Time Zone Data Distribution Service
draft-ietf-tzdist-service-04

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Document Type Active Internet-Draft (tzdist WG)
Last updated 2014-12-10
Replaces draft-douglass-timezone-service
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Stream WG state WG Document (wg milestone: Jan 2015 - WGLC for time zone d... )
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Network Working Group                                        M. Douglass
Internet-Draft                                                       RPI
Intended status: Standards Track                                C. Daboo
Expires: June 13, 2015                                             Apple
                                                       December 10, 2014

                  Time Zone Data Distribution Service
                      draft-ietf-tzdist-service-04

Abstract

   This document defines a time zone data distribution service that
   allows reliable, secure and fast delivery of time zone data to client
   systems such as calendaring and scheduling applications or operating
   systems.

Status of This Memo

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   This Internet-Draft will expire on June 13, 2015.

Copyright Notice

   Copyright (c) 2014 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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Douglass & Daboo          Expires June 13, 2015                 [Page 1]
Internet-Draft               TZDIST Service                December 2014

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Conventions . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Architectural Overview  . . . . . . . . . . . . . . . . . . .   4
   3.  General Considerations  . . . . . . . . . . . . . . . . . . .   6
     3.1.  Time Zone . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.2.  Time Zone Data  . . . . . . . . . . . . . . . . . . . . .   6
     3.3.  Time Zone Data Server . . . . . . . . . . . . . . . . . .   7
     3.4.  Observance  . . . . . . . . . . . . . . . . . . . . . . .   7
     3.5.  Time Zone Identifiers . . . . . . . . . . . . . . . . . .   7
     3.6.  Time Zone Aliases . . . . . . . . . . . . . . . . . . . .   7
     3.7.  Time Zone Localized Names . . . . . . . . . . . . . . . .   8
     3.8.  Truncating Time Zones . . . . . . . . . . . . . . . . . .   8
   4.  Time Zone Data Distribution Service Protocol  . . . . . . . .   9
     4.1.  Server Protocol . . . . . . . . . . . . . . . . . . . . .   9
       4.1.1.  Time Zone Queries . . . . . . . . . . . . . . . . . .  10
       4.1.2.  Time Zone Formats . . . . . . . . . . . . . . . . . .  10
       4.1.3.  Time Zone Localization  . . . . . . . . . . . . . . .  10
       4.1.4.  Conditional Time Zone Requests  . . . . . . . . . . .  10
       4.1.5.  Expanded Time Zone Data . . . . . . . . . . . . . . .  12
       4.1.6.  Server Requirements . . . . . . . . . . . . . . . . .  12
       4.1.7.  Error Responses . . . . . . . . . . . . . . . . . . .  12
       4.1.8.  Extensions  . . . . . . . . . . . . . . . . . . . . .  12
     4.2.  Client Guidelines . . . . . . . . . . . . . . . . . . . .  13
       4.2.1.  Discovery . . . . . . . . . . . . . . . . . . . . . .  13
         4.2.1.1.  Time Zone Data Distribution Service SRV Service
                   Labels  . . . . . . . . . . . . . . . . . . . . .  13
         4.2.1.2.  Time Zone Data Distribution Service TXT records .  14
         4.2.1.3.  Time Zone Data Distribution Service Well-Known
                   URI . . . . . . . . . . . . . . . . . . . . . . .  14
           4.2.1.3.1.  Example: well-known URI redirects to actual
                       context path  . . . . . . . . . . . . . . . .  15
       4.2.2.  Initial Synchronization of All Time Zones . . . . . .  15
       4.2.3.  Subsequent Synchronization of All Time Zones  . . . .  15
   5.  Actions . . . . . . . . . . . . . . . . . . . . . . . . . . .  15
     5.1.  "capabilities" Action . . . . . . . . . . . . . . . . . .  16
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