- require $env->app_file("data/impl/xml/mw_xml_data.php");
- require $env->app_file("data/impl/xml/mw_xml_data_handler.php");
+ if(!class_exists("mw_xml_data")) require_once $env->app_file("data/impl/xml/mw_xml_data.php");
+ if(!class_exists("mw_xml_data_handler")) require_once $env->app_file("data/impl/xml/mw_xml_data_handler.php");