<?xml version="1.0"?>
<!DOCTYPE root [
  <!ELEMENT root (#PCDATA)>
  <!-- comment -->
  <?target PI data?>
  <!NOTATION JPEG SYSTEM "image/jpeg">
  <!ATTLIST  root source ENTITY #REQUIRED>
  <!ENTITY picture SYSTEM "picture.jpg" NDATA JPEG>  
]>
<root source="picture">
  This document is intended to test the building of
  various constructs in the internal DTD subset.
</root>
