工作流（workflow）就是工作流程的计算模型，即将工作流程中的工作如何前后组织在一起的逻辑和规则在计算机中以恰当的模型进行表示并对其实施计算(Workflow (workflow) is the computing model of workflow. It is about how the work process and the logic and rules before and after work are represented and calculated in the comp