1<?xml version="1.0"?>
2<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
3  <xs:complexType name="personName">
4    <xs:sequence>
5      <xs:element name="title" minOccurs="0"/>
6      <xs:element name="forename" minOccurs="0" maxOccurs="unbounded"/>
7      <xs:element name="surname"/>
8    </xs:sequence>
9  </xs:complexType>
10  <xs:complexType name="extendedName">
11    <xs:complexContent>
12      <xs:extension base="personName">
13        <xs:sequence>
14          <xs:element name="generation" minOccurs="0"/>
15        </xs:sequence>
16      </xs:extension>
17    </xs:complexContent>
18  </xs:complexType>
19  <xs:element name="addressee" type="extendedName"/>
20</xs:schema>
21