<log4j:event logger="org.apache.log4j.xml.XMLLayoutTestCase" timestamp="XXX" level="DEBUG" thread="main">
<log4j:message><![CDATA[Hello]]></log4j:message>
<log4j:properties>
<log4j:data name="&lt;blahKey value='blah'/&gt;" value="blahValue"/>
<log4j:data name="blahAttribute" value="&lt;blah value='blah'&gt;"/>
</log4j:properties>
</log4j:event>