<Octothorpe xmlns:A="uri:type:A" xmlns:C="uri:type:C">
  <colon/>
  <A:section_mark C:suspension_points="blah">
    <section_mark C:suspension_points="foo">
      baz
    </section_mark>
  </A:section_mark>
  <yada><foo z="baz"/></yada>
  <apostrophe><omg/><quxx woof="bark"/></apostrophe>
</Octothorpe>