Apart from the standard members of the Tago structure ( variable, value, time, unit etc) it would be useful to support additional member called ‘quality’. This would indicate that a variable is OFFLINE ( e.g one of the sensor’s device is broken) , OVERFLOW (a value from the sensor is behind the range) or simply VALID (no problem with datapoint) etc.

How to indicate on the dashboard that the datapoint has a poor quality due some reason (eg. with different color) ?