Add “<%@ taglib uri=”/WEB-INF/tld/portal.tld” prefix=”portal” %>” in order to access the portal theme tags like “<portal-logic/>” and “<portal-navigation/>“.
To call the tag function, simply call <portal:<function name>/>. For example in portal theme, we would call:
<portal-logic:if loggedIn="yes">...</portal-logic:if>
to
<portal:if loggedIn="yes">...</portal:if>