| Segment | Ebene | Beschreibung | Opt/Mand. |
|---|
| UNH | 0 | A service segment starting and uniquely identifying a message. The message type code for the Modification of identity details message is SSIMOD. Note: Modification of identity details messages conforming to this document must contain the following data in segment UNH, composite S009: Data element 0065 SSIMOD D A UN | Mandatory |
| BGM | 0 | A segment identifying the function of the message (modification of data related to a worker) 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 used to identify the type of process to which the message belongs. | Mandatory |
| SG1 | 0 | SG1 | Mandatory |
| RFF | 1 | A segment giving 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 |
| IND | 1 | A segment identifying the index of the group. | Mandatory |
| FTX | 1 | Segment giving additional information on the worker. | Optional |
| SG3 | 1 | SG3 | Optional |
| PNA | 2 | A segment giving a person's surnames and forenames and his function in the message (worker). | Mandatory |
| ADR | 2 | A segment indicating current and/or previous address of the worker. | Optional |
| GIR | 2 | A segment specifying insurance or identification numbers of the worker in the country identified in the related PNA segment. | Optional |
| NAT | 2 | A segment specifying the nationality of the person identified in the related PNA segment. | Optional |
| DOC | 2 | A segment specifying the type and the number of an identity document (identity card or passport) belonging to the worker identified in the related PNA segment. | Optional |
| ATT | 2 | A segment indicating the worker's natural, professional or academic titles. | Optional |
| SG4 | 2 | SG4 | Optional |
| DTM | 3 | A segment indicating the date of birth or the date of death of the insured person. | Mandatory |
| ADR | 3 | 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 and/or death. | Optional |
| SG5 | 2 | SG5 | Optional |
| PDI | 3 | A segment specifying the insured person's gender and marital status (married, divorced,...). | Mandatory |
| DTM | 3 | A segment indicating relevant dates related to the civil status (date of marriage, date of divorce, ...). | Optional |
| SG6 | 0 | SG6 | Optional |
| AUT | 1 | A segment specifying the details of any authentication (validation) procedure applied to the SSIMOD 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 |
