Filters represent the criteria that message types and BAPIs have to meet so that they can be distributed by ALE outbound processing.
On the basis of the filters ALE outbound processing determines the content and distribution of a message. In the distribution model filters are assigned to three things - message type, sending system and receiving logical system. A filter is always assigned to a Filter Group. The permitted filter type for BAPIs is currently the filter object.
Message types can be filtered using the following filter types: