<?xml version="1.0" encoding="UTF-8"?>
<!-- Preamble -->
<Envelope xmlns:foo="http://example.org/foo" xmlns="http://example.org/usps">
  <DearSir>foo</DearSir>
  <Body>bar</Body>
  <YoursSincerely>
  </YoursSincerely>
  <PostScript>bar</PostScript>
  <Notaries xmlns="" Id="notaries">
    <Notary name="Great, A. T." />
    <Notary name="Hun, A. T." />
  </Notaries>
  <!-- Commentary -->
</Envelope>
<!-- Postamble -->
