Based on top of Web protocols and XML language, Web services are emerging as a framework to provide applicationto-application interaction. An important challenge is their integration in order to provide new value-added composite services, allowing consequently Business-to-Business relationships. Therefore, many composition languages have been proposed in the past few years. However, a weakness of these languages is that they are difficult to use in early stages of development, such as specification. Thus, an extension to UML 2.0, named UML-S, was introduced to develop composite Web services conforming to the modeldriven engineering vision. This paper introduces the necessary transformation rules between UML-S and low-level code to comply with MDE approach.
Embedded computing systems, sensor networks, LBS pervasive deployment environments, and worldwide computing systems have common characteristics. They are large scale, decentralized and dynamic networks, and needing context-awarness to automatically adapt their behaviour and continue their execution despite network dynamics. Identifying innovative software engineering approaches that take into account all the above mentionned characteristics is a real challenge. This paper focuses on LBS applications and the middleware models required for supporting their operation and characteristics.
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