An workflow process model was proposed with relative workflow instance model and change model. A new transferring policy was also presented.
提出了一种支持演进变化的工作流过程模型及相关的实例模型和修改模型，并在此基础上提出了一种新的迁移策略。
Through the hierarchical research of workflow process model, it is put forward three levels of workflow process models: meta model level, model level and control model level.
对工作流过程模型进行分层研究，提出了三层架构的工作流过程模型：元模型层、模型层和控制模型层。
Through the hierarchical research of workflow process model, it is put forward three levels of workflow process models: meta model level, model level and control model level.
对工作流过程模型进行分层研究，提出了三层架构的工作流过程模型：元模型层、模型层和控制模型层。
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