Web服务组合研究领域的一个重要的问题是如何形式化描述Web服务组合,如何验证服务组合的正确性。Web服务组合的形式化模型来可以用来检查、验证Web服务组合以保证组合的正确性。Pi-演算是一种适合于Web服务组合建模的进程代数。本文介绍...Web服务组合研究领域的一个重要的问题是如何形式化描述Web服务组合,如何验证服务组合的正确性。Web服务组合的形式化模型来可以用来检查、验证Web服务组合以保证组合的正确性。Pi-演算是一种适合于Web服务组合建模的进程代数。本文介绍了Pi-演算的基本语法,针对目前最主要的一种描述和执行基于工作流模式的Web服务组合的规范-Web服务商业流程执行语言(Business Process Execution Language for Web Services,BPEL4WS),定义了Pi-演算和BPEL4WS之间的概念映射,并给出了BPEL4WS的基于Pi-演算的形式化模型,最后通过一个案例给出了模型验证的方法。展开更多
Applying dynamic web services composition is one of the important schemas for solving service-oriented architecture （SOA）and service-oriented computing（SOC）.For implementing dynamic web services composition,the mu...Applying dynamic web services composition is one of the important schemas for solving service-oriented architecture （SOA）and service-oriented computing（SOC）.For implementing dynamic web services composition,the multi agent system （MAS）is applied to web services composition.First, the essentials of the MAS and web services composition are analyzed and their relationship is discussed.Secondly, an MAS-based architecture is designed for dynamic web services composition,and it is named as CSMWC.A Jade tool is used to implement the major components.The architecture can primarily implement syntactic level dynamic web services composition,and it gives a basis for semantic level dynamic web services composition.For specifying the correctness of the architecture,by using pi-calculus,the architecture of the MAS is formally described,and its dynamic properties and adaptability are reasoned.Finally,it demonstrates the idea proposed by the Pi4SOA tool.展开更多
文摘Web服务组合研究领域的一个重要的问题是如何形式化描述Web服务组合,如何验证服务组合的正确性。Web服务组合的形式化模型来可以用来检查、验证Web服务组合以保证组合的正确性。Pi-演算是一种适合于Web服务组合建模的进程代数。本文介绍了Pi-演算的基本语法,针对目前最主要的一种描述和执行基于工作流模式的Web服务组合的规范-Web服务商业流程执行语言(Business Process Execution Language for Web Services,BPEL4WS),定义了Pi-演算和BPEL4WS之间的概念映射,并给出了BPEL4WS的基于Pi-演算的形式化模型,最后通过一个案例给出了模型验证的方法。
基金The National Natural Science Foundation of China(No.90612014)IBM China Research Lab Joint Project
文摘Applying dynamic web services composition is one of the important schemas for solving service-oriented architecture （SOA）and service-oriented computing（SOC）.For implementing dynamic web services composition,the multi agent system （MAS）is applied to web services composition.First, the essentials of the MAS and web services composition are analyzed and their relationship is discussed.Secondly, an MAS-based architecture is designed for dynamic web services composition,and it is named as CSMWC.A Jade tool is used to implement the major components.The architecture can primarily implement syntactic level dynamic web services composition,and it gives a basis for semantic level dynamic web services composition.For specifying the correctness of the architecture,by using pi-calculus,the architecture of the MAS is formally described,and its dynamic properties and adaptability are reasoned.Finally,it demonstrates the idea proposed by the Pi4SOA tool.
基金国家自然科学基金(the National Natural Science Foundation of China under Grant No.60403027)湖北省自然科学基金(the Natural Science Foundation of Hubei Province of China under Grant No.2005ABA258)
