介绍了接口自动机的基本语法,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),定义了接口自动机和BPEL4WS之间的概念映...介绍了接口自动机的基本语法,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),定义了接口自动机和BPEL4WS之间的概念映射,并给出了BPEL4WS的基于接口自动机的形式化模型,最后通过一个案例给出了BPEL4WS到接口自动机的映射及验证的方法。展开更多
In order to improve the design and implementation quality of web service compositions,formal methods are used to model them and certain properties are verified.WCFA （web service interface control flow automata）is us...In order to improve the design and implementation quality of web service compositions,formal methods are used to model them and certain properties are verified.WCFA （web service interface control flow automata）is used to model web services,especially the control flow and possible interactions with other web services.A web service composition consists of a set of interacting WCFA.The global behavior of web service compositions is captured by NWA（nested word automata）.A variation of the depth-first search algorithm is used to transform a set of WCFA into an NWA.State formulae and call stacks at each node of NWA are computed by a path-sensitive reachability analysis.Safety properties,call stack inspection properties and pre/post-conditions of service invocations are described by assertions.Then verification of these assertions is carried out by an automated SAT tool.展开更多
文摘介绍了接口自动机的基本语法,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),定义了接口自动机和BPEL4WS之间的概念映射,并给出了BPEL4WS的基于接口自动机的形式化模型,最后通过一个案例给出了BPEL4WS到接口自动机的映射及验证的方法。
基金The National Key Technology R&D Program of Chinaduring the 11th Five-Year Plan Period(No.2006BAH02A12)the National High Technology Research and Development Program of China(863 Program)(No.2006AA010101)
文摘In order to improve the design and implementation quality of web service compositions,formal methods are used to model them and certain properties are verified.WCFA （web service interface control flow automata）is used to model web services,especially the control flow and possible interactions with other web services.A web service composition consists of a set of interacting WCFA.The global behavior of web service compositions is captured by NWA（nested word automata）.A variation of the depth-first search algorithm is used to transform a set of WCFA into an NWA.State formulae and call stacks at each node of NWA are computed by a path-sensitive reachability analysis.Safety properties,call stack inspection properties and pre/post-conditions of service invocations are described by assertions.Then verification of these assertions is carried out by an automated SAT tool.
