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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/3876

Title: VIEWS AND DECOMPOSITIONS OF DATABASES FROM A CATEGORICAL PERSPECTIVE
Authors: TUIJN, C
GYSSENS, Marc
Issue Date: 1992
Publisher: SPRINGER VERLAG
Citation: DATABASE THEORY - ICDT 92. p. 99-112
Series/Report: LECTURE NOTES IN COMPUTER SCIENCE, 646
Abstract: Since the introduction of the relational database model, a lot of efforts have been spent to describe conditions under which data decompositions can be achieved. In the past, these conditions were expressed in terms of dependencies. Here, we encapsulate more recent approaches based on partitioning in a categorical framework in order to obtain a very general context to study views and decomposition that is also applicable to complex-object models. Thereto, we use the categorical notion of presheaf. We argue that our model provides a more fundamental perspective on the concept of object-orientedness which compared to relational theory has developed in a rather ad-hoc manner. In particular, we show that the notion of sheaf yields a characterization for the presence of object-identity.
Notes: UNIV LIMBURG,B-3590 DIEPENBEEK,BELGIUM.TUIJN, C, AGFA GEVAERT,B-2650 EDEGEM,BELGIUM.
URI: http://hdl.handle.net/1942/3876
DOI: 10.1007/3-540-56039-4
ISI #: A1992LF70400007
ISSN: 0302-9743
Type: Journal Contribution
Appears in Collections: Research publications

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