INDEX | CLUSTER | FEATURES | SHORT | FRAMES | NO FRAMES |
-- Is current set a subset of `other'?
-- Is current set a superset of `other'?
-- Do current set and `other' have no
-- items in common?
-- New structure containing min (`n', `count')
-- items from current structure
-- Remove all items not in `other'.
-- Add all items of `other'.
-- Remove all items also in `other'.
-- Remove all items also in `other', and add all
-- items of `other' not already present.
INDEX | CLUSTER | FEATURES | SHORT | FRAMES | NO FRAMES |