The Research of a New Workflow Model with Step-Task Layers Based on XML Documents

The research of workflow technology has been an active area for many years. Modeling of workflow is arguably the most important issue. In this paper, a workflow model with two layers named as S-T workflow model is created which is based on directed cyclic graph. We separate control node and task node in two layers. Step layer describes process control logic and task layer parallels concrete affairs to make the workflow clear. We address the modeling strategy at first, and then depict the features of S-T workflow model in detail, and propose arithmetic to verify the soundness of modeling structure. Besides, the parsing process of documents, and the design format of documents are also given in this paper