
Extending Function Module Assignments (Direct Inbound)
Here you specify that your extended function module may process your extended basic type with a specific message. This involves enhancing the ALE registration of the function module.
Prerequisites
You must have completed the required steps for outbound processing in
Extending an IDoc Type .Procedure

In the example, the following objects are assigned to each other when you have made your entries:
Module |
IDOC_INPUT_ORDERS |
Basic type |
ORDERS01 |
Extension |
Z1ORDERS |
Message type |
ORDERS |
Object type |
BUS2032 (sales order) |