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diff --git a/helm/ocaml/mathql_interpreter/eval.ml b/helm/ocaml/mathql_interpreter/eval.ml
deleted file mode 100644
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--- a/helm/ocaml/mathql_interpreter/eval.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://cs.unibo.it/helm/.
- *)
-
-(*
- *
- *)
-
-open MathQL;;
-
-(*
- * conversione di un pattern
- *)
-let rec patterneval p =
- match p with
-   [] -> ""
- | head::tail ->
-    let h = match head with
-               MQBC (s) -> Str.global_replace (Str.regexp "\.") "\\\\\." s
-            |  MQBD -> "/"
-            |  MQBQ -> "[^/#]?"
-            |  MQBS -> "[^/#]*"
-            |  MQBSS -> "[^#]*"
-    in
-     h ^ (patterneval tail)
-;;
-
-(*
- * conversione di un fragment identifier
- *)
-let fieval fi =
-match fi with
-    [] -> ""
- |  MQFC i :: tail ->  
-     let s = "#xpointer\\\\(1/" ^ string_of_int (i) in
-      match tail with
-         [] -> s ^ "\\\\)"
-      |  MQFC j :: tail2 ->
-	  s ^ "/" ^ string_of_int j ^ "\\\\)"
-;;
-
-(*
- * valuta l'estensione
- *
- * 20/05/2002: non piu' necessario: l'estensione fa eventualmente
- * parte del pattern precedente
- *)
-let exteval ext =
- match ext with
-    "" -> ""
- |  _  -> ("\." ^ ext)
-;;
-
-(*
- * valuta il preambolo
- *)
-let preeval p =
- match p with 
-   Some s -> s
-;;
-
-(*
- * trasforma un pattern MathQL in un pattern postgresql
- *
- * si utilizzano espressioni regolari POSIX anziche' l'operatore
- * SQL standard LIKE perche' MathQL prevede esperssioni con "*"
- * e con "**".
- *)
-let pattern_match (preamble, pattern, fragid) =
- " ~ '" ^ (preeval preamble) ^ ":/" ^ (patterneval pattern) ^ (fieval fragid) ^ "'"
-;;
-