--- a/gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/services/requestobjects/Layer.java	Tue Apr 13 08:50:08 2010 +0000
+++ b/gnv-artifacts/src/main/java/de/intevation/gnv/artifacts/services/requestobjects/Layer.java	Tue Apr 13 12:32:24 2010 +0000
@@ -17,25 +17,27 @@
 public interface Layer {
 
     /**
-     *
+     * Returns the name of this layer.
      * @return the name of this layer.
      */
     String getName();
 
     /**
-     *
+     * Returns the id of this layer.
      * @return the id of this layer.
      */
     String getID();
 
     /**
-     *
+     * Returns true if the Layer is an GroupLayer
      * @return true, if this layer is a group layer - otherwise false.
      */
     boolean isGroupLayer();
 
     /**
-     *
+     * Returned the ID of the Parent Layer.
+     * Only if the Layer is a Child-Layer.
+     * If this Layer is an Root-Layer null will be returned.
      * @return the id of the parent.
      */
     String parentID();