Public Review for the SDMX 3.0 Technical Specifications

The SDMX Technical Working Group has been tasked by the international organisations sponsoring the SDMX standard (i.e., BIS, ECB, EUROSTAT, IMF, OECD, UN, World Bank) to invite public comments on the candidate version SDMX 3.0 Technical Specifications.

Version 3.0 introduces new features, improvements and changes to the information model, versioning of structures, the web services API and the XML/JSON/CSV transmission formats.

Details of the main changes and new functionalities can be found in the SDMX 3.0 Major Changes summary here.

The public review period extends until July 30, 2021. Please send your comments to the SDMX Technical Working Group at, create an issue on GitHub where all comments are listed, or visit the SDMX 3.0 project website.

SDMX 3.0 Candidate Technical Specifications are available for review

Section 1 – Framework. Introduces the documents and the content of version 3.0.

Section 2 – Information Model. UML model and functional description, definition of classes, associations and attributes.

Section 5 – Registry Specification – Logical Interfaces. Provides the specification for the logical registry interfaces, including subscription/notification and registration of data.

Section 6 – Technical Notes. Provides technical information for implementors.

REST API. The RESTful web services application programming interface specification (GitHub).

SDMX-ML. XML format specifications for exchanging structures, data and reference metadata (GitHub).

The following sections will be available for review by May 31, 2021

SDMX-JSON. JSON format specifications for exchanging structures, data and reference metadata (GitHub).

SDMX-CSV. CSV format specifications for exchanging data and reference metadata (GitHub).

The following sections are obsolete:
Section 3 - SDMX-ML - replaced by the sdmx-twg/sdmx-ml GitHub repository
Section 4 - SDMX-EDI deprecated in version 3.0
Section 7 - API - replaced by the sdmx-twg/sdmx-rest GitHub repository