<!-- XmlBase04.xml: override base URI, and revert following element -->
<doc xmlns:eg="http://id.example.org/namespace">
  <eg:inner xml:base="http://id.example.org/base1" eg:a2="a2">
    <eg:deeper xml:base="http://id.example.org/base2" eg:a3="a3">
       <eg:evendeeper />
    </eg:deeper>
    <eg:anotherdeeper />
  </eg:inner>
</doc>