ISO 8601 P format

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The ISO 8601 P, or ISO 8601 duration, format is:


where the values year, month, etc., are integer values specifying a duration or an offset (delta) from the current time. The initial P is required; other fields may be omitted, though the T is required if any time values are specified.

Note that all of the letters in ISO 8601 P values must be written in upper case.

For example, PT1H means a one hour duration or offset.

Besides the backoff channel option and a few alias options, also several MeterMaid local_table options take ISO 8601 P arguments.

See also: