PROLOG LIST-HANDLING PREDICATES
              Contributed by J.G. Forero, Reading University
                  Shelved on the 21st of December 1987


This entry contains some list-handling predicates contributed by Jorge
Forero.


The predicates' functions are: test for list-ness; test for sublist;
find element at known position, or position of known element; remove
duplicates; flatten a list; add element after known element; find that
part of a list following a given element.


SIZE : 4 kilobytes.

CHECKED ON EDINBURGH-COMPATIBLE (POPLOG) PROLOG : yes.

PORTABILITY : no known problems.

INTERNAL DOCUMENTATION : comments for each predicate.