MLT_REGISTER_METADATA( consumer_type, "xml", metadata, "consumer_xml.yml" );
MLT_REGISTER_METADATA( producer_type, "xml", metadata, "producer_xml.yml" );
MLT_REGISTER_METADATA( producer_type, "xml-string", metadata, "producer_xml-string.yml" );
MLT_REGISTER_METADATA( consumer_type, "xml", metadata, "consumer_xml.yml" );
MLT_REGISTER_METADATA( producer_type, "xml", metadata, "producer_xml.yml" );
MLT_REGISTER_METADATA( producer_type, "xml-string", metadata, "producer_xml-string.yml" );