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666 CUSTOM TAGS IN JSP PAGES The template uses a set of nested tags—definition, screen, and parameter— to define a table of screen definitions and uses an insert tag to insert parameters from a screen definition into a specific application screen. JSP Page The template for the Duke’s Bookstore example, template.jsp, is shown below. This page includes a JSP page that creates the screen definition and then uses the insert tag to insert parameters from the definition into the application screen. <%@ taglib uri="/tutorial-template.tld" prefix="tt" %> <%@ page errorPage="errorpage.jsp" %> <%@ include file="screendefinitions.jsp" %><html> <head> <title> <tt:insert definition="bookstore" parameter="title"/> </title> </head> <tt:insert definition="bookstore" parameter="banner"/> <tt:insert definition="bookstore" parameter="body"/> </body> </html> screendefinitions.jsp selectedScreen: creates a screen definition based on a request attribute <tt:definition name="bookstore" screen="<%= (String)request. getAttribute(\"selectedScreen\") %>"> <tt:screen id="/enter"> <tt:parameter name="title" value="Duke’s Bookstore" direct="true"/> <tt:parameter name="banner" value="/banner.jsp" direct="false"/> <tt:parameter name="body" value="/bookstore.jsp" direct="false"/> </tt:screen> <tt:screen id="/catalog"> <tt:parameter name="title"
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