Research On Semantic-based Service Process Reuse

As a combination of workflow management and service computing, service process technology is a promising solution for distributed cooperative system. A service process presents the steps to solve a specific problem and the logic relationship among these steps. We believe service process is not only a tool to solve problems, but also a special kind of reuseful knowledge. To make service computing environment be an intelligent integrated environment of problem solving, combining semantic technology, this dissertation research service process reuse issue on following topics:(1) Research on the universal describing mechanism of service process model. A service process model presents its designer's knowledge of solving a specific problem. It exists many mechanisms for describing service process model and there are many differences among these mechanisms to express the knowledge. As the basis of service process reuse, it needs transforming the process models described by different mechanisms to models described by a uniform description mechanism. This dissertation proposes using process structure tree as the universal describing mechanism of service process model, desgins the method of transforming the process models described by other describing mechanisms to process structure tree, and analyzes the performance of related algorithms.(2) Research on semantic describing mechanism of service process. Semantics of service process is classified to goal semantics and context semantics. The goal semantics describes the functional goal of a service process or a service activity, and the context semantics describes the application context of a user of service process. This dissertation proposes definitions, functions and template configuration methods of these two semantics, and show their effects through comparative case study.(3) Research on service process knowledge reuse technology based on goal semantics. According to different requests to service process reuse, this dissertation puts forward a goal-based service process knowledge reuse framework. This framework divides service process knowledge reuse into process match and process composition, and classifies process match into two kinds-one based on instantial relationship and the other based on horizontal relationship. This dissertation proposes the approaches of realizing these reuse functions separately, shows the effectivity of these approaches by case study, and analyzes the performance of related algorithms..(4) Research on service process revision knowledge reuse technology based on context semantics. This dissertation proposes a top-down maximal common subtree retrieval algorithm, and discusses how to use data mining technology to mine the association of process change and context change, designs an approach to compose possible process change operations to feasible change sequence, demonstrates the effectivity of these approaches by case study, and analyzes the performance of related algorithms.(5) Research on the implementation of service process intelligent reuse prototype. According to above researches, a prototype system which integrates all reuse functions has been implemented. This dissertation introduces the system's framework and introduces the application details of every module in prototype.