Which of the following is not a valid choice for Object Wizard visibility expressions?

The visibility expressions in the Object Wizard of the AVEVA Application Server are designed to control the visibility of objects based on user selection or defined logic. Among the options provided, "triggers" are not a valid choice for visibility expressions.

In the context of visibility expressions, only certain types of objects – such as choice groups, options, and choices – can be used effectively to dictate the visibility of other UI components. Choice groups and options are typically utilized to enable or disable elements based on user interactions or specific selection criteria, making them valid and functional in controlling visibility. Similarly, choices can directly influence how and when objects appear in the user interface based on selections.

Triggers, on the other hand, are generally associated with event handling and do not serve the same purpose in dictating visibility rules within the Object Wizard framework. Therefore, they are not applicable in the context of visibility expressions, making this the correct distinction for the question.