(* Copyright (C) 2004, 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://helm.cs.unibo.it/
 *)

type main_position =
  [ `MainConclusion of int option (* Pi depth *)
  | `MainHypothesis of int option (* Pi depth *)
  ]

type position =
  [ main_position
  | `InConclusion
  | `InHypothesis
  | `InBody
  ]

type pi_depth = int

type metadata =
  [ `Sort of Cic.sort * main_position
  | `Rel of main_position
  | `Obj of string * position
  ]

type constr =
  [ `Sort of Cic.sort * main_position list
  | `Rel of main_position list
  | `Obj of string * position list
  ]

let constr_of_metadata: metadata -> constr = function
  | `Sort (sort, pos) -> `Sort (sort, [pos])
  | `Rel pos -> `Rel [pos]
  | `Obj (uri, pos) -> `Obj (uri, [pos])

let sort_tbl = "refSort"
let rel_tbl = "refRel"
let obj_tbl = "refObj"
let owners_tbl = "owners"
let conclno_tbl = "no_inconcl_aux"
let conclno_hyp_tbl = "no_concl_hyp"
let name_tbl = "objectName"