1 (* Copyright (C) 2000, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
27 type position = string
31 type spec = MustObj of uri list * position list * depth list
32 | MustSort of sort list * position list * depth list
33 | MustRel of position list * depth list
34 | OnlyObj of uri list * position list * depth list
35 | OnlySort of sort list * position list * depth list
36 | OnlyRel of position list * depth list
37 | Universe of position list
39 val locate : string -> MathQL.query
41 val compose : spec list -> MathQL.query
43 val builtin : MathQL.vvar -> string
45 (* interface for the old constraints ***************************************)
47 type old_depth = int option
49 type r_obj = uri * position * old_depth
50 type r_rel = position * old_depth
51 type r_sort = position * old_depth * sort
53 type must_restrictions = (r_obj list * r_rel list * r_sort list)
54 type only_restrictions =
55 (r_obj list option * r_rel list option * r_sort list option)
56 type universe = position list option
58 val query_of_constraints : universe -> must_restrictions -> only_restrictions -> MathQL.query