SAP Defining the partner profile for ALE IDOC

The transaction WE20 is used to set up the partner profile.

WE20 :

The profiles are defined with transaction WE20, which is also found in the EDI master menu WEDI. From there you need to specify partner and partner type and whether you define a profile for inbound or outbound. Additionally, you may assign the profile to a NAST message type.

Partner type :

e.g. : LI=Supplier ,CU=Customer, LS=Logical system

The partner type defines from which master data set the partner number originates.
The partner types are the ones which are used in the standard applications for SD, MM or FI. The most important types for EDI are LI (=Lieferant, supplier), CU (Customer) or LS (Logical system). The logical system is of special interest when you exchange data with computer subsystems via ALE or other RFC means.

Inbound and outbound definitions :

For every partner and every direction of communication, whether you receive or send IDocs, a different profile is maintained. The inbound profile defines the processing routine. The outbound profile defines mainly the target, where to send the data .

Link message type to outbound profile :

If you send IDocs out of an application’s messaging, i.e. a communication via the NAST table, then you have to link the message type with an IDoc profile. This is also done in transaction WE20.

Inbound profiles determine the processing logic :

The processing code is a logical name for the processing function module or object method. The processing code is used to uniquely determine a function module that will process the received IDoc data. The inbound profile will point to a processing code.