> ### 5.6 Expressions in Interstage Business Process Manager

> The expressions used in Interstage BPM are standard JavaScript expressions. They are used in the following Interstage BPM features:

> · Java Actions
> · Triggers
> · Complex Condition Node

> Several software controls are provided by Interstage BPM to help you build expressions more effectively and easily. These are:

> · Expression Builder: This dialog box is displayed by clicking the Expression Builder button. You can build expressions by selecting expression constants or variables from drop-down lists and clicking operators.
> · Expression Display Field: The expression is displayed in this field after it has been built or typed in.
> · Expression Mode Button: This button has three modes corresponding to three different expression modes. The three modes are:
> Constant Mode (button displays a "C"): used for simple constant (literal) expressions
> Variable Mode (button displays a "V"): used for simple variable (user-defined attribute) expressions
> Expression Mode (button displays an "E"): used for complex expressions

> All of these software controls are explained in detail in this section. These controls are used as needed and as appropriate in the Java Actions, Triggers, and Complex Condition Node features.

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