Reviewer: Carlos Martinez Review result: Ready With the caveat that I'm not an expert in the subject matter, I have found this document well-written and easy to read. I believe it is ready to move forward. A minor nit, in the IANA considerations section: | In addition to the actions below, IANA should terminate the Link | Relation Application Data Registry, as it has not been used, and | future use is not anticipated. I believe this rather important requirement for IANA is somewhat lost in the different sections. It should probably have it's own 4.x section. Thanks Carlos