>
                </xs:simpleType>

                <xs:simpleType name="plate-number">
                    <xs:restriction base="dmv:requiredNonEmptyString">
                        <xs:pattern value="([A-Z]|[a-z]|[1-9]){1,7}"/>
                    </xs:restriction>
                </xs:simpleType>

                <xs:simpleType name="vin">
                    <xs:restriction base="dmv:requiredNonEmptyString">
                        <xs:pattern value="([A-Z]|[a-z]|[0-9]){1,17}"/>
                    </xs