The object constraint language: precise modeling with UML
The object constraint language: precise modeling with UML
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The Object Constraint Language OCL is part of the Unified Modeling Language UML. Within software engineering, UML is regarded today as an important step towards development of high-quality object-oriented systems. OCL allows to describe system structure by invariants and system behavior by pre- and postconditions. This paper explains the functionality of the UML Specification Environment USE which allows to validate and verify UML and OCL descriptions. The paper also uses a new approach to handle UML statecharts by OCL pre- and postconditions.