1<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="reference" 2 xmlns="reference" elementFormDefault="qualified"> 3 <xs:attribute name="name" type="xs:string"/> 4 <xs:element name="class"> 5 <xs:complexType> 6 <xs:sequence> 7 <xs:element name="student" type="xs:string" maxOccurs="unbounded"/> 8 </xs:sequence> 9 <xs:attribute ref="name"/> 10 </xs:complexType> 11 </xs:element> 12</xs:schema>