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With the increasing demands for adaptive middleware of dynamic systems in pervasive computing environments, the need for dynamic software architecture and programming infrastructure to achieve dynamic adaptation is widely recognized. In this paper, the authors firstly present a semantic and adaptive middleware architecture called ScudWare that supports for dynamic and heterogeneous environments. ScudWare middleware is based on adaptive communication environments, which consists of adaptive components, and semantic virtual agents. Specially, a ScudADL framework and the specification semantics, based on higher-order typed pi calculus theory, are proposed, which describes ScudWare component structure characters, and dynamic behavior adaptation.
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