Element function create_metamodels() Element function initialize_SCD(location : String) Element function initialize_PN(location_SCD : String, location_PN : String) Element function initialize_bottom(location : String) Element function initialize_AL(location_SCD : String, location_AL : String) Element function constraint_Natural(params : Element) Element function constraint_String(params : Element) Element function constraint_Location(params : Element) Element function constraint_Boolean(params : Element) Element function constraint_ActionLanguage(params : Element)