Hi Experts,
We are working on SAP PO 7.5 single stack from File to S4HANA [IDOC] interfaces.
We have 3 interfaces where sample file for one of the interface looks like below.
Red circled fields are common for 3 interfaces and remaining fields out of red are different for each interface.

Also there is field named <INTERFACENAME> accordingly the interface should be selected and mapping should de done to same IDOC structure.
Can you please guide me to achieve this requirement, Thank you!
Regards,
Ramu.