diff -u -r1.10 -r1.11
--- TrackerHit.aid	3 Aug 2006 16:53:35 -0000	1.10
+++ TrackerHit.aid	11 Oct 2006 13:27:29 -0000	1.11
@@ -11,7 +11,7 @@

 /** A generic tracker hit to be used by pattern recognition.
  * 
  * @author gaede

- * @version $Id: TrackerHit.aid,v 1.10 2006/08/03 16:53:35 gaede Exp $

+ * @version $Id: TrackerHit.aid,v 1.11 2006/10/11 13:27:29 gaede Exp $

  */
 
 public interface TrackerHit extends LCObject {

@@ -28,10 +28,11 @@

      */
     public const double3V getPosition() const ;
 

-    /**Covariance of the position (x,y,z)

+    /** Covariance of the position (x,y,z), stored as lower triangle matrix. i.e.
+     *  cov(x,x) , cov(y,x) , cov(y,y) , cov(z,x) , cov(z,y) , cov(z,z).

      */
     public const FloatVec& getCovMatrix() const ;

-

+    

     /** The dE/dx of the hit in [GeV].
      */ 	
     public float getdEdx() const ;