SCHEMA Cardinality_of_relationship_arm;
USE FROM
Maths_space_arm;
-- ISO/TS 10303-1091
TYPE relationship_select =
EXTENSIBLE
SELECT;
END_TYPE;
ENTITY Cardinality_of_related_class;
cardinality : Maths_space;
relationship : relationship_select;
END_ENTITY;
ENTITY Cardinality_of_relating_class;
cardinality : Maths_space;
relationship : relationship_select;
END_ENTITY;
END_SCHEMA; -- Cardinality_of_relationship_arm