XML Schema:
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns="http://www.cs.rpi.edu/addressBook"
targetNamespace="http://www.cs.rpi.edu/addressBook"
elementFormDefault="qualified"
attributeFormDefault="unqualified">
<xsd:complexType name="record">
<xsd:sequence>
<xsd:element name="cname" type="xsd:string"/>
<xsd:element name="email" type="xsd:string/>
</xsd:sequence>
</xsd:complexType>
<xsd:element name="addressBook">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="owner" type="record"/>
<xsd:element name="person" type="record"
minOccurs="0" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:schema>