This case-sensitive code system http://terminology.hl7.org/CodeSystem/v3-ResponseLevel defines the following codes in a Is-A hierarchy:
Code
Display
Definition
C
completion
Respond with exceptions and a notification of completion
D
detail
Respond with exceptions, completion, modifications and include more detail information (if applicable)
E
exception
Respond with exceptions only
F
confirmation
Respond with exceptions, completion, and modification with detail (as above), and send positive confirmations even if no modifications are being made.
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
R
modification
Respond with exceptions, completions and modifications or revisions done before completion