Moved PDDL example instances to subdirectory.

instances/PDDL/ipc-1998-gripper/domain.pddl

@@ -0,0 +1,34 @@
+(define (domain gripper-strips)
+   (:predicates (room ?r)
+		(ball ?b)
+		(gripper ?g)
+		(at-robby ?r)
+		(at ?b ?r)
+		(free ?g)
+		(carry ?o ?g))
+
+   (:action move
+       :parameters  (?from ?to)
+       :precondition (and  (room ?from) (room ?to) (at-robby ?from))
+       :effect (and  (at-robby ?to)
+		     (not (at-robby ?from))))
+
+
+
+   (:action pick
+       :parameters (?obj ?room ?gripper)
+       :precondition  (and  (ball ?obj) (room ?room) (gripper ?gripper)
+			    (at ?obj ?room) (at-robby ?room) (free ?gripper))
+       :effect (and (carry ?obj ?gripper)
+		    (not (at ?obj ?room)) 
+		    (not (free ?gripper))))
+
+
+   (:action drop
+       :parameters  (?obj  ?room ?gripper)
+       :precondition  (and  (ball ?obj) (room ?room) (gripper ?gripper)
+			    (carry ?obj ?gripper) (at-robby ?room))
+       :effect (and (at ?obj ?room)
+		    (free ?gripper)
+		    (not (carry ?obj ?gripper)))))
+