plugins/org.eclipse.epsilon.flexmi/models/sample.xml

<?xml version="1.0"?>
<?nsuri http://www.eclipse.org/emf/2002/Ecore?>
<package name="foo" uri="foo" prefix="">
	
	<class name="Flowchart">
		<ref name="nodes" type="Node" upper="-1" containment="true"/>
	</class>
	
	<class name="Node">
		<attr name="label" type="String"/> 
		<ref name="outgoing" type="Transition" opposite="source" upper="-1"/>
	</class>
	
	<class name="Transition">
		<ref name="source" type="Node" opposite="outgoing"/>
	</class>
	
	<datatype name="String" instanceType="java.lang.String"/>
	
</package>