Support for iCalendar Relationships
draft-ietf-calext-ical-relations-05
Network Working Group M. Douglass
Internet-Draft Bedework
Updates: 5545 (if approved) July 29, 2020
Intended status: Standards Track
Expires: January 30, 2021
Support for iCalendar Relationships
draft-ietf-calext-ical-relations-05
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.
Status of This Memo
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This Internet-Draft will expire on January 30, 2021.
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Internet-Draft iCalendar Relationships July 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. Redefined Relation Type Value . . . . . . . . . . . . . . . . 5
5. New Property Parameters . . . . . . . . . . . . . . . . . . . 8
5.1. Rel . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2. Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6. New Value Data Types . . . . . . . . . . . . . . . . . . . . 9
7. New Properties . . . . . . . . . . . . . . . . . . . . . . . 10
7.1. Concept . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.2. Link . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.3. Refid . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8. Redefined RELATED-TO Property . . . . . . . . . . . . . . . . 13
8.1. RELATED-TO . . . . . . . . . . . . . . . . . . . . . . . 14
9. Security Considerations . . . . . . . . . . . . . . . . . . . 16
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 16
10.1. iCalendar Property Registrations . . . . . . . . . . . . 16
10.2. iCalendar Property Parameter Registrations . . . . . . . 16
10.3. iCalendar Value Data Type Registrations . . . . . . . . 16
10.4. iCalendar RELTYPE Value Registrations . . . . . . . . . 17
10.5. New Reference Type Registration . . . . . . . . . . . . 17
11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 17
12. Normative References . . . . . . . . . . . . . . . . . . . . 18
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 19
1. Introduction
iCalendar entities often need to be related to each other or to
associated meta-data. These relationships can take the following
forms
Structured iCalendar: iCalendar entities are related to each other
in some structured way, for example as parent, sibling, before,
after.
Grouped iCalendar: iCalendar entities are related to each other as a
group. CATEGORIES are often used for this purpose but are
problematic for application developers.
Linked: Entities are linked to each other through typed references.
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