Data and metadata exchange
System of communication used by a particular community or country. In some cases, although they are called in the same way, languages have some variations between different communities or countries which are locales in the SDMX information model. The most common used standards to classify languages are ISO 639-1, ISO 639-2/T, ISO 639-2/B, ISO-639-3; ISO 639-1 use two letters codes and the others use three letters.
SDMX Glossary 2018