| Segment | Ebene | Beschreibung | Opt/Mand. |
|---|
| UNH | 0 | A service segment starting and uniquely identifying a message. The message type code for the Notification of registration of a worker message is SSREGW. Note: Notification of registration of a worker messages conforming to this document must contain the following data in segment UNH, composite S009: Data element 0065 SSREGW D A UN | Mandatory |
| BGM | 0 | A segment to identify the type and the function of the message (registration, confirmation of registration, request of details on a worker's Social Security insurance record, answer to this request, ...) and, if necessary, the number of the message. | Mandatory |
| DTM | 0 | A segment indicating the date of preparation of the message. | Optional |
| GEI | 0 | A segment indicating the type of process the message belongs to. | Mandatory |
| SG1 | 0 | SG1 | Mandatory |
| RFF | 1 | A segment identifying the reference of a previously sent or received message related to the current message. | Mandatory |
| DTM | 1 | A segment indicating the date of a previous message whose reference is given in the above RFF segment. | Optional |
| SG2 | 0 | SG2 | Optional |
| PNA | 1 | A segment giving a person's surnames and forenames and his function in the message (worker, worker's mother, father, spouse). | Mandatory |
| GIR | 1 | A segment indicating the Insurance or identification numbers of the worker in the country identified in the related PNA segment. | Optional |
| NAT | 1 | A segment indicating the nationality of the person identified in the related PNA segment. | Optional |
| DOC | 1 | A segment specifying the type and the number of an identity document (identity card or passport) belonging to the person identified in the related PNA segment. | Optional |
| ADR | 1 | A segment indicating current and if relevant, the previous address of the person. | Optional |
| ATT | 1 | A segment specifying person's natural, professional or academic titles. | Optional |
| SG3 | 1 | SG3 | Optional |
| DTM | 2 | A segment indicating date of birth or date of death of the person. | Mandatory |
| ADR | 2 | A segment indicating place of birth or place of death. This segment can be used to identify the country, province or department and city of birth or death. | Optional |
| SG4 | 1 | SG4 | Optional |
| PDI | 2 | A segment specifying the gender or the marital status (married, divorced, ...) of the person identified in the related PNA segment. | Mandatory |
| DTM | 2 | A segment indicating relevant dates related to the civil status (date of marriage or date of divorce, ...). | Optional |
| FTX | 0 | A segment giving additional information on the worker. | Optional |
| SG5 | 0 | SG5 | Optional |
| AUT | 1 | A segment specifying the details of any authentication (validation) procedure applied to the SSREGW message. | Mandatory |
| DTM | 1 | A segment identifying the date and where necessary, the time of authentication. | Optional |
| UNT | 0 | A service segment ending a message, giving the total number of segments in the message (including the UNH & UNT) and the control reference number of the message. | Mandatory |
