Period - Collection (SDMX: CL_TIME_PER_COLLECT)

This classification provides a list of values to represent dates or periods during which observations have been collected in order to calculate the indicator for the target reference period. This classification was formally adopted on 15 April 2015. For more information about this classification and SDMX classifications in general (e.g. list of generic codes to express general concepts such as "Total", "Unknown", etc.; syntax for the creation of codes, general guide for the creation of SDMX classifications), you can consult this link.