link example seems confused

[mcr]

  For resources discovered via CoAP's discovery interface,
  a hosting statement is typically provided by the defaults implied by {{?RFC6690}}
  where a link like `</sensor/temp>` is implied to have the relation "hosts" and the anchor `/`,
  such that a statement "coap://hostname hosts coap://hostname/sensor/temp" is implied in the link.

I don't understand this statement. It feels like something is unstated, or maybe there are 6690 stuff I don't get.

[chrysn]

Link format has default values for both rel and anchor.

If a resource registers its working resource </sensor/temp>, and in addition a generic statement about proxying (that there is a proxy for </>), then all that is needed to make the connection, i.e., that </sensors/temp>;rel=hosts;anchor="/", are already in place due to these defaults, and never need to be written down.

[mcr]

It's the "coap://hostname hosts coap://hostname/sensor/temp" that I'm having problems with.

[chrysn]

It doesn't have any meaning on its own, it's just something 6690 defined. It evokes all kinds of associations, but really it's just a label associating these with each other.