Michael R. Blaha
Abstract
Of the many approaches to relational database design, the Object Modeling Technique (OMT) is particularly effective. A comprehensive explanation and two applications show the semantic improvement of OMT over other approaches.
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Index Terms
- Relational database design using an object-oriented methodology
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Reviews
Alfs T. Berztiss
This paper should be required reading for all designers of information systems. I myself now use its object modeling technique (OMT) diagrams as an input in the development of formal specifications of information systems. Since OMT was introduced earlier [1], the primary purpose of this paper is to show how OMT diagrams can be converted into relational database schemas. However, it also provides a stand-alone introduction to OMT, which combines logical relational design methodology [2] with the property and operation inheritance of object orientation. An initial design is a diagram containing three kinds of constructs: a hierarchy of generalization relationships between object classes, entity-relationship associations between objects, and parts explosion trees that represent the aggregation of objects into composite objects. Examples show how the different constructs are combined into a single diagram.
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