maint-5-2/tapestry-core/src/test/app1/SelectZoneDemo.tml

<t:border xmlns:t="http://tapestry.apache.org/schema/tapestry_5_1_0.xsd">
	<p>Car Maker: ${carMaker}</p>
	<p>Car Model: ${carModel}</p>
	<t:form>
		<p>
			<t:errors />
		</p>
		<p>
			<t:select t:id="carMaker" validate="required"
				model="makeModel" zone="modelZone" encoder="makeEncoder" />
		</p>

		<t:zone t:id="modelZone">
			<t:if test="carMaker">
				<t:delegate to="modelBlock" />
			</t:if>
		</t:zone>

		<t:block id="modelBlock">
			<p id="carModelContainer">
				<t:select t:id="carModel" model="availableModels" validate="required" blankOption="always" />
			</p>
		</t:block>
		
		<p>
			<t:submit value="literal:Submit" />
		</p>
	</t:form>

</t:border>