Document Name: W3C TR
Document URI:
Online Version:
Organization: World Wide Web Consortium (W3C)
Series: Technical Report (TR)
Abstract: 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 exceptions to DNT as desired.

Specified Web Concepts:

HTTP Header Fields

DNT , Tk

Media Types


Well-Known URIs


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