Why Use Expressions?

Expressions are used primarily for the following tasks:

• Customizing the User Interface and Administrator Interface forms. Forms use XPRESS to control the visibility of fields and to transform the data to be displayed.

• Defining flow of control in workflow. Workflow uses XPRESS to define transition conditions, which determine the order in which steps in the workflow process are performed.

• Implementing workflow actions. Workflow actions can be implemented using XPRESS. Action expressions can perform simple calculations, or call out to Java classes or JavaScript to perform a complex operation.

For information on using expressions in workflow scripts or editing forms, see Chapter 1, Workflow.