Same Sparql with different result using different programs

问题

I'm using TopBraid as IDE and Jena in Java. For the same SPARQL query and same file, I'm getting two different result sets. The ontology can be found here, https://dl.dropboxusercontent.com/u/108022472/ontology.owl

The SPARQL is:

select ?individual ?type ?label where {
  ?individual rdf:type ?type .
  ?individual rdfs:label ?label
  filter (?type in (wo:Kingdom))
}

My Java Code:

public class ExeSparql {
    static String prefix = "PREFIX owl: <http://www.w3.org/2002/07/owl#> " +
            "PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> " +
            "PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> " +
            "PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> " +
            "PREFIX dbpedia-owl: <http://dbpedia.org/ontology/> " +
            "PREFIX : <http://dbpedia.org/resource/> " +
            "PREFIX dbpedia2: <http://dbpedia.org/property/> " +
            "PREFIX wo:<http://purl.org/ontology/wo/>" +
            "PREFIX dbpedia: <http://dbpedia.org/> ";

    public static ResultSet execute(String queryString){
        queryString = prefix + queryString;
        Model model = null;
        try {
            InputStream in = new FileInputStream(new File("/home/noor/TBCMEWorkspace/recreate/index.rdf"));
            // Create an empty in-memory model and populate it from the graph
            model = ModelFactory.createOntologyModel();
            model.read(in,null); // null base URI, since model URIs are absolute
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        Query query = QueryFactory.create(queryString);
        // Execute the query and obtain results
        QueryExecution qe = QueryExecutionFactory.create(query, model);
        ResultSet results = qe.execSelect();
        ResultSetFormatter.out(System.out, results, query);
        //qe = QueryExecutionFactory.create(query, model);
        //results = qe.execSelect();
        return results;
    }
}

Is there any problem with the Jena code? Using topbraid, the results is fine, while with Jena, the result is wrong.

The result should have been:

But with Jena, its returning a set of results with incorrect types

回答1:

I've tried this query with the data that you provided (I had to add the prefixes):

prefix wo: <http://purl.org/ontology/wo/>
prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

select ?individual ?type ?label where {
  ?individual rdf:type ?type .
  ?individual rdfs:label ?label
  filter (?type in (wo:Kingdom))
}

I ran the query using Jena's command line arq with the following results:

$ arq --query query.sparql --data ontology.owl 
-------------------------------------------------------------------
| individual                            | type       | label      |
===================================================================
| <file:/nature/life/Animal#kingdom>    | wo:Kingdom | "Animals"  |
| <file:/nature/kingdom/Animal#kingdom> | wo:Kingdom | "animalia" |
-------------------------------------------------------------------

The version of Jena (2.10.0) and ARQ (2.10.0) are as follows:

$ arq --version
Jena:       VERSION: 2.10.0
Jena:       BUILD_DATE: 2013-02-20T12:04:26+0000
ARQ:        VERSION: 2.10.0
ARQ:        BUILD_DATE: 2013-02-20T12:04:26+0000

来源：https://stackoverflow.com/questions/16990478/same-sparql-with-different-result-using-different-programs

标签

java

rdf

sparql

jena