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RFC 5545, "Internet Calendaring and Scheduling Core Object Specification (iCalendar)", September 2009

Source of RFC: calsify (app)

Errata ID: 3038
Status: Held for Document Update
Type: Technical

Reported By: Brent Bloxam
Date Reported: 2011-11-30
Held for Document Update by: Peter Saint-Andre
Date Held: 2011-12-06

Section 3.8.7.2 says:

Value Type:  DATE-TIME

   Property Parameters:  IANA and non-standard property parameters can
      be specified on this property.

   Conformance:  This property MUST be included in the "VEVENT",
      "VTODO", "VJOURNAL", or "VFREEBUSY" calendar components.

   Description:  The value MUST be specified in the UTC time format.

      This property is also useful to protocols such as [2447bis] that
      have inherent latency issues with the delivery of content.  This
      property will assist in the proper sequencing of messages
      containing iCalendar objects.

It should say:

Value Type:  DATE-TIME. The time value MUST be in the DATE WITH UTC
      TIME form defined for the DATE-TIME value type.

   Property Parameters:  IANA and non-standard property parameters can
      be specified on this property.

   Conformance:  This property MUST be included in the "VEVENT",
      "VTODO", "VJOURNAL", or "VFREEBUSY" calendar components.

   Description:  This property is also useful to protocols such as
      [2447bis] that have inherent latency issues with the delivery of
      content.  This property will assist in the proper sequencing of
      messages containing iCalendar objects.

Notes:

Application of the DATE-TIME value type is inconsistent in the RFC, and can lead to ambiguity since DATE-TIME can take on three different forms. The wording for the corrected Value Type for DTSTAMP is similar to the DTSTART property's Value Type. This is to make it clear that the only acceptable form is DATE WITH UTC TIME. You can also see evidence of defining specificity inline with the Value Type in the GEO property.

The spec author comments: "To improve consistency, we should modify Section 3.8.7.2. Date-Time Stamp and Section 3.8.7.3. Last Modified to use the same phrasing as Section 3.8.7.1. Date-Time Created and Section 3.8.2.1. Date-Time Completed."

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