The rest of my project was designed without hypermedia in mind. So association between entity is done via database unique id.
For example, an association is done via a
post /api/user/1/address/1
Whereas I think SDR wants me to do
post /api/user/1/address Content-Type:text/uri-list/api/address/1
But the problem is that I don't have URI for my old entity so I have to rewrite most of the project. Or don't use SDR. But I want to use SDR because going forward it saves me a lot of boiler plate code for new entity where they just need simple CRUD.