2 General Notes on This Document

As of version SDMX 2.1, the term "Key family" has been replaced by Data Structure Definition (also known and referred to as DSD) both in the XML schemas and the Information Model. The term "Key family" is not familiar to many people and its name was taken from the model of SDMX-EDI (previously known as GESMES/TS). The more familiar name "Data Structure Definition" which was used in many documents is now also the technical artefact in the SDMX-ML and Information Model technical specifications. The SDMX-EDI specification, that was using the term "Key family", is deprecated in this version of the specification.

There has been much work within the SDMX community on the creation of user guides, tutorials, and other aids to implementation and understanding of the standard. This document is not intended to duplicate the function of these documents, but instead represents a short set of technical notes not generally covered elsewhere.