Support for Series in iCalendar
draft-ietf-calext-icalendar-series-01
Network Working Group M. Douglass
Internet-Draft Bedework
Updates: 5545 (if approved) July 28, 2020
Intended status: Standards Track
Expires: January 29, 2021
Support for Series in iCalendar
draft-ietf-calext-icalendar-series-01
Abstract
This specification updates [RFC5545] by defining a new repeating set
of events known as a series. This differs from recurrences in that
each instance is a separate entity with a parent relationship to a
specified template entity.
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Douglass Expires January 29, 2021 [Page 1]
Internet-Draft iCalendar Series July 2020
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Overrides and iCalendar recurrences . . . . . . . . . . . . . 3
2.1. Changing the master start or the recurrence rules . . . . 3
2.2. Splitting recurrences . . . . . . . . . . . . . . . . . . 4
3. Series . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1. Modifying series patterns and splitting . . . . . . . . . 5
3.2. The series master . . . . . . . . . . . . . . . . . . . . 5
3.3. The series instances . . . . . . . . . . . . . . . . . . 6
4. Redefined Relation Type Value . . . . . . . . . . . . . . . . 6
5. New Property Parameters . . . . . . . . . . . . . . . . . . . 9
5.1. Split . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.2. Lookahead count . . . . . . . . . . . . . . . . . . . . . 10
5.3. Lookahead period . . . . . . . . . . . . . . . . . . . . 10
6. New Properties . . . . . . . . . . . . . . . . . . . . . . . 11
6.1. Generating Series members . . . . . . . . . . . . . . . . 11
6.2. Series UID . . . . . . . . . . . . . . . . . . . . . . . 12
6.3. Series-exception-date . . . . . . . . . . . . . . . . . . 13
6.4. Series-date . . . . . . . . . . . . . . . . . . . . . . . 14
6.5. Series-id . . . . . . . . . . . . . . . . . . . . . . . . 16
6.6. Last series id . . . . . . . . . . . . . . . . . . . . . 17
6.7. Series Rule . . . . . . . . . . . . . . . . . . . . . . . 19
6.8. SITEM-STATUS Property . . . . . . . . . . . . . . . . . . 21
7. Redefined RELATED-TO Property . . . . . . . . . . . . . . . . 21
7.1. RELATED-TO . . . . . . . . . . . . . . . . . . . . . . . 21
8. Backwards compatibility . . . . . . . . . . . . . . . . . . . 23
9. CalDAV extensions . . . . . . . . . . . . . . . . . . . . . . 24
10. Security Considerations . . . . . . . . . . . . . . . . . . . 24
11. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 24
11.1. iCalendar Property Registrations . . . . . . . . . . . . 24
11.2. iCalendar Property Parameter Registrations . . . . . . . 25
11.3. iCalendar RELTYPE Value Registrations . . . . . . . . . 25
12. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 25
13. Normative References . . . . . . . . . . . . . . . . . . . . 26
Appendix A. Points for discussion . . . . . . . . . . . . . . . 26
Appendix B. Change log . . . . . . . . . . . . . . . . . . . . . 27
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 27
1. Introduction
Since iCalendar was first defined there has been only one standard
way to express a repeating set of events - the recurrence. This
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