4.13.4 Predicate Summary

?X ^ :P

there exists an X such that P is provable (used in setof/3 and bagof/3)

bagof(?X,:P,-B)   ISO

B is the bag of instances of X such that P is provable

findall(?T,:G,-L)   ISO

findall(?T,:G,?L,?R)

L is the list of all solutions T for the goal G, concatenated with R or with the empty list

setof(?X,:P,-S)   ISO

S is the set of instances of X such that P is provable