You are here

Glossary - I

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

International Air Transportation Association.


International Civil Aviation Organization (pronounced "eye-KAY-oh"). A United Nations body that regulates the technical and safety aspects of commercial aviation worldwide. They are headquartered in Montreal.


Interline Data Exchange Centre. This service was discontinued in 2012.


Integrated Database Management System.

inbound travel
  1. (non-directional fares) All fare components within the pricing unit that occur after the point of turnaround (after the furthest geographical fare break point.)
  2. (directional fares) All fare components within the pricing unit that are selected in the opposite direction of the passenger's travel.

Portion of a query to gather records that meet certain criteria. Results give you a current picture of your database.

inclusive table

A table used to identify specific items (such as countries, cities, fare classes, and rule numbers) that will produce an identical action or result.


A type of batch status indicating that data contained within the batch has not been distributed in the subscription process. See also batch status.

indirect channel

The process of pricing and booking tickets via a third-party intermediary, usually a travel agency or travel management company. These processes rely on industry intermediated schedule and fare data to run, and constitute the majority of bookings worldwide.

Industry Sales Record

A daily process that takes the three different sales data formats (TCN 4.05, ARC CAT, and BSP HOT V20) and combines them into a single data feed.


Infant without a seat (usually under age 2).


A viewing facility that allows the display of records in the database file without updating. A carrier using this facility can view all its own records and the public records of all other carriers. An ATPCO analyst can view all records of all carriers.


Infant occupying a seat (usually under age 2).


The written description and justification to ATPCO from a publishing carrier describing desired changes to a fare rule, add-on, footnote, routing, or to any other product. See also filing advice.


A ticketed reservation that involves multiple carriers. Used in conjunction with other words such as interline itinerary, interline reservation, or interline point.

Interline transfer

(data application) The transfer of services from one carrier to a different carrier, can include transferring between the services of the primary carrier to another carrier.

intermediate point

A ticketed point between the terminal points of the fare component.

internal table

See supporting table.


Travel between any two or more sovereign states.

International Air Transportation Association

The trade and lobby association with the purpose of improving commercial airlines throughout the world. The group, headquartered in Geneva, lobbies government bodies on behalf of its members, provides standards for safety, communications, and messaging, and helps coordinate pricing and settlement. This includes the issuance of two-letter airline codes, three-letter airport/city codes, and resolutions regarding pricing. The members meet to establish prices for international carriage; the DOT grants (or refuses to grant) antitrust immunity on each agreement. ATPCO and IATA partner on a number of products, including Baggage, RBDs, AIA, PMP, and PAT. Pronounced "eye-AH-tah."

international fares

Fares involving travel between two or more sovereign states, or travel within a sovereign state other than US/CA and between the United States or Canada (including ATPCO AllFares data).

international tariff

A tariff whose geographic application is other than within or between the United States and Canada. This term is mostly used for tariffs to/from US/CA. AllFares tariffs are also international, but that term is used only for travel that does not include US/CA.


The transferring from different flights services on the same carrier, or the transferring of services on the primary carrier only.


A count of the number of seats a carrier has available for sale at any given time for any given flight. Inventory messaging occurs directly between carriers and the GDSs and is connected to the fare and rule data via ATPCO's RBD product. Airlines manage inventory databases with yield management systems. Fare quotation systems query inventory databases directly for up to date availability information for use in pricing.


Integrated Services Digital Network.


Industry Sales Record. See Sales Data Exchange.


All points of planned travel. Also called journey.