my $baum1   = $props->getProperty("BAUMSTRUCT_1");
my $baum2   = $props->getProperty("BAUMSTRUCT_2");
my $baum3   = $props->getProperty("BAUMSTRUCT_3");
my $baum4   = $props->getProperty("BAUMSTRUCT_4");

my $twig = new XML::Twig( twig_handlers => {  $baum1    => \&getBaum1,
                                              $baum2    => \&getBaum2,
                                              $baum3    => \&getBaum3,
                                              $baum4    => \&getBaum4
                                            } );
$twig->parsefile( $opt_datei );
$twig->purge;