diff --git a/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/AbstractVMLayoutNode.java b/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/AbstractVMLayoutNode.java
index e749e482e9e..a9b5463c5d6 100644
--- a/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/AbstractVMLayoutNode.java
+++ b/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/AbstractVMLayoutNode.java
@@ -24,12 +24,12 @@ import org.eclipse.dd.dsf.concurrent.MultiRequestMonitor;
 import org.eclipse.dd.dsf.concurrent.RequestMonitor;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenCountUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate;
-import org.eclipse.debug.internal.ui.viewers.model.provisional.IColumnPresentationFactoryAdapter;
+import org.eclipse.debug.internal.ui.viewers.model.provisional.IColumnPresentationFactory;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementContentProvider;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IHasChildrenUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.ILabelUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelDelta;
-import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelProxyFactoryAdapter;
+import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelProxyFactory;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate;
 import org.eclipse.jface.viewers.TreePath;
@@ -344,7 +344,17 @@ abstract public class AbstractVMLayoutNode implements IVMLayoutNode {
         update.done();
     }
     
-    public static class AbstractVMContext implements IVMContext {
+    /**
+     * Implementation of basic View Model Context node functionality.  The main
+     * purpose of the VMC wrapper is to re-direct adapter queries to the IVMAdapter
+     * and the layout node that the given context was created by.
+     * <p> 
+     * Note: Deriving classes must override the Object.equals/hashCode methods.
+     * This is because the VMC objects are just wrappers that are created
+     * by the view model on demand, so the equals methods must use the object
+     * being wrapped by the VMC to perform a meaningful comparison.    
+     */
+    abstract public static class AbstractVMContext implements IVMContext {
         protected final IVMAdapter fVMAdapter;
         protected final IVMLayoutNode fLayoutNode;
         
@@ -359,8 +369,8 @@ abstract public class AbstractVMLayoutNode implements IVMLayoutNode {
          * IAdapter implementation returns the IVMAdapter instance for the 
          * interfaces that are actually implemented by the VM Adapter.  These
          * should at least include {@link IElementContentProvider}, 
-         * {@link IModelProxyFactoryAdapter}, and 
-         * {@link IColumnPresentationFactoryAdapter}.
+         * {@link IModelProxyFactory}, and 
+         * {@link IColumnPresentationFactory}.
          */
         @SuppressWarnings("unchecked")
         public Object getAdapter(Class adapter) {
@@ -371,6 +381,14 @@ abstract public class AbstractVMLayoutNode implements IVMLayoutNode {
             }
             return null;
         }
+
+        /** Deriving classes must override. */
+        @Override
+        abstract public boolean equals(Object obj);
+        
+        /** Deriving classes must override. */
+        @Override
+        abstract public int hashCode();
     }
     
     protected class ViewerUpdate implements IViewerUpdate {
diff --git a/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/AbstractVMProvider.java b/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/AbstractVMProvider.java
index 227365734e7..27515202f9a 100644
--- a/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/AbstractVMProvider.java
+++ b/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/AbstractVMProvider.java
@@ -33,7 +33,7 @@ import org.eclipse.dd.dsf.ui.DsfUIPlugin;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenCountUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IColumnPresentation;
-import org.eclipse.debug.internal.ui.viewers.model.provisional.IColumnPresentationFactoryAdapter;
+import org.eclipse.debug.internal.ui.viewers.model.provisional.IColumnPresentationFactory;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IHasChildrenUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelDelta;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelProxy;
@@ -42,7 +42,6 @@ import org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate;
 import org.eclipse.debug.internal.ui.viewers.provisional.AbstractModelProxy;
 import org.eclipse.debug.internal.ui.viewers.provisional.IAsynchronousContentAdapter;
 import org.eclipse.debug.internal.ui.viewers.provisional.IAsynchronousLabelAdapter;
-import org.eclipse.debug.internal.ui.viewers.provisional.IColumnEditorFactoryAdapter;
 import org.eclipse.jface.viewers.TreePath;
 import org.eclipse.jface.viewers.Viewer;
 
@@ -392,11 +391,11 @@ abstract public class AbstractVMProvider implements IVMProvider
      * the tree/table, so the VMProvider must be configured to own the root element 
      * in the view in order for this setting to be effective.   
      * <p>
-     * Note: since the IColumnEditorFactoryAdapter interface is synchronous, and since
+     * Note: since the IColumnEditorFactory interface is synchronous, and since
      * column info is fairly static, this method is thread-safe, and it will
      * not be called on the executor thread.
      * 
-     * @see IColumnPresentationFactoryAdapter#createColumnPresentation(IPresentationContext, Object)
+     * @see IColumnPresentationFactory#createColumnPresentation(IPresentationContext, Object)
      */
     public IColumnPresentation createColumnPresentation(IPresentationContext context, Object element) {
         return null;
@@ -411,11 +410,11 @@ abstract public class AbstractVMProvider implements IVMProvider
      * the tree/table, so the VMProvider must be configured to own the root element 
      * in the view in order for this setting to be effective.   
      * <p>
-     * Note: since the IColumnEditorFactoryAdapter interface is synchronous, and since
+     * Note: since the IColumnEditorFactory interface is synchronous, and since
      * column info is fairly static, this method is thread-safe, and it will
      * not be called on the executor thread.
      * 
-     * @see IColumnEditorFactoryAdapter#getColumnEditorId(IPresentationContext, Object)
+     * @see IColumnEditorFactory#getColumnEditorId(IPresentationContext, Object)
      */
     public String getColumnPresentationId(IPresentationContext context, Object element) {
         return null;
diff --git a/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/IVMAdapter.java b/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/IVMAdapter.java
index 2d1c9dfaa05..85d5e3abadd 100644
--- a/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/IVMAdapter.java
+++ b/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/IVMAdapter.java
@@ -1,9 +1,9 @@
 package org.eclipse.dd.dsf.ui.viewmodel;
 
 import org.eclipse.dd.dsf.concurrent.ThreadSafe;
-import org.eclipse.debug.internal.ui.viewers.model.provisional.IColumnPresentationFactoryAdapter;
+import org.eclipse.debug.internal.ui.viewers.model.provisional.IColumnPresentationFactory;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementContentProvider;
-import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelProxyFactoryAdapter;
+import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelProxyFactory;
 
 /**
  * The View Model adapter handles the layout of a given data model within a 
@@ -14,6 +14,6 @@ import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelProxyFactor
 @ThreadSafe
 @SuppressWarnings("restriction")
 public interface IVMAdapter
-    extends IElementContentProvider, IModelProxyFactoryAdapter, IColumnPresentationFactoryAdapter 
+    extends IElementContentProvider, IModelProxyFactory, IColumnPresentationFactory 
 {
 }
diff --git a/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/IVMProvider.java b/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/IVMProvider.java
index c8bd7c4d542..8228dea5a4d 100644
--- a/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/IVMProvider.java
+++ b/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/IVMProvider.java
@@ -1,9 +1,9 @@
 package org.eclipse.dd.dsf.ui.viewmodel;
 
 import org.eclipse.dd.dsf.concurrent.ThreadSafe;
-import org.eclipse.debug.internal.ui.viewers.model.provisional.IColumnPresentationFactoryAdapter;
+import org.eclipse.debug.internal.ui.viewers.model.provisional.IColumnPresentationFactory;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementContentProvider;
-import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelProxyFactoryAdapter;
+import org.eclipse.debug.internal.ui.viewers.model.provisional.IModelProxyFactory;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationContext;
 
 /**
@@ -14,7 +14,7 @@ import org.eclipse.debug.internal.ui.viewers.model.provisional.IPresentationCont
 @ThreadSafe
 @SuppressWarnings("restriction")
 public interface IVMProvider 
-    extends IElementContentProvider, IModelProxyFactoryAdapter, IColumnPresentationFactoryAdapter 
+    extends IElementContentProvider, IModelProxyFactory, IColumnPresentationFactory 
 {
     /**
      * Returns the root layout node that is configured in this provider.  
diff --git a/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/dm/AbstractDMVMLayoutNode.java b/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/dm/AbstractDMVMLayoutNode.java
index df94f0e020c..c6fd3cfe9cb 100644
--- a/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/dm/AbstractDMVMLayoutNode.java
+++ b/plugins/org.eclipse.dd.dsf.ui/src/org/eclipse/dd/dsf/ui/viewmodel/dm/AbstractDMVMLayoutNode.java
@@ -16,10 +16,10 @@ import java.util.concurrent.RejectedExecutionException;
 
 import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
-import org.eclipse.dd.dsf.concurrent.RequestMonitor;
-import org.eclipse.dd.dsf.concurrent.DsfRunnable;
 import org.eclipse.dd.dsf.concurrent.DataRequestMonitor;
+import org.eclipse.dd.dsf.concurrent.DsfRunnable;
 import org.eclipse.dd.dsf.concurrent.Immutable;
+import org.eclipse.dd.dsf.concurrent.RequestMonitor;
 import org.eclipse.dd.dsf.datamodel.DMContexts;
 import org.eclipse.dd.dsf.datamodel.IDMContext;
 import org.eclipse.dd.dsf.datamodel.IDMData;
@@ -36,7 +36,7 @@ import org.eclipse.dd.dsf.ui.viewmodel.IVMLayoutNode;
 import org.eclipse.dd.dsf.ui.viewmodel.VMDelta;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenCountUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenUpdate;
-import org.eclipse.debug.internal.ui.viewers.model.provisional.IColumnPresentationFactoryAdapter;
+import org.eclipse.debug.internal.ui.viewers.model.provisional.IColumnPresentationFactory;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IElementLabelProvider;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.IHasChildrenUpdate;
 import org.eclipse.debug.internal.ui.viewers.model.provisional.ILabelUpdate;
@@ -345,7 +345,7 @@ abstract public class AbstractDMVMLayoutNode<V extends IDMData> extends Abstract
      * @param update Update object to fill information to
      * 
      * @see IElementLabelProvider
-     * @see IColumnPresentationFactoryAdapter
+     * @see IColumnPresentationFactory
      */
     protected void fillColumnLabel(@SuppressWarnings("unused") IDMContext<V> dmContext, @SuppressWarnings("unused") V dmData,
                                    @SuppressWarnings("unused") String columnId, int idx, ILabelUpdate update) {
diff --git a/plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/AbstractDMContext.java b/plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/AbstractDMContext.java
index 87656319219..a68690c9277 100644
--- a/plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/AbstractDMContext.java
+++ b/plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/AbstractDMContext.java
@@ -15,9 +15,17 @@ import org.eclipse.dd.dsf.concurrent.Immutable;
 import org.eclipse.dd.dsf.service.DsfSession;
 
 /**
- * Base implementation of the IDMContext interface.  Most functionality here 
- * is centered around comparing DMContexts, as this is a critical to make the 
- * views work correctly.
+ * Base implementation of the IDMContext interface.  There are two pieces of 
+ * functionality here: <br>
+ * 1) The {@link #getAdapter(Class)} implementation which retrieves model
+ * adapters registered with the session. <br>
+ * 2) Methods to help compare DM Contexts.  <br>
+ * <p>
+ * Note: The {@link #equals(Object)} and {@link #hashCode()} methods are 
+ * made abstract to force the deriving classes to provide a proper 
+ * implementation.  Data Model Context objects are meant to be used as handles, 
+ * therefore a proper equals implementation is critical. 
+ * </p>
  * @param <V> Data Model data type that this context is for.
  */
 @Immutable
@@ -117,4 +125,17 @@ abstract public class AbstractDMContext<V extends IDMData> extends PlatformObjec
         return retVal;
     }
 
+    /**
+     * Deriving classes must implement proper equals and hashCode operations 
+     * based on context data.
+     */
+    @Override
+    abstract public boolean equals(Object obj);
+    
+    /**
+     * Deriving classes must implement proper equals and hashCode operations 
+     * based on context data.
+     */
+    @Override
+    abstract public int hashCode();
 }
diff --git a/plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/ServiceDMContext.java b/plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/ServiceDMContext.java
index f8219488a31..89de05e027a 100644
--- a/plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/ServiceDMContext.java
+++ b/plugins/org.eclipse.dd.dsf/src/org/eclipse/dd/dsf/datamodel/ServiceDMContext.java
@@ -12,11 +12,9 @@ package org.eclipse.dd.dsf.datamodel;
 
 
 /**
- * The Data Model Context representing the owner service.  The service DM Context
+ * The Data Model Context representing the owner service, which is returned by 
+ * {@link IDMService#getServiceContext()} methods.  The service DM Context
  * should be the parent of all contexts originating from the given service.
- * <p>
- * Note: there should be only one instance of ServiceContext per service, so there
- * is no need to implement the equals() methods.
  */
 public class ServiceDMContext<V extends IDMService> extends AbstractDMContext<V> {
     String fServiceDMID;
@@ -29,4 +27,14 @@ public class ServiceDMContext<V extends IDMService> extends AbstractDMContext<V>
     @Override
     public String toString() { return baseToString() + fServiceDMID; }
 
+    @Override
+    public boolean equals(Object obj) { 
+        return obj instanceof ServiceDMContext<?> && fServiceDMID.equals(((ServiceDMContext<?>)obj).fServiceDMID); 
+    }
+    
+    @Override
+    public int hashCode() { 
+        return fServiceDMID.hashCode(); 
+    }
+
 }