Support for iCalendar Relationships
draft-ietf-calext-ical-relations-06
Network Working Group M. Douglass
Internet-Draft Bedework
Updates: 5545 (if approved) December 31, 2020
Intended status: Standards Track
Expires: July 4, 2021
Support for iCalendar Relationships
draft-ietf-calext-ical-relations-06
Abstract
This specification updates RELATED-TO defined in [RFC5545] and
introduces new iCalendar properties LINK, CONCEPT and REFID to allow
better linking and grouping of iCalendar components and related data.
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Douglass Expires July 4, 2021 [Page 1]
Internet-Draft iCalendar Relationships December 2020
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Structured iCalendar relationships . . . . . . . . . . . 3
1.2. Grouped iCalendar relationships . . . . . . . . . . . . . 3
1.3. Concept relationships . . . . . . . . . . . . . . . . . . 3
1.4. Linked relationships . . . . . . . . . . . . . . . . . . 4
1.5. Caching and offline use . . . . . . . . . . . . . . . . . 5
1.6. Conventions Used in This Document . . . . . . . . . . . . 5
2. Reference Types . . . . . . . . . . . . . . . . . . . . . . . 5
3. Link Relation Types . . . . . . . . . . . . . . . . . . . . . 5
4. New temporal RELTYPE Parameter values . . . . . . . . . . . . 6
5. Additional New RELTYPE Parameter Values . . . . . . . . . . . 7
6. New Property Parameters . . . . . . . . . . . . . . . . . . . 8
6.1. Link Relation . . . . . . . . . . . . . . . . . . . . . . 8
6.2. Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7. New Value Data Types . . . . . . . . . . . . . . . . . . . . 9
8. New Properties . . . . . . . . . . . . . . . . . . . . . . . 9
8.1. Concept . . . . . . . . . . . . . . . . . . . . . . . . . 9
8.2. Link . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8.3. Refid . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9. Redefined RELATED-TO Property . . . . . . . . . . . . . . . . 12
9.1. RELATED-TO . . . . . . . . . . . . . . . . . . . . . . . 12
10. Security Considerations . . . . . . . . . . . . . . . . . . . 14
11. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14
11.1. iCalendar Property Registrations . . . . . . . . . . . . 14
11.2. iCalendar Property Parameter Registrations . . . . . . . 15
11.3. iCalendar Value Data Type Registrations . . . . . . . . 15
11.4. iCalendar RELTYPE Value Registrations . . . . . . . . . 15
11.5. New Reference Type Registration . . . . . . . . . . . . 16
12. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 16
13. Normative References . . . . . . . . . . . . . . . . . . . . 16
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 17
1. Introduction
iCalendar entities often need to be related to each other or to
associated meta-data. The specifications below support relationships
of the following forms:
Structured iCalendar: iCalendar entities can be related to each
other in some structured way, for example as parent, sibling,
before, after.
Grouped iCalendar: iCalendar entities can be related to each other
as a group. CATEGORIES are often used for this purpose but are
problematic for application developers due to their lack of
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