Abstract
Communication is an essential part of service-oriented trustworthy software. The actual communication mechanism among services adopts asynchronous communications and supports broadcast communications. However, in order to achieve a better performance in analysis and verification, most existing formal languages rely on the strong hypothesis: the communication between services is synchronous. In this paper, we propose a novel model, which can model synchronous communications, asynchronous communications and broadcast communications in a uniform way. Moreover, we investigate the preservation problem of the weak termination and deadlocks of a composite service under the hierarchical communication models.
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