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Resource Access Control Facility. RACF is the IBM security tool used to protect all mainframe resources from unauthorized use.


Revenue per average seat kilometer. A measure of financial performance for an airline, calculated by dividing total revenue per flight by the ASKs of the flight. In the United States, RASM (revenue per average seat mile) is used.


Revenue Accounting Tax Database. A comprehensive and automated monthly snapshot of all interlineable taxes that provides the carrier with access to the taxes to be used for monthly settlement.


Reservation booking designator. Also called prime booking code or booking code.


The process of analyzing rules and conditions for a new ticket to replace an unused or partially flown ticket.


1. The computerized key information, including rate and fare information used by CRSs during autopricing to validate coded fare information. 2. Structure of the FareManager Rules system that comprises eight different record types. These records serve different functions in the processing of a fare and are accessed singly to be worked on or viewed in the FareManager Rules system.

Record 0 (General Rules)

1. (Convention 2) Identifies the source tariff and general rule to be applied for each category 2. (Convention 3) The valid rule numbers sent out via ATPCO's system.

Record 1

Fare Class Application record. The Record 1 contains all the fare class codes that are coded in a specific tariff, carrier, and rule combination.

Record 2

Category Control record. The Record 2 contains identification fields that match to the fare, Record 1, or Record 8.

Record 3

A data table used to house rule provisions. This record contains the actual coded data that provides the detailed provisions to apply to a fare from a rule or footnote.

Record 4

Renumber Category Control record. This record is used to maintain the current data in Record 2 while it is in the process of being renumbered.

Record 5

Renumber Fare Class Application record. This record is used to maintain the current data in Record 1 while it is in the process of being renumbered.

Record 6

Reservation Booking Designators (RBD) record. This record states any booking code exceptions to the prime booking code using Chart 1 and Chart 2. The Record 6 contains the identification criteria that must be matched to determine the proper booking code exceptions for that fare.

Record 8

Fare By Rule Index record. This record is used to identify the fares that may be used in the fare retrieval process for the Fare By Rule category.

Record layout

An illustration of the data fields and their positions for a particular product.

Recurring segment

A portion of a record that may be repeated. The recurring segment is preceded by a counter indicating how many times the recurring portion occurs. The use of recurring segments results in a variable length depending on the number of the recurring segments that are included in the record.

Relational indicator

The first field to be completed in any category, it indicates the relationship between data tables. The relational indicator for the initial table in any category is THEN. Other relational indicators are AND, OR, IF, ELSE.


A batch action type that creates a batch, sends the results through the validation process, applies the transactions to the database, and makes the batch available for filing (International) or distribution (US/CA).

Remittance amount

The amount received by the airline for the ticket through ARC/BSP.

Reservation booking designator

The prime one- or two-letter code that is used in a CRS/GDS to identify the class of service in which to book a passenger or the fare in an availability display. Also called booking code.