TimeStamp Value
Each DeviceState list may optionally include a TimeStamp element so that the device can record the time at
which the operational states were measured, when known. The (string)
ISO 8601 time format (external) must be used to report:
An unqualified local time e.g.
2016-03-04T17:45:31.1234567, which corresponds to17:45:31.1234567local time on4th March 2016.A local time including the UTC time and a time zone offset e.g.
2016-03-04T17:45:31.123456+05.30for the India Standard Time zone (+5.5 hours), which corresponds to23:15:31.1234567local time on4th March 2016.A UTC time using the Z time-zone designator e.g.
2016-03-04T17:45:31.1234567Z, which corresponds to17:45:31.1234567UTC on4th March 2016.