Abstract. In this paper, we introduce the notion of a community of autonomous units as a rule-based and graph-transformational device to model processes that run interactively but independently of each other in a common environment. The emphasis of the approach is laid on the study of the formal semantics of a community as a whole and of each of its member units separately. We concentrate on the sequential case where only one unit can act at a time and the rule applications of the involved units are interleaved with each other.

No abstract

In this paper we present a concept of a rigorous approach that provides a formal semantics for a fundamental subset of UML. This semantics is derived by translating a given UML model into a graph transformation system, allowing modelers to actually execute their UML model. The graph transformation system comprises graph transformation rules and a working graph which represents the current state of the modeled system. In order to support UML models which use OCL, we introduce a specific graph transformation approach that incorporates full OCL in the common UML fashion. The considered UML subset is defined by means of a metamodel similar to the UML 1.5 metamodel. The concept of a system state that represents the state of the system at a specific point in time during execution is likewise introduced by means of a metamodel. The simulated system run is performed by applying graph transformation rules on the working graph. The approach has been implemented in a research prototype which allows the modeler to execute the specified model and to validate the basic aspects of the model in an early software development phase.

This paper shows how integrated UML models combining class, object, use-case, collaboration

Abstract. In this paper, the two types of UML interaction diagrams are considered. A translation of sequence diagrams into collaboration diagrams is constructed by means of graph transformation and shown correct.