implement [SIREN](https://github.com/kevinswiber/siren), see [Achelous](https://github.com/toddsby/achelous) [HATEOAS SIREN](http://hyperschema.org/mediatypes/siren) ref [SIREN google group](https://groups.google.com/forum/#!forum/siren-hypermedia) ``` js let header = 'Content-Type: application/vnd.siren+json'; ```
implement SIREN, see Achelous
HATEOAS SIREN ref SIREN google group