diff --git a/core/src/main/java/org/apache/sdap/mudrod/ontology/process/LocalOntology.java b/core/src/main/java/org/apache/sdap/mudrod/ontology/process/LocalOntology.java
index f106594..5800760 100644
--- a/core/src/main/java/org/apache/sdap/mudrod/ontology/process/LocalOntology.java
+++ b/core/src/main/java/org/apache/sdap/mudrod/ontology/process/LocalOntology.java
@@ -62,10 +62,8 @@ public LocalOntology() {
     //only initialize all the static variables
     //if first time called to this ontology constructor
     if (ontology == null) {
-      if (LOG.isInfoEnabled()) {
-        LOG.info("Creating new ontology");
-      }
-      parser = new OwlParser();
+      LOG.info("Creating new ontology client and parser implementation.");
+      parser = new OntologyParserImpl();
       ontology = this;
     }
     if (ontologyModel == null)
@@ -87,24 +85,25 @@ public Ontology getInstance() {
   }
 
   /**
-   * Load the default <i>sweetAll.owl</i> ontology
-   * from <a href="https://raw.githubusercontent.com/ESIPFed/sweet/master/2.4/sweetAll.owl">
-   * https://raw.githubusercontent.com/ESIPFed/sweet/master/2.4/sweetAll.owl</a>
+   * Load the default <i>sweetAll.ttl</i> ontology
+   * from <a href="http://sweetontology.net/sweetAll.ttl">
+   * http://sweetontology.net/sweetAll.ttl</a>
    */
   @Override
   public void load() {
     URL ontURL = null;
     try {
-      ontURL = new URL("https://raw.githubusercontent.com/ESIPFed/sweet/master/2.4/sweetAll.owl");
-      //ontURL = new URL("https://raw.githubusercontent.com/ESIPFed/sweet/master/2.4/reprDataProduct.owl");
+      ontURL = new URL("http://sweetontology.net/sweetAll.ttl");
     } catch (MalformedURLException e) {
       LOG.error("Error when attempting to create URL resource: ", e);
     }
     ontArrayList = new ArrayList<>();
-    try {
-      ontArrayList.add(ontURL.toURI().toString());
-    } catch (URISyntaxException e) {
-      LOG.error("Error in URL syntax, please check your Ontology resource: ", e);
+    if (ontURL != null) {
+      try {
+        ontArrayList.add(ontURL.toURI().toString());
+      } catch (URISyntaxException e) {
+        LOG.error("Error in URL syntax, please check your Ontology resource: ", e);
+      }
     }
     if (!ontArrayList.isEmpty()) {
       load(ontArrayList.stream().toArray(String[]::new));
@@ -126,8 +125,21 @@ public void load(String[] urls) {
   }
 
   private void load(Object m, String url) {
+    String lang = null;
     try {
-      ((OntModel) m).read(url, null, null);
+      switch (url.substring(url.lastIndexOf('.') + 1)) {
+        case "ttl":
+        lang = "TURTLE";
+        break;
+        //null represents the default language, "RDF/XML".
+        //"RDF/XML-ABBREV" is a synonym for "RDF/XML".
+        case "rdf":
+        case "owl": {
+          lang = "RDF/XML";
+          break;
+        }
+      }
+      ((OntModel) m).read(url, null, lang);
       LOG.info("Successfully processed {}", url);
     } catch (Exception e) {
       LOG.error("Failed whilst attempting to read ontology {}: Error: ", url, e);
@@ -141,7 +153,7 @@ private void load(Object m, String url) {
    */
   public OntologyParser getParser() {
     if (parser == null) {
-      parser = new OwlParser();
+      parser = new OntologyParserImpl();
     }
     return parser;
   }
@@ -229,6 +241,7 @@ public Iterator<String> subclasses(String entitySearchTerm) {
    * @return an {@link java.util.Iterator} containing synonyms string tokens
    * or an empty if no synonyms exist for the given queryKeyPhrase.
    */
+  @SuppressWarnings("unchecked")
   @Override
   public Iterator synonyms(String queryKeyPhrase) {
 
diff --git a/core/src/main/java/org/apache/sdap/mudrod/ontology/process/OwlParser.java b/core/src/main/java/org/apache/sdap/mudrod/ontology/process/OntologyParserImpl.java
similarity index 97%
rename from core/src/main/java/org/apache/sdap/mudrod/ontology/process/OwlParser.java
rename to core/src/main/java/org/apache/sdap/mudrod/ontology/process/OntologyParserImpl.java
index 3f12cd6..6376f28 100644
--- a/core/src/main/java/org/apache/sdap/mudrod/ontology/process/OwlParser.java
+++ b/core/src/main/java/org/apache/sdap/mudrod/ontology/process/OntologyParserImpl.java
@@ -32,12 +32,12 @@
  * implementation for <a href="http://www.w3.org/TR/owl-features/">W3C OWL</a> 
  * files.
  */
-public class OwlParser implements OntologyParser {
+public class OntologyParserImpl implements OntologyParser {
   
   private Ontology ont;
   private List<OntClass> roots = new ArrayList<>();
 
-  public OwlParser() {
+  public OntologyParserImpl() {
     //default constructor
   }
 
@@ -122,7 +122,7 @@ public Iterator<OntClass> rootClasses(OntModel m) {
       //assume ontology has root classes
       processSingle(m);
     } else {
-      //check for presence of aggregate/collection ontologies such as sweetAll.owl
+      //check for presence of aggregate/collection ontologies such as sweetAll.ttl
       processCollection(m);
     }
 
diff --git a/core/src/main/java/org/apache/sdap/mudrod/recommendation/pre/NormalizeFeatures.java b/core/src/main/java/org/apache/sdap/mudrod/recommendation/pre/NormalizeFeatures.java
index 458ccbb..7e51933 100644
--- a/core/src/main/java/org/apache/sdap/mudrod/recommendation/pre/NormalizeFeatures.java
+++ b/core/src/main/java/org/apache/sdap/mudrod/recommendation/pre/NormalizeFeatures.java
@@ -35,7 +35,6 @@
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Properties;
-import java.util.regex.Pattern;
 
 public class NormalizeFeatures extends DiscoveryStepAbstract {
 
diff --git a/core/src/test/java/org/apache/sdap/mudrod/ontology/process/TestLocalOntology.java b/core/src/test/java/org/apache/sdap/mudrod/ontology/process/TestLocalOntology.java
index 192a29b..587a9ed 100644
--- a/core/src/test/java/org/apache/sdap/mudrod/ontology/process/TestLocalOntology.java
+++ b/core/src/test/java/org/apache/sdap/mudrod/ontology/process/TestLocalOntology.java
@@ -13,7 +13,10 @@
  */
 package org.apache.sdap.mudrod.ontology.process;
 
-import static org.junit.Assert.*;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
 
 import java.io.IOException;
 
diff --git a/pom.xml b/pom.xml
index 6d1414d..706e30d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -129,7 +129,7 @@
     <findbugs.version>3.0.4</findbugs.version>
     <xml.maven.version>1.0.1</xml.maven.version>
     <jacoco.version>0.8.0</jacoco.version>
-    <jena.version>3.3.0</jena.version>
+    <jena.version>3.6.0</jena.version>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <elastic.version>5.2.0</elastic.version>
   </properties>
@@ -494,6 +494,12 @@
         <version>${jena.version}</version>
         <scope>compile</scope>
       </dependency>
+      <dependency>
+        <groupId>org.apache.jena</groupId>
+        <artifactId>apache-jena-libs</artifactId>
+        <type>pom</type>
+        <version>${jena.version}</version>
+      </dependency>
       <!-- End of Jena dependencies -->
       <!-- Misc dependencies -->
       <dependency>