A new approach, using simp_of_act and simp_of_set to activate definitions when
necessary
(* Title: HOLCF/Lift2.thy
ID: $Id$
Author: Olaf Mueller
Copyright 1996 Technische Universitaet Muenchen
Class Instance lift::(term)po
*)
Lift2 = Lift1 +
instance "lift" :: (term)po (refl_less_lift,antisym_less_lift,trans_less_lift)
end