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.
12 * HELM is distributed in the hope that it will be useful,
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/.
26 (******************************************************************************)
30 (* Ferruccio Guidi <fguidi@cs.unibo.it> *)
31 (* Domenico Lordi <lordi@cs.unibo.it> *)
35 (******************************************************************************)
37 exception MQInvalidURI of string
38 exception MQConnectionFailed of string
39 exception MQInvalidConnection of string
41 (* Input types **************************************************************)
42 (* main type is mquery *)
44 type mqrvar = string (* name *)
46 type mqsvar = string (* name *)
49 | MQString of string (* a constant string *)
50 | MQSlash (* a slash: '/' *)
51 | MQAnyChr (* Any single character: '?' *)
52 | MQAst (* single asterisk: '*' *)
53 | MQAstAst (* double asterisk: '**' *)
55 type mqup = mquptoken list (* uri pattern (helper) *)
57 type mqfi = int option * int option
59 type mqtref = string * mqup * mqfi (* HELM preamble,
61 fragment identifier *)
63 type mqpattern = mqtref (* constant pattern *)
89 | MQCons of string (* constant *)
90 | MQFunc of mqfunc * mqrvar (* function, rvar *)
91 | MQRVar of mqrvar (* rvar *)
92 | MQSVar of mqsvar (* svar *)
93 | MQMConclusion (* main conclusion *)
94 | MQConclusion (* inner conclusion *)
103 | MQAnd of mqbool * mqbool
104 | MQOr of mqbool * mqbool
106 | MQIs of mqstring * mqstring (* operands *)
107 | MQSetEqual of mqlist * mqlist (* the two lists denote the *)
109 | MQSubset of mqlist * mqlist (* the two lists denote two *)
110 (* sets, the first one *)
111 (* subsect of the second one. *)
114 | MQSelect of mqrvar * mqlist * mqbool (* rvar, list, boolean *)
115 | MQUse of mqlist * mqsvar (* list, Position attribute *)
116 | MQUsedBy of mqlist * mqsvar (* list, Position attribute *)
117 | MQPattern of mqpattern (* pattern *)
118 | MQUnion of mqlist * mqlist (* *)
119 | MQDiff of mqlist * mqlist (* *)
120 | MQIntersect of mqlist * mqlist (* *)
121 | MQSortedBy of mqlist * mqorder * mqfunc (* *)
122 | MQRVarOccur of mqrvar
127 (* Output types *************************************************************)
128 (* main type is mqresult *)
130 type mquref = UriManager.uri * mqfi (* uri, fragment identifier *)
132 type mqrefs = mqtref list (* list of references (helper) *)