diff -u -r1.18 -r1.19
--- DetectorElement.java	2 May 2007 23:45:34 -0000	1.18
+++ DetectorElement.java	3 May 2007 21:48:25 -0000	1.19
@@ -371,13 +371,18 @@

     {
         this.helper = helper;
     }

+
+    public IIdentifierHelper getIdentifierHelper()
+    {
+        return helper;
+    }

-    public void traversePreOrder(IDetectorElementVisitor visitor)

+    public void traverseDescendantsPreOrder(IDetectorElementVisitor visitor)

     {
         traversePreOrder(this,visitor);
     }
     

-    public void traversePostOrder(IDetectorElementVisitor visitor)

+    public void traverseDescendantsPostOrder(IDetectorElementVisitor visitor)

     {
         traversePostOrder(this,visitor);
     }

@@ -426,13 +431,13 @@

         }
     }
     

-    private class AncestorSearch<T extends IDetectorElement>

+    private class TypeSearch<T extends IDetectorElement>

     implements IDetectorElementVisitor
     {
         Class<T> klass;
         List<T> results = new ArrayList<T>();
         

-        AncestorSearch(Class<T> klass)

+        TypeSearch(Class<T> klass)

         {
             this.klass = klass;
         }

@@ -453,8 +458,15 @@

     
     public <T extends IDetectorElement> List<T> getAncestors(Class<T> klass)
     {

-        AncestorSearch<T> search = new AncestorSearch<T>( klass );

+        TypeSearch<T> search = new TypeSearch<T>( klass );

         traverseAncestors( search );
         return search.getResult();
     }    

-}

\ No newline at end of file

+    
+    public <T extends IDetectorElement> List<T> getDescendants(Class<T> klass)
+    {
+        TypeSearch<T> search = new TypeSearch<T>( klass );
+        traverseDescendantsPreOrder( search );
+        return search.getResult();
+    }
+}

diff -u -r1.14 -r1.15
--- IDetectorElement.java	2 May 2007 23:45:34 -0000	1.14
+++ IDetectorElement.java	3 May 2007 21:48:25 -0000	1.15
@@ -27,7 +27,7 @@

  * 
  * @author Tim Nelson
  * @author Jeremy McCormick

- * @version $Id: IDetectorElement.java,v 1.14 2007/05/02 23:45:34 jeremy Exp $

+ * @version $Id: IDetectorElement.java,v 1.15 2007/05/03 21:48:25 jeremy Exp $

  */
 public interface IDetectorElement 
 extends IIdentifiable, INamed

@@ -192,14 +192,14 @@

      * 
      * @param visitor
      */

-    public void traversePreOrder(IDetectorElementVisitor visitor);

+    public void traverseDescendantsPreOrder(IDetectorElementVisitor visitor);

  
     /**
      * Post-order tree traversal of this and children.
      * 
      * @param visitor
      */

-    public void traversePostOrder(IDetectorElementVisitor visitor);    

+    public void traverseDescendantsPostOrder(IDetectorElementVisitor visitor);    

     
     /**
      * Visit this and ancestors.

@@ -209,9 +209,19 @@

     public void traverseAncestors(IDetectorElementVisitor visitor);
     
     /**

-     * Find first ancestor with class of {@param klass}.

+     * Find ancestors with class matching {@param klass}.

      * 
      * @param klass Class to match.
      */
     public <T extends IDetectorElement> List<T> getAncestors(Class<T> klass);

-}

\ No newline at end of file

+    
+    /**
+     * Find descendants with class matching {@param klass}.
+     * 
+     * @param <T>
+     * @param klass
+     * @return
+     */
+    public <T extends IDetectorElement> List<T> getDescendants(Class<T> klass);
+    
+}

diff -u -r1.1 -r1.2
--- IExpandedIdentifier.java	2 May 2007 01:58:19 -0000	1.1
+++ IExpandedIdentifier.java	3 May 2007 21:48:25 -0000	1.2
@@ -6,7 +6,7 @@

  * COMMENT
  *
  * @author Jeremy McCormick

- * @version $Id: IExpandedIdentifier.java,v 1.1 2007/05/02 01:58:19 jeremy Exp $

+ * @version $Id: IExpandedIdentifier.java,v 1.2 2007/05/03 21:48:25 jeremy Exp $

  */
 
 public interface IExpandedIdentifier

@@ -18,4 +18,7 @@

     public void clear();
     public boolean isValid();
     public boolean equals(IExpandedIdentifier id);

+        
+    // compare only matching prefix fields
+    //public int match(IExpandedIdentifier id); 

 }

diff -u -r1.1 -r1.2
--- IIdentifiable.java	28 Feb 2007 21:52:00 -0000	1.1
+++ IIdentifiable.java	3 May 2007 21:48:25 -0000	1.2
@@ -3,6 +3,5 @@

 public interface IIdentifiable 
 {
     public IIdentifier getIdentifier();

-    //IdentifierHash identifyHash();
-    //IIdHelper getHelper();

+    public IIdentifierHelper getIdentifierHelper();

 }