--- a
+++ b/src/net/timbusproject/dpes/alternative/AlternativesBuilder/ChangesOntologyBuilder.java
@@ -0,0 +1,94 @@
+/**
+ * Copyright (c) 2013/2014 Verein zur Foerderung der IT-Sicherheit in Oesterreich (SBA).
+ * The work has been developed in the TIMBUS Project and the above-mentioned are Members of the TIMBUS Consortium.
+ * TIMBUS is supported by the European Union under the 7th Framework Programme for research and technological
+ * development and demonstration activities (FP7/2007-2013) under grant agreement no. 269940.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including without
+ * limitation, any warranties or conditions of TITLE, NON-INFRINGEMENT, MERCHANTIBITLY, or FITNESS FOR A PARTICULAR
+ * PURPOSE. In no event and under no legal theory, whether in tort (including negligence), contract, or otherwise,
+ * unless required by applicable law or agreed to in writing, shall any Contributor be liable for damages, including
+ * any direct, indirect, special, incidental, or consequential damages of any character arising as a result of this
+ * License or out of the use or inability to use the Work.
+ * See the License for the specific language governing permissions and limitation under the License.
+ */
+
+package net.timbusproject.dpes.alternative.AlternativesBuilder;
+
+import org.semanticweb.owlapi.apibinding.OWLManager;
+import org.semanticweb.owlapi.model.*;
+import uk.ac.manchester.cs.owl.owlapi.OWLOntologyImpl;
+
+import java.util.Collections;
+import java.util.Set;
+
+/**
+ * Builder for the ontology that states the changes between the original and the modified model.
+ */
+public class ChangesOntologyBuilder {
+
+    private static final String IRIPREFIX_CHANGES = "http://timbus.teco.edu/ontologies/preservationChanges/";
+
+    private static final IRI IRI_PREMIS = IRI.create("http://multimedialab.elis.ugent.be/users/samcoppe/ontologies/Premis/premis.owl");
+
+    private static final OWLClass PREMIS_EVENT_CLASS = OWLManager.getOWLDataFactory().getOWLClass(
+            IRI.create(IRI_PREMIS.toString() + "#", "Event"));
+
+    private static final OWLObjectProperty PREMIS_LINKING_SOURCE_OBJECTPROPERTY = OWLManager.getOWLDataFactory().getOWLObjectProperty(
+            IRI.create(IRI_PREMIS.toString() + "#", "linkingSourceObject"));
+
+    private static final OWLObjectProperty PREMIS_LINKING_OUTCOME_OBJECTPROPERTY = OWLManager.getOWLDataFactory().getOWLObjectProperty(
+            IRI.create(IRI_PREMIS.toString() + "#", "linkingOutcomeObject"));
+
+    private static final Set<OWLAnnotation> EMPTY_OWL_ANNOTATIONS = Collections.emptySet();
+    private final OWLOntology originalModel;
+    private final OWLNamedIndividual individualInOriginalModel;
+    private final String replacementName;
+
+    public ChangesOntologyBuilder(OWLOntology originalModel, OWLNamedIndividual individualInOriginalModel, String replacementName) {
+        this.originalModel = originalModel;
+        this.individualInOriginalModel = individualInOriginalModel;
+        this.replacementName = replacementName;
+    }
+
+    public OWLOntology createChangesOntology(String iriSuffix, OWLOntology modifiedModel, OWLNamedIndividual individualInModifiedModel) {
+        IRI iri = IRI.create(IRIPREFIX_CHANGES, iriSuffix);
+        // Finally, create the ontology that contains the PREMIS events
+        OWLOntology eventsOntology = new OWLOntologyImpl(modifiedModel.getOWLOntologyManager(),
+                new OWLOntologyID(iri));
+        OWLOntologyManager eventsOntologyManager = eventsOntology.getOWLOntologyManager();
+        OWLDataFactory eventsDataFactory = eventsOntologyManager.getOWLDataFactory();
+
+        // import PREMIS OWL
+        eventsOntologyManager.applyChange(new AddImport(eventsOntology,
+                eventsDataFactory.getOWLImportsDeclaration(IRI_PREMIS)));
+        eventsOntologyManager.applyChange(new AddImport(
+                eventsOntology,
+                eventsDataFactory.getOWLImportsDeclaration(originalModel.getOntologyID().getOntologyIRI())));
+        eventsOntologyManager.applyChange(new AddImport(
+                eventsOntology,
+                eventsDataFactory.getOWLImportsDeclaration(modifiedModel.getOntologyID().getOntologyIRI())));
+
+        // Make a new event individual
+        OWLNamedIndividual eventIndividual = eventsDataFactory.getOWLNamedIndividual(IRI.create(
+                iri.getNamespace(), replacementName));
+        OWLClassAssertionAxiom eventClassAxiom = eventsDataFactory.getOWLClassAssertionAxiom(
+                PREMIS_EVENT_CLASS, eventIndividual);
+        eventsOntologyManager.applyChange(new AddAxiom(eventsOntology, eventClassAxiom));
+
+        // Link the event individual to the entities
+        OWLObjectPropertyAssertionAxiom linkingSourceObjectPropertyAxiom = eventsDataFactory.getOWLObjectPropertyAssertionAxiom(
+                PREMIS_LINKING_SOURCE_OBJECTPROPERTY, eventIndividual, individualInOriginalModel,
+                EMPTY_OWL_ANNOTATIONS);
+        eventsOntologyManager.applyChange(new AddAxiom(eventsOntology, linkingSourceObjectPropertyAxiom));
+        OWLObjectPropertyAssertionAxiom linkingOutcomeObjectPropertyAxiom = eventsDataFactory.getOWLObjectPropertyAssertionAxiom(
+                PREMIS_LINKING_OUTCOME_OBJECTPROPERTY, eventIndividual, individualInModifiedModel,
+                EMPTY_OWL_ANNOTATIONS);
+        eventsOntologyManager.applyChange(new AddAxiom(eventsOntology,
+                linkingOutcomeObjectPropertyAxiom));
+        return eventsOntology;
+    }
+}