A BAPI/RFC transformation includes multiple groups. When a BAPI function contains a nested structure, ports for the input and output groups in a BAPI/RFC transformation use the following naming convention:

<group_name>_<parameter_name>_<field name>

For example:

SCALAR_INPUT_PARAM1_FIELD1

If there are multiple input or output structures, the BAPI/RFC transformation includes each structure parameter name in the port names. For example, BAPI Z_TST2 has the parameter INPUT1, which is of the type ZTYPE1. ZTYPE1 has several components such as FIELD1 and FIELD2. FIELD2 is a component of the type structure. It contains field F1. The naming convention in the BAPI/RFC transformation for FIELD 1 is:

SCALAR_INPUT_INPUT1_FIELD1

The naming convention in the BAPI/RFC transformation for the field F1 is:

SCALAR_INPUT_INPUT1_FIELD2_F1