<xs:element name="Clubs">
        <xs:unique name="UniqueClubKey">
            <xs:selector xpath="Club" />
            <xs:field xpath="@id" />
        </xs:unique>
    <xs:complexType>
      <xs:sequence>
        <xs:element name="Name" minOccurs="0" maxOccurs="unbounded" type="xs:string" />
        <xs:element name="City" minOccurs="0" maxOccurs="unbounded" type="xs:string" />
        <xs:element name="County" minOccurs="0" maxOccurs="unbounded" type="County" />
      </xs:sequence>
    </xs:complexType>
  </xs:element>