software is Copyright (c) 2001 - 2009, Damian Conway and Abigail.

This module is free software, and maybe used under any of the following
licenses:

 1) The Perl Artistic License.     See the file COPYRIGHT.AL.
 2) The Perl Artistic License 2.0. See the file COPYRIGHT.AL2.
 3) The BSD Licence.               See the file COPYRIGHT.BSD.
 4) The MIT Licence.               See the file COPYRIGHT.MIT.

=cut
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