<xs:element name="OTA_AirAvailRQ">
    <xs:annotation>
        <xs:documentation xml:lang="en">
The Availability Request message requests Flight Availability for a city pair on a specific date for a specific number and type of passengers. Optional request information can include:
- Time / Time Window
- Connecting cities.
- Client Preferences (airlines, cabin, flight types etc.)
The request can be narrowed to request availability for a specific airline, specific flight, or specific booking class on a specific flight.
The availability request message contains similar information to a standard Airline CRS or GDS availability request message.
</xs:documentation>
    </xs:annotation>
    <xs:complexType>
        <xs:sequence>
            <xs:element name="POS" type="POS_Type">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Point of sale object. </xs:documentation>
                </xs:annotation>
            </xs:element>
            <xs:element name="ProcessingInfo" minOccurs="0">
                <xs:annotation>
                    <xs:documentation xml:lang="en">A collection of information that specifies how the message processing should occur or how the data should be returned.</xs:documentation>
                </xs:annotation>
                <xs:complexType>
                    <xs:attributeGroup ref="AirProcessingInfoGroup" />
                </xs:complexType>
            </xs:element>
            <xs:element name="OriginDestinationInformation" maxOccurs="5">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Information on the locations between which availability is to be checked.</xs:documentation>
                </xs:annotation>
                <xs:complexType>
                    <xs:complexContent>
                        <xs:extension base="OriginDestinationInformationType">
                            <xs:sequence>
                                <xs:element name="SpecificFlightInfo" type="SpecificFlightInfoType" minOccurs="0">
                                    <xs:annotation>
                                        <xs:documentation xml:lang="en">To specify a flight for this origin and destination for which availability is to be checked.</xs:documentation>
                                    </xs:annotation>
                                </xs:element>
                                <xs:element name="TravelPreferences" type="AirSearchPrefsType" minOccurs="0">
                                    <xs:annotation>
                                        <xs:documentation xml:lang="en">Traveler preference information for this particular origin and destination.</xs:documentation>
                                    </xs:annotation>
                                </xs:element>
                            </xs:sequence>
                            <xs:attribute name="SameAirportInd" type="xs:boolean" use="optional">
                                <xs:annotation>
                                    <xs:documentation xml:lang="en">If true, the return departure must be from the same airport as the outbound arrival.</xs:documentation>
                                </xs:annotation>
                            </xs:attribute>
                            <xs:attribute name="RPH" type="RPH_Type" use="optional">
                                <xs:annotation>
                                    <xs:documentation xml:lang="en">Uniquely identifies this origin destination information.</xs:documentation>
                                </xs:annotation>
                            </xs:attribute>
                        </xs:extension>
                    </xs:complexContent>
                </xs:complexType>
            </xs:element>
            <xs:element name="SpecificFlightInfo" type="SpecificFlightInfoType" minOccurs="0">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Information used to specify a flight for which availablity is to be checked. </xs:documentation>
                </xs:annotation>
            </xs:element>
            <xs:element name="TravelPreferences" type="AirSearchPrefsType" minOccurs="0">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Air Availability Request preference information.</xs:documentation>
                </xs:annotation>
            </xs:element>
            <xs:element name="TravelerInfoSummary" type="TravelerInfoSummaryType" minOccurs="0">
                <xs:annotation>
                    <xs:documentation xml:lang="en">Used to specify passenger and fare information for which availablity is to be checked. </xs:documentation>
                </xs:annotation>
            </xs:element>
            <xs:element name="BookedFlightSegment" type="FlightSegmentType" minOccurs="0" maxOccurs="16">
                <xs:annotation>
                    <xs:documentation>The flight segment information contained in the passenger's current booking.</xs:documentation>
                </xs:annotation>
            </xs:element>
        </xs:sequence>
        <xs:attributeGroup ref="OTA_PayloadStdAttributes" />
        <xs:attributeGroup ref="MaxResponsesGroup">
            <xs:annotation>
                <xs:documentation xml:lang="en"> Maximum number of responses desired in the response message.</xs:documentation>
            </xs:annotation>
        </xs:attributeGroup>
        <xs:attributeGroup ref="DirectAndStopsGroup" />
    </xs:complexType>
</xs:element>