All, I believe that the Publisher -> Hub part of the protocol should be left out of the "core" spec. The motivation behind it is that many hubs out there (Wordpress, Superfeedr's... etc) have different ways of handling this without affacting much of how the general "idea" of the protocol works. I believe the Section 7.1 should be set as optional, as well as section 7.2. Something like this would work well, according to me : Once a publisher designates a hub he wants to use, he then SHOULD use any of the supported method by this hub to notify new content. 7.1 and 7.2 should certainly be put as an annex/example of how this can be done.
What do you think? Julien
