A preliminary system for the design of DBTG data structures
Communications of the ACM
A relational model of data for large shared data banks
Communications of the ACM
A generalized access path model and its application to a relational data base system
SIGMOD '76 Proceedings of the 1976 ACM SIGMOD international conference on Management of data
A System to Increase Data Independence in a Hierarchical Structure
GI - 5. Jahrestagung
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In order to provide independence between the user's view of a data base and the actual data structure a generalized translator is presented. Two particular implementations with similar objectives show the feasibility of such a translator which leads to a two-level data base architecture.