Usage of `related` field in Relationships link

[quote=“ethanresnick, post:8, topic:145”]
Note: For a discussion of the differences between the “self” and “related” links of a relationship object, since I don’t think it came up in the earlier discussion, see here.[/quote]

Now I’m confused.
You say that the self link http://examples.com/bands/1/relationships/drummer can contain data like relationships, attributes and links.
However, in the link you provided Relation Link Usage it is said that this should not be included. Instead it should only be included resource identifier objects (only type and id.

What is correct now?

If your version is correct then self link and related link would more or less return the same content?