In one way link, from A -> Z
;
If we fetch A
then we will get Z
If we fetch Z
then we will not get A
correct?
Two way link, from A <-> Z
;
If we fetch A
then we will get Z
If we fetch Z
then we will get A
correct?
TL;DR
When using a two-way link between two documents, if we fetch Document A, we will also get Document Z. Similarly, if we fetch Document Z, we will get Document A. This is not the case for a one-way link, where only the linked document will be fetched.