Standard Annotation

Information that is structured in a predefined way so that exchange partners can understand its content in an unambiguous way, and machines can parse the information and perform a specific action in response.

A drawback of the Annotation construct is that it conveys no semantics. Annotations are containers for additional information relating to the Artefact to which they are attached. This means that for an Annotation to be interpreted in the same way by exchange partners a reference is needed that defines some standard behaviour and implementation. When implemented in systems and applications standard Annotations are often referred to as "actionable Annotations" or "machine-actionable Annotations".

SDMX, "SDMX Glossary Version 2.1"

SDMX, "Guidelines on the Use of SDMX Annotations"