Open time interval definition

[jfabius]

The phenomenonTime, resultTime (and validTime) of Datastreams and Observations can be defined as a time interval, following ISO8601.

For our application, it would be very useful to define open intervals. The ISO8601-2:2019 extension (see wikipedia) of the iso standard defines an open interval by using ".." (two dots).

As far as I understand the open interval definition has not been implemented in FROST. Or is it? If it is not, could it be implemented, and if so, when might it be implemented?

[hylkevds]

Currently FROST does not allow open ended intervals.
It could be implemented, but there are currently no plans for this. It's not a trivial feature, since the interaction of open intervals with all query features that deal with time, need to be validated.