Whenever a controller needs the current state of the user interface, it can use the view_state method to reference the view's copy of the model and the current transfer object.

每当控制器需要用户界面的当前状态时，它可以使用view_state方法来引用视图的模型副本和当前的传输对象。

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This paper first researched the reference model of workflow and explained every main element and interface of Workflow managment system.

本文首先通过研究工作流参考模型，阐述工作流体系结构中的各主要构件与接口。

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Metadata is the key to a simpler programming model, and eliminates the need for Interface Definition Language (IDL) files, header files, or any external method of component reference.

对于一种更简单的编程模型来说，元数据是关键，该模型不再需要接口定义语言(IDL)文件、头文件或任何外部组件引用方法。

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