| Element/Gruppe | No/Code | Beschreibung | Opt/Mand. |
|---|
| Gruppe | S001 | Identification of the agency controlling the syntax, the syntax level and version number, and the service code directory. | Mandatory |
| Gruppe | S002 | Identification of the sender of the interchange. | Mandatory |
| Gruppe | S003 | Identification of the recipient of the interchange. | Mandatory |
| Gruppe | S004 | Date and time of preparation of the interchange. | Mandatory |
| Element | 0020 | Unique reference assigned by the sender to an interchange. | Mandatory |
| Gruppe | S005 | Reference or password as agreed between the communicating partners. | Optional |
| Element | 0026 | Identification of the application area assigned by the sender, to which the messages in the interchange relate e.g. the message type, if all the messages in the interchange are of the same type. | Optional |
| Element | 0029 | Code determined by the sender requesting processing priority for the interchange. | Optional |
| Element | 0031 | Code requesting acknowledgement for the interchange. | Optional |
| Element | 0032 | Identification by name or code of the type of agreement under which the interchange takes place. | Optional |
| Element | 0035 | Indication that the structural level containing the test indicator is a test. | Optional |
