Calendaring Extensions (calext)
| WG | Name | Calendaring Extensions | |||
|---|---|---|---|---|---|
| Acronym | calext | ||||
| Area | Applications and Real-Time Area (art) | ||||
| State | Active | ||||
| Charter | charter-ietf-calext-01 Approved | ||||
| Dependencies | Document dependency graph (SVG) | ||||
| Additional Resources |
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| Personnel | Chairs |
Bron Gondwana
Daniel Migault |
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| Area Director |
Barry Leiba
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| Mailing list | Address | calsify@ietf.org | |||
| To subscribe | http://www.ietf.org/mailman/listinfo/calsify | ||||
| Archive | https://mailarchive.ietf.org/arch/browse/calsify/ | ||||
| Jabber chat | Room address | xmpp:calext@jabber.ietf.org?join | |||
| Logs | https://jabber.ietf.org/logs/calext/ | ||||
Charter for Working Group
The Calendaring Extensions working group is chartered to develop
extensions to the iCalendar (RFC 5545), iTIP (RFC 5546), and
CalDAV (RFC 4791) standards.
This working group will do the following:
- Develop an extension to iCalendar to support non-Gregorian recurrence
rules, without the need to support new calendar scale values in
iCalendar as a whole. This will allow for easy implementation of the
primary use case for non-Gregorian support in calendar systems, without
the need for significant changes to the iCalendar format. The
non-Gregorian calendar system should be based on the International
Components for Unicode work by the Unicode Consortium
(http://site.icu-project.org).
- Develop an extension to iCalendar to support a new component type that
allows users to express arbitrary, possibly repeating, periods of
"available" time. The primary use case for this is for users to express
their "office hours" (e.g., Monday-Friday, 9am-5pm) in a standard way to
ensure free busy lookups show the correct periods of availability.
- Define a set of new iCalendar properties and parameters to standardise
some existing experimental X- properties in common use, based on a
survey of existing implementations.
- Define a set of new iCalendar properties and parameters to cover key
uses cases that implementers have identified, including, but not
limited to, a new "IMAGE" property (to allow embedding/linking of
images tied to a specific event), and a "CONFERENCE" property (to allow
embedding information about dial-in numbers and similar multi-party
communication options for an event).
The working group will work under the following parameters:
- The extensions developed are expected to be backwards-compatible with
the existing calendar standards. Incompatibilities must be identified,
minimized, and justified.
- For each set of extensions, examine their impact on the iTIP protocol
(RFC 5546), and define any necessary extensions to iTIP to accommodate
such impact.
- For each set of extensions, examine their impact on the CalDAV
protocol (RFC 4791), and define any necessary extensions to CalDAV to
accommodate such impact. Interface with the httpbis working group to
ensure that any CalDAV changes are consistent with good http practices.
The working group will use the following drafts as initial input for its
work:
draft-daboo-icalendar-rscale-03
draft-daboo-calendar-availability-05
draft-daboo-icalendar-extensions-08
The following are out of scope for the working group:
- Any change that impacts backwards compatibility with existing
deployed iCalendar/iTIP/CalDAV clients and servers will be discussed
by the working group with a view to minimizing disruption to deployed
implementations without compromising desirable new function.
- Any attempt to develop non-Gregorian calendar systems/calculations.
Milestones
| Date | Milestone |
|---|---|
| Jul 2021 |
Submit vpoll document to IESG for publication
draft-ietf-calext-vpoll |
| Mar 2021 |
Submit JSCalendar mapping document to IESG for publication
draft-ietf-calext-jscalendar-icalendar |
| Mar 2021 |
Submit Serverside Subscription draft to IESG for publication
draft-douglass-serverside-subscriptions |
| Jan 2021 |
Submit scheduling controls document to IESG for publication
draft-ietf-calext-caldav-scheduling-controls |
| Dec 2020 |
Submit icalendar relations document to IESG for publication
draft-ietf-calext-ical-relations |
| Dec 2020 |
Submit Subscription Upgrade document to IESG for publication
draft-ietf-calext-subscription-upgrade |
| Dec 2020 |
Submit calendar series document to IESG for publication
draft-ietf-calext-icalendar-series |
| Dec 2020 |
Submit valarm document to IESG for publication
draft-ietf-calext-valarm-extensions |
Done milestones
| Date | Milestone |
|---|---|
| Done |
Send JSCalendar draft to IESG
draft-ietf-calext-jscalendar |
| Done |
Adopt a draft for Server Side Subscription
draft-douglass-serverside-subscriptions |
| Done | Update charter/milestones to reflect current and planned work |
| Done |
Adopt a document for consensus scheduling
draft-calext-vpoll |
| Done |
Send iCal relation draft to IESG
draft-ietf-calext-ical-relations |
| Done |
Send Event Publication draft to IESG
draft-ietf-calext-eventpub-extensions |
| Done |
Adopt a document for subscription upgrade
draft-ietf-calext-subscription-upgrade |
| Done |
Send attachment dratf to IESG
draft-ietf-calext-caldav-attachments |
| Done | Submit extensions draft to IESG for publication |
| Done | Submit availability draft to IESG for publication |
| Done | WG adoption of an extensions draft |
| Done | WG adoption of an availability draft |
| Done | Submit non-Gregorian recurrence rule draft to IESG for publication |