| Level | Code | Display | Definition |
| 1 | C | completion |
Respond with exceptions and a notification of completion
|
| 1 | D | detail |
Respond with exceptions, completion, modifications and include more detail information (if applicable)
|
| 1 | E | exception |
Respond with exceptions only
|
| 1 | F | confirmation |
Respond with exceptions, completion, and modification with detail (as above), and send positive confirmations even if no modifications are being made.
|
| 1 | N | message-control |
Respond only with message level acknowledgements, i.e., only notify acceptance or rejection of the message, do not include any application-level detail
|
| 1 | R | modification |
Respond with exceptions, completions and modifications or revisions done before completion
|
| 1 | X | none |
Do not send any kind of response
|