<?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" 
           elementFormDefault="qualified" 
           xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="bookstore">
    <xs:complexType>
      <xs:sequence>
        <xs:element maxOccurs="unbounded" name="book">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="title" type="xs:string" />
              <xs:element name="author">
                <xs:complexType>
                  <xs:sequence>
                    <xs:element minOccurs="0" name="name" 
                                type="xs:string" />
                    <xs:element minOccurs="0" name="first-name" 
                                type="xs:string" />
                    <xs:element minOccurs="0" name="last-name" 
                                type="xs:string" />
                  </xs:sequence>
                </xs:complexType>
              </xs:element>
              <xs:element name="price" type="xs:decimal" />
            </xs:sequence>
            <xs:attribute name="genre" type="xs:string" use="required"/>
            <xs:attribute name="publicationdate" type="xs:unsignedShort"
                                use="required" />
            <xs:attribute name="ISBN" type="xs:string" use="required" />
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>