my $twig2= XML::Twig->new(    
        twig_handlers => { 
                'Parameter' => sub { 
                        
                        my $attr_name  = $_->{'att'}->{'name'}  // ''; 
                        my $attr_value = $_->{'att'}->{'value'} // ''; 

                        printf $FhResult "%s %s\n", $attr_name, $attr_value;
                },
        },
);