Suppose a radio station wants to have a database of classical music recordings
for use by the program director and announcers. The station needs this
information to plan a schedule of broadcasts, to maintain a log of what
is played, and to publish a monthly listener guide. Here is some of the
information that will be needed:
Album title, price, and duration
Recording company and date recorded
Selection titles and duration
Names of orchestra, conductor, singers, accompanists
Composer's names and other personal information
Date, time, and announcer for selections played
We will call these items attributes. They tend to fall into different
categories. Some pertain to albums, some to specific selections, and others
relate to when the selection is played. Before the database can be
created, the attributes must be organized into logical entities.
