diff -N IDetectorElementMixin.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ IDetectorElementMixin.java	6 May 2007 07:19:08 -0000	1.1
@@ -0,0 +1,17 @@

+package org.lcsim.detector;
+
+/**
+ * Mixin interface for assigning an {@link IDetectorElement} to an object.
+ */
+public interface IDetectorElementMixin
+{
+    /**
+      * Get the {@link IDetectorElement} associated to this object.
+      */
+    public IDetectorElement getDetectorElement();
+
+    /**
+      * Set the {@link IDetectorElement} associated to this object.
+      */
+    public void setDetectorElement(IDetectorElement de);
+}

diff -u -r1.2 -r1.3
--- IIdentifiable.java	3 May 2007 21:48:25 -0000	1.2
+++ IIdentifiable.java	6 May 2007 07:19:09 -0000	1.3
@@ -3,5 +3,6 @@

 public interface IIdentifiable 
 {
     public IIdentifier getIdentifier();

+    public IExpandedIdentifier getExpandedIdentifier();

     public IIdentifierHelper getIdentifierHelper();
 }

diff -u -r1.3 -r1.4
--- IdentifierHelper.java	4 May 2007 10:23:38 -0000	1.3
+++ IdentifierHelper.java	6 May 2007 07:19:09 -0000	1.4
@@ -11,7 +11,7 @@

  * @see IdentifierUtil
  *
  * @author Jeremy McCormick

- * @version $Id: IdentifierHelper.java,v 1.3 2007/05/04 10:23:38 jeremy Exp $

+ * @version $Id: IdentifierHelper.java,v 1.4 2007/05/06 07:19:09 jeremy Exp $

  */
 
 public class IdentifierHelper

@@ -28,7 +28,7 @@

     {
         return iddict;
     }

-    

+

     public IIdentifier pack( IExpandedIdentifier id )
     {        
         return IdentifierUtil.pack(id, getIdentifierDictionary() );            

@@ -37,5 +37,5 @@

     public IExpandedIdentifier unpack( IIdentifier id )
     {
         return IdentifierUtil.unpack( id, iddict );

-    }           

+    }

 }