xml2

下载来的一个看图软件的源代码

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