Answer to Question 1
The old model started with a retail service experience-a trip to the travel agent, airline office, or airline ticket counter. In the interaction with a service provider, the flight would be booked on a proprietary computer system and a multi-part ticket printed on a specialized printer. Part of the ticket was removed by the agent and sent back to the airline. At the airport, after queuing, the check-in involved the collection of all or part of the ticket, printing a new document-the boarding-pass-and the luggage check-in.
Consider the model as it exists today. Customers use the Internet to locate a suitable ticket. They might use a web service to identify the best deals and an intermediary to make the booking. They might go directly to an airline site. They are then issued with an e-ticket. The e-ticket carries the same information as the paper version-it is just that the information is held in the airline's database. The record contains the date and time of travel, the origin and destination, and the class of travel.
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Answer to Question 2
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