Temporal Integrity Concepts and Notations
This chapter develops the concepts and notation required to discuss temporal entity integrity and temporal referential integrity, and also introduces a graphic notation for representing temporal integrity constraints.
Keywords
assertion time; atemporal state; bitemporal cell; coalesce; existence-dependent; implicitly bitemporal; inscription; referent identifier; referent integrity; row integrity; state time; temporal entity integrity; temporal referential integrity
Two of the principal constraints on relational tables are entity integrity and referential integrity. Primary key declarations set up the mechanisms by which a DBMS enforces entity integrity. Foreign key declarations set up the mechanisms ...
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