The relationships are identified by the following symbols:
Symbol for relationships for which an occurrence or an implicit connection exists in the current model. This also applies to the relationship between a function (Function column) and an organizational unit (Organizational unit column) in models of the PCD type.
Symbol for assignment relationships (implicit relationships).
Symbol for relationships for which no occurrences exist in the current model and that are not implicit either.
For example, if a connection was created between objects A and B and object B has been deleted, the relationship is displayed when object A is selected. Once a reorganization is carried out, the relationship will be deleted because no more occurrences of it exist in a model.