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https://issues.apache.org/jira/browse/JENA-1952?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17186030#comment-17186030
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Adrika Mukherjee commented on JENA-1952:
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For the following data.ttl file:
@prefix ex: <http://example.com/> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
<< ex:book dct:creator ex:alice >> dct:rank 4 .
<< ex:B1 dct:name ex:paul >> dct:rank 1 .
<< ex:B2 dct:name ex:john >> dct:rank 4 .
<< ex:B2 dct:email ex:johnacdedu >> dct:rank 3 .
<< ex:B3 dct:name ex:George >> dct:rank 2 .
<< ex:B3 dct:webPage ex:wwwgeorgeedu >> dct:rank 1 .
<< ex:B4 dct:name ex:ringo >> dct:rank 3 .
<< ex:B4 dct:email ex:ringoacdedu >> dct:rank 2 .
<< ex:B4 dct:webPage ex:wwwstarredu >> dct:rank 4 .
I am using the following piece of code:
String prefixes = "PREFIX ex: <http://example.com/> "String prefixes = "PREFIX
ex: <http://example.com/> " + "PREFIX dct: <http://purl.org/dc/terms/> " +
"PREFIX foaf: <http://xmlns.com/foaf/0.1/> ";
String queryString = prefixes + "SELECT ?o WHERE \{<<ex:book dct:creator ?o>>
dct:rank 4}";
ParserARQ parser = new ParserARQ();
Query query = parser.parse(new Query(), queryString);
String filename1 = "data.ttl";
Graph g = ModelFactory.createDefaultModel().getGraph();
StreamRDF dest = StreamRDFLib.graph(g);
RDFParser.create()
.source( "file://" + filename1 )
.checking(false)
.parse(dest);
Model m = ModelFactory.createModelForGraph(g);
ResultSet rs = QueryExecutionFactory.create(query, m).execSelect();
ResultSetFormatter.out(System.out, rs);
> Jena support for SPARQL*
> ------------------------
>
> Key: JENA-1952
> URL: https://issues.apache.org/jira/browse/JENA-1952
> Project: Apache Jena
> Issue Type: Bug
> Components: ARQ
> Affects Versions: Jena 3.16.0
> Reporter: Adrika Mukherjee
> Priority: Major
>
> SPARQL * does not able to return variables on embedded triples. For example :
> "SELECT ?o ?o1 WHERE \{<<?s ?p ?o>> dct:rank ?o1}"; this query does not work.
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