+------------+
            +---------------E1---+    |            |
+---+       |               |    +---R3---+        |          +---+
|src|------R1           +---+             |        E3----O----+dst|
+---+       |           |                 E2-------+          +---+
            +----------R2                 |
                        +-----------------+

R: Replication Function (PRF)
E: Elimination Function (PEF)
O: Ordering Function (POF)