Can Relationship `Links` object hold more than `self` and `related` attributes and do both hold the same URL?

1

After reading the spec it was still a bit unclear for me and it has an additional note:

Note: Additional members may be specified for links objects and link objects in the future.

So I’m assuming that self and related attributes are the only 2 attributes allowed inside Relationship Links. This Question also confirms it.

Then I have still further questions:

Q1: Presence of self and related are XOR? Either one of them can appear in Links but not at the same time, right?

Q2: Are the URL values for both attributes the same for a relationship Link object? Or where is the difference between those?

2

Wrong. Both can appear in the same Links object.

No.

If resource2 appears in a relationship on resource1, then the related URL refers to resource2, and the self URL refers to the relationship between the two resources (i.e. to the associative entity)

3

ah ok. thx for clarifying!