Research On Modeling For Dynamic Workflow Based On Component

With the practical application of workflow technoledge, people make more functional requirements, and one of the main problems is the dynamic and flexibility of workflow system. In traditional workflow, the process of work is divided into two stages, namely the establishment phase and the operational phase. Building phase is to get a workflow definition, and the operational phase is the implementation of workflow operational services to interprete and run workflow definition. However, a workflow in the running stage will change for the external environment changing or changes in user requirements , and therefore, the traditional workflow system has a certain limitations in the practical application for lack of dynamic and flexibility. How to make workflow system with flexible and adaptive capacity has become a hot research in dynamic workflow management system currently.For solving the dynamic problem in traditional workflow system, this paper raises a new workflow modelling method. With the guidance of component technology, raises a workflow modelling system architecture wich significantly enhances the dynamic capability and describtion capability of workflow models by introducing component thought. The concept of workflow component is raised, descript the formalized description and classification of the workflow components, through the workflow component database do unified registration, additon, deletion, or query operations; Making workflow components as a major constituent elements, details workflow modelling mechanisms workflow models correctness test.Changing requires of dynamics in workflows are studied and classified, the requires are divided into two stages (the establishment phase and the operational phase) and two objects (the workflow structure and the workflow activities). Then expound the supports for the dynamic changes for different circumstances based on workflow modelling architecture based on workflow components, including changes...