Problem including another XHTML page in an XHTML page - jsf

Question

I am a beginner programming Java and I am doing a project using primefaces. I want to include another XHTML page in an XHTML page. The include page is in /WEB-INF/facelets/include.xhtml (It has some data from a Managed Bean)
In my "page.xhtml", at first, I put this line inside <ui:define name="content">:
<ui:include src="WEB-INF/facelets/include.xhtml" />
But, it does not work.
Later, I tried to do this inside <ui:define name="content">
<ui:include src="WEB-INF/facelets/include.xhtml">
<ui:param name="fullName" value="#{identityInformationBean.fullName}" />
</ui:include>
And in the "include.xhtml":
<h:outputText
rendered="#{fullName!=null}"
value="#{fullName}" />
But, it does not work too. Nevertheless, if I do this:
On "page.xhtml"
<ui:include src="WEB-INF/facelets/include.xhtml">
<ui:param name="fullName" value="Helen" />
</ui:include>
The "include.xhtml" receives the information correctly.
I'd tried to registering the include file as a tagfile, as suggest here How to include another XHTML in XHTML using JSF 2.0 Facelets?
But, it does not work.
Any idea to solve this problem? Thanks!
This is a piece of code from "include.xhtml":
<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:c="http://java.sun.com/jstl/core"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui">
<h:outputText
rendered="#{identityInformationBean.fullName!=null}"
value="#{identityInformationBean.fullName}" />
</ui:composition>
This is a piece of code from "page.xhtml":
<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:c="http://java.sun.com/jstl/core"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui" template="templates/generaltemplate.xhtml">
<ui:define name="content">
<h2>
<h:outputText value="Identity Information"/>
</h2>
</ui:define>
</ui:composition>

Answer 1

I'm not sure why you need ui:param. Think of the include file as just saving you the trouble of typing that included code into all the pages that might use it. You don't need to pass it a parameter.
What about using a single line of code: <ui:include src="WEB-INF/facelets/include.xhtml"/> And the include file would have <h:outputText value="#{identityInformationBean.fullName}"/>