<ui:composition xmlns="http://www.w3.org/1999/xhtml"
    xmlns:ui="http://java.sun.com/jsf/facelets"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:c="http://java.sun.com/jstl/core"
    xmlns:s="http://jboss.com/products/seam/taglib">
    <s:link styleClass="columnHeader" value="#{propertyLabel} #{entityList.orderColumn == propertyPath ? (entityList.orderDirection == 'desc' ? messages.down : messages.up) : ''}">
        <f:param name="sort" value="#{propertyPath}"/>
        <f:param name="dir" value="#{entityList.orderColumn == propertyPath and entityList.orderDirection == 'asc' ? 'desc' : 'asc'}"/>
    </s:link>
</ui:composition>