--- /dev/null
+(* 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>
+ *)
+
+{
+ open MQGTopParser
+
+ let debug = false
+
+ let out s = if debug then prerr_endline s
+}
+
+let SPC = [' ' '\t' '\n']+
+let ALPHA = ['A'-'Z' 'a'-'z' '_']
+let NUM = ['0'-'9']
+let IDEN = ALPHA (NUM | ALPHA)*
+let QSTR = [^ '"' '\\']+
+
+rule comm_token = parse
+ | "(*" { comm_token lexbuf; comm_token lexbuf }
+ | "*)" { () }
+ | ['*' '('] { comm_token lexbuf }
+ | [^ '*' '(']* { comm_token lexbuf }
+and string_token = parse
+ | '"' { DQ }
+ | '\\' _ { STR (String.sub (Lexing.lexeme lexbuf) 1 1) }
+ | QSTR { STR (Lexing.lexeme lexbuf) }
+ | eof { EOF }
+and spec_token = parse
+ | "(*" { comm_token lexbuf; spec_token lexbuf }
+ | SPC { spec_token lexbuf }
+ | '"' { let str = qstr string_token lexbuf in
+ out ("STR " ^ str); STR str }
+ | '{' { out "LC"; LC }
+ | '}' { out "RC"; RC }
+ | ',' { out "CM"; CM }
+ | '$' { out "DL"; DL }
+ | "mustobj" { out "MOBJ" ; MOBJ }
+ | "mustsort" { out "MSORT" ; MSORT }
+ | "mustrel" { out "MREL" ; MREL }
+ | "onlyobj" { out "OOBJ" ; OOBJ }
+ | "onlysort" { out "OSORT" ; OSORT }
+ | "onlyrel" { out "OREL" ; OREL }
+ | "universe" { out "UNIV" ; UNIV }
+ | IDEN { let id = Lexing.lexeme lexbuf in
+ out ("ID " ^ id); ID id }
+ | eof { EOF }