Persists facts into a file
?- use_module(library(persist)).
true.
?- use_module(fixtures/friends).
true.
?- find_term(friend(jill, mark), friends).
false.
?- add_term(friend(jill, mark), friends).
true.
?- find_term(friend(jill, mark), friends).
true.
?- remove_term(friend(jill, mark), friends).
true.
?- find_term(friend(jill, mark), friends).
false.
See LICENSE