Taking account of those problems , the author imported uml into the description of work flow and expanded it according to its features , and also put forward the idea of work flow modeling of super activity graph based on the uml activity graph . this idea not only had the features and advantages of the uml activity graph , but also improved the descriptive ability of complicated control condition to make it more suitable for work flow modeling , allowing for the influence of outside accidents , temporal sequence and operation control on the work flow operation path 针对以上问题，作者将uml引入工作流模型描述，并针对工作流的特点对其进行扩展，提出了基于uml活动图的活动超图的工作流建模思想，这种思想不仅具有uml活动图的特征和优点，还着重考虑了外部事件、时序以及运算控制对工作流运行路径的影响，提高了复杂控制条件的描述能力，使其更适合工作流建模。
