摘要
随着工作流的广泛应用,人们对工作流系统的灵活性提出了新的要求。作为工作流系统的核心,工作流的过程元模型很大程度上决定了工作流系统的能力。结合互联网工程任务组(Internet Engineering Task Force,IETF)提出的策略的概念和策略部署模型,提出一种基于策略的工作流管理系统,并结合工作流系统的特点,提出了描述工作流策略语言,使用基于策略扩展的Petri网建立工作流过程模型的方法。基于该元模型的定义的工作流具有较好的灵活性,并对工作流的运行期实例的动态修改提供支持。
As the wide use of workflows, flexibility is new requirement of them. The ability of a workflow system depends greatly on the process meta model which is the heart of a workflow system. Referencing the concept of policy proposed by Internet Engineering Task Force, this paper proposes first a new process meta model based on policy, and then proposes a workflow policy language to describe the workflow process model, finally illustrates how to model the workflow process model using policy - enhanced Petri net. This process meta model is flexible and provides support for dynamic modifying to the workflow runtime instances.
出处
《计算机与数字工程》
2006年第9期52-55,92,共5页
Computer & Digital Engineering
