An Active Pattern Infrastructure for Domain-Specific Languages

Tool support for design patterns is a critically important area of computer-aided software engineering. With the proliferation of Domain-Specific Modeling Languages (DSMLs), the adaptation of the notion of design patterns appears to be a promising direction of research. This paper introduces a new approach to DSML patterns, namely, the Active Model Pattern infrastructure. In this framework, not only the traditional insertion of predefined partial models is supported, but interactive, localized design-time manipulation of models. Optionally, the infrastructure can be adapted to handling transactional tracing information as well as transactional undo and redo operations. Possible realizations of the framework are also discussed and compare

Verifying Model Transformations by Structural Correspondence

Model transformations play a significant role in model based software development, and the correctness of the transformation is crucial to the success of the development effort. We have previously shown how we can use bisimulation to verify the preservation of certain behavioral properties across a transformation. However, transformations are often used to construct structurally different models, and we might wish to ensure that there is some structural correspondence to the original model. It may be possible to verify such transformations without having to explicitly specify the dynamic semantics of the source and target languages. In this paper, we present a technique to verify such transformations, by first specifying certain structural correspondence rules between the source and target languages, and extending the transformation so that these rules can be easily evaluated on the instance models. This will allow us to conclude if the output model has the expected structure. The verification is performed at the instance level, meaning that each execution of the transformation is verified. We will also look at some examples using this technique

Robot graphic simulation testbed

The objective of this research was twofold. First, the basic capabilities of ROBOSIM (graphical simulation system) were improved and extended by taking advantage of advanced graphic workstation technology and artificial intelligence programming techniques. Second, the scope of the graphic simulation testbed was extended to include general problems of Space Station automation. Hardware support for 3-D graphics and high processing performance make high resolution solid modeling, collision detection, and simulation of structural dynamics computationally feasible. The Space Station is a complex system with many interacting subsystems. Design and testing of automation concepts demand modeling of the affected processes, their interactions, and that of the proposed control systems. The automation testbed was designed to facilitate studies in Space Station automation concepts

07451 Abstracts Collection -- Model-Based Engineering of Embedded Real-Time Systems

From 04.11. to 09.11.2007, the Dagstuhl Seminar 07451 ``Model-Based Engineering of Embedded Real-Time Systems\u27\u27 was held in the International Conference and Research Center (IBFI), Schloss Dagstuhl. During the seminar, several participants presented their current research, and ongoing work and open problems were discussed. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper. The first section describes the seminar topics and goals in general. Links to extended abstracts or full papers are provided, if available

The Graph Rewriting and Transformation Language: GReAT

In this paper, we describe the language and features of our graph transformation tool, GReAT.We begin with a brief introduction and motivation, followed by an overview of the actual language, the modeling framework, and the tools that were written to support transformations. Finally, we compare GReAT to other similar tools, discuss additional functionality we are currently implementing, and describe some of our experiences with the tool thus far