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Glossary - A

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accompanied passenger

The passenger travelling at the fare being validated who is required to travel with another passenger.

accompanying passenger

The passenger who is travelling with the passenger on the fare being validated.

accountable document

A sold passenger document, such as a ticket or a Miscellaneous Charges Order.

account code

A unique code assigned by each carrier that identifies a particular fare programs contracted with a company for that carrier. Carriers may have multiple account codes for a single company.


Airlines Clearing House, an airline-owned corporation that provides a facility for clearing and settling billings arising from the sale of interline passenger and freight transportation; transportation-related goods and services provided by one airline to another such as maintenance, ground handling, catering, rentals, among other things; and charges arising from Universal Air Travel Plan transactions (a mutual airline industry charge program under which participating airlines issue UATP cards that cardholders may use to pay for airline tickets and other travel services).

action code

A code in the Fares system that indicate the type of change that is being applied to a transaction within a fares batch.


An amount used only with specified/published international fares for the construction of constructed/ unpublished international fares. (Also referred to as an arbitrary or proportional fare.)

add-on category

Category 105, used to define the rule conditions for the constructing of unpublished (constructed) fares. Not used by the ATPCO automated fare construction process.

add-on zone

A component of an add-on record that defines the geographic area of the published fare with which the add-on will construct. Applies to international fares only. 


Administration Mailing.


Administration Page; used in billing.


Application Development System.


Application Development System Online.


A person who has reached his or her twelfth birthday as of the date of commencement of travel.

advanced subscriptions

The tariff subscriber receives tariff pages in loose-leaf form by mail or overnight delivery as soon as changes are made and tariff pages are printed and filed. This process occurs daily.


One who acts for or represents another. ATPCO is a legal agent authorized to make filings and distribute data on behalf of designated carriers.


ATA & IATA Reservations Interline Message Procedures – Passenger.

all adds

A complete copy of an ATPCO data subscription product that is used by subscribers to initialize their database before processing changes or updates. All adds contains both effective and future effective data.


A unit of data that contains worldwide international and domestic fares, add-ons, footnotes, rules, and routing data, but does not include travel to or from Canadian or US markets.

alternate governing rule

A governing rule that applies only when specifically invoked by the fare rule. Alternate governing rules are not referenced in the Record 0. Also called alternate general rule.


See alternate governing rule.

amendment to application

Any change made to an SPA/STPA after the application has been sent to the DOT/CTA but before it is actioned.


A small application that performs one specific task, typically running under the control of a larger application, such as a Web browser.

application number

A number assigned by the EFS to an SPA/STPA when it is sent to the DOT/CTA.

approval number

A number assigned by a government that indicates the government's approval of an SPA/STPA.


The fares (or rates) that may be combined with an international fare (or rate) published to a gateway to create a through-fare. Arbitraries may not be sold separately for travel and are usually published between points within the same country. Also referred to as add-ons or proportionals.

arbitrary bucket

The text that defines fare class combinability. Arbitrary buckets may be fare class specific, generic (such as A***** and B*****), or default (******). The default bucket is often referred to as the negative or six-star bucket.

arbitrary zone

Applicable to international tariffs only, a zone is a component of an add-on record that defines the geographic area of the published fare with which the add-on will construct.


Airlines Reporting Corporation; entity responsible for managing travel agency ticketing, reporting, and settlement for US travel agency sales.


IATA divides the world into three areas, also referred to as Traffic Conferences (TC):

  • Area 1: Western Hemisphere
  • Area 2: Europe, Africa, Middle East
  • Area 3: Asia, Pacific

Aeronautical Radio Incorporated.


Auto Rental Rates System identifier. This IDMS system contains rate and other information for the car rental industry. The car rental companies enter data into the online system. These changes are then transmitted for inclusion into fare quote systems.


American Standard Code for Information Interchange.

assembly point

A point in the itinerary where the entire qualifying group assembles and commences transportation as a group.


Available Seat Kilometers; an industry measure of capacity, calculated by multiplying the total number of seats by the distance of the flight.


Air Traffic Conference.


Anti-Trust Immunity. Allows two or more carriers to coordinate fares, pricing strategy, schedules, and other business and operational aspects, and permits airlines to share revenue. This requires explicit approval from governments to implement.


Airline Tariff Publishing Company. A corporation owned by various airlines formed to serve as agent for those owners (and for other airlines or vendors) to file and publish tariffs and related products.

authorizing airline

A ZED/MIBA member through which employee discount travel benefits are derived. Unless there is an agreement for a third party to issue ZED/MIBA tickets, this is the airline that does the ticketing and, therefore, does the pricing of ZED/MIBA fares.

Automated Refunds

ATPCO Automated Rules Category 33 that automates the processing of rules and restrictions governing refunds for tickets.

Automated Reissues

ATPCO Automated Rules Category 31 that automates the processing of rules and restrictions governing exchanges for tickets.

Automated Rules system

The only worldwide database of automated passenger fare conditions, this system permits inquiry and maintenance of the rules and conditions that must be met for a passenger to quality for a particular ticket price. It can contain data applying to any fare class in any market via a particular tariff, carrier, or rule. It can also contain data applying to a specific fare class or fare class type, a specific market, or a fare class plus a specific market. There are three automated products in this system: Bits and Bytes, Full Text format, and Abbreviated Text format. Obs; now the FareManager Rules system.

automated ticket machine

Ticketing kiosk machine.


An automated process used to price a ticket without human intervention, autopricing is the ability for a GDS to provide eligible fares for a passenger’s itinerary by programmatically processing the data coded in the rules and footnotes.


The amount of inventory which is not currently reserved is shown in an availability display.