<xs:element name="AdvReservation" minOccurs="0">
    <xs:annotation>
        <xs:documentation xml:lang="en">Specifies constraints on when advance reservations can be made.</xs:documentation>
    </xs:annotation>
    <xs:complexType>
        <xs:attribute name="LatestTimeOfDay" type="TimeOrDateTimeType" use="optional">
            <xs:annotation>
                <xs:documentation xml:lang="en">The time of day by which reservations must be made on the last day that advance reservations can be made.</xs:documentation>
            </xs:annotation>
        </xs:attribute>
        <xs:attribute name="LatestPeriod" type="NumericStringLength1to3" use="optional">
            <xs:annotation>
                <xs:documentation xml:lang="en">The amount of elapsed time or number of occurrences of a day of the week before departure needed to satisfy an advance reservation requirement.</xs:documentation>
            </xs:annotation>
        </xs:attribute>
        <xs:attribute name="LatestUnit" type="StayUnitType" use="optional">
            <xs:annotation>
                <xs:documentation xml:lang="en">The unit of elapsed time or the day of the week to be applied to the LatestPeriod value.</xs:documentation>
            </xs:annotation>
        </xs:attribute>
    </xs:complexType>
</xs:element>