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Architecture design and specification is more important than algorithm or data structure establishment for a complex system, existing Architecture Description Languages are difficult to support the complete Internetware developing process. Petri nets describe system graphically and mathematically, provide a way to solve the problems in Internetware description and development. In this paper, the authors investigate Internetware architecture description methods, current application of Petri nets in Internetware and the deficiency; present basic principles to describe Internetware architecture using Petri nets, the possible architecture model and architecture evolution mechanisms; discuss subnet based Web services composition description technologies; present the idea of developing Internetware using Petri nets as a whole process unified model.
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