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ENTITY Time_interval_with_bounds SUBTYPE OF (Time_interval); primary_bound : OPTIONAL date_or_event; secondary_bound : OPTIONAL date_or_event; duration_from_primary_bound : OPTIONAL Duration; WHERE WR1: NOT (EXISTS (secondary_bound) AND EXISTS (duration_from_primary_bound)); WR2: EXISTS (primary_bound) OR EXISTS (secondary_bound); END_ENTITY; -- Time_interval_with_bounds |
Entity data types and their attributesTime_intervalid: STRING; name: STRING; (OPT) description: STRING; Time_interval_with_bounds (OPT) primary_bound: date_or_event; (OPT) secondary_bound: date_or_event; (OPT) duration_from_primary_bound: Duration; |
Global rules for this entity data type- |