rfc9253v2.txt   rfc9253.txt 
Internet Engineering Task Force (IETF) M. Douglass Internet Engineering Task Force (IETF) M. Douglass
Request for Comments: 9253 Bedework Request for Comments: 9253 Bedework
Updates: 5545 July 2022 Updates: 5545 August 2022
Category: Standards Track Category: Standards Track
ISSN: 2070-1721 ISSN: 2070-1721
Support for iCalendar Relationships Support for iCalendar Relationships
Abstract Abstract
This specification updates the iCalendar RELATED-TO property defined This specification updates the iCalendar RELATED-TO property defined
in RFC 5545 by adding new relation types and introduces new iCalendar in RFC 5545 by adding new relation types and introduces new iCalendar
properties (LINK, CONCEPT, and REFID) to allow better linking and properties (LINK, CONCEPT, and REFID) to allow better linking and
skipping to change at line 384 skipping to change at line 384
6.1. Link Relation 6.1. Link Relation
Parameter name: LINKREL Parameter name: LINKREL
Purpose: This property specifies the relationship of data referenced Purpose: This property specifies the relationship of data referenced
by a LINK property. by a LINK property.
Format Definition: This parameter is defined by the following Format Definition: This parameter is defined by the following
notation: notation:
linkrelparam = "LINKREL" "=" linkrelparam = "LINKREL" "="
/ DQUOTE uri DQUOTE (DQUOTE uri DQUOTE
/ iana-token) ; Other IANA registered type / iana-token) ; Other IANA registered type
Description: This parameter MUST be specified on all LINK properties Description: This parameter MUST be specified on all LINK properties
and define the type of reference. This allows programs consuming and define the type of reference. This allows programs consuming
this data to automatically scan for references they support. this data to automatically scan for references they support.
There is no default relation type. There is no default relation type.
Any link relation in the link registry established by [RFC8288], Any link relation in the link registry established by [RFC8288],
or new link relations, may be used. It is expected that link or new link relations, may be used. It is expected that link
relation types seeing significant usage in calendaring will have relation types seeing significant usage in calendaring will have
the calendaring usage described in an RFC. the calendaring usage described in an RFC.
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