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.
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15 * GNU General Public License for more details.
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19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://www.cs.unibo.it/helm/.
30 * implementazione del comando Relation
34 let get_prop_id propl =
35 let prop = List.hd propl in
36 if prop="refObj" then "F"
37 else if prop="backPointer" then "B"
43 let relation_ex rop path rset attl =
46 let usek = get_prop_id path in
48 let vvar = if attl = [] then "position"
51 (*let (uril,atts) = List.split rset in*)
52 let _ = print_string ("RELATION "^usek)
53 and t = Unix.time () in
57 let rset_list = (* lista di singoletti:resource_set di un elemento *)
58 (List.fold_left (fun acc (uri,l) ->
59 let tv = pgresult_to_string (c#exec ("select id from registry where uri='" ^ uri ^ "'"))
61 let qq = "select uri, context from t" ^ tv ^ " where prop_id='" ^ usek ^ "' order by uri asc"
63 let res = c#exec qq in
66 (function [uri;context] -> [(uri,[[(vvar,[context])]])]
73 let rec edup = function
75 | rs1::tl -> union_ex rs1 (edup tl)
81 print_string (" = " ^ string_of_int (List.length result) ^ ": ") ;
82 print_endline (string_of_float (Unix.time () -. t) ^ "s") ;