<?xml version="1.0" encoding="UTF-8"?>
<!-- $Header: /home/cvsroot/w3c-xml-schema/user/examples/first-user-dt.xsd,v 1.1 2001/11/01 12:27:47 vdv Exp $ -->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:simpleType name="string255">
<xs:restriction base="xs:token">
<xs:maxLength value="255"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="string32">
<xs:restriction base="xs:token">
<xs:maxLength value="32"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="isbn">
<xs:restriction base="xs:unsignedLong">
<xs:totalDigits value="10"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType name="supportedLanguages">
<xs:restriction base="xs:language">
<xs:enumeration value="en"/>
<xs:enumeration value="es"/>
</xs:restriction>
</xs:simpleType>
<xs:element name="name" type="string32"/>
<xs:element name="qualification" type="string255"/>
<xs:element name="born" type="xs:date"/>
<xs:element name="dead" type="xs:date"/>
<xs:element name="isbn" type="isbn"/>
<xs:attribute name="id" type="xs:ID"/>
<xs:attribute name="available" type="xs:boolean"/>
<xs:attribute name="lang" type="supportedLanguages"/>
<xs:element name="title">
<xs:complexType>
<xs:simpleContent>
<xs:extension base="string255">
<xs:attribute ref="lang"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
<xs:element name="library">
<xs:complexType>
<xs:sequence>
<xs:element ref="book" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="author">
<xs:complexType>
<xs:sequence>
<xs:element ref="name"/>
<xs:element ref="born"/>
<xs:element ref="dead" minOccurs="0"/>
</xs:sequence>
<xs:attribute ref="id"/>
</xs:complexType>
</xs:element>
<xs:element name="book">
<xs:complexType>
<xs:sequence>
<xs:element ref="isbn"/>
<xs:element ref="title"/>
<xs:element ref="author" minOccurs="0" maxOccurs="unbounded"/>
<xs:element ref="character" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute ref="id"/>
<xs:attribute ref="available"/>
</xs:complexType>
</xs:element>
<xs:element name="character">
<xs:complexType>
<xs:sequence>
<xs:element ref="name"/>
<xs:element ref="born"/>
<xs:element ref="qualification"/>
</xs:sequence>
<xs:attribute ref="id"/>
</xs:complexType>
</xs:element>
</xs:schema>