diff -u -r1.8.2.2 -r1.8.2.3
--- Subdetector.java	28 Sep 2005 05:44:15 -0000	1.8.2.2
+++ Subdetector.java	28 Oct 2005 00:16:51 -0000	1.8.2.3
@@ -10,6 +10,7 @@

 {
     String getName();
     IDDecoder getIDDecoder();

+    Layering getLayering();

         
     boolean isTracker();
     boolean isCalorimeter();

@@ -17,4 +18,4 @@

     boolean isEndcap();
     
     double[] transformLocalToGlobal(double[] localPos);

-}

\ No newline at end of file

+}

diff -u -r1.8.2.1 -r1.8.2.2
--- Subdetector.java	28 Sep 2005 05:44:16 -0000	1.8.2.1
+++ Subdetector.java	28 Oct 2005 00:16:52 -0000	1.8.2.2
@@ -6,6 +6,7 @@

 import org.lcsim.geometry.layer.Layering;
 import org.lcsim.geometry.IDDecoder;
 import org.lcsim.geometry.SubdetectorIDDecoder;

+import org.lcsim.geometry.layer.Layering;

 
 /**
  *

@@ -105,4 +106,9 @@

     {
         return reflect;
     }

-}

\ No newline at end of file

+
+    public Layering getLayering()
+    {
+        throw new RuntimeException("layers not implemented");	
+    }
+}

diff -u -r1.1.2.1 -r1.1.2.2
--- AbstractSubdetector.java	28 Sep 2005 05:44:18 -0000	1.1.2.1
+++ AbstractSubdetector.java	28 Oct 2005 00:16:52 -0000	1.1.2.2
@@ -14,13 +14,14 @@

 import org.jdom.JDOMException;
 import org.lcsim.geometry.HepRepProvider;
 import org.lcsim.geometry.SubdetectorIDDecoder;

+import org.lcsim.geometry.layer.Layering;

 
 /**
  *
  * @author jeremym
  *

- * This class is supposed to simplify inheritance hierarchy for org.lcsim.geometry.subdetector
- * implementation classes, which extend it.

+ * This class is meant to simplify inheritance hierarchy for org.lcsim.geometry.subdetector
+ * implementation classes that extend it.

  *
  */
 abstract class AbstractSubdetector

@@ -42,4 +43,6 @@

     /** FIXME: Should live in org.lcsim.geometry.heprep or equivalent. */
     public void appendHepRep(HepRepFactory factory, HepRep heprep)
     {}

-}

\ No newline at end of file

+
+    abstract public Layering getLayering();
+}