org.eclipse.ua.tests/cheatsheets/tests/parser/ActionElement_ExtraAttr.xml

<?xml version="1.0" encoding="UTF-8" ?> 
<cheatsheet title="Test cheatsheet without cheatsheet element">

	<intro>
		<description>
Simple test
		</description>
</intro>

	<item
		title="Just a simple test">
		<description>
Did it work? Of course not, it is suppose to cause a parsing error.
		</description>
		<action
			extra="testing"
			pluginId="org.eclipse.ui.tests.cheatsheets"
			class="org.eclipse.ui.tests.cheatsheets.actions.NoopAction"/>
</item>

</cheatsheet>