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  %xx;
7  ]>
8  <test>This sample shows a &tricky; method.</test>