UML的表示逻辑，绘制屏幕导航，验证。

UML Drawing of Presentation Logic, Screen Navigation, Validation.

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当用户从主屏幕导航到CICS应用程序时，将某个全局变量设置为CICS。

Set a global variable to CICS when the user navigates from the main screen to the CICS application.

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类似地，您还可以在用户从主屏幕导航到TSO应用程序时设置一个全局变量。

Likewise, you will also set a global variable when the user navigates from the main screen to a TSO application.

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