OWL via Sesame SPARQLRepository

[fal...@gmail.com]

Hi,

I'm using Stardog Community Edition 2.1.2, Sesame 2.7.11 and ran into following problem:

If I try to add an owl file (in xml/rdf format) I get an HTTP status code 415 as answer, but if I upload the very same file via the WebGUI -> Data -> Add no error occurs.

I've used mitmproxy in reverse proxy mode to get the HTTP status code, but I assume using the proxy doesn't add additional problems, because the exception stays the same whether I use the proxy.

Can you give me some hints on what I'm doing wrong?!

Thanks and kind regards,

Alexander Falb

------------------------------------

This is the Java code:

SPARQLRepository repository = new SPARQLRepository("http://localhost:8080/benchmark");
repository.setUsernameAndPassword("admin", "admin");
repository.initialize();

RepositoryConnection repositoryConnection = repository.getConnection();
repositoryConnection.begin();
repositoryConnection.add(new File("eplan_empty.owl"), "", RDFFormat.RDFXML);
repositoryConnection.commit();

repository.shutDown();

The exception I get - where line 19 is the "repositoryConnection.commit()"

[main] WARN  org.openrdf.http.client.HTTPClient:1011 - Server reports problem: 

Exception in thread "main" org.openrdf.repository.RepositoryException: error executing transaction

at org.openrdf.repository.sparql.SPARQLConnection.commit(SPARQLConnection.java:300)

at at.ac.tuwien.otpb.AnotherTestMain.main(AnotherTestMain.java:19)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:606)

at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

Caused by: org.openrdf.query.UpdateExecutionException: 

at org.openrdf.repository.sparql.query.SPARQLUpdate.execute(SPARQLUpdate.java:78)

at org.openrdf.repository.sparql.SPARQLConnection.commit(SPARQLConnection.java:297)

... 6 more

Caused by: org.openrdf.repository.RepositoryException: 

at org.openrdf.http.client.HTTPClient.handleHTTPError(HTTPClient.java:953)

at org.openrdf.http.client.HTTPClient.sendUpdate(HTTPClient.java:390)

at org.openrdf.repository.sparql.query.SPARQLUpdate.execute(SPARQLUpdate.java:61)

... 7 more

And the owl file:

<?xml version="1.0"?>
<rdf:RDF
    xmlns="http://www.owl-ontologies.com/Ontology1370788248.owl#"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:protege="http://protege.stanford.edu/plugins/owl/protege#"
    xmlns:xsp="http://www.owl-ontologies.com/2005/08/07/xsp.owl#"
    xmlns:owl="http://www.w3.org/2002/07/owl#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
    xmlns:swrl="http://www.w3.org/2003/11/swrl#"
    xmlns:swrlb="http://www.w3.org/2003/11/swrlb#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
  xml:base="http://www.owl-ontologies.com/Ontology1370788248.owl">
  <owl:Ontology rdf:about=""/>
  <owl:Class rdf:ID="EPLAN_Signal"/>
  <owl:DatatypeProperty rdf:ID="signalNumber">
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <rdfs:domain rdf:resource="#EPLAN_Signal"/>
  </owl:DatatypeProperty>
  <owl:DatatypeProperty rdf:ID="plcAddress">
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <rdfs:domain rdf:resource="#EPLAN_Signal"/>
  </owl:DatatypeProperty>
  <owl:DatatypeProperty rdf:ID="dataType">
    <rdfs:domain rdf:resource="#EPLAN_Signal"/>
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
  </owl:DatatypeProperty>
  <owl:DatatypeProperty rdf:ID="functionText">
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <rdfs:domain rdf:resource="#EPLAN_Signal"/>
  </owl:DatatypeProperty>
  <owl:DatatypeProperty rdf:ID="symbolicAddress">
    <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#string"/>
    <rdfs:domain rdf:resource="#EPLAN_Signal"/>
  </owl:DatatypeProperty>
</rdf:RDF>

<!-- Created with Protege (with OWL Plugin 3.4.8, Build 629)  http://protege.stanford.edu -->

[Evren Sirin]

SPARQLRepository uses SPARQL Update queries to commit changes so it
should use the SPARQL query endpoint:
"http://localhost:8080/benchmark/query". The URL
"http://localhost:8080/benchmark" would be used for SPARQL graph store
protocol [1] which is different.

Best,
Evren

[1] http://www.w3.org/TR/sparql11-http-rdf-update/

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[fal...@gmail.com]

Thanks for pointing me in the right direction - it's working now!

Kind regards,

Alex