On re-reading the proposal again, I realize that I might have misunderstood
it. The proposal doesn't seem to say whether http: URLs are allowed in IPP
protocol elements (as opposed to HTTP request headers when talking to
a proxy.) On earlier readings I thought it had said that http: would be
allowed.
So it would help to have the proposal explicitly state whether ipp:
URLs (SHOULD|MUST) be used in IPP protocol elements when referring to
printer or job objects, and whether http: URLs (MAY|SHOULD NOT|MUST NOT)
be used. And if http: URLs are going to be allowed at this level,
please explain why they are needed or useful.
thanks,
Keith