http://git-wip-us.apache.org/repos/asf/incubator-rya/blob/81b99327/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/QueryJoinSelectOptimizerTest.java
----------------------------------------------------------------------
diff --git 
a/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/QueryJoinSelectOptimizerTest.java
 
b/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/QueryJoinSelectOptimizerTest.java
index 63c5d13..5be8e7e 100644
--- 
a/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/QueryJoinSelectOptimizerTest.java
+++ 
b/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/QueryJoinSelectOptimizerTest.java
@@ -19,23 +19,12 @@ package org.apache.rya.rdftriplestore.evaluation;
  * under the License.
  */
 
-
-
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
 
-import org.apache.rya.accumulo.AccumuloRdfConfiguration;
-import org.apache.rya.api.RdfCloudTripleStoreConfiguration;
-import org.apache.rya.api.layout.TablePrefixLayoutStrategy;
-import org.apache.rya.api.persist.RdfEvalStatsDAO;
-import org.apache.rya.joinselect.AccumuloSelectivityEvalDAO;
-import org.apache.rya.prospector.service.ProspectorServiceEvalStatsDAO;
-import org.apache.rya.rdftriplestore.evaluation.QueryJoinSelectOptimizer;
-import 
org.apache.rya.rdftriplestore.evaluation.RdfCloudTripleStoreSelectivityEvaluationStatistics;
-
 import org.apache.accumulo.core.client.AccumuloException;
 import org.apache.accumulo.core.client.AccumuloSecurityException;
 import org.apache.accumulo.core.client.BatchWriter;
@@ -53,14 +42,20 @@ import org.apache.accumulo.core.data.Range;
 import org.apache.accumulo.core.data.Value;
 import org.apache.accumulo.core.security.Authorizations;
 import org.apache.hadoop.io.Text;
+import org.apache.rya.accumulo.AccumuloRdfConfiguration;
+import org.apache.rya.api.RdfCloudTripleStoreConfiguration;
+import org.apache.rya.api.layout.TablePrefixLayoutStrategy;
+import org.apache.rya.api.persist.RdfEvalStatsDAO;
+import org.apache.rya.joinselect.AccumuloSelectivityEvalDAO;
+import org.apache.rya.prospector.service.ProspectorServiceEvalStatsDAO;
+import org.eclipse.rdf4j.query.MalformedQueryException;
+import org.eclipse.rdf4j.query.algebra.TupleExpr;
+import org.eclipse.rdf4j.query.algebra.evaluation.impl.FilterOptimizer;
+import org.eclipse.rdf4j.query.parser.ParsedQuery;
+import org.eclipse.rdf4j.query.parser.sparql.SPARQLParser;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
-import org.openrdf.query.MalformedQueryException;
-import org.openrdf.query.algebra.TupleExpr;
-import org.openrdf.query.algebra.evaluation.impl.FilterOptimizer;
-import org.openrdf.query.parser.ParsedQuery;
-import org.openrdf.query.parser.sparql.SPARQLParser;
 
 public class QueryJoinSelectOptimizerTest {
 
@@ -950,7 +945,7 @@ public class QueryJoinSelectOptimizerTest {
     }
 
     TupleExpr te = getTupleExpr(q6);
-    TupleExpr te2 = (TupleExpr) te.clone();
+    TupleExpr te2 = te.clone();
     System.out.println("Bindings are " + te.getBindingNames());
     RdfCloudTripleStoreSelectivityEvaluationStatistics ars = new 
RdfCloudTripleStoreSelectivityEvaluationStatistics(arc, res, accc);
     QueryJoinSelectOptimizer qjs = new QueryJoinSelectOptimizer(ars, accc);

http://git-wip-us.apache.org/repos/asf/incubator-rya/blob/81b99327/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/RdfCloudTripleStoreSelectivityEvaluationStatisticsTest.java
----------------------------------------------------------------------
diff --git 
a/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/RdfCloudTripleStoreSelectivityEvaluationStatisticsTest.java
 
b/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/RdfCloudTripleStoreSelectivityEvaluationStatisticsTest.java
index bac1b11..77598e7 100644
--- 
a/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/RdfCloudTripleStoreSelectivityEvaluationStatisticsTest.java
+++ 
b/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/RdfCloudTripleStoreSelectivityEvaluationStatisticsTest.java
@@ -19,45 +19,37 @@ package org.apache.rya.rdftriplestore.evaluation;
  * under the License.
  */
 
-
-
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
-import java.util.Map;
 import java.util.concurrent.TimeUnit;
 
-import org.apache.rya.accumulo.AccumuloRdfConfiguration;
-import org.apache.rya.api.RdfCloudTripleStoreConfiguration;
-import org.apache.rya.api.layout.TablePrefixLayoutStrategy;
-import org.apache.rya.api.persist.RdfEvalStatsDAO;
-import org.apache.rya.joinselect.AccumuloSelectivityEvalDAO;
-import org.apache.rya.prospector.service.ProspectorServiceEvalStatsDAO;
-
 import org.apache.accumulo.core.client.AccumuloException;
 import org.apache.accumulo.core.client.AccumuloSecurityException;
 import org.apache.accumulo.core.client.BatchWriter;
 import org.apache.accumulo.core.client.BatchWriterConfig;
 import org.apache.accumulo.core.client.Connector;
 import org.apache.accumulo.core.client.Instance;
-import org.apache.accumulo.core.client.Scanner;
 import org.apache.accumulo.core.client.TableExistsException;
 import org.apache.accumulo.core.client.TableNotFoundException;
 import org.apache.accumulo.core.client.mock.MockInstance;
 import org.apache.accumulo.core.client.security.tokens.PasswordToken;
-import org.apache.accumulo.core.data.Key;
 import org.apache.accumulo.core.data.Mutation;
-import org.apache.accumulo.core.data.Range;
 import org.apache.accumulo.core.data.Value;
-import org.apache.accumulo.core.security.Authorizations;
 import org.apache.hadoop.io.Text;
+import org.apache.rya.accumulo.AccumuloRdfConfiguration;
+import org.apache.rya.api.RdfCloudTripleStoreConfiguration;
+import org.apache.rya.api.layout.TablePrefixLayoutStrategy;
+import org.apache.rya.api.persist.RdfEvalStatsDAO;
+import org.apache.rya.joinselect.AccumuloSelectivityEvalDAO;
+import org.apache.rya.prospector.service.ProspectorServiceEvalStatsDAO;
+import org.eclipse.rdf4j.query.MalformedQueryException;
+import org.eclipse.rdf4j.query.algebra.TupleExpr;
+import org.eclipse.rdf4j.query.parser.ParsedQuery;
+import org.eclipse.rdf4j.query.parser.sparql.SPARQLParser;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
-import org.openrdf.query.MalformedQueryException;
-import org.openrdf.query.algebra.TupleExpr;
-import org.openrdf.query.parser.ParsedQuery;
-import org.openrdf.query.parser.sparql.SPARQLParser;
 
 public class RdfCloudTripleStoreSelectivityEvaluationStatisticsTest {
 

http://git-wip-us.apache.org/repos/asf/incubator-rya/blob/81b99327/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/StatementPatternEvalTest.java
----------------------------------------------------------------------
diff --git 
a/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/StatementPatternEvalTest.java
 
b/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/StatementPatternEvalTest.java
index c1e7d10..f40b4e9 100644
--- 
a/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/StatementPatternEvalTest.java
+++ 
b/sail/src/test/java/org/apache/rya/rdftriplestore/evaluation/StatementPatternEvalTest.java
@@ -37,23 +37,24 @@ import org.apache.rya.api.domain.RyaURI;
 import org.apache.rya.api.domain.StatementMetadata;
 import org.apache.rya.api.persist.RyaDAOException;
 import 
org.apache.rya.rdftriplestore.RdfCloudTripleStoreConnection.StoreTripleSource;
+import org.eclipse.rdf4j.common.iteration.CloseableIteration;
+import org.eclipse.rdf4j.model.ValueFactory;
+import org.eclipse.rdf4j.model.impl.SimpleValueFactory;
+import org.eclipse.rdf4j.query.BindingSet;
+import org.eclipse.rdf4j.query.MalformedQueryException;
+import org.eclipse.rdf4j.query.QueryEvaluationException;
+import org.eclipse.rdf4j.query.algebra.StatementPattern;
+import org.eclipse.rdf4j.query.algebra.evaluation.QueryBindingSet;
+import org.eclipse.rdf4j.query.algebra.helpers.StatementPatternCollector;
+import org.eclipse.rdf4j.query.parser.ParsedQuery;
+import org.eclipse.rdf4j.query.parser.sparql.SPARQLParser;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
-import org.openrdf.model.impl.URIImpl;
-import org.openrdf.query.BindingSet;
-import org.openrdf.query.MalformedQueryException;
-import org.openrdf.query.QueryEvaluationException;
-import org.openrdf.query.algebra.StatementPattern;
-import org.openrdf.query.algebra.evaluation.QueryBindingSet;
-import org.openrdf.query.algebra.helpers.StatementPatternCollector;
-import org.openrdf.query.parser.ParsedQuery;
-import org.openrdf.query.parser.sparql.SPARQLParser;
-
-import info.aduna.iteration.CloseableIteration;
 
 public class StatementPatternEvalTest {
+    private static final ValueFactory VF = SimpleValueFactory.getInstance();
 
     private AccumuloRyaDAO dao;
     private AccumuloRdfConfiguration conf;
@@ -109,16 +110,16 @@ public class StatementPatternEvalTest {
         Assert.assertEquals(3, bsList.size());
         
         QueryBindingSet expected1 = new QueryBindingSet();
-        expected1.addBinding("x", new URIImpl("uri:Joe"));
-        expected1.addBinding("c", new URIImpl("uri:context1"));
+        expected1.addBinding("x", VF.createIRI("uri:Joe"));
+        expected1.addBinding("c", VF.createIRI("uri:context1"));
 
         QueryBindingSet expected2 = new QueryBindingSet();
-        expected2.addBinding("x", new URIImpl("uri:Doug"));
-        expected2.addBinding("c", new URIImpl("uri:context2"));
+        expected2.addBinding("x", VF.createIRI("uri:Doug"));
+        expected2.addBinding("c", VF.createIRI("uri:context2"));
         
         QueryBindingSet expected3 = new QueryBindingSet();
-        expected3.addBinding("x", new URIImpl("uri:Eric"));
-        expected3.addBinding("c", new URIImpl("uri:context3"));
+        expected3.addBinding("x", VF.createIRI("uri:Eric"));
+        expected3.addBinding("c", VF.createIRI("uri:context3"));
         
         Set<BindingSet> expected = new HashSet<>(Arrays.asList(expected1, 
expected2, expected3));
         Set<BindingSet> actual = new HashSet<>(bsList);
@@ -149,10 +150,10 @@ public class StatementPatternEvalTest {
         dao.add(statement3);
 
         QueryBindingSet bsConstraint1 = new QueryBindingSet();
-        bsConstraint1.addBinding("c", new URIImpl("uri:context2"));
+        bsConstraint1.addBinding("c", VF.createIRI("uri:context2"));
         
         QueryBindingSet bsConstraint2 = new QueryBindingSet();
-        bsConstraint2.addBinding("c", new URIImpl("uri:context1"));
+        bsConstraint2.addBinding("c", VF.createIRI("uri:context1"));
 
         
         CloseableIteration<BindingSet, QueryEvaluationException> iteration = 
eval.evaluate(spList.get(0), Arrays.asList(bsConstraint1, bsConstraint2));
@@ -165,12 +166,12 @@ public class StatementPatternEvalTest {
         Assert.assertEquals(2, bsList.size());
         
         QueryBindingSet expected1 = new QueryBindingSet();
-        expected1.addBinding("x", new URIImpl("uri:Joe"));
-        expected1.addBinding("c", new URIImpl("uri:context1"));
+        expected1.addBinding("x", VF.createIRI("uri:Joe"));
+        expected1.addBinding("c", VF.createIRI("uri:context1"));
 
         QueryBindingSet expected2 = new QueryBindingSet();
-        expected2.addBinding("x", new URIImpl("uri:Doug"));
-        expected2.addBinding("c", new URIImpl("uri:context2"));
+        expected2.addBinding("x", VF.createIRI("uri:Doug"));
+        expected2.addBinding("c", VF.createIRI("uri:context2"));
         
         Set<BindingSet> expected = new HashSet<>(Arrays.asList(expected1, 
expected2));
         Set<BindingSet> actual = new HashSet<>(bsList);
@@ -203,10 +204,10 @@ public class StatementPatternEvalTest {
         dao.add(statement3);
 
         QueryBindingSet bsConstraint1 = new QueryBindingSet();
-        bsConstraint1.addBinding("c", new URIImpl("uri:context1"));
+        bsConstraint1.addBinding("c", VF.createIRI("uri:context1"));
         
         QueryBindingSet bsConstraint2 = new QueryBindingSet();
-        bsConstraint2.addBinding("c", new URIImpl("uri:context1"));
+        bsConstraint2.addBinding("c", VF.createIRI("uri:context1"));
 
         
         CloseableIteration<BindingSet, QueryEvaluationException> iteration = 
eval.evaluate(spList.get(0), Arrays.asList(bsConstraint1, bsConstraint2));
@@ -219,8 +220,8 @@ public class StatementPatternEvalTest {
         Assert.assertEquals(1, bsList.size());
         
         QueryBindingSet expected = new QueryBindingSet();
-        expected.addBinding("x", new URIImpl("uri:Joe"));
-        expected.addBinding("c", new URIImpl("uri:context1"));
+        expected.addBinding("x", VF.createIRI("uri:Joe"));
+        expected.addBinding("c", VF.createIRI("uri:context1"));
         
         Assert.assertEquals(expected, bsList.get(0));
 
@@ -260,7 +261,7 @@ public class StatementPatternEvalTest {
         Assert.assertEquals(1, bsList.size());
        
         QueryBindingSet expected = new QueryBindingSet();
-        expected.addBinding("x", new URIImpl("uri:Joe"));
+        expected.addBinding("x", VF.createIRI("uri:Joe"));
         
         Assert.assertEquals(expected, bsList.get(0));
         
@@ -289,7 +290,7 @@ public class StatementPatternEvalTest {
         dao.add(statement3);
 
         QueryBindingSet bsConstraint1 = new QueryBindingSet();
-        bsConstraint1.addBinding("x", new URIImpl("uri:Doug"));
+        bsConstraint1.addBinding("x", VF.createIRI("uri:Doug"));
         
         CloseableIteration<BindingSet, QueryEvaluationException> iteration = 
eval.evaluate(spList.get(0), Arrays.asList(bsConstraint1));
 
@@ -301,7 +302,7 @@ public class StatementPatternEvalTest {
         Assert.assertEquals(1, bsList.size());
         
         QueryBindingSet expected = new QueryBindingSet();
-        expected.addBinding("x", new URIImpl("uri:Doug"));
+        expected.addBinding("x", VF.createIRI("uri:Doug"));
 
         Assert.assertEquals(expected, bsList.get(0));
         

http://git-wip-us.apache.org/repos/asf/incubator-rya/blob/81b99327/sail/src/test/java/org/apache/rya/rdftriplestore/inference/AllValuesFromVisitorTest.java
----------------------------------------------------------------------
diff --git 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/AllValuesFromVisitorTest.java
 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/AllValuesFromVisitorTest.java
index d239577..9c08468 100644
--- 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/AllValuesFromVisitorTest.java
+++ 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/AllValuesFromVisitorTest.java
@@ -29,44 +29,44 @@ import java.util.Set;
 import org.apache.rya.accumulo.AccumuloRdfConfiguration;
 import org.apache.rya.api.utils.NullableStatementImpl;
 import org.apache.rya.rdftriplestore.utils.FixedStatementPattern;
+import org.eclipse.rdf4j.model.IRI;
+import org.eclipse.rdf4j.model.Resource;
+import org.eclipse.rdf4j.model.ValueFactory;
+import org.eclipse.rdf4j.model.impl.SimpleValueFactory;
+import org.eclipse.rdf4j.model.vocabulary.OWL;
+import org.eclipse.rdf4j.model.vocabulary.RDF;
+import org.eclipse.rdf4j.query.algebra.Join;
+import org.eclipse.rdf4j.query.algebra.Projection;
+import org.eclipse.rdf4j.query.algebra.ProjectionElem;
+import org.eclipse.rdf4j.query.algebra.ProjectionElemList;
+import org.eclipse.rdf4j.query.algebra.StatementPattern;
+import org.eclipse.rdf4j.query.algebra.TupleExpr;
+import org.eclipse.rdf4j.query.algebra.Union;
+import org.eclipse.rdf4j.query.algebra.Var;
 import org.junit.Assert;
 import org.junit.Test;
-import org.openrdf.model.Resource;
-import org.openrdf.model.URI;
-import org.openrdf.model.ValueFactory;
-import org.openrdf.model.impl.ValueFactoryImpl;
-import org.openrdf.model.vocabulary.OWL;
-import org.openrdf.model.vocabulary.RDF;
-import org.openrdf.query.algebra.Join;
-import org.openrdf.query.algebra.Projection;
-import org.openrdf.query.algebra.ProjectionElem;
-import org.openrdf.query.algebra.ProjectionElemList;
-import org.openrdf.query.algebra.StatementPattern;
-import org.openrdf.query.algebra.TupleExpr;
-import org.openrdf.query.algebra.Union;
-import org.openrdf.query.algebra.Var;
 
 public class AllValuesFromVisitorTest {
     private final AccumuloRdfConfiguration conf = new 
AccumuloRdfConfiguration();
-    private final ValueFactory vf = new ValueFactoryImpl();
+    private static final ValueFactory VF = SimpleValueFactory.getInstance();
 
     // Value types
-    private final URI person = vf.createURI("urn:Person");
-    private final URI dog = vf.createURI("urn:Dog");
+    private final IRI person = VF.createIRI("urn:Person");
+    private final IRI dog = VF.createIRI("urn:Dog");
     // Predicates
-    private final URI parent = vf.createURI("urn:parent");
-    private final URI relative = vf.createURI("urn:relative");
+    private final IRI parent = VF.createIRI("urn:parent");
+    private final IRI relative = VF.createIRI("urn:relative");
     // Restriction types
-    private final URI parentsAreTallPeople = 
vf.createURI("urn:parentsAreTallPeople");
-    private final URI parentsArePeople = vf.createURI("urn:parentsArePeople");
-    private final URI relativesArePeople = 
vf.createURI("urn:relativesArePeople");
-    private final URI parentsAreDogs = vf.createURI("urn:parentsAreDogs");
+    private final IRI parentsAreTallPeople = 
VF.createIRI("urn:parentsAreTallPeople");
+    private final IRI parentsArePeople = VF.createIRI("urn:parentsArePeople");
+    private final IRI relativesArePeople = 
VF.createIRI("urn:relativesArePeople");
+    private final IRI parentsAreDogs = VF.createIRI("urn:parentsAreDogs");
 
     @Test
     public void testRewriteTypePattern() throws Exception {
         // Configure a mock instance engine with an ontology:
         final InferenceEngine inferenceEngine = mock(InferenceEngine.class);
-        Map<Resource, Set<URI>> personAVF = new HashMap<>();
+        Map<Resource, Set<IRI>> personAVF = new HashMap<>();
         personAVF.put(parentsAreTallPeople, new HashSet<>());
         personAVF.put(parentsArePeople, new HashSet<>());
         personAVF.put(relativesArePeople, new HashSet<>());
@@ -74,7 +74,7 @@ public class AllValuesFromVisitorTest {
         personAVF.get(parentsArePeople).add(parent);
         personAVF.get(relativesArePeople).add(relative);
         personAVF.get(relativesArePeople).add(parent);
-        Map<Resource, Set<URI>> dogAVF = new HashMap<>();
+        Map<Resource, Set<IRI>> dogAVF = new HashMap<>();
         dogAVF.put(parentsAreDogs, new HashSet<>());
         dogAVF.get(parentsAreDogs).add(parent);
         
when(inferenceEngine.getAllValuesFromByValueType(person)).thenReturn(personAVF);

http://git-wip-us.apache.org/repos/asf/incubator-rya/blob/81b99327/sail/src/test/java/org/apache/rya/rdftriplestore/inference/DomainRangeVisitorTest.java
----------------------------------------------------------------------
diff --git 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/DomainRangeVisitorTest.java
 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/DomainRangeVisitorTest.java
index 40f9098..0c5542e 100644
--- 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/DomainRangeVisitorTest.java
+++ 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/DomainRangeVisitorTest.java
@@ -27,36 +27,36 @@ import java.util.Stack;
 
 import org.apache.rya.accumulo.AccumuloRdfConfiguration;
 import org.apache.rya.rdftriplestore.utils.FixedStatementPattern;
+import org.eclipse.rdf4j.model.IRI;
+import org.eclipse.rdf4j.model.Resource;
+import org.eclipse.rdf4j.model.Statement;
+import org.eclipse.rdf4j.model.ValueFactory;
+import org.eclipse.rdf4j.model.impl.SimpleValueFactory;
+import org.eclipse.rdf4j.model.vocabulary.RDF;
+import org.eclipse.rdf4j.model.vocabulary.RDFS;
+import org.eclipse.rdf4j.query.algebra.Join;
+import org.eclipse.rdf4j.query.algebra.Projection;
+import org.eclipse.rdf4j.query.algebra.ProjectionElem;
+import org.eclipse.rdf4j.query.algebra.ProjectionElemList;
+import org.eclipse.rdf4j.query.algebra.StatementPattern;
+import org.eclipse.rdf4j.query.algebra.TupleExpr;
+import org.eclipse.rdf4j.query.algebra.Union;
+import org.eclipse.rdf4j.query.algebra.Var;
 import org.junit.Assert;
 import org.junit.Test;
-import org.openrdf.model.Resource;
-import org.openrdf.model.Statement;
-import org.openrdf.model.URI;
-import org.openrdf.model.ValueFactory;
-import org.openrdf.model.impl.ValueFactoryImpl;
-import org.openrdf.model.vocabulary.RDF;
-import org.openrdf.model.vocabulary.RDFS;
-import org.openrdf.query.algebra.Join;
-import org.openrdf.query.algebra.Projection;
-import org.openrdf.query.algebra.ProjectionElem;
-import org.openrdf.query.algebra.ProjectionElemList;
-import org.openrdf.query.algebra.StatementPattern;
-import org.openrdf.query.algebra.TupleExpr;
-import org.openrdf.query.algebra.Union;
-import org.openrdf.query.algebra.Var;
 
 public class DomainRangeVisitorTest {
     private static final AccumuloRdfConfiguration conf = new 
AccumuloRdfConfiguration();
-    private static final ValueFactory vf = new ValueFactoryImpl();
-    private static final URI person = vf.createURI("lubm:Person");
-    private static final URI advisor = vf.createURI("lubm:advisor");
-    private static final URI takesCourse = vf.createURI("lubm:takesCourse");
+    private static final ValueFactory VF = SimpleValueFactory.getInstance();
+    private static final IRI person = VF.createIRI("lubm:Person");
+    private static final IRI advisor = VF.createIRI("lubm:advisor");
+    private static final IRI takesCourse = VF.createIRI("lubm:takesCourse");
 
     @Test
     public void testRewriteTypePattern() throws Exception {
         final InferenceEngine inferenceEngine = mock(InferenceEngine.class);
-        final Set<URI> domainPredicates = new HashSet<>();
-        final Set<URI> rangePredicates = new HashSet<>();
+        final Set<IRI> domainPredicates = new HashSet<>();
+        final Set<IRI> rangePredicates = new HashSet<>();
         domainPredicates.add(advisor);
         domainPredicates.add(takesCourse);
         rangePredicates.add(advisor);

http://git-wip-us.apache.org/repos/asf/incubator-rya/blob/81b99327/sail/src/test/java/org/apache/rya/rdftriplestore/inference/HasSelfVisitorTest.java
----------------------------------------------------------------------
diff --git 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/HasSelfVisitorTest.java
 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/HasSelfVisitorTest.java
index ba6b7da..3ce93c0 100644
--- 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/HasSelfVisitorTest.java
+++ 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/HasSelfVisitorTest.java
@@ -25,34 +25,34 @@ import java.util.HashSet;
 import java.util.Set;
 
 import org.apache.rya.accumulo.AccumuloRdfConfiguration;
+import org.eclipse.rdf4j.model.IRI;
+import org.eclipse.rdf4j.model.Resource;
+import org.eclipse.rdf4j.model.ValueFactory;
+import org.eclipse.rdf4j.model.impl.SimpleValueFactory;
+import org.eclipse.rdf4j.model.vocabulary.RDF;
+import org.eclipse.rdf4j.query.algebra.Extension;
+import org.eclipse.rdf4j.query.algebra.ExtensionElem;
+import org.eclipse.rdf4j.query.algebra.Projection;
+import org.eclipse.rdf4j.query.algebra.ProjectionElem;
+import org.eclipse.rdf4j.query.algebra.ProjectionElemList;
+import org.eclipse.rdf4j.query.algebra.StatementPattern;
+import org.eclipse.rdf4j.query.algebra.Union;
+import org.eclipse.rdf4j.query.algebra.Var;
 import org.junit.Assert;
 import org.junit.Test;
-import org.openrdf.model.Resource;
-import org.openrdf.model.URI;
-import org.openrdf.model.ValueFactory;
-import org.openrdf.model.impl.ValueFactoryImpl;
-import org.openrdf.model.vocabulary.RDF;
-import org.openrdf.query.algebra.Extension;
-import org.openrdf.query.algebra.ExtensionElem;
-import org.openrdf.query.algebra.Projection;
-import org.openrdf.query.algebra.ProjectionElem;
-import org.openrdf.query.algebra.ProjectionElemList;
-import org.openrdf.query.algebra.StatementPattern;
-import org.openrdf.query.algebra.Union;
-import org.openrdf.query.algebra.Var;
 
 public class HasSelfVisitorTest {
     private final AccumuloRdfConfiguration conf = new 
AccumuloRdfConfiguration();
-    private static final ValueFactory VF = new ValueFactoryImpl();
+    private static final ValueFactory VF = SimpleValueFactory.getInstance();
 
-    private static final URI narcissist = VF.createURI("urn:Narcissist");
-    private static final URI love = VF.createURI("urn:love");
-    private static final URI self = VF.createURI("urn:self");
+    private static final IRI narcissist = VF.createIRI("urn:Narcissist");
+    private static final IRI love = VF.createIRI("urn:love");
+    private static final IRI self = VF.createIRI("urn:self");
 
     @Test
     public void testTypePattern() throws Exception {
         final InferenceEngine inferenceEngine = mock(InferenceEngine.class);
-        final Set<URI> narcissistProps = new HashSet<>();
+        final Set<IRI> narcissistProps = new HashSet<>();
         narcissistProps.add(love);
         
when(inferenceEngine.getHasSelfImplyingType(narcissist)).thenReturn(narcissistProps);
         final Var subj = new Var("s");

http://git-wip-us.apache.org/repos/asf/incubator-rya/blob/81b99327/sail/src/test/java/org/apache/rya/rdftriplestore/inference/HasValueVisitorTest.java
----------------------------------------------------------------------
diff --git 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/HasValueVisitorTest.java
 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/HasValueVisitorTest.java
index c5f2a90..483d593 100644
--- 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/HasValueVisitorTest.java
+++ 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/HasValueVisitorTest.java
@@ -23,50 +23,51 @@ import static org.mockito.Mockito.when;
 
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
 import org.apache.rya.accumulo.AccumuloRdfConfiguration;
-import org.apache.rya.rdftriplestore.inference.HasValueVisitor;
-import org.apache.rya.rdftriplestore.inference.InferenceEngine;
+import org.apache.rya.api.utils.NullableStatementImpl;
 import org.apache.rya.rdftriplestore.utils.FixedStatementPattern;
+import org.eclipse.rdf4j.model.IRI;
+import org.eclipse.rdf4j.model.Resource;
+import org.eclipse.rdf4j.model.Statement;
+import org.eclipse.rdf4j.model.Value;
+import org.eclipse.rdf4j.model.ValueFactory;
+import org.eclipse.rdf4j.model.impl.SimpleValueFactory;
+import org.eclipse.rdf4j.model.vocabulary.RDF;
+import org.eclipse.rdf4j.query.algebra.Join;
+import org.eclipse.rdf4j.query.algebra.Projection;
+import org.eclipse.rdf4j.query.algebra.ProjectionElem;
+import org.eclipse.rdf4j.query.algebra.ProjectionElemList;
+import org.eclipse.rdf4j.query.algebra.StatementPattern;
+import org.eclipse.rdf4j.query.algebra.TupleExpr;
+import org.eclipse.rdf4j.query.algebra.Union;
+import org.eclipse.rdf4j.query.algebra.Var;
 import org.junit.Assert;
 import org.junit.Test;
-import org.openrdf.model.Resource;
-import org.openrdf.model.Statement;
-import org.openrdf.model.URI;
-import org.openrdf.model.Value;
-import org.openrdf.model.ValueFactory;
-import org.openrdf.model.impl.ValueFactoryImpl;
-import org.openrdf.model.vocabulary.RDF;
-import org.openrdf.query.algebra.Join;
-import org.openrdf.query.algebra.Projection;
-import org.openrdf.query.algebra.ProjectionElem;
-import org.openrdf.query.algebra.ProjectionElemList;
-import org.openrdf.query.algebra.StatementPattern;
-import org.openrdf.query.algebra.TupleExpr;
-import org.openrdf.query.algebra.Union;
-import org.openrdf.query.algebra.Var;
 
 public class HasValueVisitorTest {
     private final AccumuloRdfConfiguration conf = new 
AccumuloRdfConfiguration();
-    private final ValueFactory vf = new ValueFactoryImpl();
+    private static final ValueFactory VF = SimpleValueFactory.getInstance();
 
-    private final URI chordate = vf.createURI("urn:Chordate");
-    private final URI vertebrate = vf.createURI("urn:Vertebrate");
-    private final URI mammal = vf.createURI("urn:Mammal");
-    private final URI tunicate = vf.createURI("urn:Tunicate");
-    private final URI hasCharacteristic = 
vf.createURI("urn:anatomicalCharacteristic");
-    private final URI notochord = vf.createURI("urn:notochord");
-    private final URI skull = vf.createURI("urn:skull");
-    private final URI belongsTo = vf.createURI("urn:belongsToTaxon");
-    private final URI chordata = vf.createURI("urn:Chordata");
+    private final IRI chordate = VF.createIRI("urn:Chordate");
+    private final IRI vertebrate = VF.createIRI("urn:Vertebrate");
+    private final IRI mammal = VF.createIRI("urn:Mammal");
+    private final IRI tunicate = VF.createIRI("urn:Tunicate");
+    private final IRI hasCharacteristic = 
VF.createIRI("urn:anatomicalCharacteristic");
+    private final IRI notochord = VF.createIRI("urn:notochord");
+    private final IRI skull = VF.createIRI("urn:skull");
+    private final IRI belongsTo = VF.createIRI("urn:belongsToTaxon");
+    private final IRI chordata = VF.createIRI("urn:Chordata");
 
     @Test
     public void testRewriteTypePattern() throws Exception {
         // Configure a mock instance engine with an ontology:
         final InferenceEngine inferenceEngine = mock(InferenceEngine.class);
-        Map<URI, Set<Value>> vertebrateValues = new HashMap<>();
+        Map<IRI, Set<Value>> vertebrateValues = new HashMap<>();
         vertebrateValues.put(hasCharacteristic, new HashSet<>());
         vertebrateValues.put(belongsTo, new HashSet<>());
         vertebrateValues.get(hasCharacteristic).add(notochord);
@@ -133,10 +134,10 @@ public class HasValueVisitorTest {
         Assert.assertNotNull(belongsToFSP);
         // Verify the expected FSPs for the appropriate properties:
         Assert.assertEquals(2, hasCharacteristicFSP.statements.size());
-        
Assert.assertTrue(hasCharacteristicFSP.statements.contains(vf.createStatement(vertebrate,
 hasCharacteristic, skull)));
-        
Assert.assertTrue(hasCharacteristicFSP.statements.contains(vf.createStatement(vertebrate,
 hasCharacteristic, notochord)));
+        
Assert.assertTrue(hasCharacteristicFSP.statements.contains(VF.createStatement(vertebrate,
 hasCharacteristic, skull)));
+        
Assert.assertTrue(hasCharacteristicFSP.statements.contains(VF.createStatement(vertebrate,
 hasCharacteristic, notochord)));
         Assert.assertEquals(1, belongsToFSP.statements.size());
-        
Assert.assertTrue(belongsToFSP.statements.contains(vf.createStatement(vertebrate,
 belongsTo, chordata)));
+        
Assert.assertTrue(belongsToFSP.statements.contains(VF.createStatement(vertebrate,
 belongsTo, chordata)));
     }
 
     @Test
@@ -183,15 +184,24 @@ public class HasValueVisitorTest {
         Assert.assertEquals(fsp.getSubjectVar(), sp.getObjectVar());
         Assert.assertEquals(originalSP.getObjectVar(), fsp.getObjectVar());
         // Verify FSP: should provide (type, value) pairs
-        final Set<Statement> expectedStatements = new HashSet<>();
-        final URI fspPred = (URI) fsp.getPredicateVar().getValue();
-        expectedStatements.add(vf.createStatement(chordate, fspPred, 
notochord));
-        expectedStatements.add(vf.createStatement(tunicate, fspPred, 
notochord));
-        expectedStatements.add(vf.createStatement(vertebrate, fspPred, 
notochord));
-        expectedStatements.add(vf.createStatement(mammal, fspPred, notochord));
-        expectedStatements.add(vf.createStatement(vertebrate, fspPred, skull));
-        expectedStatements.add(vf.createStatement(mammal, fspPred, skull));
-        final Set<Statement> actualStatements = new HashSet<>(fsp.statements);
-        Assert.assertEquals(expectedStatements, actualStatements);
+        final List<Statement> expectedStatements = new LinkedList<>();
+        final IRI fspPred = (IRI) fsp.getPredicateVar().getValue();
+        expectedStatements.add(new NullableStatementImpl(chordate, fspPred, 
notochord));
+        expectedStatements.add(new NullableStatementImpl(tunicate, fspPred, 
notochord));
+        expectedStatements.add(new NullableStatementImpl(vertebrate, fspPred, 
notochord));
+        expectedStatements.add(new NullableStatementImpl(mammal, fspPred, 
notochord));
+        expectedStatements.add(new NullableStatementImpl(vertebrate, fspPred, 
skull));
+        expectedStatements.add(new NullableStatementImpl(mammal, fspPred, 
skull));
+        final List<Statement> actualStatements = new 
LinkedList<>(fsp.statements);
+        Assert.assertTrue(containsAll(expectedStatements, actualStatements));
+
+    }
+    private boolean containsAll(List<Statement> expected, List<Statement> 
actual){
+        for( Statement a : actual){
+            if (!expected.contains(a)){
+                return false;
+            }
+        }
+        return true;
     }
 }

http://git-wip-us.apache.org/repos/asf/incubator-rya/blob/81b99327/sail/src/test/java/org/apache/rya/rdftriplestore/inference/InferenceEngineTest.java
----------------------------------------------------------------------
diff --git 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/InferenceEngineTest.java
 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/InferenceEngineTest.java
index b3eb900..3ef9e96 100644
--- 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/InferenceEngineTest.java
+++ 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/InferenceEngineTest.java
@@ -32,17 +32,17 @@ import org.apache.rya.accumulo.AccumuloRdfConfiguration;
 import org.apache.rya.accumulo.AccumuloRyaDAO;
 import org.apache.rya.rdftriplestore.RdfCloudTripleStore;
 import org.apache.tinkerpop.gremlin.structure.Graph;
+import org.eclipse.rdf4j.model.IRI;
+import org.eclipse.rdf4j.model.Resource;
+import org.eclipse.rdf4j.model.Value;
+import org.eclipse.rdf4j.model.ValueFactory;
+import org.eclipse.rdf4j.model.impl.SimpleValueFactory;
+import org.eclipse.rdf4j.query.QueryLanguage;
+import org.eclipse.rdf4j.repository.sail.SailRepository;
+import org.eclipse.rdf4j.repository.sail.SailRepositoryConnection;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Test;
-import org.openrdf.model.Resource;
-import org.openrdf.model.URI;
-import org.openrdf.model.Value;
-import org.openrdf.model.ValueFactory;
-import org.openrdf.model.impl.ValueFactoryImpl;
-import org.openrdf.query.QueryLanguage;
-import org.openrdf.repository.sail.SailRepository;
-import org.openrdf.repository.sail.SailRepositoryConnection;
 
 import com.google.common.collect.Sets;
 
@@ -51,7 +51,7 @@ import junit.framework.TestCase;
 public class InferenceEngineTest extends TestCase {
     private Connector connector;
     private AccumuloRyaDAO dao;
-    private final ValueFactory vf = new ValueFactoryImpl();
+    private static final ValueFactory VF = SimpleValueFactory.getInstance();
     private AccumuloRdfConfiguration conf;
     private RdfCloudTripleStore store;
     private InferenceEngine inferenceEngine;
@@ -102,19 +102,19 @@ public class InferenceEngineTest extends TestCase {
                 + "}}";
         conn.prepareUpdate(QueryLanguage.SPARQL, insert).execute();
         inferenceEngine.refreshGraph();
-        final URI a = vf.createURI("urn:A");
-        final URI b = vf.createURI("urn:B");
-        final URI c = vf.createURI("urn:C");
-        final URI d = vf.createURI("urn:D");
-        final URI e = vf.createURI("urn:E");
-        final URI f = vf.createURI("urn:F");
-        final URI g = vf.createURI("urn:G");
-        final URI z = vf.createURI("urn:Z");
-        final URI missing = vf.createURI("urn:Missing");
-        final Set<URI> empty = new HashSet<>();
-        final Set<URI> belowLevel2 = new HashSet<>(Arrays.asList(new URI[] { 
a, b }));
-        final Set<URI> belowLevel3 = new HashSet<>(Arrays.asList(new URI[] { 
a, b, c, d, e }));
-        final Set<URI> belowLevel4 = new HashSet<>(Arrays.asList(new URI[] { 
a, b, c, d, e, f, g }));
+        final IRI a = VF.createIRI("urn:A");
+        final IRI b = VF.createIRI("urn:B");
+        final IRI c = VF.createIRI("urn:C");
+        final IRI d = VF.createIRI("urn:D");
+        final IRI e = VF.createIRI("urn:E");
+        final IRI f = VF.createIRI("urn:F");
+        final IRI g = VF.createIRI("urn:G");
+        final IRI z = VF.createIRI("urn:Z");
+        final IRI missing = VF.createIRI("urn:Missing");
+        final Set<IRI> empty = new HashSet<>();
+        final Set<IRI> belowLevel2 = new HashSet<>(Arrays.asList(a, b));
+        final Set<IRI> belowLevel3 = new HashSet<>(Arrays.asList(a, b, c, d, 
e));
+        final Set<IRI> belowLevel4 = new HashSet<>(Arrays.asList(a, b, c, d, 
e, f, g));
         Assert.assertEquals(empty, inferenceEngine.getSubClasses(a));
         Assert.assertEquals(empty, inferenceEngine.getSubClasses(b));
         Assert.assertEquals(empty, inferenceEngine.getSubClasses(z));
@@ -141,20 +141,20 @@ public class InferenceEngineTest extends TestCase {
         conn.prepareUpdate(QueryLanguage.SPARQL, insert).execute();
         inferenceEngine.refreshGraph();
         final Graph graph = inferenceEngine.getSubPropertyOfGraph();
-        final URI p = vf.createURI("urn:p");
-        final URI q = vf.createURI("urn:q");
-        final URI r = vf.createURI("urn:r");
-        final URI s = vf.createURI("urn:s");
-        final URI t = vf.createURI("urn:t");
-        final URI u = vf.createURI("urn:u");
-        final URI v = vf.createURI("urn:v");
-        final URI w = vf.createURI("urn:w");
-        final URI missing = vf.createURI("urn:Missing");
-        final Set<URI> empty = new HashSet<>();
-        final Set<URI> belowQ = new HashSet<>(Arrays.asList(new URI[] { p }));
-        final Set<URI> belowR = new HashSet<>(Arrays.asList(new URI[] { p, r, 
s }));
-        final Set<URI> belowT = new HashSet<>(Arrays.asList(new URI[] { p, q 
}));
-        final Set<URI> belowU = new HashSet<>(Arrays.asList(new URI[] { p, q, 
r, s, t, u, v }));
+        final IRI p = VF.createIRI("urn:p");
+        final IRI q = VF.createIRI("urn:q");
+        final IRI r = VF.createIRI("urn:r");
+        final IRI s = VF.createIRI("urn:s");
+        final IRI t = VF.createIRI("urn:t");
+        final IRI u = VF.createIRI("urn:u");
+        final IRI v = VF.createIRI("urn:v");
+        final IRI w = VF.createIRI("urn:w");
+        final IRI missing = VF.createIRI("urn:Missing");
+        final Set<IRI> empty = new HashSet<>();
+        final Set<IRI> belowQ = new HashSet<>(Arrays.asList(p));
+        final Set<IRI> belowR = new HashSet<>(Arrays.asList(p, r, s));
+        final Set<IRI> belowT = new HashSet<>(Arrays.asList(p, q));
+        final Set<IRI> belowU = new HashSet<>(Arrays.asList(p, q, r, s, t, u, 
v));
         Assert.assertEquals(empty, InferenceEngine.findParents(graph, p));
         Assert.assertEquals(empty, InferenceEngine.findParents(graph, w));
         Assert.assertEquals(empty, InferenceEngine.findParents(graph, 
missing));
@@ -189,29 +189,29 @@ public class InferenceEngineTest extends TestCase {
                 + "}}";
         conn.prepareUpdate(QueryLanguage.SPARQL, insert).execute();
         inferenceEngine.refreshGraph();
-        final Set<URI> hasDomainD1 = 
inferenceEngine.getPropertiesWithDomain(vf.createURI("urn:D1"));
-        final Set<URI> hasDomainD2 = 
inferenceEngine.getPropertiesWithDomain(vf.createURI("urn:D2"));
-        final Set<URI> hasDomainD3 = 
inferenceEngine.getPropertiesWithDomain(vf.createURI("urn:D3"));
-        final Set<URI> hasRangeD1 = 
inferenceEngine.getPropertiesWithRange(vf.createURI("urn:D1"));
-        final Set<URI> hasRangeD2 = 
inferenceEngine.getPropertiesWithRange(vf.createURI("urn:D2"));
-        final Set<URI> hasRangeD3 = 
inferenceEngine.getPropertiesWithRange(vf.createURI("urn:D3"));
-        final Set<URI> hasDomainR1 = 
inferenceEngine.getPropertiesWithDomain(vf.createURI("urn:R1"));
-        final Set<URI> hasDomainR2 = 
inferenceEngine.getPropertiesWithDomain(vf.createURI("urn:R2"));
-        final Set<URI> hasDomainR3 = 
inferenceEngine.getPropertiesWithDomain(vf.createURI("urn:R3"));
-        final Set<URI> hasRangeR1 = 
inferenceEngine.getPropertiesWithRange(vf.createURI("urn:R1"));
-        final Set<URI> hasRangeR2 = 
inferenceEngine.getPropertiesWithRange(vf.createURI("urn:R2"));
-        final Set<URI> hasRangeR3 = 
inferenceEngine.getPropertiesWithRange(vf.createURI("urn:R3"));
-        final Set<URI> empty = new HashSet<>();
-        final Set<URI> expectedForward = new HashSet<>();
-        expectedForward.add(vf.createURI("urn:p2"));
-        expectedForward.add(vf.createURI("urn:p1"));
-        expectedForward.add(vf.createURI("urn:q2"));
-        expectedForward.add(vf.createURI("urn:q1"));
-        final Set<URI> expectedInverse = new HashSet<>();
-        expectedInverse.add(vf.createURI("urn:i1"));
-        expectedInverse.add(vf.createURI("urn:i2"));
-        expectedInverse.add(vf.createURI("urn:j1"));
-        expectedInverse.add(vf.createURI("urn:j2"));
+        final Set<IRI> hasDomainD1 = 
inferenceEngine.getPropertiesWithDomain(VF.createIRI("urn:D1"));
+        final Set<IRI> hasDomainD2 = 
inferenceEngine.getPropertiesWithDomain(VF.createIRI("urn:D2"));
+        final Set<IRI> hasDomainD3 = 
inferenceEngine.getPropertiesWithDomain(VF.createIRI("urn:D3"));
+        final Set<IRI> hasRangeD1 = 
inferenceEngine.getPropertiesWithRange(VF.createIRI("urn:D1"));
+        final Set<IRI> hasRangeD2 = 
inferenceEngine.getPropertiesWithRange(VF.createIRI("urn:D2"));
+        final Set<IRI> hasRangeD3 = 
inferenceEngine.getPropertiesWithRange(VF.createIRI("urn:D3"));
+        final Set<IRI> hasDomainR1 = 
inferenceEngine.getPropertiesWithDomain(VF.createIRI("urn:R1"));
+        final Set<IRI> hasDomainR2 = 
inferenceEngine.getPropertiesWithDomain(VF.createIRI("urn:R2"));
+        final Set<IRI> hasDomainR3 = 
inferenceEngine.getPropertiesWithDomain(VF.createIRI("urn:R3"));
+        final Set<IRI> hasRangeR1 = 
inferenceEngine.getPropertiesWithRange(VF.createIRI("urn:R1"));
+        final Set<IRI> hasRangeR2 = 
inferenceEngine.getPropertiesWithRange(VF.createIRI("urn:R2"));
+        final Set<IRI> hasRangeR3 = 
inferenceEngine.getPropertiesWithRange(VF.createIRI("urn:R3"));
+        final Set<IRI> empty = new HashSet<>();
+        final Set<IRI> expectedForward = new HashSet<>();
+        expectedForward.add(VF.createIRI("urn:p2"));
+        expectedForward.add(VF.createIRI("urn:p1"));
+        expectedForward.add(VF.createIRI("urn:q2"));
+        expectedForward.add(VF.createIRI("urn:q1"));
+        final Set<IRI> expectedInverse = new HashSet<>();
+        expectedInverse.add(VF.createIRI("urn:i1"));
+        expectedInverse.add(VF.createIRI("urn:i2"));
+        expectedInverse.add(VF.createIRI("urn:j1"));
+        expectedInverse.add(VF.createIRI("urn:j2"));
         Assert.assertEquals(empty, hasDomainD1);
         Assert.assertEquals(empty, hasRangeD1);
         Assert.assertEquals(empty, hasDomainR1);
@@ -248,24 +248,24 @@ public class InferenceEngineTest extends TestCase {
                 + "}}";
         conn.prepareUpdate(QueryLanguage.SPARQL, insert).execute();
         inferenceEngine.refreshGraph();
-        final Set<URI> properties = new HashSet<>();
-        properties.add(vf.createURI("urn:headOf"));
-        properties.add(vf.createURI("urn:temporaryHeadOf"));
-        final Map<Resource, Set<URI>> chairDerivations = new HashMap<>();
-        chairDerivations.put(vf.createURI("urn:Department"), properties);
-        chairDerivations.put(vf.createURI("urn:ScienceDepartment"), 
properties);
-        chairDerivations.put(vf.createURI("urn:HumanitiesDepartment"), 
properties);
-        final Map<Resource, Set<URI>> deanDerivations = new HashMap<>();
-        deanDerivations.put(vf.createURI("urn:College"), properties);
-        final Map<Resource, Set<URI>> combinedDerivations = new 
HashMap<>(chairDerivations);
-        combinedDerivations.put(vf.createURI("urn:College"), properties);
+        final Set<IRI> properties = new HashSet<>();
+        properties.add(VF.createIRI("urn:headOf"));
+        properties.add(VF.createIRI("urn:temporaryHeadOf"));
+        final Map<Resource, Set<IRI>> chairDerivations = new HashMap<>();
+        chairDerivations.put(VF.createIRI("urn:Department"), properties);
+        chairDerivations.put(VF.createIRI("urn:ScienceDepartment"), 
properties);
+        chairDerivations.put(VF.createIRI("urn:HumanitiesDepartment"), 
properties);
+        final Map<Resource, Set<IRI>> deanDerivations = new HashMap<>();
+        deanDerivations.put(VF.createIRI("urn:College"), properties);
+        final Map<Resource, Set<IRI>> combinedDerivations = new 
HashMap<>(chairDerivations);
+        combinedDerivations.put(VF.createIRI("urn:College"), properties);
         // Get someValuesFrom restrictions given the direct types
-        Assert.assertEquals(deanDerivations, 
inferenceEngine.getSomeValuesFromByRestrictionType(vf.createURI("urn:Dean")));
-        Assert.assertEquals(chairDerivations, 
inferenceEngine.getSomeValuesFromByRestrictionType(vf.createURI("urn:Chair")));
+        Assert.assertEquals(deanDerivations, 
inferenceEngine.getSomeValuesFromByRestrictionType(VF.createIRI("urn:Dean")));
+        Assert.assertEquals(chairDerivations, 
inferenceEngine.getSomeValuesFromByRestrictionType(VF.createIRI("urn:Chair")));
         // Finds the subtype's restrictions given the supertype
-        Assert.assertEquals(combinedDerivations, 
inferenceEngine.getSomeValuesFromByRestrictionType(vf.createURI("urn:Person")));
+        Assert.assertEquals(combinedDerivations, 
inferenceEngine.getSomeValuesFromByRestrictionType(VF.createIRI("urn:Person")));
         // Finds nothing if given a subtype which is not a restriction
-        Assert.assertEquals(new HashMap<>(), 
inferenceEngine.getSomeValuesFromByRestrictionType(vf.createURI("urn:ScienceDepartmentChair")));
+        Assert.assertEquals(new HashMap<>(), 
inferenceEngine.getSomeValuesFromByRestrictionType(VF.createIRI("urn:ScienceDepartmentChair")));
     }
 
     @Test
@@ -283,20 +283,20 @@ public class InferenceEngineTest extends TestCase {
                 + "}}";
         conn.prepareUpdate(QueryLanguage.SPARQL, insert).execute();
         inferenceEngine.refreshGraph();
-        final Map<Resource, Set<URI>> restrictionsImplyingTerrier = new 
HashMap<>();
-        final Set<URI> properties = new HashSet<>();
-        properties.add(vf.createURI("urn:parent"));
-        properties.add(vf.createURI("urn:relative"));
-        restrictionsImplyingTerrier.put(vf.createURI("urn:Terrier"), 
properties);
-        restrictionsImplyingTerrier.put(vf.createURI("urn:Cairn_Terrier"), 
properties);
-        Assert.assertEquals(restrictionsImplyingTerrier, 
inferenceEngine.getAllValuesFromByValueType(vf.createURI("urn:Terrier")));
-        final Map<Resource, Set<URI>> restrictionsImplyingDog = new 
HashMap<>(restrictionsImplyingTerrier);
-        restrictionsImplyingDog.put(vf.createURI("urn:Dog"), properties);
-        restrictionsImplyingDog.put(vf.createURI("urn:Retriever"), properties);
-        Assert.assertEquals(restrictionsImplyingDog, 
inferenceEngine.getAllValuesFromByValueType(vf.createURI("urn:Dog")));
-        final Map<Resource, Set<URI>> restrictionsImplyingMammal = new 
HashMap<>(restrictionsImplyingDog);
-        restrictionsImplyingMammal.put(vf.createURI("urn:Person"), properties);
-        Assert.assertEquals(restrictionsImplyingMammal, 
inferenceEngine.getAllValuesFromByValueType(vf.createURI("urn:Mammal")));
+        final Map<Resource, Set<IRI>> restrictionsImplyingTerrier = new 
HashMap<>();
+        final Set<IRI> properties = new HashSet<>();
+        properties.add(VF.createIRI("urn:parent"));
+        properties.add(VF.createIRI("urn:relative"));
+        restrictionsImplyingTerrier.put(VF.createIRI("urn:Terrier"), 
properties);
+        restrictionsImplyingTerrier.put(VF.createIRI("urn:Cairn_Terrier"), 
properties);
+        Assert.assertEquals(restrictionsImplyingTerrier, 
inferenceEngine.getAllValuesFromByValueType(VF.createIRI("urn:Terrier")));
+        final Map<Resource, Set<IRI>> restrictionsImplyingDog = new 
HashMap<>(restrictionsImplyingTerrier);
+        restrictionsImplyingDog.put(VF.createIRI("urn:Dog"), properties);
+        restrictionsImplyingDog.put(VF.createIRI("urn:Retriever"), properties);
+        Assert.assertEquals(restrictionsImplyingDog, 
inferenceEngine.getAllValuesFromByValueType(VF.createIRI("urn:Dog")));
+        final Map<Resource, Set<IRI>> restrictionsImplyingMammal = new 
HashMap<>(restrictionsImplyingDog);
+        restrictionsImplyingMammal.put(VF.createIRI("urn:Person"), properties);
+        Assert.assertEquals(restrictionsImplyingMammal, 
inferenceEngine.getAllValuesFromByValueType(VF.createIRI("urn:Mammal")));
     }
 
     @Test
@@ -320,14 +320,14 @@ public class InferenceEngineTest extends TestCase {
         final Map<Resource, Set<Value>> typeToValueImplications = new 
HashMap<>();
         final Set<Value> vertebrateTaxa = new HashSet<>();
         final Set<Value> tunicateTaxa = new HashSet<>();
-        vertebrateTaxa.add(vf.createURI("urn:Vertebrata"));
-        tunicateTaxa.add(vf.createURI("urn:Tunicata"));
+        vertebrateTaxa.add(VF.createIRI("urn:Vertebrata"));
+        tunicateTaxa.add(VF.createIRI("urn:Tunicata"));
         final Set<Value> mammalTaxa = new HashSet<>(vertebrateTaxa);
-        mammalTaxa.add(vf.createURI("urn:Mammalia"));
-        typeToValueImplications.put(vf.createURI("urn:Vertebrate"), 
vertebrateTaxa);
-        typeToValueImplications.put(vf.createURI("urn:Tunicate"), 
tunicateTaxa);
-        typeToValueImplications.put(vf.createURI("urn:Mammal"), mammalTaxa);
-        Assert.assertEquals(typeToValueImplications, 
inferenceEngine.getHasValueByProperty(vf.createURI("urn:taxon")));
+        mammalTaxa.add(VF.createIRI("urn:Mammalia"));
+        typeToValueImplications.put(VF.createIRI("urn:Vertebrate"), 
vertebrateTaxa);
+        typeToValueImplications.put(VF.createIRI("urn:Tunicate"), 
tunicateTaxa);
+        typeToValueImplications.put(VF.createIRI("urn:Mammal"), mammalTaxa);
+        Assert.assertEquals(typeToValueImplications, 
inferenceEngine.getHasValueByProperty(VF.createIRI("urn:taxon")));
     }
 
     @Test
@@ -350,35 +350,35 @@ public class InferenceEngineTest extends TestCase {
                 + "}}";
         conn.prepareUpdate(QueryLanguage.SPARQL, insert).execute();
         inferenceEngine.refreshGraph();
-        final URI legs = vf.createURI("urn:walksUsingLegs");
-        final URI taxon = vf.createURI("urn:taxon");
+        final IRI legs = VF.createIRI("urn:walksUsingLegs");
+        final IRI taxon = VF.createIRI("urn:taxon");
         // Verify direct restrictions:
-        final Map<URI, Set<Value>> valuesImplyingBiped = new HashMap<>();
+        final Map<IRI, Set<Value>> valuesImplyingBiped = new HashMap<>();
         valuesImplyingBiped.put(legs, new HashSet<>());
-        valuesImplyingBiped.get(legs).add(vf.createLiteral("2"));
-        Assert.assertEquals(valuesImplyingBiped, 
inferenceEngine.getHasValueByType(vf.createURI("urn:Biped")));
-        final Map<URI, Set<Value>> valuesImplyingMammal = new HashMap<>();
+        valuesImplyingBiped.get(legs).add(VF.createLiteral("2"));
+        Assert.assertEquals(valuesImplyingBiped, 
inferenceEngine.getHasValueByType(VF.createIRI("urn:Biped")));
+        final Map<IRI, Set<Value>> valuesImplyingMammal = new HashMap<>();
         valuesImplyingMammal.put(taxon, new HashSet<>());
-        valuesImplyingMammal.get(taxon).add(vf.createURI("urn:Mammalia"));
-        Assert.assertEquals(valuesImplyingMammal, 
inferenceEngine.getHasValueByType(vf.createURI("urn:Mammal")));
-        final Map<URI, Set<Value>> valuesImplyingTunicate = new HashMap<>();
+        valuesImplyingMammal.get(taxon).add(VF.createIRI("urn:Mammalia"));
+        Assert.assertEquals(valuesImplyingMammal, 
inferenceEngine.getHasValueByType(VF.createIRI("urn:Mammal")));
+        final Map<IRI, Set<Value>> valuesImplyingTunicate = new HashMap<>();
         valuesImplyingTunicate.put(taxon, new HashSet<>());
-        valuesImplyingTunicate.get(taxon).add(vf.createURI("urn:Tunicata"));
-        Assert.assertEquals(valuesImplyingTunicate, 
inferenceEngine.getHasValueByType(vf.createURI("urn:Tunicate")));
-        final Map<URI, Set<Value>> valuesImplyingPlant = new HashMap<>();
+        valuesImplyingTunicate.get(taxon).add(VF.createIRI("urn:Tunicata"));
+        Assert.assertEquals(valuesImplyingTunicate, 
inferenceEngine.getHasValueByType(VF.createIRI("urn:Tunicate")));
+        final Map<IRI, Set<Value>> valuesImplyingPlant = new HashMap<>();
         valuesImplyingPlant.put(taxon, new HashSet<>());
-        valuesImplyingPlant.get(taxon).add(vf.createURI("urn:Plantae"));
-        Assert.assertEquals(valuesImplyingPlant, 
inferenceEngine.getHasValueByType(vf.createURI("urn:Plant")));
+        valuesImplyingPlant.get(taxon).add(VF.createIRI("urn:Plantae"));
+        Assert.assertEquals(valuesImplyingPlant, 
inferenceEngine.getHasValueByType(VF.createIRI("urn:Plant")));
         // Verify indirect restrictions given a supertype, including multiple 
properties where relevant:
-        final Map<URI, Set<Value>> valuesImplyingVertebrate = new HashMap<>();
+        final Map<IRI, Set<Value>> valuesImplyingVertebrate = new HashMap<>();
         valuesImplyingVertebrate.put(taxon, new 
HashSet<>(valuesImplyingMammal.get(taxon)));
-        
valuesImplyingVertebrate.get(taxon).add(vf.createURI("urn:Vertebrata"));
-        Assert.assertEquals(valuesImplyingVertebrate, 
inferenceEngine.getHasValueByType(vf.createURI("urn:Vertebrate")));
-        final Map<URI, Set<Value>> valuesImplyingAnimal = new HashMap<>();
+        
valuesImplyingVertebrate.get(taxon).add(VF.createIRI("urn:Vertebrata"));
+        Assert.assertEquals(valuesImplyingVertebrate, 
inferenceEngine.getHasValueByType(VF.createIRI("urn:Vertebrate")));
+        final Map<IRI, Set<Value>> valuesImplyingAnimal = new HashMap<>();
         valuesImplyingAnimal.put(legs, valuesImplyingBiped.get(legs));
         valuesImplyingAnimal.put(taxon, new 
HashSet<>(valuesImplyingVertebrate.get(taxon)));
         
valuesImplyingAnimal.get(taxon).addAll(valuesImplyingTunicate.get(taxon));
-        Assert.assertEquals(valuesImplyingAnimal, 
inferenceEngine.getHasValueByType(vf.createURI("urn:Animal")));
+        Assert.assertEquals(valuesImplyingAnimal, 
inferenceEngine.getHasValueByType(VF.createIRI("urn:Animal")));
     }
 
     @Test
@@ -396,15 +396,15 @@ public class InferenceEngineTest extends TestCase {
                 + "}}";
         conn.prepareUpdate(QueryLanguage.SPARQL, ontology).execute();
         inferenceEngine.refreshGraph();
-        final Set<URI> subClassesA = 
inferenceEngine.getSubClasses(vf.createURI("urn:A"));
-        final Set<URI> subClassesB = 
inferenceEngine.getSubClasses(vf.createURI("urn:B"));
-        final Set<URI> expectedA = new HashSet<>();
-        final Set<URI> expectedB = new HashSet<>();
-        expectedB.add(vf.createURI("urn:Y"));
-        expectedB.add(vf.createURI("urn:SubY"));
-        expectedB.add(vf.createURI("urn:Z"));
+        final Set<IRI> subClassesA = 
inferenceEngine.getSubClasses(VF.createIRI("urn:A"));
+        final Set<IRI> subClassesB = 
inferenceEngine.getSubClasses(VF.createIRI("urn:B"));
+        final Set<IRI> expectedA = new HashSet<>();
+        final Set<IRI> expectedB = new HashSet<>();
+        expectedB.add(VF.createIRI("urn:Y"));
+        expectedB.add(VF.createIRI("urn:SubY"));
+        expectedB.add(VF.createIRI("urn:Z"));
         expectedA.addAll(expectedB);
-        expectedA.add(vf.createURI("urn:X"));
+        expectedA.add(VF.createIRI("urn:X"));
         Assert.assertEquals(expectedA, subClassesA);
         Assert.assertEquals(expectedB, subClassesB);
     }
@@ -433,14 +433,14 @@ public class InferenceEngineTest extends TestCase {
         conn.prepareUpdate(QueryLanguage.SPARQL, ontology).execute();
         inferenceEngine.refreshGraph();
 
-        final URI mother = vf.createURI("urn:Mother");
-        final URI father = vf.createURI("urn:Father");
-        final URI woman = vf.createURI("urn:Woman");
-        final URI parent = vf.createURI("urn:Parent");
-        final URI man = vf.createURI("urn:Man");
-        final URI mom = vf.createURI("urn:Mom");
-        final URI immediateFamilyMember = 
vf.createURI("urn:ImmediateFamilyMember");
-        final URI relative = vf.createURI("urn:Relative");
+        final IRI mother = VF.createIRI("urn:Mother");
+        final IRI father = VF.createIRI("urn:Father");
+        final IRI woman = VF.createIRI("urn:Woman");
+        final IRI parent = VF.createIRI("urn:Parent");
+        final IRI man = VF.createIRI("urn:Man");
+        final IRI mom = VF.createIRI("urn:Mom");
+        final IRI immediateFamilyMember = 
VF.createIRI("urn:ImmediateFamilyMember");
+        final IRI relative = VF.createIRI("urn:Relative");
 
         final List<Set<Resource>> intersectionsImplyingMother = 
Arrays.asList(Sets.newHashSet(woman, parent));
         Assert.assertEquals(intersectionsImplyingMother, 
inferenceEngine.getIntersectionsImplying(mother));
@@ -450,7 +450,7 @@ public class InferenceEngineTest extends TestCase {
         // Check that Mother is a subclassOf Parent and Woman and
         // ImmediateFamilyMember and Relative. Also, Mother is a subclassOf
         // Mother and Mom through inferring equivalentClass.
-        final Set<URI> motherSuperClassUris = 
inferenceEngine.getSuperClasses(mother);
+        final Set<IRI> motherSuperClassUris = 
inferenceEngine.getSuperClasses(mother);
         Assert.assertNotNull(motherSuperClassUris);
         Assert.assertEquals(6, motherSuperClassUris.size());
         Assert.assertTrue(motherSuperClassUris.contains(parent));
@@ -460,7 +460,7 @@ public class InferenceEngineTest extends TestCase {
         Assert.assertTrue(motherSuperClassUris.contains(mother));
         Assert.assertTrue(motherSuperClassUris.contains(mom));
         // Check that Father is a subclassOf Parent and Man
-        final Set<URI> fatherSuperClassUris = 
inferenceEngine.getSuperClasses(father);
+        final Set<IRI> fatherSuperClassUris = 
inferenceEngine.getSuperClasses(father);
         Assert.assertNotNull(fatherSuperClassUris);
         Assert.assertEquals(2, fatherSuperClassUris.size());
         Assert.assertTrue(fatherSuperClassUris.contains(parent));
@@ -470,7 +470,7 @@ public class InferenceEngineTest extends TestCase {
         // ImmediateFamilyMember and Relative. The last 2 should be inferred
         // from having the same intersection as Mother. Also, Mom is a
         // subclassOf Mother and Mom through inferring equivalentClass.
-        final Set<URI> momSuperClassUris = 
inferenceEngine.getSuperClasses(mom);
+        final Set<IRI> momSuperClassUris = 
inferenceEngine.getSuperClasses(mom);
         Assert.assertNotNull(momSuperClassUris);
         Assert.assertEquals(6, momSuperClassUris.size());
         Assert.assertTrue(momSuperClassUris.contains(parent));
@@ -525,29 +525,29 @@ public class InferenceEngineTest extends TestCase {
         conn.prepareUpdate(QueryLanguage.SPARQL, ontology).execute();
         inferenceEngine.refreshGraph();
 
-        final URI suits = vf.createURI("urn:Suits");
-        final URI ranks = vf.createURI("urn:Ranks");
-
-        final URI clubs = vf.createURI("urn:Clubs");
-        final URI diamonds = vf.createURI("urn:Diamonds");
-        final URI hearts = vf.createURI("urn:Hearts");
-        final URI spades = vf.createURI("urn:Spades");
-
-        final URI ace = vf.createURI("urn:Ace");
-        final URI two = vf.createURI("urn:2");
-        final URI three = vf.createURI("urn:3");
-        final URI four = vf.createURI("urn:4");
-        final URI five = vf.createURI("urn:5");
-        final URI six = vf.createURI("urn:6");
-        final URI seven = vf.createURI("urn:7");
-        final URI eight = vf.createURI("urn:8");
-        final URI nine = vf.createURI("urn:9");
-        final URI ten = vf.createURI("urn:10");
-        final URI jack = vf.createURI("urn:Jack");
-        final URI queen = vf.createURI("urn:Queen");
-        final URI king = vf.createURI("urn:King");
-
-        final URI joker = vf.createURI("urn:Joker");
+        final IRI suits = VF.createIRI("urn:Suits");
+        final IRI ranks = VF.createIRI("urn:Ranks");
+
+        final IRI clubs = VF.createIRI("urn:Clubs");
+        final IRI diamonds = VF.createIRI("urn:Diamonds");
+        final IRI hearts = VF.createIRI("urn:Hearts");
+        final IRI spades = VF.createIRI("urn:Spades");
+
+        final IRI ace = VF.createIRI("urn:Ace");
+        final IRI two = VF.createIRI("urn:2");
+        final IRI three = VF.createIRI("urn:3");
+        final IRI four = VF.createIRI("urn:4");
+        final IRI five = VF.createIRI("urn:5");
+        final IRI six = VF.createIRI("urn:6");
+        final IRI seven = VF.createIRI("urn:7");
+        final IRI eight = VF.createIRI("urn:8");
+        final IRI nine = VF.createIRI("urn:9");
+        final IRI ten = VF.createIRI("urn:10");
+        final IRI jack = VF.createIRI("urn:Jack");
+        final IRI queen = VF.createIRI("urn:Queen");
+        final IRI king = VF.createIRI("urn:King");
+
+        final IRI joker = VF.createIRI("urn:Joker");
 
         final boolean isJokerEnumeratedType = 
inferenceEngine.isEnumeratedType(joker);
         Assert.assertFalse(isJokerEnumeratedType);
@@ -572,12 +572,12 @@ public class InferenceEngineTest extends TestCase {
         conn.prepareUpdate(QueryLanguage.SPARQL, ontology).execute();
         inferenceEngine.refreshGraph();
         final Set<Resource> expectedTypes = new HashSet<>();
-        expectedTypes.add(vf.createURI("urn:Narcissist"));
-        Assert.assertEquals(expectedTypes, 
inferenceEngine.getHasSelfImplyingProperty(vf.createURI("urn:love")));
+        expectedTypes.add(VF.createIRI("urn:Narcissist"));
+        Assert.assertEquals(expectedTypes, 
inferenceEngine.getHasSelfImplyingProperty(VF.createIRI("urn:love")));
 
-        final Set<URI> expectedProperties = new HashSet<>();
-        expectedProperties.add(vf.createURI("urn:love"));
-        Assert.assertEquals(expectedProperties, 
inferenceEngine.getHasSelfImplyingType(vf.createURI("urn:Narcissist")));
+        final Set<IRI> expectedProperties = new HashSet<>();
+        expectedProperties.add(VF.createIRI("urn:love"));
+        Assert.assertEquals(expectedProperties, 
inferenceEngine.getHasSelfImplyingType(VF.createIRI("urn:Narcissist")));
     }
 
     @Test
@@ -592,12 +592,12 @@ public class InferenceEngineTest extends TestCase {
                 + "}}";
         conn.prepareUpdate(QueryLanguage.SPARQL, ontology).execute();
         inferenceEngine.refreshGraph();
-        final URI comment = vf.createURI("urn:comment"); // none of the three 
supported types
-        final URI older = vf.createURI("urn:olderThan"); // transitive only
-        final URI notYounger = vf.createURI("urn:notYoungerThan"); // 
transitive and reflexive
-        final URI related = vf.createURI("urn:related"); // transitive and 
symmetric
-        final URI knows = vf.createURI("urn:knows"); // reflexive and symmetric
-        final URI sameAge = vf.createURI("urn:sameAgeAs"); // all three
+        final IRI comment = VF.createIRI("urn:comment"); // none of the three 
supported types
+        final IRI older = VF.createIRI("urn:olderThan"); // transitive only
+        final IRI notYounger = VF.createIRI("urn:notYoungerThan"); // 
transitive and reflexive
+        final IRI related = VF.createIRI("urn:related"); // transitive and 
symmetric
+        final IRI knows = VF.createIRI("urn:knows"); // reflexive and symmetric
+        final IRI sameAge = VF.createIRI("urn:sameAgeAs"); // all three
         // symmetry
         Assert.assertFalse(inferenceEngine.isSymmetricProperty(comment));
         Assert.assertFalse(inferenceEngine.isSymmetricProperty(older));

http://git-wip-us.apache.org/repos/asf/incubator-rya/blob/81b99327/sail/src/test/java/org/apache/rya/rdftriplestore/inference/InferenceIT.java
----------------------------------------------------------------------
diff --git 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/InferenceIT.java 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/InferenceIT.java
index 375db4a..b53f5ee 100644
--- 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/InferenceIT.java
+++ 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/InferenceIT.java
@@ -32,23 +32,23 @@ import org.apache.rya.accumulo.AccumuloRdfConfiguration;
 import org.apache.rya.accumulo.AccumuloRyaDAO;
 import org.apache.rya.api.RdfCloudTripleStoreConstants;
 import org.apache.rya.rdftriplestore.RdfCloudTripleStore;
+import org.eclipse.rdf4j.model.IRI;
+import org.eclipse.rdf4j.model.Value;
+import org.eclipse.rdf4j.model.ValueFactory;
+import org.eclipse.rdf4j.model.impl.SimpleValueFactory;
+import org.eclipse.rdf4j.model.vocabulary.FOAF;
+import org.eclipse.rdf4j.model.vocabulary.OWL;
+import org.eclipse.rdf4j.query.BindingSet;
+import org.eclipse.rdf4j.query.QueryLanguage;
+import org.eclipse.rdf4j.query.QueryResultHandlerException;
+import org.eclipse.rdf4j.query.TupleQueryResultHandler;
+import org.eclipse.rdf4j.query.TupleQueryResultHandlerException;
+import org.eclipse.rdf4j.query.impl.ListBindingSet;
+import org.eclipse.rdf4j.repository.sail.SailRepository;
+import org.eclipse.rdf4j.repository.sail.SailRepositoryConnection;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Test;
-import org.openrdf.model.URI;
-import org.openrdf.model.Value;
-import org.openrdf.model.ValueFactory;
-import org.openrdf.model.impl.ValueFactoryImpl;
-import org.openrdf.model.vocabulary.FOAF;
-import org.openrdf.model.vocabulary.OWL;
-import org.openrdf.query.BindingSet;
-import org.openrdf.query.QueryLanguage;
-import org.openrdf.query.QueryResultHandlerException;
-import org.openrdf.query.TupleQueryResultHandler;
-import org.openrdf.query.TupleQueryResultHandlerException;
-import org.openrdf.query.impl.ListBindingSet;
-import org.openrdf.repository.sail.SailRepository;
-import org.openrdf.repository.sail.SailRepositoryConnection;
 
 import junit.framework.TestCase;
 
@@ -57,7 +57,7 @@ public class InferenceIT extends TestCase {
 
     private Connector connector;
     private AccumuloRyaDAO dao;
-    private final ValueFactory vf = new ValueFactoryImpl();
+    private static final ValueFactory VF = SimpleValueFactory.getInstance();
     private AccumuloRdfConfiguration conf;
     private RdfCloudTripleStore store;
     private InferenceEngine inferenceEngine;
@@ -142,9 +142,9 @@ public class InferenceIT extends TestCase {
         conn.prepareUpdate(QueryLanguage.SPARQL, instances).execute();
         conn.prepareTupleQuery(QueryLanguage.SPARQL, 
query).evaluate(resultHandler);
         final Set<Value> expected = new HashSet<>();
-        expected.add(vf.createURI("urn:Alice"));
-        expected.add(vf.createURI("urn:Bob"));
-        expected.add(vf.createURI("urn:Eve"));
+        expected.add(VF.createIRI("urn:Alice"));
+        expected.add(VF.createIRI("urn:Bob"));
+        expected.add(VF.createIRI("urn:Eve"));
         final Set<Value> returned = new HashSet<>();
         for (final BindingSet bs : solutions) {
             returned.add(bs.getBinding("x").getValue());
@@ -185,10 +185,10 @@ public class InferenceIT extends TestCase {
         conn.prepareUpdate(QueryLanguage.SPARQL, instances).execute();
         conn.prepareTupleQuery(QueryLanguage.SPARQL, 
query).evaluate(resultHandler);
         final Set<Value> expected = new HashSet<>();
-        expected.add(vf.createURI("urn:Professor1"));
-        expected.add(vf.createURI("urn:Professor2"));
-        expected.add(vf.createURI("urn:Professor3"));
-        expected.add(vf.createURI("urn:Professor4"));
+        expected.add(VF.createIRI("urn:Professor1"));
+        expected.add(VF.createIRI("urn:Professor2"));
+        expected.add(VF.createIRI("urn:Professor3"));
+        expected.add(VF.createIRI("urn:Professor4"));
         final Set<Value> returned = new HashSet<>();
         for (final BindingSet bs : solutions) {
             returned.add(bs.getBinding("x").getValue());
@@ -244,9 +244,9 @@ public class InferenceIT extends TestCase {
         conn.prepareUpdate(QueryLanguage.SPARQL, instances).execute();
         conn.prepareTupleQuery(QueryLanguage.SPARQL, 
query).evaluate(resultHandler);
         Map<Value, Integer> expected = new HashMap<>();
-        expected.put(vf.createURI("urn:Alice"), 2); // from both courses
-        expected.put(vf.createURI("urn:Bob"), 1); // from course
-        expected.put(vf.createURI("urn:Carol"), 2); // from course and 
explicit type
+        expected.put(VF.createIRI("urn:Alice"), 2); // from both courses
+        expected.put(VF.createIRI("urn:Bob"), 1); // from course
+        expected.put(VF.createIRI("urn:Carol"), 2); // from course and 
explicit type
         Map<Value, Integer> returned = new HashMap<>();
         for (BindingSet bs : solutions) {
             Value v = bs.getBinding("individual").getValue();
@@ -281,15 +281,15 @@ public class InferenceIT extends TestCase {
         for (final BindingSet solution : solutions) {
             answers.add(solution.getBinding("x").getValue());
         }
-        Assert.assertTrue(answers.contains(vf.createURI("urn:Terry")));
-        Assert.assertTrue(answers.contains(vf.createURI("urn:Rommy")));
+        Assert.assertTrue(answers.contains(VF.createIRI("urn:Terry")));
+        Assert.assertTrue(answers.contains(VF.createIRI("urn:Rommy")));
         // If allValuesFrom inference were applied recursively, this triple 
wouldn't be needed:
         conn.prepareUpdate(QueryLanguage.SPARQL, "INSERT DATA { GRAPH 
<http://updated/test> {\n"
                 + "  <urn:Terry> a <urn:Cairn_Terrier> .\n"
                 + "}}").execute();
         conn.prepareTupleQuery(QueryLanguage.SPARQL, "SELECT ?x { ?x a 
<urn:FictionalDog> }").evaluate(resultHandler);
         Assert.assertEquals(1, solutions.size());
-        Assert.assertEquals(vf.createURI("urn:Toto"), 
solutions.get(0).getBinding("x").getValue());
+        Assert.assertEquals(VF.createIRI("urn:Toto"), 
solutions.get(0).getBinding("x").getValue());
     }
 
     @Test
@@ -318,11 +318,11 @@ public class InferenceIT extends TestCase {
         conn.prepareUpdate(QueryLanguage.SPARQL, instances).execute();
         conn.prepareTupleQuery(QueryLanguage.SPARQL, 
query).evaluate(resultHandler);
         final Set<Value> expected = new HashSet<>();
-        expected.add(vf.createURI("urn:Alice"));
-        expected.add(vf.createURI("urn:Bob"));
-        expected.add(vf.createURI("urn:Carol"));
-        expected.add(vf.createURI("urn:Dan"));
-        expected.add(vf.createURI("urn:Lucy"));
+        expected.add(VF.createIRI("urn:Alice"));
+        expected.add(VF.createIRI("urn:Bob"));
+        expected.add(VF.createIRI("urn:Carol"));
+        expected.add(VF.createIRI("urn:Dan"));
+        expected.add(VF.createIRI("urn:Lucy"));
         final Set<Value> returned = new HashSet<>();
         for (final BindingSet bs : solutions) {
             returned.add(bs.getBinding("x").getValue());
@@ -358,12 +358,12 @@ public class InferenceIT extends TestCase {
         final List<String> varNames = new LinkedList<>();
         varNames.add("individual");
         varNames.add("taxon");
-        expected.add(new ListBindingSet(varNames, vf.createURI("urn:Alice"), 
vf.createURI("urn:Hominidae")));
-        expected.add(new ListBindingSet(varNames, vf.createURI("urn:Alice"), 
vf.createURI("urn:Mammalia")));
-        expected.add(new ListBindingSet(varNames, vf.createURI("urn:Bigfoot"), 
vf.createURI("urn:Mammalia")));
-        expected.add(new ListBindingSet(varNames, vf.createURI("urn:Carol"), 
vf.createURI("urn:Hominidae")));
-        expected.add(new ListBindingSet(varNames, vf.createURI("urn:Hank"), 
vf.createURI("urn:Carnivora")));
-        expected.add(new ListBindingSet(varNames, vf.createURI("urn:Hank"), 
vf.createURI("urn:Mammalia")));
+        expected.add(new ListBindingSet(varNames, VF.createIRI("urn:Alice"), 
VF.createIRI("urn:Hominidae")));
+        expected.add(new ListBindingSet(varNames, VF.createIRI("urn:Alice"), 
VF.createIRI("urn:Mammalia")));
+        expected.add(new ListBindingSet(varNames, VF.createIRI("urn:Bigfoot"), 
VF.createIRI("urn:Mammalia")));
+        expected.add(new ListBindingSet(varNames, VF.createIRI("urn:Carol"), 
VF.createIRI("urn:Hominidae")));
+        expected.add(new ListBindingSet(varNames, VF.createIRI("urn:Hank"), 
VF.createIRI("urn:Carnivora")));
+        expected.add(new ListBindingSet(varNames, VF.createIRI("urn:Hank"), 
VF.createIRI("urn:Mammalia")));
         Assert.assertEquals(expected, new HashSet<>(solutions));
     }
 
@@ -393,9 +393,9 @@ public class InferenceIT extends TestCase {
         conn.prepareUpdate(QueryLanguage.SPARQL, instances).execute();
         conn.prepareTupleQuery(QueryLanguage.SPARQL, 
query).evaluate(resultHandler);
         final Set<Value> expected = new HashSet<>();
-        expected.add(vf.createURI("urn:Bob"));
-        expected.add(vf.createURI("urn:Carol"));
-        expected.add(vf.createURI("urn:Eve"));
+        expected.add(VF.createIRI("urn:Bob"));
+        expected.add(VF.createIRI("urn:Carol"));
+        expected.add(VF.createIRI("urn:Eve"));
         final Set<Value> returned = new HashSet<>();
         for (final BindingSet bs : solutions) {
             returned.add(bs.getBinding("x").getValue());
@@ -433,36 +433,36 @@ public class InferenceIT extends TestCase {
         final String motherQuery = "SELECT ?individual { GRAPH 
<http://updated/test> { ?individual rdf:type <urn:Mother> } } \n";
         conn.prepareTupleQuery(QueryLanguage.SPARQL, 
motherQuery).evaluate(resultHandler);
         final Set<BindingSet> expectedMothers = new HashSet<>();
-        expectedMothers.add(new ListBindingSet(varNames, 
vf.createURI("urn:Susan")));
+        expectedMothers.add(new ListBindingSet(varNames, 
VF.createIRI("urn:Susan")));
         Assert.assertEquals(expectedMothers, new HashSet<>(solutions));
 
         // Find all <urn:Father> types (expect 1 result)
         final String fatherQuery = "SELECT ?individual { GRAPH 
<http://updated/test> { ?individual rdf:type <urn:Father> } } \n";
         conn.prepareTupleQuery(QueryLanguage.SPARQL, 
fatherQuery).evaluate(resultHandler);
         final Set<BindingSet> expectedFathers = new HashSet<>();
-        expectedFathers.add(new ListBindingSet(varNames, 
vf.createURI("urn:Bob")));
+        expectedFathers.add(new ListBindingSet(varNames, 
VF.createIRI("urn:Bob")));
         Assert.assertEquals(expectedFathers, new HashSet<>(solutions));
 
         // Find all <urn:Parent> types (expect 2 results)
         final String parentQuery = "SELECT ?individual { GRAPH 
<http://updated/test> { ?individual rdf:type <urn:Parent> } } \n";
         conn.prepareTupleQuery(QueryLanguage.SPARQL, 
parentQuery).evaluate(resultHandler);
         final Set<BindingSet> expectedParents = new HashSet<>();
-        expectedParents.add(new ListBindingSet(varNames, 
vf.createURI("urn:Bob")));
-        expectedParents.add(new ListBindingSet(varNames, 
vf.createURI("urn:Susan")));
+        expectedParents.add(new ListBindingSet(varNames, 
VF.createIRI("urn:Bob")));
+        expectedParents.add(new ListBindingSet(varNames, 
VF.createIRI("urn:Susan")));
         Assert.assertEquals(expectedParents, new HashSet<>(solutions));
 
         // Find all <urn:Woman> types (expect 1 result)
         final String womanQuery = "SELECT ?individual { GRAPH 
<http://updated/test> { ?individual rdf:type <urn:Woman> } } \n";
         conn.prepareTupleQuery(QueryLanguage.SPARQL, 
womanQuery).evaluate(resultHandler);
         final Set<BindingSet> expectedWomen = new HashSet<>();
-        expectedWomen.add(new ListBindingSet(varNames, 
vf.createURI("urn:Susan")));
+        expectedWomen.add(new ListBindingSet(varNames, 
VF.createIRI("urn:Susan")));
         Assert.assertEquals(expectedWomen, new HashSet<>(solutions));
 
         // Find all <urn:Man> types (expect 1 result)
         final String manQuery = "SELECT ?individual { GRAPH 
<http://updated/test> { ?individual rdf:type <urn:Man> } } \n";
         conn.prepareTupleQuery(QueryLanguage.SPARQL, 
manQuery).evaluate(resultHandler);
         final Set<BindingSet> expectedMen = new HashSet<>();
-        expectedMen.add(new ListBindingSet(varNames, vf.createURI("urn:Bob")));
+        expectedMen.add(new ListBindingSet(varNames, VF.createIRI("urn:Bob")));
         Assert.assertEquals(expectedMen, new HashSet<>(solutions));
     }
 
@@ -540,11 +540,11 @@ public class InferenceIT extends TestCase {
         final String cardSuitQuery = "SELECT ?card { GRAPH 
<http://updated/test> { ?card a <urn:Card> . ?suit a <urn:Suits> . ?card 
<urn:HasSuit> ?suit} } \n";
         conn.prepareTupleQuery(QueryLanguage.SPARQL, 
cardSuitQuery).evaluate(resultHandler);
         final Set<BindingSet> expectedCardSuits = new HashSet<>();
-        expectedCardSuits.add(new ListBindingSet(varNames, 
vf.createURI("urn:FlopCard1")));
-        expectedCardSuits.add(new ListBindingSet(varNames, 
vf.createURI("urn:FlopCard2")));
-        expectedCardSuits.add(new ListBindingSet(varNames, 
vf.createURI("urn:FlopCard3")));
-        expectedCardSuits.add(new ListBindingSet(varNames, 
vf.createURI("urn:TurnCard")));
-        expectedCardSuits.add(new ListBindingSet(varNames, 
vf.createURI("urn:RiverCard")));
+        expectedCardSuits.add(new ListBindingSet(varNames, 
VF.createIRI("urn:FlopCard1")));
+        expectedCardSuits.add(new ListBindingSet(varNames, 
VF.createIRI("urn:FlopCard2")));
+        expectedCardSuits.add(new ListBindingSet(varNames, 
VF.createIRI("urn:FlopCard3")));
+        expectedCardSuits.add(new ListBindingSet(varNames, 
VF.createIRI("urn:TurnCard")));
+        expectedCardSuits.add(new ListBindingSet(varNames, 
VF.createIRI("urn:RiverCard")));
         Assert.assertEquals(expectedCardSuits.size(), solutions.size());
         Assert.assertEquals(expectedCardSuits, new HashSet<>(solutions));
 
@@ -552,11 +552,11 @@ public class InferenceIT extends TestCase {
         final String cardRankQuery = "SELECT ?card { GRAPH 
<http://updated/test> { ?card a <urn:Card> . ?rank a <urn:Ranks> . ?card 
<urn:HasRank> ?rank} } \n";
         conn.prepareTupleQuery(QueryLanguage.SPARQL, 
cardRankQuery).evaluate(resultHandler);
         final Set<BindingSet> expectedCardRanks = new HashSet<>();
-        expectedCardRanks.add(new ListBindingSet(varNames, 
vf.createURI("urn:FlopCard1")));
-        expectedCardRanks.add(new ListBindingSet(varNames, 
vf.createURI("urn:FlopCard2")));
-        expectedCardRanks.add(new ListBindingSet(varNames, 
vf.createURI("urn:FlopCard3")));
-        expectedCardRanks.add(new ListBindingSet(varNames, 
vf.createURI("urn:TurnCard")));
-        expectedCardRanks.add(new ListBindingSet(varNames, 
vf.createURI("urn:RiverCard")));
+        expectedCardRanks.add(new ListBindingSet(varNames, 
VF.createIRI("urn:FlopCard1")));
+        expectedCardRanks.add(new ListBindingSet(varNames, 
VF.createIRI("urn:FlopCard2")));
+        expectedCardRanks.add(new ListBindingSet(varNames, 
VF.createIRI("urn:FlopCard3")));
+        expectedCardRanks.add(new ListBindingSet(varNames, 
VF.createIRI("urn:TurnCard")));
+        expectedCardRanks.add(new ListBindingSet(varNames, 
VF.createIRI("urn:RiverCard")));
         Assert.assertEquals(expectedCardRanks.size(), solutions.size());
         Assert.assertEquals(expectedCardRanks, new HashSet<>(solutions));
     }
@@ -580,8 +580,8 @@ public class InferenceIT extends TestCase {
         final List<String> varNames = new LinkedList<>();
         varNames.add("who");
         varNames.add("self");
-        expected.add(new ListBindingSet(varNames, vf.createURI("urn:Alice"), 
vf.createURI("urn:Alice")));
-        expected.add(new ListBindingSet(varNames, 
vf.createURI("urn:Narcissus"), vf.createURI("urn:Narcissus")));
+        expected.add(new ListBindingSet(varNames, VF.createIRI("urn:Alice"), 
VF.createIRI("urn:Alice")));
+        expected.add(new ListBindingSet(varNames, 
VF.createIRI("urn:Narcissus"), VF.createIRI("urn:Narcissus")));
         Assert.assertEquals(expected, new HashSet<>(solutions));
 
         query = "SELECT ?self { GRAPH <http://updated/test> { <urn:Alice> 
<urn:love> ?self } } \n";
@@ -589,7 +589,7 @@ public class InferenceIT extends TestCase {
         expected.clear();
         varNames.clear();
         varNames.add("self");
-        expected.add(new ListBindingSet(varNames, vf.createURI("urn:Alice")));
+        expected.add(new ListBindingSet(varNames, VF.createIRI("urn:Alice")));
         Assert.assertEquals(expected, new HashSet<>(solutions));
 
         query = "SELECT ?who { GRAPH <http://updated/test> { ?who <urn:love> 
<urn:Alice> } } \n";
@@ -597,7 +597,7 @@ public class InferenceIT extends TestCase {
         expected.clear();
         varNames.clear();
         varNames.add("who");
-        expected.add(new ListBindingSet(varNames, vf.createURI("urn:Alice")));
+        expected.add(new ListBindingSet(varNames, VF.createIRI("urn:Alice")));
         Assert.assertEquals(expected, new HashSet<>(solutions));
 
         query = "SELECT ?who { GRAPH <http://updated/test> { ?who a 
<urn:Narcissist> } } \n";
@@ -605,8 +605,8 @@ public class InferenceIT extends TestCase {
         expected.clear();
         varNames.clear();
         varNames.add("who");
-        expected.add(new ListBindingSet(varNames, 
vf.createURI("urn:Narcissus")));
-        expected.add(new ListBindingSet(varNames, vf.createURI("urn:Alice")));
+        expected.add(new ListBindingSet(varNames, 
VF.createIRI("urn:Narcissus")));
+        expected.add(new ListBindingSet(varNames, VF.createIRI("urn:Alice")));
         Assert.assertEquals(expected, new HashSet<>(solutions));
     }
 
@@ -622,10 +622,10 @@ public class InferenceIT extends TestCase {
         conn.prepareUpdate(QueryLanguage.SPARQL, ontology).execute();
         conn.prepareUpdate(QueryLanguage.SPARQL, instances).execute();
         inferenceEngine.refreshGraph();
-        final URI alice = vf.createURI("urn:Alice");
-        final URI bob = vf.createURI("urn:Bob");
-        final URI carol = vf.createURI("urn:Carol");
-        final URI eve = vf.createURI("urn:Eve");
+        final IRI alice = VF.createIRI("urn:Alice");
+        final IRI bob = VF.createIRI("urn:Bob");
+        final IRI carol = VF.createIRI("urn:Carol");
+        final IRI eve = VF.createIRI("urn:Eve");
         final List<String> varNames = new LinkedList<>();
         varNames.add("x");
         final Set<BindingSet> aliceAndBob = new HashSet<>();
@@ -665,8 +665,8 @@ public class InferenceIT extends TestCase {
 
         // Query where subject and object are unrestricted variables: match
         // every known node (dangerous, but correct)
-        final URI hasFamily = vf.createURI("urn:hasFamilyMember");
-        final URI rp = vf.createURI(OWL.NAMESPACE, "ReflexiveProperty");
+        final IRI hasFamily = VF.createIRI("urn:hasFamilyMember");
+        final IRI rp = VF.createIRI(OWL.NAMESPACE, "ReflexiveProperty");
         final Set<BindingSet> everything = new HashSet<>();
         everything.add(new ListBindingSet(varNames, alice, alice));
         everything.add(new ListBindingSet(varNames, bob, bob));

http://git-wip-us.apache.org/repos/asf/incubator-rya/blob/81b99327/sail/src/test/java/org/apache/rya/rdftriplestore/inference/IntersectionOfVisitorTest.java
----------------------------------------------------------------------
diff --git 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/IntersectionOfVisitorTest.java
 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/IntersectionOfVisitorTest.java
index 58551a5..93585e5 100644
--- 
a/sail/src/test/java/org/apache/rya/rdftriplestore/inference/IntersectionOfVisitorTest.java
+++ 
b/sail/src/test/java/org/apache/rya/rdftriplestore/inference/IntersectionOfVisitorTest.java
@@ -31,19 +31,19 @@ import java.util.Map;
 import java.util.Set;
 
 import org.apache.rya.accumulo.AccumuloRdfConfiguration;
+import org.eclipse.rdf4j.model.IRI;
+import org.eclipse.rdf4j.model.Resource;
+import org.eclipse.rdf4j.model.ValueFactory;
+import org.eclipse.rdf4j.model.impl.SimpleValueFactory;
+import org.eclipse.rdf4j.model.vocabulary.RDF;
+import org.eclipse.rdf4j.query.algebra.Join;
+import org.eclipse.rdf4j.query.algebra.Projection;
+import org.eclipse.rdf4j.query.algebra.ProjectionElem;
+import org.eclipse.rdf4j.query.algebra.ProjectionElemList;
+import org.eclipse.rdf4j.query.algebra.StatementPattern;
+import org.eclipse.rdf4j.query.algebra.Union;
+import org.eclipse.rdf4j.query.algebra.Var;
 import org.junit.Test;
-import org.openrdf.model.Resource;
-import org.openrdf.model.URI;
-import org.openrdf.model.ValueFactory;
-import org.openrdf.model.impl.ValueFactoryImpl;
-import org.openrdf.model.vocabulary.RDF;
-import org.openrdf.query.algebra.Join;
-import org.openrdf.query.algebra.Projection;
-import org.openrdf.query.algebra.ProjectionElem;
-import org.openrdf.query.algebra.ProjectionElemList;
-import org.openrdf.query.algebra.StatementPattern;
-import org.openrdf.query.algebra.Union;
-import org.openrdf.query.algebra.Var;
 
 import com.google.common.collect.Sets;
 
@@ -52,22 +52,22 @@ import com.google.common.collect.Sets;
  */
 public class IntersectionOfVisitorTest {
     private final AccumuloRdfConfiguration conf = new 
AccumuloRdfConfiguration();
-    private static final ValueFactory VF = new ValueFactoryImpl();
+    private static final ValueFactory VF = SimpleValueFactory.getInstance();
 
-    private static final URI MOTHER = VF.createURI("urn:Mother");
-    private static final URI FATHER = VF.createURI("urn:Father");
+    private static final IRI MOTHER = VF.createIRI("urn:Mother");
+    private static final IRI FATHER = VF.createIRI("urn:Father");
 
     // Definition #1: :Mother owl:intersectionOf(:Animal, :Female, :Parent)
-    private static final URI ANIMAL = VF.createURI("urn:Animal");
-    private static final URI FEMALE = VF.createURI("urn:Female");
-    private static final URI PARENT = VF.createURI("urn:Parent");
+    private static final IRI ANIMAL = VF.createIRI("urn:Animal");
+    private static final IRI FEMALE = VF.createIRI("urn:Female");
+    private static final IRI PARENT = VF.createIRI("urn:Parent");
 
     // Definition #2: :Mother owl:intersectionOf(:Female, :Leader, :Nun)
-    private static final URI NUN = VF.createURI("urn:Nun");
-    private static final URI LEADER = VF.createURI("urn:Leader");
+    private static final IRI NUN = VF.createIRI("urn:Nun");
+    private static final IRI LEADER = VF.createIRI("urn:Leader");
 
     // Definition #3: :Father owl:intersectionOf(:Man, :Parent)
-    private static final URI MAN = VF.createURI("urn:Man");
+    private static final IRI MAN = VF.createIRI("urn:Man");
 
     @Test
     public void testIntersectionOf() throws Exception {
@@ -226,7 +226,7 @@ public class IntersectionOfVisitorTest {
         assertEquals(expectedFatherSp, actualFatherSp);
     }
 
-    private static void assertStatementPattern(final StatementPattern 
statementPattern, final URI uri) {
+    private static void assertStatementPattern(final StatementPattern 
statementPattern, final IRI uri) {
         assertNotNull(statementPattern.getPredicateVar());
         assertEquals(RDF.TYPE, statementPattern.getPredicateVar().getValue());
         assertNotNull(statementPattern.getObjectVar());

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