(* 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/.
 *)

(*  AUTOR: Ferruccio Guidi <fguidi@cs.unibo.it>
 *)

(* low level functions  *****************************************************)

(* these functions give the string representation used in the db  ----------*)

val string_of_position : MQGTypes.position -> string
val string_of_depth    : MQGTypes.depth -> string
val string_of_sort     : MQGTypes.sort -> string

(* these functions give the string representation used in MathQL  ----------*)

val mathql_of_position : MQGTypes.position -> string
val mathql_of_depth    : MQGTypes.depth -> string
val mathql_of_uri      : MQGTypes.uri -> string
val mathql_of_sort     : MQGTypes.sort -> string

val mathql_of_specs    : (string -> unit) -> MQGTypes.spec list -> unit

val position_of_mathql : string -> MQGTypes.position
val depth_of_mathql    : string -> MQGTypes.depth
val uri_of_mathql      : string -> MQGTypes.uri
val sort_of_mathql     : string -> MQGTypes.sort

(* high level functions  ****************************************************)

(* these functions give the textual representation used by umans  ----------*)

val text_of_position : MQGTypes.full_position -> string
val text_of_depth    : MQGTypes.full_position -> string -> string
val text_of_sort     : MQGTypes.sort -> string

(* these functions classify the positions  ---------------------------------*)

val is_main_position : MQGTypes.full_position -> bool
val is_conclusion    : MQGTypes.full_position -> bool

(* these function apply changes to positions  ------------------------------*)

val set_full_position : MQGTypes.full_position -> MQGTypes.optional_depth ->
                        MQGTypes.full_position
val set_main_position : MQGTypes.main_position -> MQGTypes.optional_depth ->
                        MQGTypes.main_position