diff --git a/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/ABoxUpdater.java b/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/ABoxUpdater.java
index 1a2ff9a20..1ba6e6cff 100644
--- a/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/ABoxUpdater.java
+++ b/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/ABoxUpdater.java
@@ -302,7 +302,7 @@ public class ABoxUpdater {
 	    	 replacementProperty = newTboxModel.getOntProperty(parent.getURI()); 			
 		} 
 		
-		OntModel deletePropModel = ModelFactory.createOntologyModel();
+		Model deletePropModel = ModelFactory.createDefaultModel();
 		
 		if (replacementProperty == null) {
 			aboxModel.enterCriticalSection(Lock.WRITE);
diff --git a/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/OntologyUpdateSettings.java b/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/OntologyUpdateSettings.java
index 3521d84c9..0236e6f20 100644
--- a/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/OntologyUpdateSettings.java
+++ b/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/OntologyUpdateSettings.java
@@ -11,6 +11,7 @@ public class OntologyUpdateSettings {
 	private String diffFile;
 	private String logFile;
 	private String errorLogFile;
+	private String addedDataFile;
 	private String removedDataFile;
 	private OntModelSelector ontModelSelector;
 	
@@ -59,6 +60,12 @@ public class OntologyUpdateSettings {
 	public void setErrorLogFile(String errorLogFile) {
 		this.errorLogFile = errorLogFile;
 	}
+	public String getAddedDataFile() {
+		return addedDataFile;
+	}
+	public void setAddedDataFile(String addedDataFile) {
+		this.addedDataFile = addedDataFile;
+	}
 	public String getRemovedDataFile() {
 		return removedDataFile;
 	}
diff --git a/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/OntologyUpdater.java b/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/OntologyUpdater.java
index fd89a89ec..cf1da3741 100644
--- a/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/OntologyUpdater.java
+++ b/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/OntologyUpdater.java
@@ -36,9 +36,15 @@ public class OntologyUpdater {
 	private final Log log = LogFactory.getLog(OntologyUpdater.class);
 	
 	private OntologyUpdateSettings settings;
+	private OntologyChangeLogger logger;
+	private OntologyChangeRecord record;
 	
 	public OntologyUpdater(OntologyUpdateSettings settings) {
 		this.settings = settings;
+		this.logger = new SimpleOntologyChangeLogger(settings.getLogFile(),
+													settings.getErrorLogFile());
+		this.record = new SimpleOntologyChangeRecord(
+				settings.getAddedDataFile(), settings.getRemovedDataFile());
 	}
 	
 	public void update() throws IOException {	
@@ -75,8 +81,16 @@ public class OntologyUpdater {
 	
 
 	
-	private void updateABox(AtomicOntologyChangeLists changes) {
-		// perform operations based on change objects
+	private void updateABox(AtomicOntologyChangeLists changes) 
+			throws IOException {
+		// TODO get models from somewhere
+		OntModel oldTBoxModel = null;
+		OntModel newTBoxModel = null;
+		OntModel ABoxModel = null;
+		ABoxUpdater aboxUpdater = new ABoxUpdater(
+				oldTBoxModel, newTBoxModel, ABoxModel, logger, record);
+		aboxUpdater.processPropertyChanges(changes.getAtomicPropertyChanges());
+		aboxUpdater.processClassChanges(changes.getAtomicClassChanges());
 		// run additional SPARQL CONSTRUCTS 
 	}
 	
diff --git a/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/SimpleOntologyChangeRecord.java b/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/SimpleOntologyChangeRecord.java
index 030800d87..7c5b2ff1c 100644
--- a/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/SimpleOntologyChangeRecord.java
+++ b/webapp/src/edu/cornell/mannlib/vitro/webapp/ontology/update/SimpleOntologyChangeRecord.java
@@ -8,6 +8,7 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
 import com.hp.hpl.jena.rdf.model.Model;
+import com.hp.hpl.jena.rdf.model.ModelFactory;
 
 public class SimpleOntologyChangeRecord implements OntologyChangeRecord {
 
@@ -16,16 +17,13 @@ public class SimpleOntologyChangeRecord implements OntologyChangeRecord {
 	
 	private final static String RDF_SYNTAX = "RDF/XML-ABBREV";
 	
-	private Model additionsModel;
-	private Model retractionsModel;
+	private Model additionsModel = ModelFactory.createDefaultModel();
+	private Model retractionsModel = ModelFactory.createDefaultModel();
 	private File additionsFile;
 	private File retractionsFile;
 	
 	public SimpleOntologyChangeRecord(
-			Model additionsModel, Model retractionsModel,
 			String additionsFile, String retractionsFile) {
-		this.additionsModel = additionsModel;
-		this.retractionsModel = retractionsModel;
 		this.additionsFile = new File(additionsFile);
 		if (!this.additionsFile.exists()) {
 			throw new RuntimeException(this.getClass().getName() +