Mark Nottingham

@annevk? Seems like it's something that could be polyfilled...

Thanks, @annevk. Will close this as indicated.

Thanks!

I think this would require some sort of "all" value (`*`?) in `Variant-Key`; if we had that, it should be fairly straightforward, I _think_.

I think the basic use case here is "a request with a cookie named X whose value matches Y can use this response," where `X` is nominated in the Variants...

Yes, that was from a previous syntax - thanks for the reminder.

See proposal roughed in above; @jyasskin I'm curious to know if this seems sensible to you.

Yes. It might be worth mentioning that other redirects work too.

Yes, IANA can be instructed to do that in IANA Considerations.

Stepping back, I see two aspects to this issue: a. Whether there should be differences in the producer and consumer grammars, and b. If so, how to document them. It...