Booking a Single Flight (Proxy-to-IDoc AAE Communication) 
The most important characteristics of this variant of the process integration scenario SingleFlightBooking are: asynchronous message exchange, uses mappings, uses proxy runtime and the IDoc adapter (Advanced Adapter Engine).
Ther IDoc adapter (Advanced Adapter Engine) — also referred to as IDoc adapter (AAE) for short — is part of the Advanced Adapter Engine and allows the setup of scenarios based on IDoc exchange, even in cases when the Integration Engine is not involved in message processing.
Note
This is in particular important when you use the installation option Advanced Adapter Engine Extended (AEX).
This section contains the following information:
An overview of the technical concepts that are addressed in this process integration scenario.
Configuring a Process Integration Scenario
An overview of the most important configuration steps with references to the detailed descriptions in the configuration instructions for the demo examples. You have to configure the process integration scenario before you can execute it.