(Inherited-Facet-Value Slot-Value-Type Elevator Hoistway_Depth Real-Number) (Inherited-Facet-Value Slot-Cardinality Elevator Hoistway_Depth 1) (<= (Has-Parameter-Slot $X Hoistway_Depth) (Elevator $X)) (Inherited-Slot-Value Elevator Has-Parameter-Slot Hoistway_Depth)