Within the scope of versioning it is possible to successively version models that are linked via assignments or relationships. For the versioning process you can specify the use of assignments and of relationships separately.
Within the selection
If you specify that assignments and relationships are to be included only within the selection, assignments and relationships that exist for the subsequently versioned model are not included in versioning.
The result of this is that these assignments and relationships do not exist when you open the corresponding version of a database using the change list (Version, Open a versioned database).
Include border items
If you specify for assignments and relationships that their border items are to be included, the assignments and relationships existing for the other model are included in versioning.
The result of this is that these assignments and relationships are created during versioning and exist when you open the corresponding version of a database.