Text NOTAM production rules

This section provides rules for the automated production of the text NOTAM message items, based on the AIXM 5.1.1 data encoding of the Event. Therefore, AIXM specific terms are used, such as names of features and properties, types of TimeSlices, etc:

  • the abbreviation APN.BL. indicates that the corresponding data item must be taken from the Apron BASELINE;

  • the abbreviation APE.BL. indicates that the corresponding data item must be taken from the ApronElement BASELINE that was created ad-hoc for the Event;

  • the abbreviation AHP.BL. indicates that the corresponding data item must be taken from the AirportHeliport BASELINE associated with the Apron that is associated with the ApronElement concerned;

In general, the ICAO DOC 8126 and the OPADD rules shall be followed. These have not been copied in this document in order to avoid duplication with those documents. Only instructions that are specific to the AIXM encoding of this event are stated here.

On this page

Item A

The item A shall be generated according to the general production rules for item A using the Event.concernedAirportHeliport.

Item Q

Q code

The following mapping shall be used:

APE.BL.availability.ApronAreaAvailability

timeIntervalusage.ApronAreaUsageCorresponding Q Code

type

priorPermission../FlightCharacteristics../AircraftCharacteristics
any'FORBID'anyanyweight not NILQMNLH
any other combinationQMNLT
Scope

Insert the value ‘A’.

Lower limit / Upper limit

Use “000/999”

Geographical reference

Insert the coordinate of the ARP (AHP.BL.ARP.ElevatedPoint) of the airport, formatted as follows:

  • the set of coordinates comprises 11 characters rounded up or down to the nearest minute; i.e. Latitude (N/S) in 5 characters; Longitude (E/W) in 6 characters;

  • the radius value is “005”.

Items B, C and D

Items B and C shall be decoded following the common production rules.

If at least one APE.BL.availability.ApronAreaAvailability.timeInterval exists (i.e. the Event has an associated schedule), then all such Timesheet(s) shall be represented in item D according to the common NOTAM production rules for Item D, E - Schedules. Otherwise, item D shall be left empty.

Item E

The following pattern should be used as a base for generating the E field text from the AIXM data:

EBNF Code 
template = ["(1)" "AHP.BL.type (2)" ("AHP.BL.name (3a)" | "AHP.BL.ARP (3b)")] \n
"Apron (4)" "APN.BL.name" "APE.BL.annotation (5)" \n
"APE.BL.usage.type(6)" (["APE.BL.usage.flight(7)"] ["APE.BL.usage.aircraft(8)"]) {"(9)" ","  (["APE.BL.usage.flight(7)"] ["APE.BL.usage.aircraft(8)"])} ["conditions(10)"].

template_bottom = ["." "\n" "Due to" "APE.BL.availability.annotation(11)"] \n
{"." "\n" "APE.BL.availability.annotation(12)"} ".".

Reference

Data item (from coding scenario)

Rule

(1)


If AHP.BL.locationIndicatorICAO is not null, then ignore this branch.

(2)


Insert here the type of the airport decoded as follows

AHP.BL.type

Text to be inserted in Item E

AD or AH

"AD"

HP

"Heliport"

LS or OTHER

"Landing site"

(3)

airport name

(a) If AHP.BL.name is not null, then insert it here. (b) Otherwise, insert here the text "located at" followed by the AHP.BL.ARP.ElevatedPoint decoded according to the text NOTAM production rules for aixm:Point

(4)apron nameFor the potential applications/implementations - the word "Apron" may appear twice depending on the coded APN.BL.name (e.g. Apron MILITARY APRON or Apron APRON A1). Caution shall be exercised for NOTAM production to avoid possible duplications.
(5)location and extent descriptionInsert here the APE.BL.annotation note with propertyName="extent" and purpose='DESCRIPTION' translated into free text according to the decoding rules for annotations. 
(6)

conditional for

closed, except for

prohibited for

additionally allowed for

Insert here APE.BL.availability.ApronAreaAvailability.usage.ApronAreaUsage.type as follows:

typeText to be inserted in item E
"CONDITIONAL""available for"
"RESERV""closed, except for"
"PERMIT""now available for"
"FORBID""prohibited for"

(7)

flight

Decode here each FlightCharacteristics property that was specified, as detailed below. If more than one FlightCharacteristics property was used, insert blanks between consecutive properties.

FlightCharacteristics.type*

Text to be inserted in Item E

OAT

"Operational Air Traffic"

GAT

"General Air Traffic"

ALL

"Operational Air Traffic/General Air Traffic"

OTHER:MY_TEXT

"my text" (replace "_" with blanks)

*Note: type is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

FlightCharacteristics.rule

Text to be inserted in Item E

IFR

"IFR"

VFR

"VFR"

ALL*

"IFR/VFR"

OTHER:MY_TEXT

"my text" (replace "_" with blanks)

*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

FlightCharacteristics.status

Text to be inserted in Item E

HEAD

"Head of State"

STATE

"State acft"

HUM

"HUM"

HOSP

"HOSP"

SAR

"SAR”

EMERGENCY

"EMERG"

ALL

"State acft/HUM/HOSP/SAR/EMERG"

OTHER:MEDEVAC

“MEDEVAC”

OTHER:FIRE_FIGHTING

“fire fighting”

OTHER:MY_TEXT

"my text" (replace "_" with blanks and convert to lowercase)

FlightCharacteristics.military

Text to be inserted in Item E

MIL

"MIL acft"

CIVIL

"civil acft"

ALL*

"civil/MIL acft"

OTHER:MY_TEXT*

"my text" (replace "_" with blanks)

*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

FlightCharacteristics.origin

Text to be inserted in Item E

NTL

"domestic"

INTL

"intl"

HOME_BASED

"home based"

ALL*

"domestic/intl"

OTHER:MY_TEXT*

"my text" (replace "_" with blanks)

*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

FlightCharacteristics.purpose

Text to be inserted in Item E

SCHEDULED

"scheduled"

NON_SCHEDULED

"not scheduled"

PRIVATE*

"private"

AIR_TRAINING

"training"

AIR_WORK*

"aerial work"

PARTICIPANT

"participating acft"

ALL*

"scheduled/not scheduled/private/training/aerial work/participating acft"

OTHER:MY_TEXT*

"my text" (replace "_" with blanks)

*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

(8)

aircraft

Decode here each AircraftCharacteristics property that was specified, as detailed below. If more than one AircraftCharacteristics property was used, insert blanks between consecutive properties.

AircraftCharacteristics.type

Text to be inserted in Item E

LANDPLANE

"landplanes"

SEAPLANE*

"seaplanes"

AMPHIBIAN

"amphibians"

HELICOPTER

"hel"

GYROCOPTER

"gyrocopters"

TILT_WING

"tilt wing acft"

STOL

"short take-off and landing acft"

GLIDER*

"gliders"

HANGGLIDER*

"hang-gliders"

PARAGLIDER*

"paragliders"

ULTRA_LIGHT*

"ultra lights"

BALLOON*

"balloons"

UAV*

"unmanned acft”

ALL*

"all acft types"

OTHER:MY_TEXT

"my text" (replace "_" with blanks)

*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

AircraftCharacteristics.engine

Text to be inserted in Item E

JET

"jet acft"

PISTON

"piston acft"

TURBOPROP

"turboprop acft"

ELECTRIC**

“electric engine acft”

ALL

"all engine types"

OTHER:MY_TEXT

"my text" (replace "_" with blanks)

**Note: new in AIXM 5.1.1.

AircraftCharacteristics.wingSpan - insert the value followed by the value of the uom attribute. Prefix with the value of AircraftCharacteristics.wingSpanInterpretation, decoded as indicated in the following table:

AircraftCharacteristics.wingSpanInterpretation

Text to be inserted in Item E

ABOVE

"acft with wingspan more than"

AT_OR_ABOVE

"acft with wingspan equal to or more than"

AT_OR_BELOW

“acft with wingspan equal to or less than"

BELOW

"acft with wingspan less than"

OTHER:MY_TEXT*

"my text" (replace "_" with blanks)

*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

AircraftCharacteristics.weight - insert the value followed by the value of the uom attribute. Prefix with the value of AircraftCharacteristics.weightInterpretation, decoded as indicated in the following table:

AircraftCharacteristics.weightInterpretation

Text to be inserted in Item E

ABOVE

"acft mass heavier than"

AT_OR_ABOVE

"acft mass equal to or heavier than"

AT_OR_BELOW

"acft mass equal to or lighter than"

BELOW

"acft mass lighter than"

OTHER:MY_TEXT*

"my text" (replace "_" with blanks)

*Note: value is unlikely to be used in a NOTAM, its decoding is provided for completeness sake.

(9)


If there exists a parent APE.BL.availability.ApronAreaAvailability.usage.ApronAreaUsage.selection.ConditionCombination with logicalOperator='OR' (there are more than one flight/aircraft combinations that are excepted), then select and decode each child subCondition.ConditionCombination/... consecutively and insert the comma separator.

(10)

PPR time

PPR details

If APE.BL.usage.priorPermission is not NIL, then insert here the decoding of the PPR information as detailed in the following diagram:

EBNF Code 
template_PPR = "." "PPR " "APE.BL.usage.priorPermission(10.1)" ["." "APE.BL.usage.annotation(10.2)"].

Reference

Rule

(10.1)

Insert here the value of the priorPermission attribute followed by the value of the @uom attribute decoded as follows:

uom value

Text to be inserted in Item E

HR

"HR"

MIN

"min"

SEC

"sec"

OTHER:MY_TEXT

"my text" (replace "_" with blanks and convert to lowercase)

(10.2)

Decode here the annotation with propertyName='priorPermission' and purpose='REMARK', according to the decoding rules for annotations.

(11)reasonIf there exists a APE.BL.availability.annotation having propertyName='operationalStatus' and purpose='REMARK', then translate it into free text according to the decoding rules for annotations.

(12)

note

Annotations of APE.BL.ApronAreaAvailability shall be translated into free text according to the decoding rules for annotations.

Note: The objective is to full automatic generation, without human intervention. However, the implementers of the specification might consider reducing the cost of a fully automated generation by allowing the operator to fine-tune the text in order to improve its readability (with the inherent risk for human error, when re-typing is allowed).

Items F & G

Leave empty.

Event Update

The eventual update of this type of event shall be encoded following the general rules for Event update or cancellation, which provide instructions for all NOTAM fields, except for item E and the condition part of the Q code, in the case of a NOTAMC

If a NOTAMC is produced, then the 4th and 5th letters (the "condition") of the Q code shall be "AK", except for the situation of a “new NOTAM to follow, in which case “XX” shall be used.

The following pattern should be used for automatically generating the E field text from the AIXM data

EBNF Code 
template_cancel = ["(1)" "AHP.BL.type (2)" ("AHP.BL.name (3a)" | "AHP.BL.ARP (3b)")  ] "apron" "APN.BL.name" ("resumed normal operations." | " : New NOTAM to follow.(13)").

Reference

Rule

(13)

If the NOTAM will be followed by a new NOTAM concerning the same situation, then the operator shall have the possibility to choose the "New NOTAM to follow" branch.  This branch cannot be selected automatically because this information is only known by the operator.

Note: in this case, the 4th and 5th letters of the Q code shall also be changed into “XX”. 

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