/**
  * Create a new type from a model
  * 
  * @param string	model name (= sub directory of models)
  * @param string	title of the new type
  * 
  * @return int		type id
  */
 static function _createTypeFromModel($a_model_name, $a_type_name)
 {
     if ($xml = file_get_contents(self::$builtin_path . "/" . $a_model_name . "/interface.xml")) {
         $type = new ilExternalContentType();
         if ($type->setXML($xml, $message)) {
             $type->setName($a_type_name);
             $type->create();
             return $type->getTypeId();
         }
     }
 }