A frame layout holds a source URI. The URI can be changed dynamically through
events. The URI may contain any URI that can be resolved by the Cocoon
org.apache.cocoon.environment.SourceResolver .
author: Carsten Ziegeler author: Volker Schmitt version: CVS $Id: FrameLayout.java 433543 2006-08-22 06:22:54Z crossley $