A relational model of data for large shared data banks
Communications of the ACM
LSL: a Link and Selector Language
SIGMOD '76 Proceedings of the 1976 ACM SIGMOD international conference on Management of data
An implementation of a query language supporting path expressions
SIGMOD '82 Proceedings of the 1982 ACM SIGMOD international conference on Management of data
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The Genealogical Information System (GENISYS) utilizes automatic program generation to produce query specific access paths and query specific data access programs. The query language of GENISYS along with the ability to include user defined algorithms in the data access programs provide the query facilities of a general data base system, while the use of program generation allows efficient data access.