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Formalizing Object-Oriented Design Metrics based upon the UML Meta-ModelAbstract:
This paper discusses the formalization effort of object-oriented design metrics definitions and presents some concrete examples, developed upon the UML meta-model. The Object Constraint Language (OCL), a part of the Unified Modeling Language (UML) standard, is used in the formalization. The combination of the UML meta-model and OCL allows unambiguous metrics definition, which in turn helps increasing tool support for objectoriented metrics extraction. This formalization renders possible the comparisons among different sets of metrics, as well as it may be used to establish a common vocabulary among different stakeholders. As consequence, the precision of the metrics collection increases, contributing to the overall quality of the Software Engineering process.