论文参考工作流过程定义语言WPDL，充分考虑软件过程的特点，提出了一种软件过程定义语言SPDL。
Referring to WPDL and considering the properties of software processes, this article brings forward a software process definition language SPDLSPDL conforms to CMM standard.
然后集中阐述了工作流元模型和工作流过程定义语言XPDL，重点分析了工作流引擎的理论和核心调度机制。
Then the paper gives the details of XPDL and workflow meta-model, and analysis the core mechanism of workflow engine.
目前的工作流模型大部分都是从直觉出发，以图形语言或者文本语言来定义工作流过程。
Workflow processes of current majority workflow models are defined based on intuition of graphic language and scripting language.
目前的工作流模型大部分都是从直觉出发，以图形语言或者文本语言来定义工作流过程。
Workflow processes of current majority workflow models are defined based on intuition of graphic language and scripting language.
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