Timezone Service Protocol
draft-douglass-timezone-service-10

Network Working Group                                        M. Douglass
Internet-Draft                                                       RPI
Intended status: Standards Track                                C. Daboo
Expires: August 8, 2014                                            Apple
                                                        February 4, 2014

                       Timezone Service Protocol
                   draft-douglass-timezone-service-10

Abstract

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

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Douglass & Daboo         Expires August 8, 2014                 [Page 1]
Internet-Draft          Timezone Service Protocol          February 2014

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  4
     1.1.  Conventions  . . . . . . . . . . . . . . . . . . . . . . .  4
     1.2.  Glossary of terms  . . . . . . . . . . . . . . . . . . . .  4
   2.  Architectural Overview . . . . . . . . . . . . . . . . . . . .  5
   3.  General Considerations . . . . . . . . . . . . . . . . . . . .  6
     3.1.  Timezone Identifiers . . . . . . . . . . . . . . . . . . .  6
     3.2.  Timezone Aliases . . . . . . . . . . . . . . . . . . . . .  7
     3.3.  Timezone Localized Names . . . . . . . . . . . . . . . . .  7
     3.4.  Truncated Timezones  . . . . . . . . . . . . . . . . . . .  7
   4.  Timezones Service Protocol . . . . . . . . . . . . . . . . . .  8
     4.1.  Server Protocol  . . . . . . . . . . . . . . . . . . . . .  8
       4.1.1.  Timezone Queries . . . . . . . . . . . . . . . . . . .  8
       4.1.2.  Timezone Formats . . . . . . . . . . . . . . . . . . .  9
       4.1.3.  Conditional Timezone Requests  . . . . . . . . . . . .  9
       4.1.4.  Expanded Timezone Data . . . . . . . . . . . . . . . .  9
       4.1.5.  Server Requirements  . . . . . . . . . . . . . . . . . 10
       4.1.6.  Error Responses  . . . . . . . . . . . . . . . . . . . 10
       4.1.7.  Extensions . . . . . . . . . . . . . . . . . . . . . . 10
     4.2.  Client Guidelines  . . . . . . . . . . . . . . . . . . . . 10
       4.2.1.  Discovery  . . . . . . . . . . . . . . . . . . . . . . 10
         4.2.1.1.  Timezone Service SRV Service Labels  . . . . . . . 11
         4.2.1.2.  Timezone Service TXT records . . . . . . . . . . . 11
         4.2.1.3.  Timezone Service Well-Known URI  . . . . . . . . . 12
           4.2.1.3.1.  Example: well-known URI redirects to
                       actual context path  . . . . . . . . . . . . . 12
       4.2.2.  Initial Synchronization of All Timezones . . . . . . . 12
       4.2.3.  Subsequent Synchronization of All Timezones  . . . . . 13
   5.  Request Parameters . . . . . . . . . . . . . . . . . . . . . . 13
     5.1.  "action" Parameter . . . . . . . . . . . . . . . . . . . . 13
     5.2.  "format" Parameter . . . . . . . . . . . . . . . . . . . . 13
     5.3.  "changedsince" Parameter . . . . . . . . . . . . . . . . . 14
     5.4.  "start" Parameter  . . . . . . . . . . . . . . . . . . . . 14
     5.5.  "end" Parameter  . . . . . . . . . . . . . . . . . . . . . 14
     5.6.  "lang" Parameter . . . . . . . . . . . . . . . . . . . . . 14
     5.7.  "tzid" Parameter . . . . . . . . . . . . . . . . . . . . . 15