<xsd:element name="Actual">
  <xsd:annotation>
    <xsd:documentation>Refers to true and accurate   values,  based a past  event, (e.g a landing).</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType/>
</xsd:element>

<xsd:element name="Airborne">
  <xsd:annotation>
    <xsd:documentation>The segment of a flight when the aircraft is in the air.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:all>
      <xsd:element ref="Altitude" minOccurs="0"/>
      <xsd:element ref="Speed" minOccurs="0"/>
      <xsd:element ref="Coordinates" minOccurs="0"/>
      <xsd:element ref="Heading" minOccurs="0"/>
    </xsd:all>
    <xsd:attribute name="Type" type="AirborneType" use="optional" default="ASDI"/>
  </xsd:complexType>
</xsd:element>

<xsd:element name="Aircraft">
  <xsd:annotation>
    <xsd:documentation>Describes the aircraft for this flight.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="AircraftType" minOccurs="0"/>
      <xsd:element name="OptionalEquipment" type="xsd:string" minOccurs="0"/>
      <xsd:element name="WeightClass" type="xsd:string" minOccurs="0"/>
      <xsd:element name="TailNumber" type="xsd:string" minOccurs="0"/>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="OptionalEquipment" type="xsd:string" minOccurs="0"/>

<xsd:element name="WeightClass" type="xsd:string" minOccurs="0"/>

<xsd:element name="TailNumber" type="xsd:string" minOccurs="0"/>

<xsd:element name="AircraftType" type="xsd:string">
  <xsd:annotation>
    <xsd:documentation>The type of aircraft.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="Airline">
  <xsd:annotation>
    <xsd:documentation>Holds airline information for this flight</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType/>
</xsd:element>

<xsd:element name="AirlineId">
  <xsd:annotation>
    <xsd:documentation>The two or three letter code for the airline.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element name="AirlineCode" type="xsd:string">
        <xsd:annotation>
          <xsd:documentation>Two or three letter airline unique code.</xsd:documentation>
        </xsd:annotation>
      </xsd:element>
      <xsd:choice>
        <xsd:annotation>
          <xsd:documentation>Code assigning organization.</xsd:documentation>
        </xsd:annotation>
        <xsd:element name="FAACode"/>
        <xsd:element name="IATACode"/>
      </xsd:choice>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="AirlineCode" type="xsd:string">
  <xsd:annotation>
    <xsd:documentation>Two or three letter airline unique code.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="FAACode"/>

<xsd:element name="IATACode"/>

<xsd:element name="AirlineName" type="xsd:string">
  <xsd:annotation>
    <xsd:documentation>The airline name.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="Airport">
  <xsd:annotation>
    <xsd:documentation>Holds airport information for this flight's departure or arrival.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="AirportId"/>
      <xsd:element ref="AirportName" minOccurs="0"/>
      <xsd:element ref="AirportLocation" minOccurs="0"/>
      <xsd:element name="Terminal" type="xsd:string" minOccurs="0">
        <xsd:annotation>
          <xsd:documentation>The aircraft's departure or arrival terminal.</xsd:documentation>
        </xsd:annotation>
      </xsd:element>
      <xsd:element name="Gate" type="xsd:string" minOccurs="0">
        <xsd:annotation>
          <xsd:documentation>The aircraft's depature or arrival gate.</xsd:documentation>
        </xsd:annotation>
      </xsd:element>
      <xsd:element name="Baggage" type="xsd:string" minOccurs="0">
        <xsd:annotation>
          <xsd:documentation>The flight's baggage claim area identifier for arrival.</xsd:documentation>
        </xsd:annotation>
      </xsd:element>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="Terminal" type="xsd:string" minOccurs="0">
  <xsd:annotation>
    <xsd:documentation>The aircraft's departure or arrival terminal.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="Gate" type="xsd:string" minOccurs="0">
  <xsd:annotation>
    <xsd:documentation>The aircraft's depature or arrival gate.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="Baggage" type="xsd:string" minOccurs="0">
  <xsd:annotation>
    <xsd:documentation>The flight's baggage claim area identifier for arrival.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="AirportId">
  <xsd:annotation>
    <xsd:documentation>Identifies airport using three to four letter code.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element name="AirportCode" type="xsd:string">
        <xsd:annotation>
          <xsd:documentation>Three or four letter airport unique code.</xsd:documentation>
        </xsd:annotation>
      </xsd:element>
      <xsd:choice>
        <xsd:annotation>
          <xsd:documentation>Code assigning organization.</xsd:documentation>
        </xsd:annotation>
        <xsd:element name="FAACode"/>
        <xsd:element name="IATACode"/>
      </xsd:choice>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="AirportCode" type="xsd:string">
  <xsd:annotation>
    <xsd:documentation>Three or four letter airport unique code.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="FAACode"/>

<xsd:element name="IATACode"/>

<xsd:element name="AirportLocation">
  <xsd:annotation>
    <xsd:documentation>Holds location information for this airport.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="CityName" minOccurs="0"/>
      <xsd:element ref="StateId" minOccurs="0"/>
      <xsd:element ref="StateName" minOccurs="0"/>
      <xsd:element ref="ProvinceId" minOccurs="0"/>
      <xsd:element ref="CountryId" minOccurs="0"/>
      <xsd:element ref="CountryName" minOccurs="0"/>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="AirportName" type="xsd:string">
  <xsd:annotation>
    <xsd:documentation>The airport name.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="Altitude" type="xsd:unsignedInt">
  <xsd:annotation>
    <xsd:documentation>Altitude values are in feet from sea level</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="Angle" type="xsd:decimal">
  <xsd:annotation>
    <xsd:documentation>The angle in degrees, as a fixed point number to 1/100 of a degree. Values to the right of the decimal point are not minutes, but fractions of one degree. </xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="Arrival">
  <xsd:annotation>
    <xsd:documentation>The segment of a flight where the aircraft has landed at its destination.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:annotation>
        <xsd:documentation>Group of each of the elements, in order given.</xsd:documentation>
      </xsd:annotation>
      <xsd:element ref="Airport"/>
      <xsd:element ref="DateTime" minOccurs="0" maxOccurs="unbounded"/>
      <xsd:choice>
        <xsd:annotation>
          <xsd:documentation>A diverted flight can have an Alternate Arrival element.</xsd:documentation>
        </xsd:annotation>
        <xsd:element name="Original">
          <xsd:annotation>
            <xsd:documentation>This is the originally scheduled arrival point, it is not a diverted flight.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
        <xsd:element name="Alternate">
          <xsd:annotation>
            <xsd:documentation>This is an alternate arrival point, it is a diversion.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
      </xsd:choice>
      <xsd:element ref="ArrivalScheduleStatus" minOccurs="0"/>
      <xsd:element ref="DelayReason" minOccurs="0"/>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="Original">
  <xsd:annotation>
    <xsd:documentation>This is the originally scheduled arrival point, it is not a diverted flight.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="Alternate">
  <xsd:annotation>
    <xsd:documentation>This is an alternate arrival point, it is a diversion.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="ArrivalScheduleStatus" type="ArrivalScheduleStatusValues">
  <xsd:annotation>
    <xsd:documentation>Arrival status compared to schedule of flight at the arrival airport</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="Cancelled">
  <xsd:annotation>
    <xsd:documentation>Flight has been cancelled.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType/>
</xsd:element>

<xsd:element name="CityName" type="xsd:string">
  <xsd:annotation>
    <xsd:documentation>The name of a city - for an airport's location.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="CodeShare">
  <xsd:annotation>
    <xsd:documentation>Identifies a commercial flight as code share and identifies the operating flight with FlightNumber and AirlineId elements. General aviation flights cannot be code shares.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="FlightNumber"/>
      <xsd:element ref="Suffix" minOccurs="0"/>
      <xsd:element ref="CommercialAirline"/>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="CommercialAirline">
  <xsd:annotation>
    <xsd:documentation>This is a commercial air carrier.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="AirlineId"/>
      <xsd:element ref="AirlineName" minOccurs="0"/>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="Coordinates">
  <xsd:annotation>
    <xsd:documentation>Holds the latitude and longitude values to identify position.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="Longitude"/>
      <xsd:element ref="Latitude"/>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="CountryId" type="xsd:string">
  <xsd:annotation>
    <xsd:documentation>The two letter code for a country - for an airport's location.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="CountryName" type="xsd:string">
  <xsd:annotation>
    <xsd:documentation>The name of the country - for an airport's location.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="Date" type="DateType">
  <xsd:annotation>
    <xsd:documentation>The date in yyyy-mm-dd format.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="DateTime">
  <xsd:annotation>
    <xsd:documentation>Holds the date and time information. Typically only one instance is presented. If there is no time information, will be absent. May present more than one instance for different events or perspectives. </xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="Date" minOccurs="0"/>
      <xsd:element ref="Time"/>
      <xsd:choice>
        <xsd:annotation>
          <xsd:documentation>Indicates the reference time zone or time event  for the given time.</xsd:documentation>
        </xsd:annotation>
        <xsd:element ref="UTC"/>
        <xsd:element ref="Local"/>
      </xsd:choice>
      <xsd:choice minOccurs="0">
        <xsd:annotation>
          <xsd:documentation>Indicates the level of accuracy of the given time.</xsd:documentation>
        </xsd:annotation>
        <xsd:element ref="Actual"/>
        <xsd:element ref="Estimated"/>
        <xsd:element name="Scheduled">
          <xsd:annotation>
            <xsd:documentation>Specifies that intended time and date values. </xsd:documentation>
          </xsd:annotation>
        </xsd:element>
      </xsd:choice>
      <xsd:choice minOccurs="0">
        <xsd:annotation>
          <xsd:documentation>Indicates the position of aircraft at the given time. Will not be present if position  reference unspecified.</xsd:documentation>
        </xsd:annotation>
        <xsd:element name="RunwayTime">
          <xsd:annotation>
            <xsd:documentation>Time is relative to wheels up   off the runway or wheels down on the runway.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
        <xsd:element name="GateTime">
          <xsd:annotation>
            <xsd:documentation>Time is relative to arrival at the gate or departure from the gate.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
      </xsd:choice>
      <xsd:choice minOccurs="0">
        <xsd:annotation>
          <xsd:documentation>Indicates the data source of the date and time data.</xsd:documentation>
        </xsd:annotation>
        <xsd:element name="AirlineData">
          <xsd:annotation>
            <xsd:documentation>Indicates that date and/or time date comes from airline data sources.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
        <xsd:element name="ScheduleData">
          <xsd:annotation>
            <xsd:documentation>Indicates that date and/or time data comes from schedule provider sources.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
        <xsd:element name="FlightViewData">
          <xsd:annotation>
            <xsd:documentation>Indicates that date and/or time data comes from FlightView enhanced FAA data sources.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
      </xsd:choice>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="Scheduled">
  <xsd:annotation>
    <xsd:documentation>Specifies that intended time and date values. </xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="RunwayTime">
  <xsd:annotation>
    <xsd:documentation>Time is relative to wheels up   off the runway or wheels down on the runway.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="GateTime">
  <xsd:annotation>
    <xsd:documentation>Time is relative to arrival at the gate or departure from the gate.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="AirlineData">
  <xsd:annotation>
    <xsd:documentation>Indicates that date and/or time date comes from airline data sources.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="ScheduleData">
  <xsd:annotation>
    <xsd:documentation>Indicates that date and/or time data comes from schedule provider sources.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="FlightViewData">
  <xsd:annotation>
    <xsd:documentation>Indicates that date and/or time data comes from FlightView enhanced FAA data sources.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="Delayed">
  <xsd:annotation>
    <xsd:documentation>Flight has been delayed.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType/>
</xsd:element>

<xsd:element name="DelayReason">
  <xsd:annotation>
    <xsd:documentation>Airline delay reason codes.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element name="Code" maxOccurs="unbounded">
        <xsd:simpleType>
          <xsd:restriction base="xsd:string">
            <xsd:pattern value="[a-zA-Z0-9]+"/>
          </xsd:restriction>
        </xsd:simpleType>
      </xsd:element>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="Code" maxOccurs="unbounded">
  <xsd:simpleType>
    <xsd:restriction base="xsd:string">
      <xsd:pattern value="[a-zA-Z0-9]+"/>
    </xsd:restriction>
  </xsd:simpleType>
</xsd:element>

<xsd:element name="Departure">
  <xsd:annotation>
    <xsd:documentation>The segment of a flight where the aircraft will depart or has departed.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:annotation>
        <xsd:documentation>Group of each of the elements, in order given.</xsd:documentation>
      </xsd:annotation>
      <xsd:element ref="Airport"/>
      <xsd:element ref="DateTime" minOccurs="0" maxOccurs="unbounded"/>
      <xsd:choice>
        <xsd:annotation>
          <xsd:documentation>A diverted flight can have an Alternate Departure element.</xsd:documentation>
        </xsd:annotation>
        <xsd:element name="Original">
          <xsd:annotation>
            <xsd:documentation>This is the originally scheduled departure point, it is not a diversion recovery flight.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
        <xsd:element name="Alternate">
          <xsd:annotation>
            <xsd:documentation>This is an alternate to the originally scheduled departure point, it is a flight to recover from a diversion.  </xsd:documentation>
          </xsd:annotation>
        </xsd:element>
      </xsd:choice>
      <xsd:element ref="DepartureScheduleStatus" minOccurs="0"/>
      <xsd:element ref="DelayReason" minOccurs="0"/>
      <xsd:element name="CheckInCounter" type="xsd:string" minOccurs="0"/>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="Original">
  <xsd:annotation>
    <xsd:documentation>This is the originally scheduled departure point, it is not a diversion recovery flight.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="Alternate">
  <xsd:annotation>
    <xsd:documentation>This is an alternate to the originally scheduled departure point, it is a flight to recover from a diversion.  </xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="CheckInCounter" type="xsd:string" minOccurs="0"/>

<xsd:element name="DepartureScheduleStatus" type="DepartureScheduleStatusValues">
  <xsd:annotation>
    <xsd:documentation>Departure status compared to schedule of flight at the departure airport.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="DownLineInfo">
  <xsd:annotation>
    <xsd:documentation>Pairs of departure and arrival airports for all the downstream legs relative to this flight leg,</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="FlightLeg" maxOccurs="unbounded"/>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="Duration" type="xsd:duration">
  <xsd:annotation>
    <xsd:documentation>Holds a duration value in PnYnMnDTnHnMnS format</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="East">
  <xsd:annotation>
    <xsd:documentation>Specifies that  longitude angle values are measured east from the prime  meridian.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType/>
</xsd:element>

<xsd:element name="Elapsed">
  <xsd:annotation>
    <xsd:documentation>Indicates how much time has passed since departure in hh:mm:ss format. Computed only for InAir flights.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType/>
</xsd:element>

<xsd:element name="Estimated">
  <xsd:annotation>
    <xsd:documentation>Specifies that the time and date values are estimated based on near-real time flight data and projections. </xsd:documentation>
  </xsd:annotation>
  <xsd:complexType/>
</xsd:element>

<xsd:element name="Expected">
  <xsd:annotation>
    <xsd:documentation>A FlightView data source indicates flight is expected to arrive at arrival airport.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType/>
</xsd:element>

<xsd:element name="FaaId" type="FaaIdType"/>

<xsd:element name="Flight">
  <xsd:annotation>
    <xsd:documentation>Holds the information for a single flight. Attribute FlightId uniquely identifies a Flight within FlightViewResults</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="FlightId"/>
      <xsd:element ref="FaaId" minOccurs="0"/>
      <xsd:element ref="Aircraft" minOccurs="0"/>
      <xsd:element ref="FlightStatus"/>
      <xsd:element ref="ScheduleStatus" minOccurs="0"/>
      <xsd:element ref="Departure" minOccurs="0" maxOccurs="2"/>
      <xsd:element ref="Arrival" minOccurs="0" maxOccurs="2"/>
      <xsd:element ref="SvcType" minOccurs="0"/>
      <xsd:element ref="SchedInfoPresent" minOccurs="0"/>
      <xsd:element ref="RelativeTime" minOccurs="0"/>
      <xsd:element ref="TimeSinceLanding" minOccurs="0"/>
      <xsd:element ref="FlightDuration" minOccurs="0"/>
      <xsd:element ref="Airborne" minOccurs="0"/>
      <xsd:element ref="Map" minOccurs="0"/>
      <xsd:element ref="SeqNum" minOccurs="0"/>
      <xsd:element ref="NumLegs" minOccurs="0"/>
      <xsd:element name="AircraftPreviousFlightLeg" minOccurs="0">
        <xsd:annotation>
          <xsd:documentation>Identifies previous leg of the same aircraft</xsd:documentation>
        </xsd:annotation>
        <xsd:complexType>
          <xsd:sequence>
            <xsd:element ref="FlightId"/>
            <xsd:element name="Arrival">
              <xsd:complexType>
                <xsd:sequence>
                  <xsd:element ref="DateTime"/>
                </xsd:sequence>
              </xsd:complexType>
            </xsd:element>
          </xsd:sequence>
        </xsd:complexType>
      </xsd:element>
      <xsd:element ref="UpLineInfo" minOccurs="0"/>
      <xsd:element ref="DownLineInfo" minOccurs="0"/>
    </xsd:sequence>
    <xsd:attribute name="FlightId" type="xsd:string" use="required"/>
  </xsd:complexType>
</xsd:element>

<xsd:element name="AircraftPreviousFlightLeg" minOccurs="0">
  <xsd:annotation>
    <xsd:documentation>Identifies previous leg of the same aircraft</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="FlightId"/>
      <xsd:element name="Arrival">
        <xsd:complexType>
          <xsd:sequence>
            <xsd:element ref="DateTime"/>
          </xsd:sequence>
        </xsd:complexType>
      </xsd:element>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="Arrival">
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="DateTime"/>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="FlightDuration">
  <xsd:annotation>
    <xsd:documentation>Duration of the flight.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="Time"/>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="FlightId">
  <xsd:annotation>
    <xsd:documentation>Identifies the flight.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:element ref="FlightNumber"/>
      <xsd:element ref="Suffix" minOccurs="0"/>
      <xsd:choice>
        <xsd:element ref="CommercialAirline"/>
        <xsd:element name="GeneralAviation">
          <xsd:annotation>
            <xsd:documentation>This is a General Aviation flight. (This flight information is not available for the general public.)</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
      </xsd:choice>
      <xsd:element ref="RegionalCarrier" minOccurs="0"/>
      <xsd:element ref="OrigDate" minOccurs="0"/>
      <xsd:element name="OperatingFlight" minOccurs="0">
        <xsd:annotation>
          <xsd:documentation>Identifies a commercial flight as the operating flight in a code share. General aviation flights cannot be the operating flight in a code share.</xsd:documentation>
        </xsd:annotation>
      </xsd:element>
      <xsd:element ref="CodeShare" minOccurs="0" maxOccurs="unbounded"/>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>

<xsd:element name="GeneralAviation">
  <xsd:annotation>
    <xsd:documentation>This is a General Aviation flight. (This flight information is not available for the general public.)</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="OperatingFlight" minOccurs="0">
  <xsd:annotation>
    <xsd:documentation>Identifies a commercial flight as the operating flight in a code share. General aviation flights cannot be the operating flight in a code share.</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="FlightLeg">
  <xsd:annotation>
    <xsd:documentation>Single pair of departure and arrival airports for an upstream/downstream leg.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:attribute name="Departure" type="AirportCodeType" use="required"/>
    <xsd:attribute name="DepContext" type="ApCodeContextType" use="required"/>
    <xsd:attribute name="Arrival" type="AirportCodeType" use="required"/>
    <xsd:attribute name="ArrContext" type="ApCodeContextType" use="required"/>
  </xsd:complexType>
</xsd:element>

<xsd:element name="FlightNumber" type="xsd:string">
  <xsd:annotation>
    <xsd:documentation>Commercial Flights:  one to four characters, first character is always a digit; if more than one character then all must be digits except the last one which can be a digit or a letter.  General Aviation Flights:  one letter followed by one to six letters or digits (this can be the tail number).</xsd:documentation>
  </xsd:annotation>
</xsd:element>

<xsd:element name="FlightStatus">
  <xsd:annotation>
    <xsd:documentation>Holds the status of a flight, such as whether it's in the air, landed, etc.</xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:sequence>
      <xsd:choice>
        <xsd:annotation>
          <xsd:documentation>Flight status relative to its plan.</xsd:documentation>
        </xsd:annotation>
        <xsd:element ref="Scheduled"/>
        <xsd:element ref="Proposed" minOccurs="0"/>
        <xsd:element ref="InAir"/>
        <xsd:element ref="Landed"/>
        <xsd:element ref="Cancelled"/>
        <xsd:element ref="Delayed"/>
        <xsd:element ref="NoTakeoffInfo"/>
        <xsd:element ref="Unknown"/>
        <xsd:element name="Holding" minOccurs="0">
          <xsd:annotation>
            <xsd:documentation>(reserved element for flight status)</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
        <xsd:element name="OutGate" minOccurs="0">
          <xsd:annotation>
            <xsd:documentation>Flight has left the gate and is awaiting take-off.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
        <xsd:element name="InGate" minOccurs="0">
          <xsd:annotation>
            <xsd:documentation>Flight has arrived in the gate.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
        <xsd:element ref="Expected" minOccurs="0"/>
        <xsd:element ref="PastFlight" minOccurs="0"/>
      </xsd:choice>
      <xsd:choice>
        <xsd:annotation>
          <xsd:documentation>Flight status relative to diversion cases.</xsd:documentation>
        </xsd:annotation>
        <xsd:element name="Original">
          <xsd:annotation>
            <xsd:documentation>Flight is on its original flight plan.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
        <xsd:element name="Diverted">
          <xsd:annotation>
            <xsd:documentation>Flight is diverted from its original flight plan.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
        <xsd:element name="Recovery">
          <xsd:annotation>
            <xsd:documentation>Flight is a recovery from a previous diversion.</xsd:documentation>
          </xsd:annotation>
        </xsd:element>
      </xsd:choice>
      <xsd:element name="Remark" minOccurs="0">
        <xsd:annotation>
          <xsd:documentation>This optional element value is a recomended display value of the actual flight status.</xsd:documentation>
        </xsd:annotation>
      </xsd:element>
    </xsd:sequence>
  </xsd:complexType>
</xsd:element>