Class D shall be derived from class C, C from B and B from A:
D --derived--> C --derived--> B --derived--> A
An object d from class D can be element of the Root EP Collections of all, of some or of none of these classes. This is simply mapped by a bit sequence
whereas values { 0, 1 } have the following meaning:
| Value | Meaning |
|---|---|
| 0 | do NOT insert into collection |
| 1 | object will be element of the according collection |