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Glossary for the airline industry

From A-Z, this glossary covers definitions and explanations for common airline industry terminology.


Airlines for America.

accompanying passenger

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

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An amount used only with specified/published international fares for the construction of constructed/ unpublished international fares.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Category 105, used to define the rule conditions for the constructing of unpublished (constructed) fares.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.

adjusted pricing

A method of dynamic pricing where a dynamic pricing engine uses an airline’s unique business logic to apply dynamic price adjustments to predefined prices.


Agency debit memo; a notice from an airline to a travel agency that an error in remittance has occurred and money is owed.


A person who has reached their twelfth birthday as of the date of commencement of travel.


An entity that collects related items of content and displays them or links them together.


Artificial intelligence.

Airline Catalogue

A type of Product Catalogue, the Airline Catalogue aims to be used for an airline’s own purpose (such as offer creation) and means a list of products and services or items that might be offered by that airline. The depth of detail provided in the catalogue, depends on each individual airline’s requirements, and use cases. Also known as the Airline’s Own Product Catalogue. 

Airline Profile

A type of Product Catalogue, the Airline Profile aims to support the airline retailer to manage the volume and types of requests they receive by filtering out the queries that cannot be fulfilled and means the information that a Seller requests from an Airline on a periodic basis about the products and services, or about that Airline.

airline-defined tax

Tax codes that are specified by the airline and not assigned by IATA TTBS. 


A piece of standards work that involves a change in processing by at least one of the consumers of the standard.

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.


See alternate governing rule.

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.