Bug 149922 Image builder - URI and file source type are treated as same
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
resourceKey( obj, ExtendedItem.ALT_TEXT_KEY_PROP,
				ExtendedItem.ALT_TEXT_PROP );
		
		
		ExtensionElementDefn extDefn = obj.getExtDefn( );
		if ( extDefn != null )
		{
			
			List list = extDefn.getLocalProperties( );
			for ( int i = 0; i < list.size( ); i++ )
			{
				PropertyDefn prop = (PropertyDefn) list.get( i );
				if ( ExtendedItem.EXTENSION_NAME_PROP.equals( prop.getName( ) ) )
					continue;
				
				
				
				
				
				if ( prop.getTypeCode( ) != PropertyType.XML_TYPE )
					writeProperty( obj, getTagByPropertyType( prop ), prop
							.getName( ), false );
				else
					writeProperty( obj, getTagByPropertyType( prop ), prop
							.getName( ), true );
			}
		}
		
		writeStructureList( obj, ExtendedItem.FILTER_PROP );