<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
	<xsd:simpleType name="myUnion">
		<xsd:union memberTypes="xsd:string xsd:integer"/>
	</xsd:simpleType>
	<xsd:simpleType name="fooType">
		<xsd:restriction base="myUnion"/>
	</xsd:simpleType>
</xsd:schema>