Fact Typespane of the Business Ruleswindow. If you don’t see the Business Rules
window, choose Database > View > Business Rulesfrom the main menu.
7.Drag the new fact types (they both contain the word “Patient_Drug_Allergy)
onto the drawing surface. The result is shown in Figure 16–5.
The new object type Patient_Drug_Allergy corresponds to the table you created in step
three. The object type uses an external primary reference constraint, which is explained
in section 5.2 of Chapter 5. Figure 16–5 and Figure 16–3 are conceptually equivalent,
but Figure 16–3 is a more natural expression of the facts, and easier to interpret. You
can make Figure 16–5 ...
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