<?xml version="1.0"?>
<?xml-stylesheet type="text/css" href="display.css"?>
<!DOCTYPE doc [
<!ATTLIST d id ID #IMPLIED>
]>
<doc>
  <foo xmlns="foobar">One</foo> <x:bar xmlns:x="barfoo">Two</x:bar>
  <d id="id3">Three</d>
</doc>