Re: any additional Proposals on UA requirement to handle exceptions

On 05/12/2013 21:48, Jack L. Hobaugh Jr wrote:
> Nick,
>
> To maintain the balance or symmetry as proposed by Shane below, I
> would also add:
>
> To the extent that HTTP intermediaries are permitted by the TPE to
> inject a “DNT:1” signal (see TPE 4.2), the “HTTP intermediary” MUST
> also support User Granted Exceptions (“UGE”) to be compliant with the
> standard.
>
>


What about "Intermediaries SHALL not inject a DNT:1 signal when a DNT:0
signal is present"?

That should achieve the same. The problem with your suggestion is that
with the current way UGE is proposed intermediaries cannot support UGE
at all. It is not machine readable at a semantic level. So an
intermediary cannot reliably notice a UGE request and simply has to pass
in on to the UA. If the intermediary subsequently obediently leaves
alone subsequent DNT:0 signals from the UA, all is well.

Not that you could possibly detect it if it weren't the case...

Regards,

 Walter