<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
	<xsd:attributeGroup name="attrGroup">
		<xsd:attribute name="attrTest1"/>
		<xsd:attribute name="attrTest2"/>
	</xsd:attributeGroup>
	<xsd:attributeGroup name="attrGroup2">
		<xsd:attribute name="attrTest3"/>
		<xsd:attribute name="attrTest4"/>
	</xsd:attributeGroup>
	<xsd:complexType name="fooType">
		<xsd:anyAttribute namespace="##any"/>
		<xsd:attributeGroup ref="attrGroup"/>
		<xsd:attributeGroup ref="attrGroup2"/>
	</xsd:complexType>
</xsd:schema>