     import flash.events.Event;
 
    /**
-    *  
+    *  Base class for some Spark filters.
+    * 
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5

        }
        
       /**
        *  
        *  @langversion 3.0
        *  @playerversion Flash 10
        *  @playerversion AIR 1.5

        public static const CHANGE:String = "change";       
        
       /**
        *  Constructor.
        * 
        *  @param target The target to which the filter is applied.
        * 
        *  @langversion 3.0
        *  @playerversion Flash 10
        *  @playerversion AIR 1.5
