| Description | The overall range of calendar dates and times over which this
schedule is active. It is stored in a slightly extended version
of the format for a 'period-explicit' defined in RFC 2445.
This format is expressed as a string representing the
starting date and time, in which the character 'T' indicates
the beginning of the time portion, followed by the solidus
character, '/', followed by a similar string representing an
end date and time. The start of the period MUST be before the
end of the period. Date-Time values are expressed as
substrings of the form 'yyyymmddThhmmss'. For example:
20000101T080000/20000131T130000
January 1, 2000, 0800 through January 31, 2000, 1PM
The 'Date with UTC time' format defined in RFC 2445 in which
the Date-Time string ends with the character 'Z' is not
allowed.
This 'period-explicit' format is also extended to allow two
special cases in which one of the Date-Time strings is
replaced with a special string defined in RFC 2445:
1. If the first Date-Time value is replaced with the string
'THISANDPRIOR', then the value indicates that the schedule
is active at any time prior to the Date-Time that appears
after the '/'.
2. If the second Date-Time is replaced with the string
'THISANDFUTURE', then the value indicates that the schedule
is active at any time after the Date-Time that appears
before the '/'.
Note that although RFC 2445 defines these two strings, they are
not specified for use in the 'period-explicit' format. The use
of these strings represents an extension to the
'period-explicit' format. |