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The system was pursued to develop in order to create synergies between AMR, Marriott, Hilton Hotels Corporation and Budget Rent-A-Car and fully integrate and unify the reservation systems of the companies involved. In 1988 the four large corporations made contracts to complete the system by June 1992 project at a cost of $55 million.
Modern GDSs typically also allow users to book hotel rooms, rental cars, airline tickets as well as other activities and tours. They also provide access to railway reservations and bus reservations in some markets, although these are not always integrated with the main system.
The C4 model relies at this level on existing notations such as Unified Modelling Language (UML), Entity Relation Diagrams (ERD) or diagrams generated by Integrated Development Environments (IDE). For level 1 to 3, the C4 model uses 5 basic diagramming elements: persons, software systems, containers, components and relationships.
Diagrams created to represent attributes as well as entities and relationships may be called entity-attribute-relationship diagrams, rather than entity–relationship models. An ER model is typically implemented as a database. In a simple relational database implementation, each row of a table represents one instance of an entity type, and each ...
The enhanced entity–relationship (EER) model (or extended entity–relationship model) in computer science is a high-level or conceptual data model incorporating extensions to the original entity–relationship (ER) model, used in the design of databases.
Central reservation system may refer to: Airline reservations system, the reservation system used by an airline company; Hotel reservation system, the central reservation system used by the hotel and resort industry; Computer reservation system, another name for the airline reservation systems used by travel agents
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In addition to airlines, the CRS is also used to book train travel, cruises, car rental, ferry reservations, and hotel rooms. Amadeus also provides New Generation departure control systems to airlines. [1] Amadeus IT Group is a transaction processor for the global travel and tourism industry.