print "optag: ".$config{opt_tag4_notref}."\n";
if (length($config{opt_tag4_notref})>0){
  my(@opt_tags) = split( /|/,  $config{opt_tag4_notref} );
  foreach (@opt_tags) {
    push(@header_list, "opt. tag <i>".$_."</i>");
  }
  print Dumper(@opt_tags);
}