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Re: meaning of DNT 1 and DNT 0 when sent by user agents [ISSUE-78]

From: Tom Lowenthal <tom@mozilla.com>
Date: Fri, 13 Jan 2012 15:30:32 -0800
Message-ID: <4F10BE98.10801@mozilla.com>
To: public-tracking@w3.org
Since there are obligations on first parties, and different obligations 
on third parties, I think that receiving the header just tells you how 
*you* need to behave, and doesn't give you any information about what 
header is being sent to other people.

On Fri 13 Jan 2012 02:41:09 PM PST, David Singer wrote:
> In reading a separate thread, I realized that there is a potential issue here over DNT:0.
> A little while back we discussed whether the UA should send a DNT header to the first party.  A number of us argued that it should, even if the first party is exempt: because the first party may care that its third parties are being asked not to track - it might ask for payment in consequence, for example.
> This argument relies on the assumption that DNT is a single 'big switch', either on or off, but the discussion around DNT:0 reveals that people think it may be OK for the UA to send DNT:1 to some sites, and DNT:0 to others.
> So what, then, does the first party get?  DNT:1 if any third party is getting DNT:1, else DNT:0 if all are getting DNT:0?  An average of the DNT values :-) DNT:0.7 ??!
> Am I, as a UA, allowed to mix non-DNT requests into the mix?
> David Singer
> Multimedia and Software Standards, Apple Inc.

Received on Friday, 13 January 2012 23:31:54 UTC

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