<?xml version="1.0" encoding="UTF-8"?>
      <!-- Adapted from http://www.learn-xml-schema-tutorial.com/ -->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="Author">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="FirstName" type="xs:string" />
        <xs:element name="MiddleName" type="xs:string" minOccurs="0"/>
        <xs:element name="LastName" type="xs:string" />
      </xs:sequence>
    <xs:attribute name="id" type="xs:ID" use="optional" />
    </xs:complexType>
  </xs:element>
</xs:schema>
