Kind

Kind

A «Kind» is construct you are going to use in most of your models. It is used to represent rigid concepts that provide an identity principle for their instances and do not require a relational dependency.

Let's see some examples:

Rules for using kinds:

1. A «Kind» cannot have another «Kind» as its super-type, directly or indirectly.

Because of that rule, the following usages are not allowed:

Common questions:

Q1: If a «Kind» is relationally independent, does that mean we cannot define relations for theses types? A1: No! When we say that a «Kind» is relationally independent, we mean that it does not necessarily require a relation to be defined, like a «Role» does. Here is an example in which a «Kind» has a dependency.

Usage of the «Kind» stereotype in real models: