http://www.abisource.com/lxr/source/abi/test/wp/footer.abw
Or, for the simplest possible such document, here's a snippet.
-- snip --
<abiword>
<section footer="ftr01">
<p>This document has a footer. Edit it to add more content.</p>
</section>
<section id="ftr01" type="footer">
<p props="text-align:center"> Page <field type="page_number"/> of <field
type="page_count"/> </p>
</section>
</abiword>
-- snip --
Hope that helps.
Paul