Authors: Doberkat, Ernst-Erich
Omodeo, Eugenio G.
Title: ER modelling from first relational principles
Language (ISO): en
Abstract: Entity-Relationship modelling is a popular technique for data modelling. Despite its popularity and wide spread use, it lacks a firm semantic foundation. We propose a translation of an ER-model into relation algebra, suggesting that this kind of algebra does provide suitable mechanisms for establishing a formal semantics of Entity-Relationship modelling. The work reported on here deals first with the techniques necessary for the translation, thus constructing a static view of an ER-model in an abstract setting of what might be called logic without variables. We then undertake a detailed analysis of the insertion and deletion operations for an ER-model represented in terms of the relation calculus.
Subject Headings: Entity-Relationship models (static and dynamic view)
relational foundations of data modelling.
relation algebra
URI: http://hdl.handle.net/2003/2679
http://dx.doi.org/10.17877/DE290R-16053
Issue Date: 2003-04-28
Provenance: Universität Dortmund
Appears in Collections:LS 10 Software-Technologie

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