The SDMX Glossary is an SDMX guideline containing concepts and related definitions that are useful for building and understanding data and metadata exchange arrangements based on the SDMX (Statistical Data and Metadata eXchange) ISO 17369 standard. It is recommended as a single entry point to a common SDMX terminology to be used in order to facilitate communication and understanding of the standard. In short, the overall message of the glossary is the following: if a term is used, then its precise meaning should correspond to the SDMX Glossary definition, and any reference to a particular phenomenon described in the SDMX Glossary should use the appropriate term.