The reference may be resolved or not. If it is resolved, the referenced
MappedFeatureType is accessible, otherwise only the name of the type is available.
author: Markus Schneider author: last edited by: $Author: apoth $ version: $Revision: 9342 $, $Date: 2007-12-27 04:32:57 -0800 (Thu, 27 Dec 2007) $