<%@ taglib uri="/WEB-INF/struts-tiles.tld" prefix="tiles" %> <%-- This file contains definition declarations. These definitions can be used in any jsp page by including this file with : <%@ include file="filename.jsp" %> Each definition declaration create a bean stored in specified jsp context. Default jsp context is 'page', so we need to specify a more useful context. --%> <%-- Master layout definition --%> <%-- portal definition --%> <%-- Add as many definition as you need ... --%>