Selection based upon request target

[mnot@…]

​https://svn.tools.ietf.org/svn/wg/httpbis/draft-ietf-httpbis/latest/p2-semantics.html#header.vary says:

The "Vary" header field describes what parts of a request message, aside from the method and request target, might influence the origin server's process for selecting and representing the response. The value consists of either a single asterisk ("*") or a list of header field names (case-insensitive).

"request target" isn't appropriate here; use "effective request URI."

[julian.reschke@…]

Maybe "target resource"?

[mnot@…]

Hmm, it really is the identifier, not the resource, that is "part of the request message."

[julian.reschke@…]

The same applies to the effective request URI...

[mnot@…]

Well, yes, but it's a concrete artefact that can be derived from the request message; a target resource is an ephemeral concept...

[julian.reschke@…]

Maybe "the parts used to select the target resource"? (for the effective request URI, we also consider protocol and host header field)

[mnot@…]

The "Vary" header field describes what parts of a request message, aside from the method, the Host header field and the request target, might influence...

[julian.reschke@…]

From [2294]:

tune "Vary" description (see #488)

[fielding@…]

From [2324]:

Fix a missing comma and clarify that Vary in a response is about this response; updates [2294] which addresses #488