<xs:element name="Request">
    <xs:complexType>
        <xs:sequence>
            <xs:element name="Action" type="xs:token" />
            <xs:element name="ActionTime" minOccurs="0">
                <xs:simpleType>
                    <xs:union memberTypes="xs:dateTime xs:date" />
                </xs:simpleType>
            </xs:element>
            <xs:choice>
                <xs:element ref="VoterRegistration" minOccurs="0" maxOccurs="unbounded" />
                <xs:element ref="Candidate" minOccurs="0" maxOccurs="unbounded" />
            </xs:choice>
            <xs:any namespace="##other" minOccurs="0" maxOccurs="unbounded" />
        </xs:sequence>
    </xs:complexType>
</xs:element>