Within the current account system, what are known as events (Business Transaction Events) are available that enable you to enhance the function of the system without making modifications. These events are also known as Publish & Subscribe interfaces or informative interfaces.

The Publish & Subscribe interface describes a point in time in the standard application at which a certain amount of data is made available to an external software. An additional action can also be triggered. , several additional components that do not affect each other can run one after the other.

The standard functions of the current account system are not sufficient in all cases to meet certain customer-specific requirements. The large quantity and heterogenic quality of such requirements means that it is often not meaningful to enhance the standard system accordingly.

On the other hand, for reasons of expense and stability, modifications to the standard system must be avoided or at least kept to a minimum. This can be achieved by the creation of an infrastructure that enables you to enhance functions without having to modify the standard system. This infrastructure is available in the area of current accounts for some typical forms of enhancement. With the help of the events, all customers are able to individually and dynamically adjust the system to meet their requirements, without having profound technical knowledge and without making modifications.

For this, at the event, the system transfers data to the function module by means of an interface. In accordance with a predefined interface, this can also return data to the current account system.

You can link three types of additional components at every event:

• SAP components
• Function modules from software partners
• Self-developed function modules

Publish & Subscribe interfaces inform you that certain events have taken place in the current account system and make the data created or changed by them available. Further processing can be triggered as a result of these events and data.

At every event it is possible to have as much additional processing taking place as you want. Appropriate usage is available to every single SAP customer.

For every event, SAP supplies sample function modules (SAMPLES) that describe the interface and can serve as template for the modules to be developed. If you wish to make use of a SAMPLE, copy it into your name range and finish programming it.

The interfaces defined in accordance with the event technique relate to all operations within the current account system.

You can find all necessary information and Customizing activities you need to make use of the events in the Implementation Guide (IMG) by choosing Basic settings ® Business Transaction Events / Event control.

What Publish & Subscribe interfaces cannot do:

The events do not cover the following points:

• Trigger processes in the current account system by other, also external, systems. You must provide this functionality by means of BAPIs.
• The transfer of additional data into standard objects.
• The technique is not suitable for customers or partners to create their own interfaces.