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 error-prone method.</test>
9