<?xml version="1.0" encoding="UTF-8"?>
<doctype>
  <param name="e1">&lt;!ELEMENT doc </param>
  <param name="e2">EMPTY&gt;</param>
  <param name="e3">%e1; %e2;</param>
  <element>
    <name>doc</name>
    <sequence/>
  </element>
</doctype>
