Most connections can be created only once between two objects. However, there are connections that can be drawn multiple times between two objects. This enables you to represent real situations in companies.
To identify multiple connections of the same type between two objects, the connection receives the placed attribute Connection role in the model.
Example
An entity type is connected to an object of the Relationship type via two connections of the defines type. This is to show that a superior part can consist of multiple, subordinate parts, and that a subordinate part can be used as a component in multiple superior parts.