IllegalEntry1.xml

<?xml version="1.0" encoding="utf8" standalone="no"?>
<!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">

<!-- 'entry1' is illegal as per the dtd -->

<properties>
<comment>comment1</comment>

<entry key="firstkey">value of the first key</entry>
<entry1 key="secondkey">value of the second key</entry1>
</properties>