<content name=foo> ${foohdr} ${foobody} </content>
<content name=foohdr>
        This is the header. REQ2
        Title: $[title]
</content>
<content name=foobody>
        <{set title="The title: REQ1"}>
        This is the content. REQ3
</content>
<out file=log/deferred_refs.html>${foo}</out>