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diff --git a/helm/ocaml/content_pres/box.mli b/helm/ocaml/content_pres/box.mli
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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/.
+ *)
+
+(*************************************************************************)
+(*                                                                       *)
+(*                           PROJECT HELM                                *)
+(*                                                                       *)
+(*                Andrea Asperti <asperti@cs.unibo.it>                   *)
+(*                             13/2/2004                                 *)
+(*                                                                       *)
+(*************************************************************************)
+
+type 
+  'expr box =
+    Text of attr * string
+  | Space of attr
+  | Ink of attr
+  | H of attr * ('expr box) list
+  | V of attr * ('expr box) list
+  | HV of attr * ('expr box) list
+  | HOV of attr * ('expr box) list
+  | Object of attr * 'expr
+  | Action of attr * ('expr box) list
+
+and attr = (string option * string * string) list
+
+val get_attr: 'a box -> attr
+val set_attr: attr -> 'a box -> 'a box
+
+val smallskip : 'expr box
+val skip: 'expr box
+val indent : 'expr box -> 'expr box
+
+val box2xml:
+  obj2xml:('a -> Xml.token Stream.t) -> 'a box ->
+    Xml.token Stream.t
+
+val map: ('a -> 'b) -> 'a box -> 'b box
+
+(*
+val document_of_box :
+  ~obj2xml:('a -> Xml.token Stream.t) -> 'a box -> Xml.token Stream.t
+*)
+
+val b_h: attr -> 'expr box list -> 'expr box
+val b_v: attr -> 'expr box list -> 'expr box
+val b_hv: attr -> 'expr box list -> 'expr box  (** default indent and spacing *)
+val b_hov: attr -> 'expr box list -> 'expr box (** default indent and spacing *)
+val b_text: attr -> string -> 'expr box
+val b_object: 'expr -> 'expr box
+val b_indent: 'expr box -> 'expr box
+val b_space: 'expr box
+val b_kw: string -> 'expr box
+
+val pp_attr: attr -> string
+