This example covers Backstage expressions. This page demonstrates the capabilities of Backstage expressions in two ways.
Backstage Simple Expression Examples is a series of pages that preload some variables, and then references the variables on a following page.
Backstage Expressions Calculator is a page with a form field and a button that sends the expression to the Backstage Server to be evaluated.
For more information about Backstage expressions, see the Expressions chapter in the "Using Backstage Studio" manual.