Object-to-object Connection Types

Object connections can be of the following types:

A "many-to many" connection type. For example, a many-to-many connection type between a person and a company implies that any number of persons can be connected to a company, and conversely, any number of companies can be connected to a person.
A "one-to-many" connection type. For example, the standard “Employer-Employee” type in Vine is a one-to-many connection type. It permits a company to be connected to any number of persons, but a person can be connected to only one company.
A "one-to-one" connection type. For example, such a type between a person and a company permits a person to be connected to only one company and vice versa, a company can be connected to only one person.