<?xml version="1.0" encoding="UTF-8"?>
<doctype>
  <element>
    <name>x:foo</name>
    <sequence/>
  </element>
  <attlist>
    <name>x:foo</name>
    <attribute>
      <name>xmlns:x</name>
      <cdata/>
      <default>http://www.example.com</default>
    </attribute>
  </attlist>
</doctype>
