[Standards] Re: Proposed XMPP Extension: Gateway Relayed Encryption

Specifying the format of a feature like this doesn't seem useful to me. The specific ones will still need to be registered and maybe they'll use this pattern (it's often useful if they do) but I see no reason to require it. In general it seems like this XEP basically says "other XEPs may exist that define formatters and encrypters, if you implement them then do what they say to do" ? So it's essentially a prologue to each of these other XEPs? And those other XEPs are effectively expected to specify an entire external messaging protocol as a XEP?