(* Copyright (C) 2000, HELM Team.                                              
 *                                                                             
 * This file is part of HELM, an Hypertextual, Electronic                      
 * Library of Mathematics, developed at the Computer Science                   
 * Department, University of Bologna, Italy.                                   
 *                                                                             
 * HELM is free software; you can redistribute it and/or                       
 * modify it under the terms of the GNU General Public License                 
 * as published by the Free Software Foundation; either version 2              
 * of the License, or (at your option) any later version.                      
 *                                                                             
 * HELM is distributed in the hope that it will be useful,                     
 * but WITHOUT ANY WARRANTY; without even the implied warranty of              
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               
 * GNU General Public License for more details.                                
 *                                                                             
 * You should have received a copy of the GNU General Public License           
 * along with HELM; if not, write to the Free Software                         
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,                      
 * MA  02111-1307, USA.                                                        
 *                                                                             
 * For details, see the HELM World-Wide-Web page,                              
 * http://cs.unibo.it/helm/.                                                   
 *)

(** traverses recursively a type and lists the referenced universes 
 *  skipping uri (that should be the object we are working on and 
 *  that can't be in the environment since we are in a Qed-like state) 
 *)
val universes_of_obj: 
  UriManager.uri -> Cic.obj -> CicUniv.universe list


  (** cleans the universe graph for a given object and fills universes with URI.
  * to be used on qed
  *)
val clean_and_fill:
  UriManager.uri -> Cic.obj -> CicUniv.universe_graph ->
    CicUniv.universe_graph