<?xml version=“1.0”?> <xs:schema xmlns:xs=“www.w3.org/2001/XMLSchema”>

<xs:complexType name="personName">
  <xs:sequence>
    <xs:element name="title" minOccurs="0"/>
    <xs:element name="forename" minOccurs="0" maxOccurs="unbounded"/>
    <xs:element name="surname"/>
  </xs:sequence>
</xs:complexType>
<xs:complexType name="simpleName">
  <xs:complexContent>
    <xs:restriction base="personName">
      <xs:sequence>
        <xs:element name="forename" minOccurs="1" maxOccurs="1"/>
        <xs:element name="surname"/>
      </xs:sequence>
    </xs:restriction>
  </xs:complexContent>
</xs:complexType>
<xs:element name="who" type="simpleName"/>

</xs:schema>