July 2013
Beginner to intermediate
288 pages
7h 28m
English
Content preview from Data Model PatternsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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3. The Enterprise and Its World
We’ll start the modeling exercise with some entities that can be specified without interviewing anyone. You know that they will be required, no matter what the business.
An enterprise cannot exist without people. Whether an employee, a vendor agent, or the president of a company, a PERSON can be assumed to be a “thing of significance” to most companies. It should be no surprise, therefore, that the PERSON entity will appear on virtually all data models for all companies. Oh, there may be pressure to name it something different, like EMPLOYEE, CUSTOMER, AGENT, or whatever. But ultimately, the thing of significance is a PERSON, and as a modeler, you will save a lot of time by simply putting that entity on the diagram ...
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