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Author Guoqing Chen ♦ Kerre, E.E.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1998
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Special computer methods
Subject Keyword Erbium ♦ Object oriented modeling ♦ Fuzzy sets ♦ Object oriented databases ♦ Mathematics ♦ Computer science ♦ Uncertainty ♦ Information systems ♦ Information analysis ♦ Fuzzy set theory
Abstract Entity relational (ER) and enhanced ER (EER) models play an important role in conceptual data modeling. This paper presents fuzzy extensions to several major ER/EER concepts so that uncertainty and imprecision in data and semantics can be represented and dealt with at a conceptual level. First, fuzzy extensions to basic ER/EER concepts such as superclass/subclass, generalization/specialization, and shared subclass/category are discussed. Next, the attribute inheritance is investigated in a fuzzy context, including multiple inheritance, selective inheritance, and the inheritance for derived attributes. Finally, certain constraints on relationships are explored in terms of the inheritance constraint, the participation constraint, and the cardinality constraint.
Description Author affiliation: MIS Div., Tsinghua Univ., Beijing, China (Guoqing Chen)
ISBN 078034863X
ISSN 10987584
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1998-05-04
Publisher Place USA
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 546.92 kB
Page Count 6
Starting Page 1320
Ending Page 1325

Source: IEEE Xplore Digital Library