A State_feature_space is a Physical_space that consists of points, curves, surfaces, or finite volumes within a Product_specification_or_set for a single State.
The points, curves, surfaces or finite volumes are specified by an instance of Components_of_state_feature_space that references a Product_feature_space.
The State is specified by an instance of State_feature_space_for_state.
EXPRESS specification:
*) ENTITY State_feature_space SUBTYPE OF (Physical_space); END_ENTITY; (*