What is an Authorisation failure? (Compared to an access control failure). What is a Service failure (compared to an access control failure)?
Proposal
Improve the explanations:
Authorisation failure: An association to the client could not be established due to an authorisation failure.
Access control failure: An data that the client wanted to access exists in the server, but based on the access view of the association with that client, an access to the data was refused.
Service violation: The data that the client wanted to access exists in the access view for the association with that client, but the requested service is not allowed.