(*
    ||M||  This file is part of HELM, an Hypertextual, Electronic        
    ||A||  Library of Mathematics, developed at the Computer Science     
    ||T||  Department, University of Bologna, Italy.                     
    ||I||                                                                
    ||T||  HELM is free software; you can redistribute it and/or         
    ||A||  modify it under the terms of the GNU General Public License   
    \   /  version 2 or (at your option) any later version.              
     \ /   This software is distributed as is, NO WARRANTY.              
      V_______________________________________________________________ *)

type graph

val set_sorts: string list -> int -> int

val get_sort: (unit -> 'a) -> (string -> 'a) -> int -> 'a

val graph_of_string: (unit -> 'a) -> (graph -> 'a) -> string -> 'a

val string_of_graph: graph -> string

val apply: graph -> int -> int