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="simpleName">
11    <xs:complexContent>
12      <xs:restriction base="personName">
13        <xs:sequence>
14          <xs:element name="forename" minOccurs="1" maxOccurs="1"/>
15          <xs:element name="surname"/>
16        </xs:sequence>
17      </xs:restriction>
18    </xs:complexContent>
19  </xs:complexType>
20  <xs:element name="who" type="simpleName"/>
21</xs:schema>
22