You are here

Glossary - M

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
main category

A description of the category of the rule that controls the requirement. See also qualifying category.

major subcategory

One of four main subcategories of Category 10 (101-104) that states provisions for specific combination types. See circle trip, end-on-end, open jaw, and round trip.

marketing carrier

The carrier code that will appear on the flight coupon of the ticket (typically used for codeshare).

market

The city which is the origin or destination point of a journey.

market pair

The origin and destination cities of a journey.

master source

The ATPCO database.

match

The data that is used to determine if the record or table is applicable.

Match criteria

Portion of a query coded to find fares and use that fare amount.

maximum permitted mileage

The maximum number of miles that may be traveled for a fare component without incurring a mileage surcharge.

MCO

Miscellaneous Charges Order. An accountable document that may be issued to cover miscellaneous charges and is used in exchange for the service.

memo

A bound set of pages with a defined set of rates or fares published for the convenience of the user. A whole new memo book periodically replaces the old one to eliminate the necessity to file loose-leaf pages. Memos are not filed with the DOT but may or may not contain rates or fares that are filed with the DOT. Rates or fares in a filed tariff would always supersede those in a memo tariff when differences occur.

merchandise services

An optional service that is not associated to any passenger travel or ticket. Such a service may be priced regardless of whether the customer is holding a passenger ticket. For example, a carrier might offer logo T-shirts for sale, whether or not a ticket exists.

MIBA

Multilateral Interline Business Agreement for airline company business travel.

mileage-based fares

A fare that is not governed by a designated routing map, but instead by a maximum permitted mileage (MPM) restriction.

minimum group size

Minimum number of passengers required to qualify for a fare.

minor subcategory

One of four qualifying subcategories of Category 10 (106-109) that states restrictions on combination types.

MIPS

Millions of instructions per second.

mirror image

(Subcategory 102, International fares) A round-trip pricing unit consisting of two fare components, half of a round trip (Tag 2 fare) using the same Tariff, Carrier, Rule, and Fare class code on both components, and where no differing mileage and/or HIP surcharges exist on the pricing unit.

miscellaneous charges order

A document issued by a carrier or its agents requesting issue of an appropriate passenger ticket and baggage check, or provision of services to the person named in such document.

Modify fares

A function that allows fares to be amended or canceled within a fares batch.

most significant carrier
  1. The carrier whose baggage rules will apply on journeys.
  2. For journeys that are required to follow DOT reservations, it is the first most significant marketing carrier on the journey, as determined by these conditions, and charges for these journeys are applied per direction:
    1. For travel between two or more Tariff Conference areas, the carrier performing carriage on the first sector on the passenger's journey that crosses from one area to another. Exception: TC123 only, the carrier providing carriage on the first sector on the passenger's journey that crosses between TC1 and TC2.
    2. For travel between Tariff Conference sub-areas, the carrier performing carriage on the first sector on the passenger's journey that crosses from one sub-area to another.
    3. For travel within a Tariff Conference sub-area, the carrier performing carriage on the first international sector on the passenger's journey.
  3. For all other journeys, it is the most significant operating carrier for each checked portion, and charges for these journeys are applied per checked portion:
    1. For travel between two or more Tariff Conference areas, the carrier performing carriage on the first sector on the checked portion that crosses from one area to another. Exception: TC123 only, the carrier providing carriage on the first sector on the checked portion that crosses between TC1and TC2.
    2. For travel between Tariff Conference sub-areas, the carrier performing carriage on the first sector on the checked portion that crosses from one sub-area to another.
    3. For travel within a Tariff Conference sub-area, the carrier performing carriage on the first international sector on the checked portion.
    4. For travel within a single country, the first carrier on the checked portion.
MPD

Multi-Purpose Document; an accountable document that may be issued for a specified use (such as Excess Baggage Ticket), or for an unspecified use, to cover miscellaneous charges.

MPM

Maximum permitted mileage.

MSP

Minimum selling price that the fare may be sold for; set by the publishing carrier.

multilateral fare agreement

An agreement between three or more trading partners to either send data or process data in a specified manner.

multi-stop

A service of transportation with a single flight number making two or more intermediate stops.

MVS

Multiple Virtual Storage.