Definition: A specific data set, metadata set, database or metadata repository from where data or metadata are available.
Context: The source of data is often used as a synonym for the term "data provider". However, in the context of SDMX the latter term refers to the organisation or individual from where statistics are obtained. The term "data source" can also refer to the characteristics and components of the raw statistical data used for compiling statistical aggregates. Sources can be distinguished, according to the modality of data collection, in:
a) administrative (for data coming from administrative records);
b) survey (for data coming from surveys for a specific sector or institutional unit
Source: OECD Glossary of Statistical terms, OECD.