Referential metadata or quality reports, describe concepts and statistical methods used to collect and generate data. They also provide information on data quality. Thus, they assist user in correctly interpreting statistical information.
Currently INSTAT is using two standards to document referential metadata: ESMS (Euro SDMX Metadata Structure) and ESQRS (ESS Standard Quality Report Structure), that are the main reference metadata reporting standards used within the ESS.
The purpose of the ESMS files is to document the methodologies, the quality aspects, and the statistical production processes in general and ESQRS files provide users with detailed information for assessing the quality of the data.