This image shows an Expression Builder dialog with the following fields:

• Expression field with following text:

  dvm:lookupValue('citymap.dvm','CityCodes',$in.Customer/inp1:Customer/Address/City,'CityNames','NotFound')

• Variable list with City element selected.

• Functions List with lookupValue function selected.

• Content Preview field with dvm:lookupValue value.

• Description field containing text description of the dvm:lookupValue function.

• Help, OK, and Cancel buttons.