In order for a page fragment to use the functionality provided by any tag library, you must begin the page with a reference to the tag library or libraries you want to use.
For example:
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jstl/fmt" %>
<%@ taglib prefix="portlet" uri="http://java.sun.com/portlet" %>
<%@ taglib prefix="dspel"
uri="http://www.atg.com/taglibs/daf/dspjspELTaglib1_0 %>
<%@ taglib prefix="dsp"
uri="http://www.atg.com/taglibs/daf/dspjspTaglib1_0" %>
<%@ taglib prefix="paf"
uri="http://www.atg.com/taglibs/portal/pafTaglib1_3" %>
In most cases you will at least need the declarations for the pafTaglib shown above.
