Combining knowledge with many-valued logics |
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| Authors: | Barbara Messing |
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| Affiliation: | Information Systems Program, Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel |
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| Abstract: | We compare EER and OO data models from the point of view of design quality. Quality is measured in terms of (a) correctness of the conceptual schemas being designed, (b) time to complete the design task, and (c) designers' preferences of the models. Result of an experimental comparison of the two models reveal that the EER model surpasses the OO model for designing unary and ternary relationships, it takes less time to design EER schemas, and the EER model is preferred by designers. We conclude that even if the objective is to implement an OO database schema, the recommended procedure is to: (1) create an EER conceptual scheme, (2) map it to an OO schema, and augment the target schema with behavioral constructs that are unique to the OO approach. |
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| Keywords: | Data modeling Entity relationship model Object oriented model Database design Conceptual schema Experimentation Schema transformation Quality of design |
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