<html t:type="Border" xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd">

    <p id="false">
        <t:unless test="false">
            false is rendered
        </t:unless>
    </p>

    <p id="true">
        <t:unless test="true">true is not rendered</t:unless>
    </p>
</html>