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/.
28 * implementazione del comando Relation
41 let get_prop_id propl =
42 let prop = List.hd propl in
43 if prop="refObj" then "F"
44 else if prop="backPointer" then "B"
49 let relation_ex rop path rset attl =
52 let usek = get_prop_id path in
53 let vvar = if attl = [] then "position"
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 ^ "'")) in
60 let qq = "select uri, context from t" ^ tv ^ " where prop_id='" ^ usek ^ "' order by uri asc" in
61 let res = c#exec qq in
64 [uri;context] -> [(uri,[[(vvar,[context])]])]
71 let rec edup = function
73 | rs1::tl -> union_ex rs1 (edup tl)
80 (**** IMPLEMENTAZIONE DELLA RELATION PER GALAX ****)
83 (* trasforma un uri in un filename *)
85 if String.contains uri ':' then
86 (let len = String.length uri in
87 let scuri = String.sub uri 4 (len-4) in (*tolgo cic:*)
88 if String.contains scuri '#' then
89 (let pos = String.index scuri '#' in
90 let s1 = Str.string_before scuri pos in
91 let xp = Str.string_after scuri pos in
92 let xp = Str.global_replace (Str.regexp "#xpointer(1") "" xp in
93 let xp = Str.global_replace (Str.regexp "\/") "," xp in
94 let xp = Str.global_replace (Str.regexp ")") "" xp in
95 let fname = (s1 ^ xp) in
102 (* prende una lista di uri (contenente alternativamente uri e pos) e costruisce una lista di resource *)
103 let rec rsetl uril vvar =
105 | uri::tl -> let scuri = (*tofname*) uri in
106 [(scuri, [[(vvar, [(List.hd tl)])]])]::(rsetl (List.tl tl) vvar)
110 (* prende una resource e una vvar e restituisce la lista delle resource in relazione (refObj o backPointer in base al parametro "path") con tale resource e associa alla proprieta' il nome della vvar contenuto in "attl" *)
111 let muse path attl r =
114 let vvar = if attl = [] then "position"
118 let furi = tofname uri in
119 let dtag = List.hd path in
122 "refObj" -> "/projects/helm/metadata/create4/forward"
123 | _ -> "/projects/helm/metadata/create4/backward"
125 let xq ="namespace h=\"http://www.cs.unibo.it/helm/schemas/mattone.rdf#\"
126 namespace rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"
127 for $i in document(" ^ "\"" ^ dir ^ furi ^ ".xml" ^ "\"" ^
128 ")/rdf:RDF/h:Object/h:" ^ dtag ^ "/h:Occurrence
129 return ($i/h:occurrence, $i/h:position)"
132 let uril = Toputils.eval_query_string xq in (* e' una lista di liste di stringhe*)
133 let hd_uril = List.hd uril in(*prendo la testa che contiene altern. lista di uri e pos. *)
134 let rset_list = rsetl hd_uril vvar in (* da hd_uril costruisco una lista di resource_set(singoletti)*)
135 let rec edup = function
137 | rs1::tl -> union_ex rs1 (edup tl)
144 (* prende un resource_set, una vvar (primo el. di attl) a cui associare la posizione, e la relazione (refObj o backPointer) e per ogni resource chiama la muse
145 NOTA: "rop" per ora non viene usato perche' vale sempre "ExactOp" *)
146 let relation_galax_ex rop path rset attl =
147 List.stable_sort (fun (uri1,l1) (uri2,l2) -> compare uri1 uri2) (List.concat (List.map (muse path attl) rset))