Thank you for your response. But your response is nothing to do with me. * character in SELECT clause means all variables bound in WHERE clause. So my test query works well on SPARQL endpoint even if I do not use "SELECT ?x" instead of "SELECT *".
Please let me know how to figure out encoding problem when query string contains Korean characters. Sincerely yours, Myungjin Lee -----Original Message----- From: Miguel Bento Alves [mailto:[email protected]] Sent: Thursday, November 06, 2014 6:41 PM To: [email protected] Subject: Re: Problem SPARQL query encoding Hi, you only can get the variables that are in Select clause. Try this and will work: …. String allSameAsQuery = "" + "PREFIX owl: <http://www.w3.org/2002/07/owl#>\n" + "SELECT ?x\n" + "WHERE {\n" + " <http://ko.dbpedia.org/resource/문절망둑> owl:sameAs ?x .\n" + "}"; …. "SELECT ?x” instead of "SELECT *” Miguel > On 06 Nov 2014, at 09:29, 이명진 <[email protected]> wrote: > > Thank you for your response. > > My question is that my test code does not work if SPARQL query has Korean > characters because query string is encoded. > My test code is: > > String dbpediKoEndpoint = "http://ko.dbpedia.org/sparql";; > String allSameAsQuery = "" > + "PREFIX owl: <http://www.w3.org/2002/07/owl#>\n" > + "SELECT *\n" + "WHERE {\n" > + " <http://ko.dbpedia.org/resource/문절망둑> owl:sameAs > ?x .\n" + "}"; > Query query = QueryFactory.create(allSameAsQuery); > QueryEngineHTTP httpQuery = new > QueryEngineHTTP(dbpediKoEndpoint, query); > ResultSet results = httpQuery.execSelect(); > while (results.hasNext()) { > QuerySolution solution = results.next(); > String species = solution.getResource("?x").getURI(); > System.out.println(species); > } > > If you input SPARQL query like below on http://ko.dbpedia.org/sparql, you can > get 9 resources. > > PREFIX owl: <http://www.w3.org/2002/07/owl#> > > SELECT * > WHERE > { <http://ko.dbpedia.org/resource/문절망둑> owl:sameAs ?x } > > This query is the same as SPARQL query in my test code. > Thank you. > > Sincerely yours, > Dr. Myungjin Lee > > > -----Original Message----- > From: Miguel Bento Alves [mailto:[email protected]] > Sent: Thursday, November 06, 2014 5:24 PM > To: [email protected] > Subject: Re: Problem SPARQL query encoding > > Hi Myunjin, > > what you did is not enough. You need to create a QueryExecution and create a > ResultSet to have a cursor pointing to the results. > See the example below. > > Miguel > > > String service = "http://dbpedia.org/sparql";; > String query = "select distinct ?Concept where {[] a ?Concept} LIMIT > 100"; > QueryExecution qe > = QueryExecutionFactory.sparqlService(service, query); > > ResultSet rs = qe.execSelect(); > > while(rs.hasNext()) { > QuerySolution qs = rs.next(); > System.out.println("Concept -> "+qs.get("Concept").toString()); > } > >> On 06 Nov 2014, at 07:13, 이명진 <[email protected]> wrote: >> >> Hello. My name is Myunjin Lee. >> >> I am testing simple SPARQL query from Korean DBpedia SPARQL >> endpoint(http://ko.dbpedia.org/sparql) using Jena. >> >> For that, I implemented simple test code, but I had URI encoding >> problem of SPARQL query that has Korean character. >> >> >> >> My simple query is: >> >> >> >> String allSameAsQuery = "" >> >> + "PREFIX owl: <http://www.w3.org/2002/07/owl#>\n" >> >> + "SELECT *\n" + "WHERE {\n" >> >> + " <http://ko.dbpedia.org/resource/문절망둑> >> owl:sameAs ?x .\n" + "}"; >> >> >> >> And then, to process query, I construct Query object. >> >> >> >> Query query = QueryFactory.create(allSameAsQuery); >> >> System.out.println(query.toString()); >> >> >> >> Problem is that the query string is encoded when I make a Query object. >> Print out result is: >> >> >> >> PREFIX owl: <http://www.w3.org/2002/07/owl#> >> >> >> >> SELECT * >> >> WHERE >> >> { >> <http://ko.dbpedia.org/resource/%EB%AC%B8%EC%A0%88%EB%A7%9D%EB%91%91> >> owl:sameAs ?x } >> >> >> >> So that, I cannot get any owl:sameAs resource. >> >> >> >> How can I figure out the encoding problem? Or is there any method for >> my problem? >> >> Thank for your help. >> >> >> >> Sincerely yours, >> >> Dr. Myungjin Lee >> > >
