In this paper, we introduce a semiotics-based framework for evaluating the quality of conceptual schemas of databases. We created it based on an existing semiotics-based framework that has been used to evaluate other types of software entities. We propose two measures for evaluating the perceived semantic quality of conceptual schemas. The measures consider correspondence between conceptual data models and conceptual schemas that are created based on the models. In addition, we describe how to use one of the measures to evaluate computer-aided software engineering systems in terms of transforming conceptual data models into conceptual database schemas.
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