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ACM Computing Surveys (CSUR)
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Database modeling and design: the entity-relationship approach
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ACM Computing Surveys (CSUR)
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ACM Transactions on Database Systems (TODS)
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International Journal of Human-Computer Studies
Design patterns: elements of reusable object-oriented software
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Communications of the ACM
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Data & Knowledge Engineering
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ACM Transactions on Database Systems (TODS)
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Communications of the ACM
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Communications of the ACM
International Journal of Human-Computer Studies
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Modern Database Management
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ER '97 Proceedings of the 16th International Conference on Conceptual Modeling
Theory of Relational Databases
Theory of Relational Databases
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International Journal of Human-Computer Studies
The use of a knowledge-based system in conceptual data modeling
Decision Support Systems
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Decision Support Systems
Information Systems Research
The use of a knowledge-based system in conceptual data modeling
Decision Support Systems
A knowledge-based object modeling advisor for developing quality object models
Expert Systems with Applications: An International Journal
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Expert Systems with Applications: An International Journal
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The paper describes the main features of a prototype tool CODASYS (COnceptual modeling tool for DAtabase SYStems), which purports to help novice designers engaged in conceptual data modeling. It is well known that conceptual data modeling is an error-prone process for novice database designers. The tool assists a designer in developing an entity-relationship diagram that can be translated to a normalized relational representation, free of derived dependencies. We first discuss a set of requirements for the tool that is based on achieving normal forms, on preventing data modeling errors, and on a theoretical foundation. We then discuss how the tool achieves the four normal forms and prevents common database errors such as incorrect degree, incorrect connectivity, and derived relationships. Further, we provide a cognitive framework for understanding novice error behavior and elaborate on how CODASYS addresses cognitive strain in database design. Next, we present the features of the tool and, with the help of flowcharts, discuss how these features have been implemented using a rule-based approach. It may be noted that empirical studies have been conducted to test the efficacy of the tool and have indicated significant improvement in novice designer performance.