A dedicated task-force of the SDMX Technical Working Group (TWG) submits the new specification of a Validation and Transformation Language (VTL) for public review. The review period extends until 8th November 2014 in order to allow time for consolidation of a final version at the end of 2014. Feedback is welcome.
At the end of 2012, the SDMX Secretariat requested the TWG to start a new work package on “Expressions and Calculations” aimed at allowing the definition and the exchange of validation and transformation rules, based on the generic framework for defining mathematical expressions already existing in the SDMX information model. To make such framework fully operational, a standard language for defining validation and transformation rules (set of operators, their syntax and semantics) should be adopted, while appropriate IT formats for exchanging such rules – and web services to store and retrieve them – should be designed.
The intention is to provide a language which is usable by statisticians to express logical validation rules and transformations on data, whether described as a dimensional table or as unit-record data. Although a work-product of SDMX, the VTL language is based on the GSIM data model and should be usable with other standards as well. The present draft for public review also provides (in its part 1) a formal description of data validation at business level against which information models can be mapped.
VTL – part 1: Validation and Transformation Language (General Description)
VTL – part 2: Validation and Transformation Language (Library of Operators)
Please send your comments to the SDMX Technical Working Group (SDMX-TWG) at firstname.lastname@example.org. Each email message should contain only a limited set of numbered – and possibly homogeneous – comments and should contain the elements indicated in the attached comment log.
Posted on 21 September 2014
The next SDMX Global Conference will be held from 28 to 30 September 2015 at the United Nations Conference Centre in Bangkok. Beside the conference event itself, SDMX capacity building sessions will be organised. The conference agenda and the main topics of the conference will be announced latest at the beginning of 2015.
For any questions, please contact: email@example.com
Posted on 16 September 2014
The Ownership Group for SDMX implementation in Balance of Payments (BOP), Foreign Direct Investment (FDI) and National Accounts (NA) published a fast track change of the data structure definition for Sector Account and Government Finance (NA_SEC) with the new version V1.3 (on 08/08/2014). The current version was missing a code (“NC”) in the code list CL_CONSOLIDATION. This code list is only used in the NA_SEC DSD, thus the other DSDs in the package remain on V1.2. You only need to update to the new DSD, if your data flow requires the code “NC” for CL_CONSOLIDATION. This is not the case for ESA 2010. Thus no change is needed for reporting ESA 2010 tables to Eurostat. The NA_SEC templates are nevertheless re-published with version V1.3a (on 11/08/2014) in order to be aligned with the versioning of the DSD and in order to correct some minor mistakes found by data providers when testing V1.2c of the tables. All templates are fully compatible with V1.2 of the NA_SEC DSD. You will also find some further details in the issue log on the SDMX-NA maintenance page: http://sdmx.org/?page_id=1498
The SDMX Technical Working Group (SDMX-TWG) has produced a new specification for the SDMX-JSON Data Message and submits it for public review.
Specification (authoritative): sdmx-json-data-message.pdf
HTML version of the specification, sample messages and informative JSON Schema: samples-tools.zip
The public review period for this specification extends until 31st October 2014 in order to allow time for implementation. Please send your comments to the SDMX Technical Working Group (SDMX-TWG) firstname.lastname@example.org. Each email message should contain only one comment. Feedback is welcome.