Slide 3 of 14
Notes:
Generally, we’d like the default behavior to be what makes most sense for a down-level client, because a down-level client can’t get any other behavior than this. (Sometimes other considerations forced us to compromise this aim.)
There is always a way for a reference-aware client to get the non-default behavior. (In most cases, by using the No-Passthrough header, which causes the method to be applied to the reference.)