Great circle miles.

Global distribution system.

Restrictions that apply to all fares; consequently, they are separate from the individual fare rules. When a general rule does not apply to a fare, the non-applicability is included in the fare rule. Also called governing rule.

Printed tariff pages that are published as legal documents for the governments of Canada and the United States.

ATPCO's Government Filing System. An automated system used by ATPCO that combines fare and rule data and electronically files carrier changes to corresponding governments or for carriers to display or distribute. The changes can consist of fares, add-ons, footnotes, routings, and rules.

A network system that enables transactions between travel industry service providers such as airlines, hotels, car rental companies, and travel agencies.

The name for the test environment where customers can use real data to familiarize themselves with new interfaces and test changing subscription files to ensure pricing will occur correctly in an updated system.

See general rule.

A filed published or private fare (the amount shown in the Base Fare Box of the passenger coupon). Also called ticketed fare amount.

The amount reported to the carrier by the agent, including any commissions to be deducted through the ARC/BSP return.

Graphical user interface.

1. (US/CA fares) Half of a round-trip fare. A one-way fare is never considered a half-round-trip fare. See also combinations.

2. (International fares) Half of a round-trip (Tag 2) fare or a one-way (Tag 1) fare doubled and halved. Half of a specified/published or constructed/unpublished round trip normal or special fare. Additionally, the one-way normal may be considered to be a half-round-trip normal fare. If a one-way special fare may be doubled to establish a round-trip special fare, the one-way special fare may be considered to be a half-round-trip special fare. A one-way Tag 1 fare doubled and halved may be considered to be a half-round trip-fare, but it is never considered to be a Tag 2 fare. A half-round-trip fare is never a one-way (Tag 3) fare that cannot be doubled. See also combinations.

The city that appears first in a market city pair. Also called origin city.

A geographic point where a non-ticketed intermediate stop has occurred.

A city between the origin and destination of the through international fare component that has a higher fare.

Higher intermediate point.

1. O, Origin - Intermediate. The HIP application applies from the origin of the fare component to any ticketed point(s) within the fare component being assessed. 2. D, Intermediate - Destination. The HIP application applies from a ticketed point to the fare component destination of the fare component being assessed. 3. I, Intermediate - Intermediate. The HIP application applies between any two ticketed points within the fare component being assessed.

Hand-off tape; file of accountable transactions sent from the BSP to participating airlines. Generally, a HOT is structured by validating carrier, per country, per billing period, per currency, and per agency.

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.