--- /dev/null
+(***********************************************************************)
+(* *)
+(* TAToo *)
+(* *)
+(* Kim Nguyen, LRI UMR8623 *)
+(* Université Paris-Sud & CNRS *)
+(* *)
+(* Copyright 2010-2012 Université Paris-Sud and Centre National de la *)
+(* Recherche Scientifique. All rights reserved. This file is *)
+(* distributed under the terms of the GNU Lesser General Public *)
+(* License, with the special exception on linking described in file *)
+(* ../LICENSE. *)
+(* *)
+(***********************************************************************)
+
+(*
+ Time-stamp: <Last modified on 2013-01-30 19:07:38 CET by Kim Nguyen>
+*)
+
+include Hcons.Make (struct
+ include String
+ let hash s = Hashtbl.hash s
+ let equal s1 s2 = s1 = s2
+end)
+
+let print pp s = Format.fprintf pp "%s" s.node
+
+let of_string = make
+let to_string = node
+
+let document = of_string "#document"
+let text = of_string "#text"
+let cdata_section = of_string "#cdata-section"
+let comment = of_string "#comment"
+let document_fragment = of_string "#document-fragment"
+let attribute_map = of_string "#attribute-map"
+let nil = of_string "#"