This image displays an Expression Builder dialog with a Variables element inserted in the Expression field. The Expression Builder dialog contains following components:

• Expression field with following value:

  $in.Customer/imp1:Customer/CustomerId

• Variable list with CustomerId element selected.

• Functions List with equals function selected.

• Content Preview field with full expression for the CustomerId element.

• Description field containing text description of the equals function.

• Help, OK, and Cancel buttons.