Contour 4.2(b) implies that to own certain collection of cases of Professional and you will Opportunity, there can be just one associated instance of Laptop computer; for certain collection of instances of Professional and you will Computer, there was one relevant exemplory case of Project; and certain pair of cases of Investment and you can Notebook, there’s just one instance of Professional. Overall, we all know because of the the definition of ternary matchmaking that if a good dating among three agencies can only become conveyed by a functional dependence between the points of the many about three entities, then it can’t be conveyed using only digital relationship, and this merely apply at associations anywhere between a couple entities.