This REST Users guide page contains this link to "Kinvey references" as if it were a formalized data type, but the link just takes you to the general guide for relational data that describes the pattern for simply adding a field for an entity id pointing to another collection. Are "Kinvey references" no longer formal?
I think the link for Kinvey references mentioned on REST Users guide page is incorrect. While reviewing 'User Groups' documentation, I clicked on 'Kinvey references' and it took me to the 'Data Store' documentation. I think the correct link for references is this link. Please go through this link and let me know if it answers your questions.