:- multifile user:query_class_hook/5.
Provides the user with a method of overriding the call to
'SU_messages':query_class/5 in the preparation phase of query
processing. This way the default query class characteristics can be
Determines the allowed values for the atom Answer.
The prompt to display at the terminal.
The input method to use.
The map method to use.
The failure mode to use.
All error handling is done by the predicates extended by this hook.