BPEL是基于XML的工作流定义语言，业务可以使用它来描述所用的复杂的业务流程并提供Web服务。

BPEL is an XML-based workflow definition language with which businesses can describe sophisticated business processes that use and provide Web services.

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网格工作流平台是实现网格计算的重要基础软件，而网格工作流描述语言则是定义和使用工作流的重要工具。

Grid workflow platform is a basic software to realize grid computing, and grid workflow language is a very important tool to define and use workflows.

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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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