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Article type: Research Article
Authors: Reusch, Bernd | Szwillus, Gerd
Affiliations: Universität Dortmund
Abstract: We study a term-language, which is used by the “Warsaw-School” in an abstract model for information systems. Various normal forms as well as standard expansions with respect to product terms are formulated and proved correct. It is shown that the shortest sums of so-called maximal sub-products are the shortest representations of terms and algorithms for their generation are given.
Keywords: Information system, query language, terms, normal forms
DOI: 10.3233/FI-1982-5102
Journal: Fundamenta Informaticae, vol. 5, no. 1, pp. 1-14, 1982
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