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[helm.git] / helm / ocaml / mathql / mathQL.ml

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-(* 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://www.cs.unibo.it/helm/.
- *)
-
-(******************************************************************************)
-(*                                                                            *)
-(*                               PROJECT HELM                                 *)
-(*                                                                            *)
-(*                     Ferruccio Guidi <fguidi@cs.unibo.it>                   *)
-(*                     Irene Schena  <schena@cs.unibo.it>                     *)
-(*                                 10/09/2002                                 *)
-(*                                                                            *)
-(*                                                                            *)
-(******************************************************************************)
-
-
-(* output data structures ***************************************************)
-
-type path            = string * (string list) (* the name of an attribute *)
-
-type value           = string list            (* the value of an attribute *)
-
-type attribute       = path * value           (* an attribute *)
-
-type attribute_group = attribute list         (* a group of attributes *)
-
-type attribute_set   = attribute_group list   (* the attributes of an URI *)
-
-type resource        = string * attribute_set (* an attributed URI *)
-
-type resource_set    = resource list          (* the query result *)
-
-type result = resource_set
-
-
-(* input data structures ****************************************************)
-
-type svar = string (* the name of a variable for a resource set *)
-
-type rvar = string (* the name of a variable for a resource *)
-
-type vvar = string (* the name of a variable for an attribute value *)
-
-type inverse = bool 
-
-type refine = RefineExact
-            | RefineSub
-           | RefineSuper
-
-type assign = path * path 
-
-type set_exp = SVar of svar
-            | RVar of rvar
-             | Ref of val_exp
-             | Pattern of val_exp
-            | Relation of inverse * refine * path * set_exp * assign list
-             | Select of rvar * set_exp * boole_exp
-            | Union of set_exp * set_exp
-            | Intersect of set_exp * set_exp
-            | Diff of set_exp * set_exp
-            | LetSVar of svar * set_exp * set_exp
-            | LetVVar of vvar * val_exp * set_exp
-            
-and boole_exp = False
-              | True
-             | Not of boole_exp
-             | Ex of rvar list * boole_exp   
-             | And of boole_exp * boole_exp
-             | Or of boole_exp * boole_exp
-             | Sub of val_exp * val_exp
-             | Meet of val_exp * val_exp
-             | Eq of val_exp * val_exp
-              
-and val_exp = Const of string list 
-            | RefOf of set_exp 
-           | Record of rvar * path
-           | VVar of vvar
-           | Property of inverse * refine * path * val_exp
-           | Fun of string * val_exp
-
-type query = set_exp