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describes dynamic classification in his book
(Chapter 6, Multiple and Dynamic Classification).
dynamic classification is useful for conceptual modelling
Fowler supplies an example:
Hm, I agree with the largest part of Fowlers' book, but dynamic classification is sheer nonsense to me. In addition I find the example of a person's job rather weak.
Yes, a person-manager
could be modelled as specialisation.
Association or Specialisation?Fine, no dynamic classification for me. But what to use, an association or specialisation? And what makes the difference?
Fowler mentions these confusing meanings of "is" in
chapter 6, section
As an alternative he offers a question such as
That questions remains vague too, does not clearly distinct association from specialisation.
Distinction question: Is cardinality meaningful?Idea: Look whether cardinality could apply. For example: