diff --git a/Java/net.alcetech.UniversalEditor.Core/src/net/alcetech/UniversalEditor/Core/DataFormat.java b/Java/net.alcetech.UniversalEditor.Core/src/net/alcetech/UniversalEditor/Core/DataFormat.java
index c046fc50..db7c13be 100644
--- a/Java/net.alcetech.UniversalEditor.Core/src/net/alcetech/UniversalEditor/Core/DataFormat.java
+++ b/Java/net.alcetech.UniversalEditor.Core/src/net/alcetech/UniversalEditor/Core/DataFormat.java
@@ -1,9 +1,64 @@
 package net.alcetech.UniversalEditor.Core;
 
+import java.util.Stack;
+
 public abstract class DataFormat
 {
-	public DataFormatReference getDataFormatReference()
-	{
+	public DataFormatReference getDataFormatReference() {
 		return new DataFormatReference(this.getClass().getName());
 	}
+	
+	private Accessor _accessor = null;
+	public Accessor getAccessor() {
+		return _accessor;
+	}
+	public void setAccessor(Accessor value) {
+		_accessor = value;
+	}
+	
+	protected void beforeLoadInternal(Stack<ObjectModel> objectModels) {
+		// virtual
+	}
+	protected void afterLoadInternal(Stack<ObjectModel> objectModels ) {
+		// virtual
+	}
+	protected abstract void loadInternal(ObjectModel objectModel);
+	
+	public void load(ObjectModel objectModel) {
+		if (objectModel == null)
+			throw new NullPointerException();
+		
+		Stack<ObjectModel> stack = new Stack<ObjectModel>();
+		stack.push(objectModel);
+		beforeLoadInternal(stack);
+		
+		ObjectModel omb = stack.pop();
+		loadInternal(omb);
+		stack.push(omb);
+		
+		afterLoadInternal(stack);
+	}
+
+	protected void beforeSaveInternal(Stack<ObjectModel> objectModels) {
+		// virtual
+	}
+	protected void afterSaveInternal(Stack<ObjectModel> objectModels ) {
+		// virtual
+	}
+	protected abstract void saveInternal(ObjectModel objectModel);
+	
+	public void save(ObjectModel objectModel) {
+		if (objectModel == null)
+			throw new NullPointerException();
+		
+		Stack<ObjectModel> stack = new Stack<ObjectModel>();
+		stack.push(objectModel);
+		beforeSaveInternal(stack);
+		
+		ObjectModel omb = stack.pop();
+		saveInternal(omb);
+		stack.push(omb);
+		
+		afterSaveInternal(stack);
+	}
 }