Supertypes
Let’s learn about supertypes.
We'll cover the following...
Supertypes by generalization
We illustrate generalization with the example model shown below:
After we add the object type Employee we can see that Employee and Author share a number of attributes. For example, employees and authors are both people, and these are also roles played by people. So, we may generalize these two object types with a joint supertype Person, as shown in the diagram below:
Generalizing two or more objects
When we ...