1 (* Copyright (C) 2000, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
26 exception IllFormedXml of int;;
28 (* Utility functions that transform a Pxp attribute into something useful *)
30 let string_of_attr a =
31 let module T = Pxp_types in
34 | _ -> raise (IllFormedXml 0)
37 let module D = Pxp_document in
38 let module T = Theory in
39 let rec get_theory_elem n =
40 let ntype = n # node_type in
42 D.T_element "THEOREM" ->
43 let uri = string_of_attr (n # attribute "uri") in
45 | D.T_element "DEFINITION" ->
46 let uri = string_of_attr (n # attribute "uri") in
48 | D.T_element "AXIOM" ->
49 let uri = string_of_attr (n # attribute "uri") in
51 | D.T_element "VARIABLE" ->
52 let uri = string_of_attr (n # attribute "uri") in
54 | D.T_element "SECTION" ->
55 let uri = string_of_attr (n # attribute "uri")
56 and subtheory = List.map get_theory_elem (n # sub_nodes) in
57 T.Section (uri, subtheory)
58 | D.T_element _ | D.T_data | _ ->
59 raise (IllFormedXml 1)
61 match n # node_type with
62 D.T_element "Theory" ->
63 let uri = string_of_attr (n # attribute "uri") in
64 (uri, List.map get_theory_elem (n # sub_nodes))
65 | _ -> raise (IllFormedXml 2)