val transition : t -> state -> label -> formula
(** Give the formula which must hold for a current state and label *)
-val transitions : t -> state -> ((label*formula) list)*((label*formula) list)
+val transitions : t -> state -> (label*formula) list * (label*formula) list
(** Give the list of labels and formulae from queries and recognizing
transitions for a given state *)
+val transitions_lab : t -> QName.t -> (state*formula) list *(state*formula) list
+(** Give the list of states and formulae from queries and recognizing
+ transitions for a given tag *)
+
val empty : t
(** The empty automaton *)