2 ||M|| This file is part of HELM, an Hypertextual, Electronic
3 ||A|| Library of Mathematics, developed at the Computer Science
4 ||T|| Department, University of Bologna, Italy.
6 ||T|| HELM is free software; you can redistribute it and/or
7 ||A|| modify it under the terms of the GNU General Public License
8 \ / version 2 or (at your option) any later version.
9 \ / This software is distributed as is, NO WARRANTY.
10 V_______________________________________________________________ *)
17 let env = UH.create hsize
19 (* Interface functions ******************************************************)
22 let set_entity entity =
23 let _, _, uri, _ = entity in
24 UH.add env uri entity; entity
27 try UH.find env uri with Not_found -> E.empty_root, E.empty_node, uri, E.Void