The messages exchanged between systems are of various message types. The message type depends on the data contained and the process involved. It determines the technical structure of the message, the IDoc type. For example, the FIDCMT message type is used for journal messages. The IDoc type indicates the SAP format that is to be used to interpret the data of a business transaction. An IDoc type consists of the following components: · a control record
This is identical for each IDoc type. · several data records
One data record consists of a fixed key part and a variable data part. The data part is interpreted using segments, which differ depending on the IDoc type selected. · several status records
These are identical for each IDoc type and describe the statuses an IDoc has already passed through or the status an IDoc has attained. | 
