Re: tracking-ISSUE-121: Should a user agent advertise its DNT ability by, e.g., sending DNT;NULL [Tracking Preference Expression (DNT)]

Apologies if I'm repeating questions from the f2f but I'm still uncertain about the use cases for this proposal. 

What would a server/publisher do differently if it received DNT:null than if it didn't receive a DNT header at all? Why would a user wish to broadcast their user agent's ability when they hadn't yet expressed a preference?

—Nick

On Jan 31, 2012, at 1:33 AM, Tracking Protection Working Group Issue Tracker wrote:
> tracking-ISSUE-121: Should a user agent advertise its DNT ability by, e.g., sending DNT;NULL [Tracking Preference Expression (DNT)]
> 
> http://www.w3.org/2011/tracking-protection/track/issues/121
> 
> Raised by: Shane Wiley
> On product: Tracking Preference Expression (DNT)
> 
> 2012-01-30 Shane said:
> 
> <non-normative>
> As many User Agents may fall outside of the large web browser vendors, such as Apps, Toolbars, Custom Web Kits, etc., it will be helpful for publishers to receive a signal that a User Agent supports DNT even when a user has not yet provided a preference.
> 
> <normative>
> User Agents SHOULD provide a null DNT signal if the user has not yet provided a preference and the User Agent supports DNT. 
> As many User Agents may fall outside of the large web browser vendors, such as Apps, Toolbars, Custom Web Kits, etc., it will be helpful for publishers to receive a signal that a User Agent supports DNT even when a user has not yet provided a preference.
> 
> <normative>
> User Agents SHOULD provide a null DNT signal if the user has not yet provided a preference and the User Agent supports DNT.

Received on Wednesday, 1 February 2012 14:40:44 UTC