theory - What is the name of the relation that the attribute have to the class that contains it?

Question

Theoreticaly speaking, if class A has an atribute B, B is an attribute of A, but A is what of B?

question from:https://stackoverflow.com/questions/65876474/what-is-the-name-of-the-relation-that-the-attribute-have-to-the-class-that-conta

Answer 1

Waitting for answers