<?xml version="1.0" standalone="no"?>
<!DOCTYPE DOCUMENT [

  <!ELEMENT DOCUMENT ANY>
  <!ENTITY LOGO SYSTEM "http://www.ibiblio.org/xml/logo.gif"
     NDATA GIF>
  <!NOTATION GIF SYSTEM "image/gif">
  <!ELEMENT IMAGE EMPTY>
  <!ATTLIST IMAGE SOURCE ENTITY #REQUIRED>

]>
<DOCUMENT>
  <IMAGE SOURCE="LOGO" />
</DOCUMENT>
