1  <?xml version="1.0"?>
2  <!DOCTYPE test [
3  <!ELEMENT test (#PCDATA)>
4  <!ENTITY % xx "&#37;zz;">
5  <!ENTITY % zz '&#60;!ENTITY tricky "error-prone" >'>
6  <!ENTITY tricky "error-prone">
7  ]>
8  <test>This sample shows a &tricky; method.</test>