diff --git a/src/main/java/models/objectOrientedTransfer/DataTransferContext.java b/src/main/java/models/objectOrientedTransfer/DataTransferContext.java
index e5e6ad9..bb3163f 100644
--- a/src/main/java/models/objectOrientedTransfer/DataTransferContext.java
+++ b/src/main/java/models/objectOrientedTransfer/DataTransferContext.java
@@ -10,29 +10,35 @@
  *
  */
 public class DataTransferContext {
-	private List<ReferenceEdge> srcResource;
-	private List<ReferenceEdge> dstResource;
+	private List<Relation> relations;
+	private Relation transferRelation;
 	private StatefulObjectNode dataType;
 	private String dataName;
 	private PushPullValue transferStyle;
-	private MultiplicityValue transferMultiplicity;
 	
-	public DataTransferContext(List<ReferenceEdge> srcResource, List<ReferenceEdge> dstResource, 
+	public DataTransferContext(List<Relation> relations, Relation transferRelation, 
 			StatefulObjectNode dataType, String dataName, PushPullValue transferStyle, MultiplicityValue transferMultiplicity) {
-		this.srcResource = srcResource;
-		this.dstResource = dstResource;
+		this.relations = relations;
+		this.transferRelation = transferRelation;
 		this.dataType = dataType;
 		this.dataName = dataName;
 		this.transferStyle = transferStyle;
-		this.transferMultiplicity = transferMultiplicity;
 	}
-
+	
+	public List<Relation> getRelations() {
+		return relations;
+	}
+	
 	public List<ReferenceEdge> getSrcResource() {
-		return srcResource;
+		return transferRelation.getSrcResource();
 	}
 
 	public List<ReferenceEdge> getDstResource() {
-		return dstResource;
+		return transferRelation.getDstResource();
+	}
+
+	public MultiplicityValue getTransferMultiplicity() {
+		return transferRelation.getMultiplicity();
 	}
 
 	public StatefulObjectNode getDataType() {
@@ -46,8 +52,4 @@
 	public PushPullValue getTransferStyle() {
 		return transferStyle;
 	}
-
-	public MultiplicityValue getTransferMultiplicity() {
-		return transferMultiplicity;
-	}
 }
diff --git a/src/main/java/models/objectOrientedTransfer/DataTransferDesign.java b/src/main/java/models/objectOrientedTransfer/DataTransferDesign.java
new file mode 100644
index 0000000..16fccbd
--- /dev/null
+++ b/src/main/java/models/objectOrientedTransfer/DataTransferDesign.java
@@ -0,0 +1,15 @@
+package models.objectOrientedTransfer;
+
+public class DataTransferDesign {
+	private DataTransferContext context;
+	private DeltaComplex deltaComplex;
+	
+	public DataTransferDesign(DataTransferContext context) {
+		this.context = context;
+		this.deltaComplex = createDefaultDeltaComlex(context);
+	}
+
+	public DeltaComplex createDefaultDeltaComlex(DataTransferContext context) {
+		return null;
+	}
+}
diff --git a/src/main/java/models/objectOrientedTransfer/MultiplicityValue.java b/src/main/java/models/objectOrientedTransfer/MultiplicityValue.java
index 2455abe..6af9ab1 100644
--- a/src/main/java/models/objectOrientedTransfer/MultiplicityValue.java
+++ b/src/main/java/models/objectOrientedTransfer/MultiplicityValue.java
@@ -3,7 +3,8 @@
 public enum MultiplicityValue {
 	OneToOne,
 	OneToMany,
-	ManyToOne;
+	ManyToOne,
+	ManyToMany;
 	
 	public String toString() {
 		switch (this) {
@@ -13,6 +14,8 @@
 			return "1:*";
 		case ManyToOne:
 			return "*:1";
+		case ManyToMany:
+			return "*:*";
 		default:
 			return "";				
 		}
diff --git a/src/main/java/models/objectOrientedTransfer/Relation.java b/src/main/java/models/objectOrientedTransfer/Relation.java
new file mode 100644
index 0000000..2938b37
--- /dev/null
+++ b/src/main/java/models/objectOrientedTransfer/Relation.java
@@ -0,0 +1,21 @@
+package models.objectOrientedTransfer;
+
+import java.util.List;
+
+public class Relation {
+	private List<ReferenceEdge> srcResource;
+	private List<ReferenceEdge> dstResource;
+	private MultiplicityValue multiplicity;
+	
+	public List<ReferenceEdge> getSrcResource() {
+		return srcResource;
+	}
+
+	public List<ReferenceEdge> getDstResource() {
+		return dstResource;
+	}
+
+	public MultiplicityValue getMultiplicity() {
+		return multiplicity;
+	}
+}