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Astract: Due to company mergers and business to business interoperability, there is a need for model transformations in the area of business process modeling to facilitate scenarios like model integration and model synchronization. General model transformation approaches do not consider the special properties of business process models and horizontal transformation scenarios. Therefore, we propose a model transformation approach based on domainspecific patterns which are applied for analyzing business process models in a precise way. This approach facilitates the definition of business process model transformations, which can be easily adapted to different business process modeling languages and specific transformation problems. At the same time it supports the intuitive understanding of the domainexperts in business process modeling.

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Astract: UN/CEFACT´s Modeling Methodology (UMM) is a well accepted approach to define inter-organizational business processes. UMM models should be managed in a registry for two reasons: Firstly, business partners supporting the process can find it and bind to it. Secondly, a model - or more important parts thereof - may be reused in another model of an inter-organizational process. Accordingly, registering one model as one object in a registry is not appropriate. Those parts of a model that may be reused must become registry objects themselves. Extracting parts of a model results in objects that are logically inter-related. Thus, a registry model taking care of these inter-relationships is needed. In this paper we present a so-called business collaboration registry model that sits on top of the ebRIM (ebXML registry information model) in order to manage UMM business collaboration models in an ebXML registry. Furthermore, we outline the registry management functions for maintaining models in the registry.

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Astract: The United Nation´s Centre for Trade Facilitation and Electronic Business (UN/CEFACT) is an e-business standardization body. It is known from its work on UN/EDIFACT and ebXML. One of its ongoing work items is the UN/CEFACT modeling methodology (UMM) for modeling global choreographies of B2B scenarios. The goal of UMM is defining a shared business logic between business partners and fostering reuse of standardized process building blocks. The latest UMM version is defined as a UML 1.4 profile. In this paper we introduce the main concepts of UMM to realize its vision. Furthermore, the paper elaborates on the necessary UML meta model work-arounds we - as part of the specification´s editing team - took in order to accomplish the B2B requirements. Then we propose a move towards UML 2 that eliminates some of those workarounds. The paper is concluded with the introduction of a UMM modeling tool that we implemented on top of a commercial UML tool.

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Astract: With the rise of model-driven software development, more and more tasks are being per-formed on models, to exploit the higher level of abstraction, the richness of visualization, and their expressiveness. A variety of tools is available supporting different tasks, such as model creation, simulation, checking, and code generation. The exchange of models among different modeling tools and so the integration of their modeling languages becomes an important prerequisite for effective software development processes. Such an integration, however, poses, among others, three major problems: First, there is heterogeneity in textual representation, syntax, semantics, and scope of modeling languages and exchange formats. Second, developing integration solutions is a cumbersome, error-prone and highly repeti-tive task when, e.g., new versions of modeling tools are emerging. Third, inconsistencies are likely when concurrent development of models on basis of different tools take place.

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