Semantics of update operations for an extended entity-relationship model

Authors:
Bogdan Czejdo;Ramez Elmasri;Marek Rusinkiewicz;David W. Embley
Affiliations:
University of Alabama, Tuscaloosa, Alabama;University of Houston, Houston, Texas;University of Houston, Houston, Texas;Brigham Young University, Provo, Utah
Venue:
CSC '88 Proceedings of the 1988 ACM sixteenth annual conference on Computer science
Year:
1988

Citing 4
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Abstract

The Entity-Category-Relationship (ECR) model extends the Entity-Relationship (ER) model with the concepts of subclass and generalisation categories. In this paper semantics of update operations for the ECR model are discussed. The proposed update operations can be implemented as an interactive data manipulation language. This language is based on algebraic operators that can be invoked graphically to operate on ECR diagrams. A method of implementing the graphical ECR interface for accessing relational database systems is proposed.