The format of the request string is as follows:
| String Element | Length (bytes) | Description |
|---|---|---|
| Function Code | 2 | Indicates the operation to be performed. Allowable values are as follows:
|
| Logoff flag | 1 | When set to binary 1, it indicates that the resolved sessions were to be logged off. Otherwise, set to binary zero. |
| Logical Host Id | 2 | Identifies the client submitting the request. |
| Coordinator length | 2 | Indicates the number of bytes in the subsequent coordinator string. |
| Coordinator | 30 max | Identifies the coordinator responsible for the in-doubt transactions that are to be listed, committed, or rolled back. |
| Number of numbers | 2 | Indicates the number of session numbers in the Session ID array. |
| Session number array | 4 per number | Contain the TDP-assigned session numbers of the sessions that are to be terminated. The array is used with function codes 3 and 5 only. For all other function codes, the array is empty. |