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4. Modifications to Calendar Components

This section details changes to the syntax defined in iCalendar [RFC5545]. New elements are defined in subsequent sections.

calprops =/ *(
          ;
          ; The following are OPTIONAL,
          ; but MUST NOT occur more than once.
          ;
          uid / last-mod / url /
          refresh / source / color
          ;
          ; The following are OPTIONAL,
          ; and MAY occur more than once.
          ;
          name / description / categories /
          image
          ;
          )

eventprop =/ *(
           ;
           ; The following are OPTIONAL,
           ; but MUST NOT occur more than once.
           ;
           color /
           ;
           ; The following are OPTIONAL,
           ; and MAY occur more than once.
           ;
           conference / image
           ;
           )

todoprop =/ *(
          ;
          ; The following are OPTIONAL,
          ; but MUST NOT occur more than once.
          ;
          color /
          ;
          ; The following are OPTIONAL,
          ; and MAY occur more than once.
          ;
          conference / image
          ;
          )

jourprop =/ *(
          ;
          ; The following are OPTIONAL,
          ; but MUST NOT occur more than once.
          ;
          color /
          ;
          ; The following are OPTIONAL,
          ; and MAY occur more than once.
          ;
          image
          ;
          )

This document was automatically converted to XHTML using an RFC to HTML converter with the original text document at the Internet Engineering Task Force web site at ietf.org .  The original text document should be referred to if there are any errors or discrepancies found in this document.

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The iCalendar Validator provides developers and testers a method to validate their iCalendar feeds, which can take data from either a URL, file or text snippet and compare it against the RFC 5545 specification.  We believe we have one of the best iCalendar validation tools available on the internet. More information about the validator can be found here.