User-Agent Header?

Section 4.1.3 ...

The mechanism by which a proxy recognizes the user agent as a Web
browser should use evidence from the HTTP request, in particular the
User-Agent and Accept headers.

Please clarify -- is this just the *existence* of those headers, or
the specific values?  If it is the specific values, then please
provide some guidance (or a normative alternative) that new user
agents can use, before their names propagate to various whitelists.


Received on Wednesday, 6 August 2008 01:16:17 UTC