<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
	<xs:element name="root">
		<xs:complexType>
			<xs:sequence>
				<xs:element ref="t" maxOccurs="unbounded"/>
			</xs:sequence>
		</xs:complexType>
		<xs:key id="foo" name="tableu">
			<xs:selector xpath=".//t"/>
			<xs:field xpath="."/>
		</xs:key>
	</xs:element>
	<xs:element name="t" type="xs:string"/>
</xs:schema>