针对Web服务编排标准WS-CDL中信息对齐交互模式的异步特性,提出了一种基于进程代数的Web服务编排方法(PA4WS),该方法新增WS-CDL工作单元描述算子,通过设置工作单元算子的卫式条件和循环条件来描述异步交互,进而完成对信息对齐交互的建模。
A Process Algebra for Web Service(PA4WS) is proposed to model asynchronous Interaction Based Information Alignmen(tIBIA) in WS-CDL of Web service choreography.PA4WS equips the operator of WorkUnit of WS-CDL,which is convenient to describe asynchronous interaction by setting guard-condition and repeat-condition and IBIA.