<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="library">
<xs:complexType>
<xs:sequence>
<xs:element name="book" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="isbn" type="xs:integer"/>
<xs:element name="title">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="xs:string">
<xs:attribute name="lang" type="xs:language"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name="author" minOccurs="0" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="name" type="xs:string"/>
<xs:element name="born" type="xs:date"/>
<xs:element name="dead" type="xs:date"/>
</xs:sequence>
<xs:attribute name="id" type="xs:ID"/>
</xs:complexType>
</xs:element>
<xs:element name="character" minOccurs="0" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="name" type="xs:string"/>
<xs:element name="born" type="xs:date"/>
<xs:element name="qualification" type="xs:string"/>
</xs:sequence>
<xs:attribute name="id" type="xs:ID"/>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="id" type="xs:ID"/>
<xs:attribute name="available" type="xs:boolean"/>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>