In the 4th chapter, we build a simple high-level workflow modeling language-M4L, which is used to describe the plat independent model based on multi meta-model.
第四章，构造一个简单的高层次描述语言m4l，使用它描述基于多元模型的平台无关的工作流模型。
At present, most processes of workflow modeling can not describe the essential characteristics of workflow, but UML is a visualized modeling language.
指出目前大部分工作流建模过程无法对工作流本质特征进行描述，而UML是一种可视化的建模语言。
In workflow management system, process description language and process modeling tool are needed to abstract the business processes.
在工作流系统中，对业务过程的抽象需要过程描述语言和过程建模工具的支持。
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