02 October 2012 The Tracking Protection Working Group has published two Working Drafts today. Tracking Preference Expression (DNT) .This specification defines the technical mechanisms for expressing a tracking preference via the DNT request header field in HTTP, via an HTML DOM property readable by embedded scripts, and via properties accessible to various user agent plug-in or extension APIs. It also defines mechanisms for sites to signal whether and how they honor this preference, both in the form of a machine-readable tracking status resource at a well-known location and via a Tk response header field, and a mechanism for allowing the user to approve site-specific exceptions to DNT as desired. Tracking Compliance and Scope . This specification defines the meaning of a Do Not Track (DNT) preference and sets out practices for websites to comply with this preference. Learn more about the Privacy Activity .