Aviation Standards Cross-Reference

Comparison of aviation data standards (FIXM, AIXM, IWXXM)

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Aviation Data Exchange Standards - Consolidated Field Reference

Version: 1.1

Date: 2026-01-27

Purpose: Cross-reference of equivalent field names across aviation data exchange standards

> FIXM Migration (2026-01-27): VATSWIM is transitioning to FIXM-aligned column naming.

> Legacy OOOI columns (out_utc, off_utc, on_utc, in_utc) are being replaced with

> FIXM-aligned names (actual_off_block_time, actual_time_of_departure, actual_landing_time,

> actual_in_block_time). Both columns populated during 30-day transition.

> See VATSWIM_FIXM_Field_Mapping.md for complete mapping.

1. Flight Identification

Concept	FIXM 4.3	AIDX 22.1	TFMS/FAA	A-CDM	ARINC 633	VATSWIM
Unique flight ID	`gufi`	—	`ACID` + `DEP` + `DEST` + `ETD`	—	—	`gufi`
Callsign	`flightIdentification/aircraftIdentification`	`FlightId/FlightNumber`	`ACID`	`arcid`	`FlightNumber`	`callsign`
Airline code	`flightIdentification/majorCarrierIdentifier`	`FlightId/AirlineIATA`	`AIRLINE`	`aobt`	`AirlineCode`	`airline_icao`
Flight number	`flightIdentification/flightNumber`	`FlightId/FlightNumber`	—	—	`FlightNumber`	—
CID/Pilot ID	—	—	—	—	—	`cid` (VATSIM-specific)

2. Aircraft Information

Concept	FIXM 4.3	AIDX 22.1	TFMS/FAA	A-CDM	ICAO FPL	VATSWIM
Aircraft type	`aircraft/aircraftType/icaoAircraftTypeDesignator`	`AircraftType/AircraftIATACode`	`ACFT_TYPE`	`arctyp`	Field 9	`aircraft_type`
Registration	`aircraft/registration`	`AircraftType/AircraftRegistration`	`REG`	`reg`	Field 7	`registration`
Wake category	`aircraft/wakeTurbulence`	—	`WAKE`	`wtc`	Field 9	`wake_category`
Weight class	—	—	`WEIGHT_CLASS`	—	—	`weight_class`
Equipment	`aircraft/capabilities`	—	`EQUIP`	—	Field 10	`equipment`

Wake Turbulence Categories

Category	FIXM	ICAO	FAA	Description
Light	`LIGHT`	`L`	`SMALL`	<7,000 kg / 15,500 lbs
Medium	`MEDIUM`	`M`	`LARGE`	7,000-136,000 kg
Heavy	`HEAVY`	`H`	`HEAVY`	>136,000 kg / 300,000 lbs
Super	`SUPER`	`J`	`SUPER`	A380, AN-225

3. Departure Information

Concept	FIXM 4.3	AIDX 22.1	TFMS/FAA	A-CDM	ACARS/633	VATSWIM
Departure airport	`departure/aerodrome/locationIndicator`	`DepartureAirport`	`DEP`	`adep`	`DepAirport`	`dept_icao`
Departure gate	`departure/departurePoint/stand`	`DepartureGate`	—	`dgate`	`Gate`	`dept_gate`
Departure runway	`departure/runwayDirection/designator`	`DepartureRunway`	`DEP_RWY`	`drwy`	—	`dept_runway`
Departure fix	`departure/departurePoint/fix`	—	`DEP_FIX`	—	—	`dept_fix`
SID	`routeTrajectoryGroup/routeInformation/sidStarReference`	—	`SID`	—	—	`sid`

4. Arrival Information

Concept	FIXM 4.3	AIDX 22.1	TFMS/FAA	A-CDM	ACARS/633	VATSWIM
Destination airport	`arrival/destinationAerodrome/locationIndicator`	`ArrivalAirport`	`DEST`	`ades`	`ArrAirport`	`dest_icao`
Arrival gate	`arrival/arrivalPoint/stand`	`ArrivalGate`	—	`agate`	`Gate`	`dest_gate`
Arrival runway	`arrival/runwayDirection/designator`	`ArrivalRunway`	`ARR_RWY`	`arwy`	—	`dest_runway`
Arrival fix	`arrival/destinationPoint/fix`	—	`ARR_FIX`	—	—	`arr_fix`
STAR	`routeTrajectoryGroup/routeInformation/sidStarReference`	—	`STAR`	—	—	`star`
Alternate	`arrival/destinationAerodromeAlternate`	`AlternateAirport`	`ALT`	—	`AltAirport`	`alternate`

5. Route & Trajectory

Concept	FIXM 4.3	AIDX 22.1	TFMS/FAA	ICAO FPL	VATSWIM
Route string	`routeTrajectoryGroup/element/routeDesignator`	—	`ROUTE`	Field 15	`route`
Filed altitude	`routeTrajectoryGroup/cruisingLevel`	—	`REQ_ALT`	Field 15	`cruise_altitude`
Filed speed	`routeTrajectoryGroup/cruisingSpeed`	—	`SPEED`	Field 15	`cruise_speed`
Route distance	`routeTrajectoryGroup/routeDistance`	—	—	—	`route_distance_nm`
4D trajectory	`routeTrajectoryGroup/element/point4D`	—	`TRAJECTORY`	—	—

6. Time Fields - COMPREHENSIVE

6.1 Departure Times

Time Type	FIXM 4.3	AIDX 22.1	TFMS/FAA	A-CDM	ACARS	VATSWIM
Scheduled departure	`departure/estimatedTime` (with qualifier)	`ScheduledDepartureDateTime`	`SDTE`	`sibt`	—	`scheduled_dept_utc`
Estimated off-block	`departure/estimatedOffBlockTime`	`EstimatedOffBlockDateTime`	`EOBT`	`eobt`	—	`etd_utc`
Target off-block	`departure/targetOffBlockTime`	`TargetOffBlockDateTime`	`TOBT`	`tobt`	—	`tobt_utc`
Target startup approval	`departure/targetStartupApprovalTime`	—	`TSAT`	`tsat`	—	`tsat_utc`
Target takeoff	`departure/targetTakeOffTime`	`TargetDepartureDateTime`	`TTOT`	`ttot`	—	`ttot_utc`
Estimated runway	`departure/estimatedRunwayTime`	—	`P-TIME` / `ERDT`	`etot`	—	`etd_runway_utc`
Actual off-block	`departure/actualOffBlockTime`	`ActualOffBlockDateTime`	`AOBT`	`aobt`	`OUT`	`out_utc`
Actual takeoff	`departure/actualTimeOfDeparture`	`ActualDepartureDateTime`	`ATD` / `ATOT`	`atot`	`OFF`	`off_utc`
Controlled departure	`departure/controlledOffBlockTime`	—	`CTD` / `EDCT`	`ctot`	—	`ctd_utc` / `edct_utc`

6.2 Arrival Times

Time Type	FIXM 4.3	AIDX 22.1	TFMS/FAA	A-CDM	ACARS	VATSWIM
Scheduled arrival	`arrival/estimatedTime` (with qualifier)	`ScheduledArrivalDateTime`	`SATE`	`sibt`	—	`scheduled_arr_utc`
Estimated landing	`arrival/estimatedArrivalTime`	`EstimatedArrivalDateTime`	`ETA`	`eldt`	—	`eta_utc`
Estimated runway	`arrival/estimatedRunwayTime`	—	`ERTA`	`eldt`	—	`eta_runway_utc`
Estimated in-block	`arrival/estimatedInBlockTime`	`EstimatedInBlockDateTime`	—	`eibt`	—	`eta_gate_utc`
Target landing	`arrival/targetLandingTime`	`TargetArrivalDateTime`	`TLDT`	`tldt`	—	`tldt_utc`
Target in-block	`arrival/targetInBlockTime`	`TargetInBlockDateTime`	—	`tibt`	—	`tibt_utc`
Actual landing	`arrival/actualLandingTime`	`ActualArrivalDateTime`	`ATA` / `ALDT`	`aldt`	`ON`	`on_utc`
Actual in-block	`arrival/actualInBlockTime`	`ActualInBlockDateTime`	`AIBT`	`aibt`	`IN`	`in_utc`
Controlled arrival	`arrival/controlledArrivalTime`	—	`CTA`	`cta`	—	`cta_utc`

6.3 OOOI Times (Out-Off-On-In)

Event	FIXM 4.3	AIDX 22.1	TFMS	A-CDM	ACARS	VATSWIM
OUT (pushback)	`departure/actualOffBlockTime`	`ActualOffBlockDateTime`	`AOBT`	`aobt`	`OUT`	`out_utc`
OFF (wheels up)	`departure/actualTimeOfDeparture`	`ActualDepartureDateTime`	`ATOT`	`atot`	`OFF`	`off_utc`
ON (wheels down)	`arrival/actualLandingTime`	`ActualArrivalDateTime`	`ALDT`	`aldt`	`ON`	`on_utc`
IN (at gate)	`arrival/actualInBlockTime`	`ActualInBlockDateTime`	`AIBT`	`aibt`	`IN`	`in_utc`

6.4 Time Prefixes (TFMS Convention)

Prefix	Meaning	Example	VATSIM Mapping
`S`	Scheduled	SDTE, SATE	`scheduled_`
`E`	Estimated	EOBT, ETA	`eta_`, `etd_`
`T`	Target	TOBT, TSAT, TTOT, TLDT	`tobt_`, `tsat_`
`A`	Actual	AOBT, ATOT, ALDT, AIBT	`out_`, `off_`, `on_`, `in_`
`C`	Controlled	CTD, CTA, CTOT	`ctd_`, `cta_`
`P`	Proposed	P-TIME	`proposed_`

7. Flight Status & Phase

7.1 Flight Status

Status	FIXM FlightStatusType	AIDX FlightLegStatus	TFMS	VATSWIM
Unknown	`UNKNOWN`	—	—	`UNKNOWN`
Scheduled	`SCHEDULED`	`Scheduled`	`SKED`	`SCHEDULED`
Filed	`FILED`	—	`FILED`	`FILED`
Active/Ready	`ACTIVE`	`Active`	`ACTV`	`ACTIVE`
Taxiing	—	`Boarding`	—	`TAXIING`
Departed	`ASCENDING`	`Departed`	`DEP`	`DEPARTED`
Airborne/Enroute	`CRUISING`	`InFlight`	`ENRT`	`ENROUTE`
Descending	`DESCENDING`	—	`DSC`	`DESCENT`
Arrived	—	`Arrived`	`ARR`	`ARRIVED`
Completed	`COMPLETED`	`Completed`	`COMP`	`COMPLETED`
Cancelled	`CANCELLED`	`Cancelled`	`CNX`	`CANCELLED`
Diverted	—	`Diverted`	`DIV`	`DIVERTED`
Controlled	`CONTROLLED`	—	`CTRL`	`CONTROLLED`
Decontrolled	`DECONTROLLED`	—	`DCTL`	`DECONTROLLED`

7.2 Flight Phase (Detailed)

Phase	FIXM	TFMS/FSM	EUROCONTROL	VATSWIM
Pre-departure	`FILED`	`PROPOSED`	`PLANNED`	`PROPOSED`
At gate (ready)	`ACTIVE`	`ACTIVE`	`TAXI`	`DEPARTING`
Taxi out	—	`TAXI`	`TAXI`	`TAXI_OUT`
Takeoff roll	—	—	`DEPARTURE`	`TAKEOFF`
Initial climb	`ASCENDING`	`CLIMBING`	`CLIMB`	`CLIMBING`
Enroute	`CRUISING`	`ENROUTE`	`CRUISE`	`ENROUTE`
Top of descent	`DESCENDING`	`DESCENDING`	`DESCENT`	`DESCENT`
Approach	—	`APPROACH`	`APPROACH`	`APPROACH`
Landing	—	—	`LANDING`	`LANDING`
Taxi in	—	`TAXI`	`TAXI`	`TAXI_IN`
At gate (arrived)	`COMPLETED`	`ARRIVED`	`PARKED`	`ARRIVED`

8. Position & Track Data

Concept	FIXM 4.3	ASTERIX CAT062	ADS-B	GeoJSON	VATSWIM
Latitude	`position/position/latitude`	I062/105	Lat	`coordinates[1]`	`lat`
Longitude	`position/position/longitude`	I062/105	Lon	`coordinates[0]`	`lon`
Altitude (pressure)	`position/altitude/altitude`	I062/136	FL	`coordinates[2]`	`altitude_ft`
Altitude (geometric)	`position/altitude/geometricAltitude`	I062/130	GNSS Alt	—	`geo_altitude_ft`
Heading	`position/track/heading`	I062/180	Heading	`properties.heading`	`heading`
Ground speed	`position/track/groundSpeed`	I062/185	GS	`properties.groundspeed`	`groundspeed_kts`
Vertical rate	`position/track/verticalRate`	I062/220	VRate	`properties.vertical_rate`	`vertical_rate_fpm`
Track angle	`position/track/trackAngle`	I062/180	Track	—	`track`

9. TMI (Traffic Management Initiative) Data

9.1 TMI Types

TMI Type	FIXM US Extension	TFMS	EUROCONTROL	VATSWIM
Ground Stop	`nas:groundStop`	`GS`	`GS`	`GS`
Ground Delay Program	`nas:groundDelayProgram`	`GDP`	`GDP`	`GDP`
Airspace Flow Program	`nas:airspaceFlowProgram`	`AFP`	`AFP`	`AFP`
Miles-in-Trail	`nas:milesInTrail`	`MIT`	`MIT`	`MIT`
Minutes-in-Trail	`nas:minutesInTrail`	`MINIT`	`MINIT`	`MINIT`
CTOP	`nas:ctop`	`CTOP`	—	`CTOP`
Reroute	`nas:reroute`	`RR`	`RR`	`REROUTE`

9.2 TMI Fields

Concept	FIXM US Extension	TFMS	VATSWIM
Controlled element	`nas:controlElement`	`FCA` / `FEA`	`control_element`
Control program name	`nas:controlProgram`	`PROGRAM_NAME`	`control_program`
EDCT	`nas:edct/time`	`EDCT`	`edct_utc`
Slot time	`nas:slot/time`	`SLOT_TIME`	`slot_time_utc`
Slot ID	`nas:slot/slotId`	`SLOT_ID`	`slot_id`
Delay minutes	`nas:delay/delayValue`	`DELAY`	`delay_minutes`
Delay status	`nas:delay/delayStatus`	`DLY_STATUS`	`delay_status`
Exempt flag	`nas:exemptIndicator`	`EXEMPT`	`is_exempt`
Exempt reason	`nas:exemptReason`	`EXEMPT_REASON`	`exempt_reason`

9.3 Delay Status Codes (TFMS)

Code	Meaning	VATSWIM
`GDP`	Ground Delay Program delay	`GDP`
`AFP`	Airspace Flow Program delay	`AFP`
`GSD`	Ground Stop Delay	`GSD`
`ALD`	Airline Delay	`ALD`
`DAS`	Delay Assignment	`DAS`
`TOD`	Time Out Delayed	`TOD`
`CTOP`	CTOP delay	`CTOP`
`APREQ`	Approval Request delay	`APREQ`

9.4 Cancellation Status Codes (TFMS CNX)

Code	Meaning	VATSWIM
`UX`	Update cancelled	`UX`
`FX`	Airline/flight cancelled	`FX`
`RZ`	NAS cancelled	`RZ`
`RS`	Schedule (OAG) cancelled	`RS`
`TO`	Time Out cancelled	`TO`
`DV`	Diverted	`DV`
`RM`	Removed from system	`RM`
`ID`	ID/Callsign changed	`ID`

10. A-CDM Milestones (Airport Collaborative Decision Making)

Milestone	Full Name	A-CDM Code	AIDX	FIXM	VATSWIM
SOBT	Scheduled Off-Block Time	`sobt`	`ScheduledDepartureDateTime`	—	`scheduled_dept_utc`
EOBT	Estimated Off-Block Time	`eobt`	`EstimatedOffBlockDateTime`	`estimatedOffBlockTime`	`etd_utc`
TOBT	Target Off-Block Time	`tobt`	`TargetOffBlockDateTime`	`targetOffBlockTime`	`tobt_utc`
TSAT	Target Startup Approval Time	`tsat`	—	`targetStartupApprovalTime`	`tsat_utc`
ASAT	Actual Startup Approval Time	`asat`	—	—	`asat_utc`
AOBT	Actual Off-Block Time	`aobt`	`ActualOffBlockDateTime`	`actualOffBlockTime`	`out_utc`
EXOT	Estimated Taxi-Out Time	`exot`	—	—	`taxi_out_min`
AXOT	Actual Taxi-Out Time	`axot`	—	—	`actual_taxi_out_min`
TTOT	Target Takeoff Time	`ttot`	`TargetDepartureDateTime`	`targetTakeOffTime`	`ttot_utc`
ETOT	Estimated Takeoff Time	`etot`	—	—	`etd_runway_utc`
ATOT	Actual Takeoff Time	`atot`	`ActualDepartureDateTime`	`actualTimeOfDeparture`	`off_utc`
ELDT	Estimated Landing Time	`eldt`	`EstimatedArrivalDateTime`	`estimatedArrivalTime`	`eta_runway_utc`
TLDT	Target Landing Time	`tldt`	`TargetArrivalDateTime`	`targetLandingTime`	`tldt_utc`
ALDT	Actual Landing Time	`aldt`	`ActualArrivalDateTime`	`actualLandingTime`	`on_utc`
EIBT	Estimated In-Block Time	`eibt`	`EstimatedInBlockDateTime`	`estimatedInBlockTime`	`eta_gate_utc`
TIBT	Target In-Block Time	`tibt`	`TargetInBlockDateTime`	`targetInBlockTime`	`tibt_utc`
AIBT	Actual In-Block Time	`aibt`	`ActualInBlockDateTime`	`actualInBlockTime`	`in_utc`
SIBT	Scheduled In-Block Time	`sibt`	`ScheduledArrivalDateTime`	—	`scheduled_arr_utc`

11. Airspace & Facility References

Concept	FIXM 4.3	AIXM 5.1	TFMS	VATSWIM
ARTCC/FIR	`airspace/designator`	`AirspaceDesignator`	`CTR`	`artcc`
Sector	`airspace/sectorIdentifier`	`SectorDesignator`	`SECTOR`	`sector`
TRACON	—	`AirspaceDesignator`	`TRACON`	`tracon`
Fix/Waypoint	`routePoint/fix`	`DesignatedPoint`	`FIX`	`fix`
Airway	`routeSegment/airway`	`Route`	`AIRWAY`	`airway`
FCA (Flow Control Area)	`nas:flowControlArea`	—	`FCA`	`fca`
FEA (Flow Evaluation Area)	`nas:flowEvaluationArea`	—	`FEA`	`fea`

12. Weather Integration (IWXXM/WXXM)

Concept	IWXXM 3.0	METAR/TAF	GFS/GRIB	VATSWIM
Wind direction	`iwxxm:windDirection`	`ddd`	`UGRD`/`VGRD`	`wind_dir_deg`
Wind speed	`iwxxm:windSpeed`	`ff`	`WIND`	`wind_speed_kts`
Temperature	`iwxxm:airTemperature`	`TT`	`TMP`	`temperature_c`
Visibility	`iwxxm:prevailingVisibility`	`VVVV`	—	`visibility_sm`
Ceiling	`iwxxm:cloudLayer/base`	`ccc`	—	`ceiling_ft`
Altimeter	`iwxxm:qnh`	`AAAA`	`PRMSL`	`altimeter_inhg`

13. Response Envelope Standards

JSON Response (REST API)

{
  "success": true,
  "data": { },
  "timestamp": "2026-01-16T12:00:00Z",
  "meta": {
    "source": "vatcscc",
    "schema_version": "1.0.0"
  }
}

FIXM XML Envelope

<fx:Flight xmlns:fx="http://www.fixm.aero/flight/4.3"
           xmlns:fb="http://www.fixm.aero/base/4.3"
           xmlns:nas="http://www.faa.aero/nas/4.3">
  <fx:gufi>VAT-20260116-UAL123-KJFK-KLAX</fx:gufi>
  ...
</fx:Flight>

AIDX XML Envelope

<aidx:IATA_AIDX_FlightLegNotifRQ
    xmlns:aidx="http://www.iata.org/IATA/2007/00"
    Version="22.1">
  <aidx:FlightLeg>
    ...
  </aidx:FlightLeg>
</aidx:IATA_AIDX_FlightLegNotifRQ>

14. Quick Reference: VATSWIM ↔ Standards Mapping

VATSWIM Field	FIXM	AIDX	TFMS	A-CDM
`gufi`	`gufi`	—	composite	—
`callsign`	`aircraftIdentification`	`FlightNumber`	`ACID`	`arcid`
`dept_icao`	`departure/aerodrome`	`DepartureAirport`	`DEP`	`adep`
`dest_icao`	`arrival/destinationAerodrome`	`ArrivalAirport`	`DEST`	`ades`
`aircraft_type`	`aircraft/aircraftType`	`AircraftType`	`ACFT_TYPE`	`arctyp`
`out_utc`	`actualOffBlockTime`	`ActualOffBlockDateTime`	`AOBT`	`aobt`
`off_utc`	`actualTimeOfDeparture`	`ActualDepartureDateTime`	`ATOT`	`atot`
`on_utc`	`actualLandingTime`	`ActualArrivalDateTime`	`ALDT`	`aldt`
`in_utc`	`actualInBlockTime`	`ActualInBlockDateTime`	`AIBT`	`aibt`
`eta_utc`	`estimatedArrivalTime`	`EstimatedArrivalDateTime`	`ETA`	`eldt`
`etd_utc`	`estimatedOffBlockTime`	`EstimatedOffBlockDateTime`	`EOBT`	`eobt`
`ctd_utc`	`targetStartupApprovalTime`	—	`EDCT`	`ctot`
`phase`	`FlightStatusType`	`FlightLegStatus`	status	—
`gs_held`	`groundStop`	—	`GS`	—
`delay_minutes`	`delay/delayValue`	—	`DELAY`	—
`slot_time_utc`	`slot/time`	—	`SLOT_TIME`	—

15. Namespace Reference

Standard	Namespace URI	Prefix
FIXM Core 4.3	`http://www.fixm.aero/flight/4.3`	`fx`
FIXM Base 4.3	`http://www.fixm.aero/base/4.3`	`fb`
FIXM US Extension	`http://www.faa.aero/nas/4.3`	`nas`
AIXM 5.1	`http://www.aixm.aero/schema/5.1`	`aixm`
IWXXM 3.0	`http://icao.int/iwxxm/3.0`	`iwxxm`
AIDX 22.1	`http://www.iata.org/IATA/2007/00`	`aidx`
GML 3.2	`http://www.opengis.net/gml/3.2`	`gml`
GeoJSON	— (JSON format)	—
vATCSCC Extension	`http://vatcscc.org/schema/1.0`	`vatc`

Document generated for VATSWIM API standards alignment