Network Working Group E. Lear
Internet-Draft Cisco Systems GmbH
Intended status: BCP P. Eggert
Expires: June 20, 2011 UCLA
December 17, 2010
IANA Procedures for Maintaining the Timezone Database
draft-lear-iana-timezone-database-01
Abstract
ATTENTION: This memo contains a DRAFT proposal for the IANA to assume
operational responsibilities relating to the management of the
Timezone (TZ) Database. The authors seek comment and review of this
proposal. No action will be taken without rough consensus of the TZ
community.
The Timezone (TZ) Database consists of timezone information for all
localities throughout the world. This database has been meticulously
maintained and distributed free of charge by a group of volunteers,
coordinated by a single volunteer who is now planning to retire.
This memo specifies a DRAFT PROPOSAL for the IANA procedures involved
with maintenance of the TZ database and associated code, including
how to submit proposed updates, how decisions for inclusion of those
updates are made, and the selection of a designated expert BY AND FOR
the timezone community. The intent of this memo is, to the extent
possible, document existing practice and provide a means to ease
succession.
Status of this Memo
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Internet-Draft Maintaining the Timezone Database December 2010
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Copyright Notice
Copyright (c) 2010 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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1. Introduction
ATTENTION: This memo contains a DRAFT proposal for the IANA to assume
operational responsibilities relating to the management of the
Timezone (TZ) Database. The authors seek comment and review of this
proposal. No action will be taken without rough consensus of the TZ
community.
Since the early 1980s, a database that is in use on nearly all UNIX
systems, Java systems, and other sorts of systems has been hosted at
the National Institutes of Health. [TZDB] The database consists of
both historic and current entries for geographies throughout the
world. Associated with the database is a reference implementation of
functions that can be used to convert time values.
The database has been maintained by volunteers that participate in a
mailing list that is also hosted at the NIH. The database itself is
updated approximately twenty times per year, depending on the year,
based on information these experts provide to the maintainer. Arthur
David Olson has maintained the database, coordinated the mailing
list, and provided a release platform since the database's inception.
With his retirement now approaching it is necessary to provide a
means for this good work to continue. The Internet community owes
Arthur Olson and the volunteers on the tz mailing list a debt of
gratitude.
The IANA provides registry services to the Internet community. Those
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registries are coordinated by technical experts who are designated by
the Internet Engineering Steering Group (IESG). The IANA is also
well suited as a distribution platform for the TZ database itself.
The IETF has for quite some time had the capability to maintain non-
working group mailing lists. The TZ mailing list would fit nicely
just as such a list.
1.1. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
TZ Database The TimeZone Database, sometimes referred to as the
Olson Database. This database consists of information about
offsets from UTC for different localities, including daylight
savings time (DST) transition information.
TZ Coordinator The person or people who maintain and manage release
of the TZ Database. The TZ coordinator also has responsibility
for maintaining the TZ mailing list. The TZ coordinatior is a
Designated Expert, as defined in [RFC5226]. Roughly speaking, it
means that the IESG will choose one or more experts to manage the
TZ database, code, and mailing list.
TZ mailing list The forum where matters relating to the TZ database
and supporting code are discussed.
The rest of this document specifies the following:
1. Transferring and maintenance of the TZ mailing list;
2. Procedures for selecting a technical expert for the technical
expert who will play the role of coordinator, as well as release
manager for the TZ database;
3. Procedures for updating the TZ database;
4. Maintenance and ownership of reference code; and
5. Ownership of the database.
2. The TZ Mailing List
For many years the TZ mailing list at the NIH has been the forum
where discussion of changes to the TZ database and support files
would take place. In addition, the TZ mailing list is used to
announce releases of the database. Currently the TZ mailing list is
administered by the TZ coordinator.
This list membership will be transitioned to the IETF mail server.
The TZ coordinator will continue to manage the list, in accordance
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with rules of governance for non-WG mailing lists, with the following
exception: instead of the normal "Note Well" statement, the following
statement shall apply in its place:
The Contributor, each named co-Contributor, and the organizations
represented above irrevocably and in perpetuity grant the rights
listed below to the Internet Community:
1. to prepare or allow the preparation of translations of the TZ
database into languages other than English,
2. to prepare derivative works (other than translations) that are
based on or incorporate all or part of the TZ Contribution, or
comment upon it. The license to such derivative works shall not
grant the IETF Trust, the IETF, or other party preparing a
derivative work any more rights than the license to the original
TZ Contribution, and
3. to reproduce any trademarks, service marks, or trade names that
are included in the TZ Contribution solely in connection with the
reproduction, distribution, or publication of the TZ Contribution
and derivative works.
The list will be used just as it has been, to learn of, discuss, and
confirm TZ definition changes, as well as an announcement list for
new versions of the database. The TZ coordinator will continue to
manage the list.
3. Making Updates to the TZ Database
Updates to the TZ database are made by the TZ coordinator in
consultation with the TZ mailing list. TZ coordinator is empowered
to decide, as the designated expert, appropriate changes, but SHOULD
take into account views expressed on the mailing list.
The TZ coordinator will also decide the timing of database releases.
The release itself today consists of several tar files that are
downloaded from a well known location.
Moving forward, the TZ database SHOULD be signed prior to release
using a well known key, along with any appropriate supporting
information and distributed from a well known location that is
advertised by IANA in a manner of its choosing.
4. Selecting or Replacing a TZ Coordinator
From time to time it will be necessary to appoint a TZ Coordinator.
This could occur for a number of reasons:
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o The coordinator is retiring (as Arthur Olson is) or has announced
that he or she will be unable to continue to perform the function;
o The coordinator is missing or has died;
o The coordinator is not performing the function in accordance with
community wishes.
In any of these cases, members of the community should raise the
issue on the TZ list. If a rough consensus can be formed easily, and
quickly, then the results should be presented to the IESG for comment
and review. In keeping with [RFC5226], the IESG selects the TZ
coordinator(s). The IESG will use rough consensus of the TZ mailing
list as their primary guide to further action, when it exists, and
whatever other means they have at their disposal, when rough
consensus cannot be found. As RFC-5226 states, the IESG is not a
normal avenue for appeals of specific decisions of the coordinator,
but rather a last resort when a coordinator is thought not to be
functioning in an appropriate way.
N.B., the coordinator is a function, and may be filled by one OR MORE
people, as the community sees fit.
5. Maintenance and Distribution of Reference Code
Currently the maintainer of the TZ database also maintains reference
code, most of which is public domain. Several files from this
software are currently distributed under license. No change shall be
made to licenses, where they exist. IANA shall allow for the
downloading of this reference code. The reference implementation
shall be distributed along with an associated cryptographic signature
of an identity that IANA will publish.
6. Database Ownership
The database itself is public domain. Should claims be made and
substantiated against the database, the IANA will act in accordance
with all competent court orders. No ownership claims will be made by
IANA, the IETF Trust, or ISOC on the database or the code.
7. IANA Considerations
The IANA will assist the IESG, as required, in filling of the TZ
Coordinator, based on the procedures set forth above. The IANA will
act as a repository for the TZ database and associated reference
code. The database coordinator will be named by the IESG as
described above, and will act as the maintainer of the database and
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code, as described above. The IANA will provide the TZ coordinator
with appropriate access to maintain the database, as well as
necessary tooling that may be required, so long as no direct software
costs are incurred. Both current and historical versions of the
database will be stored and distributed via HTTP/HTTPs. IANA will be
operationally responsible for the security of the system upon which
the database resides.
The IANA will also maintain a cryptographic identity that is used to
sign the database, and that will survive a change of coordinators.
8. Security Considerations
The distribution of the database is currently not secured. This memo
states that moving forward the TZ database SHOULD be distributed with
a valid cryptographic signature.
9. Acknowledgments
The authors would like to thank the TZ mailing list for their
remarkable achievements over the many years. Thanks also to Marshall
Eubanks, S. Moonesamy, Peter Saint-Andre, Alexey Melenkov, and Tony
Finch for the improvements they made to this document. A special
acknowledgment should be given to Arthur David Olson for his
excellent stewardship.
10. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an
IANA Considerations Section in RFCs", BCP 26, RFC 5226,
May 2008.
[TZDB] Eggert, P. and A. Olson, "Sources for Time Zone and
Daylight Saving Time Data",
<http://www.twinsun.com/tz/tz-link.htm>.
Appendix A. Changes
o 01: Proper reference to RFC5226, add acknowledgments, several
rewordings.
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o Initial Revision
Authors' Addresses
Eliot Lear
Cisco Systems GmbH
Richtistrasse 7
Wallisellen, ZH CH-8304
Switzerland
Phone: +41 1 878 9200
Email: lear@cisco.com
Paul Eggert
UCLA
Computer Science Department
4532J Boelter Hall
Los Angeles, CA 90095
USA
Phone: +1 310 267 2254
Email: eggert@cs.ucla.edu
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