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Semantic information connected with data

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Database Theory — ICDT '92 (ICDT 1992)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 646))

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Abstract

Informational capability of an attribute set is defined as the set of generated propositions. General data structures (comprising the set construct, tuple construct, functional as well as relational view) are compared for their informational capability using the definability relation. Relations of distinguishing capability (<dc) and comparison based on cardinality (≤bc) are defined on the set of attributes and examined with respect to the informational capability. Equivalent transformation of a database schema is defined and we prove that the general object-function schema can be equivalently transformed into a schema containing only unary (flat) attributes.

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Joachim Biskup Richard Hull

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© 1992 Springer-Verlag Berlin Heidelberg

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Duží, M. (1992). Semantic information connected with data. In: Biskup, J., Hull, R. (eds) Database Theory — ICDT '92. ICDT 1992. Lecture Notes in Computer Science, vol 646. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-56039-4_54

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  • DOI: https://doi.org/10.1007/3-540-56039-4_54

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-56039-5

  • Online ISBN: 978-3-540-47360-2

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