Coherently Explaining UML Statechart and Collaboration Diagrams by Graph Transformations

In this paper we continue our work on the formalization and validation of UML models by means of graph transformation systems. We here concentrate on statechart and collaboration diagrams albeit our approach covers use case, class, object, and sequence diagrams as well. The statechart and collaboration diagrams describe the operations of the underlying class diagram and include OCL expressions as guards and parts of message expressions. We illustrate in detail the generation of graph transformation rules for the statechart and collaboration diagrams.