Formal aspects of the relational model
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摘要
The relational model of data bases is studied from three interdependent viewpoints. Relational data bases are first modelled by directed hypergraphs, a concept derived in a straightforward way from Berge's hypergraph theory. Then the abstract directed hypergraphs are interpreted using a linguistic model, and finally are represented as a necessary step towards computer implementation. The normalization of relations is briefly discussed in the context of the three approaches.
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论文评审过程：Received 8 March 1977, Revised 12 July 1977, Available online 10 June 2003.
论文官网地址：https://doi.org/10.1016/0306-4379(78)90025-X
