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This paper defines an algebra for the manipulation of an entity-relationship data base. The algebra is said to be complete through equivalence with the usual definition of completeness for relational data manipulation languages. This work is intended to provide a sound basis for the definition of complete entity-relationship DMLs, an essential feature to make the ER model fully operational.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.