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Raw RFC Text
3.3.9. Period of Time
Value Name: PERIOD
Purpose: This value type is used to identify values that contain a
precise period of time.
Format Definition: This value type is defined by the following
notation:
period = period-explicit / period-start
period-explicit = date-time "/" date-time
; [ISO.8601.2004] complete representation basic format for a
; period of time consisting of a start and end. The start MUST
; be before the end.
period-start = date-time "/" dur-value
; [ISO.8601.2004] complete representation basic format for a
; period of time consisting of a start and positive duration
; of time.
Description: If the property permits, multiple "period" values are
specified by a COMMA-separated list of values. There are two
forms of a period of time. First, a period of time is identified
by its start and its end. This format is based on the
[ISO.8601.2004] complete representation, basic format for "DATE-
TIME" start of the period, followed by a SOLIDUS character
followed by the "DATE-TIME" of the end of the period. The start
of the period MUST be before the end of the period. Second, a
period of time can also be defined by a start and a positive
duration of time. The format is based on the [ISO.8601.2004]
complete representation, basic format for the "DATE-TIME" start of
the period, followed by a SOLIDUS character, followed by the
[ISO.8601.2004] basic format for "DURATION" of the period.
Example: The period starting at 18:00:00 UTC, on January 1, 1997 and
ending at 07:00:00 UTC on January 2, 1997 would be:
19970101T180000Z/19970102T070000Z
The period start at 18:00:00 on January 1, 1997 and lasting 5
hours and 30 minutes would be:
19970101T180000Z/PT5H30M
No additional content value encoding (i.e., BACKSLASH character
encoding, see Section 3.3.11) is defined for this value type.
Implement the
Period of TimeData TypeEnsure #23 is complete BEFORE starting this issue.
Raw RFC Text