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/usr/share/perl5/XML/SAX/PurePerl/UnicodeExt.pm is in libxml-sax-perl 0.99+dfsg-1.

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# $Id$

package XML::SAX::PurePerl;
use strict;

no warnings 'utf8';

sub chr_ref {
    return chr(shift);
}

if ($] >= 5.007002) {
    require Encode;
    
    Encode::define_alias( "UTF-16" => "UCS-2" );
    Encode::define_alias( "UTF-16BE" => "UCS-2" );
    Encode::define_alias( "UTF-16LE" => "ucs-2le" );
    Encode::define_alias( "UTF16LE" => "ucs-2le" );
}

1;