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Glossary - D

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data application

The industry-endorsed processing laws that apply to ATPCO data for itinerary pricing solutions. Data Application creates an industry standard aligning ATPCO, data providers, and data subscribers for consistent industry-wide itinerary pricing.


Database Management System.

data collection

The quadrant in the life cycle of a fare where airlines send fare and rule data to ATPCO.

data distribution

The quadrant in the life cycle of a fare where ATPCO sends all fare data to all the major pricing systems, online travel agents, other vendors that sell tickets to travelers, and governments.

Data Distribution (G30)

Directory that controls which organizations (subscribers) receive what public and private data from ATPCO for processing.

data owner

The carrier who owns the fare products.

data provider

The organization that contracts with ATPCO to file fares, rules, and other data in its own files under its own control.

data table

A table used to house rule provisions in the FareManager Rules system. See also Record 3.

data table set

A series of data tables within the string between a THEN data table to the next THEN data table or ELSE data table.

data table subset

A series of data tables in a string that can stand alone to validate the fare component. Generally this is equal to one Record 3 table when tables are strung with OR. It can also be a group of tables which constitute a unit of thought when there is an AND relational indicator. Subsets include the following situations:

THEN (when the next table is OR and there is no 'If' condition)



data table string

A series of 1 to 200 data table numbers and the relational indicators contained on the recurring segment of the Record 2.

data warehouse

A separate database dedicated to decision support. Data is transferred from transaction processing systems and integrated. It is arranged by customer, not date or transaction. It provides management information through report writers, query tools, data access and retrieval tools, OLAP servers, and enterprise information systems. It is a software architecture, not a product.

date logic

The programmatic handling of effective and discontinue dates on records as mandated by the business rules of a product (such as whether a product permits or does not permit date gaps or prevents date overlaps).


Departure control system.

decision support

See fare management.

departure control system

An airline IT application that manages Check-In/Boarding and Load Control for airlines at airport locations. Checked baggage, optional services, reissues, refunds, and even fare/rule data are instances where ATPCO data is used in these applications.


Ultimate stopping place of the journey as shown on the ticket. When the word destination is used in a fare rule, general rule, or Rule 2, it will be necessary to determine the carrier's own definition.


Directory system.

direct connect

See direct channel.

direct channel

The process of pricing and booking tickets within an airline's own internal environment, without using pricing systems or other intermediated industry data. This is most commonly handled through a carrier's Web site, but may also be done via a call center or at airport/city ticket offices.

direct flight

Any service of transportation with a single flight number making no, one, or multiple intermediate stops, including change of gauge/funnel and nonstop flights.

directional fare

Fares that are published with a directional indicator (either on the fare record or footnote). Directional fares are usually international. See inbound and outbound.

directional indicator

A tag that determines the true origin and destination of a fare or application of supporting text. This allows data to be stored most efficiently and displays the data in its true order (from point A to point B or vice versa).

directional market

Two cities on a travel itinerary (city pairs).


A tag used on the Record 1 or 2 to indicate that that Record 3 provision applies in a certain direction only.

directionality tag 1

A tag used on the Record 1 or 2 to indicate that the Record 3 provision applies from Location 1 to Location 2.

directionality tag 2

A tag used on the Record 1 or 2 to indicate that the Record 3 provision applies from Location 2 to Location 1.

directionality tag 3

A tag used on the Record 1 or 2 to indicate that the Record 3 provision applies for travel originating in Location 1.

directionality tag 4

A tag used on the Record 1 or 2 to indicate that the Record 3 provision applies for travel originating in Location 2.


The computer system of reference data in common to nearly all areas of the company. Some examples are carrier, city, and country names and codes (found in the G level of the directory); fare classes (found in the P level of the directory); and rate types (found in the C level of the directory).

discontinue date

The last date on which a segment is in effect.

discounted passenger

The passenger travelling at a discounted fare that requires another full-fare passenger. Also referred to as accompanied passenger.


Data Interchange Standards Handbook, the definitive guide of file standards and specifications for the BSP HOT file.


Travel within a sovereign state or within a single country.

domestic US/CA fares

Fares published within the United States, within Canada, or between the United States and Canada. Includes travel between US Virgin Islands and Puerto Rico and US/CA. Also called local fares.


Department Of Transportation. A division of the US federal government that has governed and regulated the Airline Industry since absorbing the CAB on 1 January 1985. It regulates all international and US/CA fares and cargo rates.


Data Subscriber Notice.