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The Universal-Relation Data Model for Logical Independence
March/April 1988 (vol. 5 no. 2)
pp. 80-85

The universal-relation model is introduced, and its fundamental ideas are outlined. This model keeps access-path independence by removing the need for logical navigation among relations. One benefit is a simple yet powerful query-language interface. Two universal-relation database-management systems are discussed that provide good examples of the model: System/U, developed at Stanford University, and FIDL, developed at International Computers Ltd. in Britain.

Index Terms:
relational databases; information retrieval; query processing; universal-relation data model; logical independence; access-path independence; logical navigation; query-language interface; database-management systems; System/U; Stanford University; FIDL; International Computers; information retrieval; query languages; relational databases
Citation:
Moshe Y. Vardi, "The Universal-Relation Data Model for Logical Independence," IEEE Software, vol. 5, no. 2, pp. 80-85, March-April 1988, doi:10.1109/52.2015
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