Something

			<route name="directory" pattern="^/directory" module="Directory">
			        <route name=".index" pattern="^(/)?$" action="Index" />
			        <route name=".country" pattern="^/(iso_id:[a-z]+)">
			                <route name=".view" pattern="^$" action="Country" />
			                <route name=".city" pattern="^/(city:\S+)">
			                        <route name=".view" pattern="^$" action="City" />
			                        <route name=".location" pattern="^/(location:[A-Za-z_0-9]+)$" action="Location" />
			                </route>
			        </route>
			</route>