Column Generator stage: Mapping tab
For the Column Generator stage, the Mapping tab allows you to specify how the output columns are derived, that is, how the generated data maps onto them.
The left pane shows the generated columns. These are read only and cannot be modified on this tab. These columns are automatically mapped onto the equivalent output columns.
The right pane shows the output columns for the output link. This has a Derivations field where you can specify how the column is derived. You can fill it in by dragging input columns over, or by using the Auto-match facility.
The right pane represents the data being output by the stage after the generate operation.