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SUBTYPE_CONSTRAINT alternate_measure_items FOR Measure_item; ABSTRACT SUPERTYPE; ONEOF (Measure_item_with_precision, Numerical_item_with_global_unit, Numerical_item_with_unit, Value_list, Value_range, Value_range_with_global_unit, Value_set, Value_with_tolerances); END_SUBTYPE_CONSTRAINT; -- alternate_measure_items |