The Time Zone Data Distribution Service (TZDIST) Geolocate Extension
draft-murchison-tzdist-geolocate-02

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Independent Submission                                      K. Murchison
Internet-Draft                                                  FastMail
Intended status: Standards Track                             May 8, 2018
Expires: November 9, 2018

  The Time Zone Data Distribution Service (TZDIST) Geolocate Extension
                  draft-murchison-tzdist-geolocate-02

Abstract

   This document defines an extension to the Time Zone Data Distribution
   Service (RFC 7808) to allow a client to determine the correct time
   zone for a geographic point location using a 'geo' URI (RFC 5870).

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on November 9, 2018.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   2
   3.  "geolocate" Action  . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Examples: geolocate
           action  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   6
   5.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
     6.1.  Service Action Registration . . . . . . . . . . . . . . .   6
     6.2.  Registration of invalid-location Error URN  . . . . . . .   6
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   6
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Appendix A.  Change History (To be removed by RFC Editor before
                publication) . . . . . . . . . . . . . . . . . . . .   7
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   Clients using a Time Zone Data Distribution Service (TZDIST),
   particularly mobile clients, may not have prior knowledge of which
   time zone is appropriate for a particular geographic region.  This
   specification defines a new TZDIST service action to allow a client
   to query a server with a geographic point location and have that
   server determine if the location lies within the boundaries of an
   existing time zone and return the corresponding time zone identifier.

   This specification does not define the source of the time zone
   boundary data.  It is assumed that a reliable and accurate source is
   available.  One such source is the Time Zone Boundary Builder [TZBB].

2.  Conventions Used in This Document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   [RFC2119].

   This specification contains examples of HTTP requests and responses.
   In some cases, additional line breaks have been introduced into the
   request or response data to match maximum line-length limits of this
   document.

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3.  "geolocate" Action

   Name:  geolocate

   Request-URI Template:
      {/service-prefix,data-prefix}/zones{?location}

   Description:  This action allows a client to query the time zone data
      distribution service for the time zone identifier corresponding to
      the given geographic point location, specified as a 'geo' URI
      [RFC5870].

      If the 'geo' URI specifies an uncertainty value (";u=" parameter),
      the server MUST return the time zone identifiers for all time
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