After you import an SAP function, use it in the Application Source Qualifier to help you extract source data. You insert SAP functions in the ABAP program flow and assign values to function parameters.

You assign values and variables to SAP function parameters in the ABAP Program Flow dialog box. You first assign values to the scalar input parameters so the SAP function can use them to perform calculations. You then assign variables to scalar output parameters to hold the return values of the function. If the SAP function contains table or changing parameters, you also assign variables to those parameters.

You can configure the Designer to create an output port in the Application Source Qualifier so you can use the values of function parameters later in the mapping.