The significant part of the request is: /api/dataValueSets.json?children=true&dataElementGroup=v10sme9MjPS&orgUnit=QoptHf4izj7&lastUpdatedDuration=150d
Where is this ‘unit of measurement’ defined? Do you mean to get the data type of the data element for that value? You’d need to retrieve the data type from the data elements’ endpoint.
If you could provide more info and example please… and more importantly, explain what is meant by ‘unit of measurement’.