In the FMS there are two native data types to persist changing data: Metric and StringObservation, and the cartridge generally uses Metric to persist number values and StringObservation to persist String like values.
In the case of "User Defined Collection", the cartridge uses the FMS Metric to persist a number like value, and uses StringObservation to persist Date value (Date convert to String). The configuration is saved in Secondary ASP:
When saved, the UDC configuration once clicked again to display its details, directly displays the "StringObservation".
