Config : Link ???

Link : For creating relationship between Two BC.(1:m / m:1)
for Maintaining M:M relationship , two links require.
Property :
1.cascade Delete :
None : no action
Clear : Clear foreign Key
Delete : Delete
2.No Delete :
3.No insert:
4.No associate :
5.Visibility Rule Applied (Never Always) : Visibility rule of child bc will not applied.
6.Visibility type :