| Code | Description | Nederlands (Dutch) | Comment | Version |
| a | Add/Insert | Toevoeging/invoeging | deprecated | added v2.3, removed after v2.5.1 |
| d | Delete | Verwijdering | deprecated | added v2.3, removed after v2.5.1 |
| u | Update | Update | deprecated | added v2.3, removed after v2.5.1 |
| x | No change | Geen wijziging | deprecated | added v2.5, removed after v2.5.1 |