Concept: Fortnightly average/mean in the primaryObservation vocabulary

Concept URI	http://dd.eionet.europa.eu/vocabulary/aq/primaryObservation/fortnight
Preferred label	Fortnightly average/mean
Definition	The average or mean derived from a sample over the period of 2-weeks. The duration will be defined by the startTime & endTime components of the data array.
Notation	fortnight
Status	Valid
Status Modified	2013-12-31
Accepted Date	2013-12-31
Not Accepted Date