Example:
The temporal datum "20 hours observed duration" has "PT20H"^^xsd:duration as temporal value; the temporal datum "start time" has "2026-03-15T08:00:00Z"^^xsd:dateTime as temporal value.
Iof usage note:
Suitable data types include xsd:duration for durations, xsd:dateTime for time stamps, and xsd:date for calendar dates.
