4.16.4 Query Handling Predicates

ask_query(+QueryClass, +Query, +Help, -Answer)   hookable

Prints the question Query, then reads and processes user input according to QueryClass, and returns the result of the processing, the abstract answer term Answer. The Help message is printed in case of invalid input. See mpg-ref-ask_query.

query_hook(+QueryClass, +Query, +QueryLines, +Help, +HelpLines, -Answer)   hook

user:query_hook(+QueryClass, +Query, +QueryLines, +Help, +HelpLines, -Answer)

Called by ask_query/4 before processing the query. If this predicate succeeds, then it is assumed that the query has been processed and nothing further is done.

query_class_hook(+QueryClass, -Prompt, -InputMethod, -MapMethod, -FailureMode)   hook

user:query_class_hook(+QueryClass, -Prompt, -InputMethod, -MapMethod, -FailureMode)

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 changed.

'SU_messages':query_class(+QueryClass, -Prompt, -InputMethod, -MapMethod, -FailureMode)   hook

Predefined query class characteristics table.

'SU_messages':query_abbreviation(+QueryClass, -Prompt, -Pairs)   hook

Predefined query abbreviation table.

query_input_hook(+InputMethod, +Prompt, -RawInput)   hook

user:query_input_hook(+InputMethod, +Prompt, -RawInput)

Provides the user with a method of overriding the call to 'SU_messages':query_input/3 in the input phase of query processing. This way the implementation of the default input methods can be changed.

'SU_messages':query_input(+InputMethod, +Prompt, -RawInput)   hook

Predefined query input methods.

query_map_hook(+MapMethod, +RawInput, -Result, -Answer)   hook

user:query_map_hook(+MapMethod, +RawInput, -Result, -Answer)

Provides the user with a method of overriding the call to 'SU_messages':query_map/4 in the mapping phase of query processing. This way the implementation of the default map methods can be changed.

'SU_messages':query_map(+MapMethod, +RawInput, -Result, -Answer)   hook

Predefined query map methods.