<xs:attributeGroup name="BookingClassAvailabilityGroup">
    <xs:annotation>
        <xs:documentation xml:lang="en">Holds booking class and available seats quantity.</xs:documentation>
    </xs:annotation>
    <xs:attribute name="ResBookDesigCode" type="UpperCaseAlphaLength1to2" use="optional">
        <xs:annotation>
            <xs:documentation xml:lang="en">Reservation Booking Designator (RBD) code (e.g. Y).</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="ResBookDesigQuantity" type="NumericStringLength1to3" use="optional">
        <xs:annotation>
            <xs:documentation xml:lang="en">Seat quantity available for this Reservation Booking Designator (RBD).</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="ResBookDesigStatusCode" type="OTA_CodeType" use="optional">
        <xs:annotation>
            <xs:documentation xml:lang="en">Refer to OTA Code List Res Book Designator Status Code (RBD).  This provides the status (e.g. waitlist open, available, available by direct request to supplier only).</xs:documentation>
        </xs:annotation>
    </xs:attribute>
</xs:attributeGroup>