<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE Envelope [
  <!ENTITY dsig 'http://www.w3.org/2000/09/xmldsig#'>
  <!ENTITY c14n 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315'>
  <!ENTITY xpath 'http://www.w3.org/TR/1999/REC-xpath-19991116'>
  <!ENTITY xslt 'http://www.w3.org/TR/1999/REC-xslt-19991116'>
  <!ATTLIST Notaries Id ID #IMPLIED>
]>
<!-- 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 -->