| Field code | ACK_ID |
| Field description | Acknowledgement ID |
| Field type | Alphanumeric Length: 17 |
| Field rule | Free form In order to avoid errors, when exchanging information between various computer systems, it is not allowed to use characters from the extended ASCII character set (characters with umlauts or various accent-marks). |
| Dictionary field | Acknowledgment ID (An identifier to acknowledge a transaction or message) |
| EMDIS messages |
CBR_REQ IDM_REQ MSG_ACK RSV_REQ SMP_ARR SMP_REQ TYP_REQ WOR_REQ |
| WMDA XML fields related to dictionary field |