Mapplet Transformation Output Fields
When you select a mapplet to use in a Mapping transformation, the mapplet output fields appear on the Output Fields tab of the Properties panel.
The Mapping Designer displays the name, type, precision, scale, and origin for each output field in each output group. You cannot edit the transformation output fields. If you want to exclude output fields from the data flow or rename output fields before you pass them to a downstream transformation, configure the field rules for the downstream transformation.