Concepts 
This variant is technically an enhancement of the variant Single Flight Booking (Proxy-to-Proxy). The variant Single Flight Booking (with IDoc (AAE)) addresses most of the technical concepts that are addressed in the variants Single Flight Booking (with Proxy) and Booking a Single Flight (Proxy-to-IDoc) (using the “classic” IDoc adapter (IE) that runs on the Integration Engine).
More information:
As one exception to the variants mentioned above, this variant also addresses the IDoc adapter (AAE) as additional concept.
More information: Configuring the IDoc Adapter (Advanced Adapter Engine)
The process integration scenario is in the ES Repository under the name SingleFlightBooking (in the software component version SAP Basis 7.30, namespace http://sap.com/xi/XI/Demo/Agency). Navigate forward to find all the objects used by the process integration scenario (interface objects, mapping objects).
The airline that is integrated into the process by the IDoc adapter (AAE) uses IDocs to exchange messages.