name: footnote
<a class="footnote" tal:attributes="href string:#${self/id}"><sup class="footnotemark" tal:content="self/mark/attributes/num">&#8224;</sup></a>

name: footnotemark
<a class="footnote" href="#footnotes"><sup class="footnotemark" tal:content="self/mark/attributes/num">&#8224;</sup></a>

name: footnotetext
