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Back to the Conceptual Data Model.
PURPOSE OF THESE FACTS :-
These FACTS define the functional requirements which the Database must meet.
They form the basis for agreement between the User and the Database Designer and are
written in a form of structured English which is clear and unambiguous.
The Draft FACTS have been defined and are detailed here ...
A. The Area being Modelled is :-
An Airline Booking System.
B. The Things of Interest, ('THINGS'), include :-
B.1 Aircraft
B.2 Aircraft Types
B.3 Destinations
B.4 Flights
B.5 Itineraries
B.6 Legs in a Flight
B.7 Passengers
B.8 Passenger Bookings
B.9 Seats
B.10 Tickets
B.11 Ticket Types
B.12 Travel Class
C. How are these THINGS_OF_INTEREST related ?
C.1 A PASSENGER can have zero or many BOOKINGS.
c.2 A BOOKING can be for one and only one PASSENGER.
c.3 A GROUP_BOOKING can be for one or many PASSENGERS.
E. Sample Data includes :-
E.1 To be determined
F. Typical Enquiries include :-
F.1 Do we have two Seats together for Australia ?
F.2 Show status report of all flights for one day and the avaibility of each seat, on each flight.
F.3 Show a flight report that can be printed out for a single flight that shows passenger name,
type of fares and totals for each class of travel.
Barry Williams
Principal Consultant
Database Answers
19th. May 2001
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