Administrative Sex
| Code | Description | Deutsch (German) | Nederlands (Dutch) | Comment | Version |
| A | Ambiguous | mehrdeutig | Ambigu | | added v2.4 |
| F | Female | weiblich | Vrouw | | from v2.1 |
| M | Male | männlich | Man | | from v2.1 |
| N | Not applicable | nicht zutreffend | Niet van toepassing | | added v2.4 |
| O | Other | andere | Anders | | from v2.1 |
| U | Unknown | unbekannt | Onbekend | | from v2.1 |