Database Reference
In-Depth Information
Concept Template
Who? What? When?
Where?
Why? How?
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To complete this template, list up to five concepts under each of these questions. Recall
our earlier explanation of each entity category, which can help us complete each of the
columns:
Category
Definition
Examples
Person or organization of interest to the enterprise. That is, “ Who is
important to the business?” Often a Who is associated with a role such
as Customer or Vendor.
Employee, Patient, Player, Sus-
pect, Customer, Vendor, Student,
Passenger, Competitor, Author
Who
Product or service of interest to the enterprise. It often refers to what
the organization makes that keeps it in business. That is, “ What is im-
portant to the business?”
Product, Service, Raw Material,
Finished Good, Course, Song, Pho-
tograph, Title
What
Calendar or time interval of interest to the enterprise. That is, “ When
is the business in operation?”
Time, Date, Month, Quarter, Year,
Semester, Fiscal Period, Minute
When
Location of interest to the enterprise. Location can refer to actual
places as well as electronic places. That is, “ Where is business con-
ducted?”
Mailing Address, Distribution
Point, Website URL, IP Address
Where
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