Zero-dimensional entity class

[Mastomaki]

What is zero-dimensional entity class? A normal object class would be one-dimensional?

[soininen]

Zero-dimensional entity classes correspond to object classes in the legacy parlance. 1-dimensional entity classes are relationship classes with single object class dimension.

[Mastomaki]

1-dimensional entity classes select a subset of an underlying object class?

[soininen]

Yes.

[nnhjy]

Are we going to keep the two existences of the legacy object classes? They sometimes cause confusion.

[jkiviluo]

Where do we still use object classes?