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SDMX/DDI Dialogue Session 5



Wednesday 5 October 2011, meeting / telephone conference

Chair:  Steven Vale

Attendees: See list in annex


Item 1: Update on progress on mapping vocabularies


Marco Pellegrino gave an update on work to develop a SDMX technical vocabulary, which aims to define the terms used in the information model. The first draft has now been circulated within the SDMX community for feedback. The next step is to identify relevant DDI terms, and create a combined vocabulary.



Item 2: Update on the development of business cases for collaboration between DDI and SDMX


Alistair Hamilton introduced a draft of the core of the proposed business case document, focusing on harnessing DDI and SDMX to support end-to-end statistical business processes, where the inputs are microdata. Participants gave general feedback on this document, including the importance of appropriate governance. They agreed that it contains all the main elements, but needs to be streamlined.


There was concern that both SDMX and DDI are evolving, making integration more challenging. August Götzfried will request a written statement from the SDMX sponsors in support of the dialogue, to complement that already received from the DDI Alliance. DDI profiles should be identified to support the use cases. Alistair will liaise with Eurostat on the definition of these profiles.



Item 3: Feedback from the Eurostat DDI / SDMX Workshop


Marco Pellegrino gave a report of the workshop hosted by Eurostat on 9 September, in the context of the ESSNet project on SDMX. The main issue for this workshop was the use of SDMX in the early phases of the GSBPM. The main outcomes were that SDMX and DDI were seen as complementary, the two main work areas identified by the SDMX/DDI Dialogue (terminology and business case) were seen as important and should be pursued, and there is a need to link to potential user groups, such as the new OECD group on microdata access.


Item 4: Relations with other international groups and initiatives


The SDMX Action Plan 2011-2015 has been released, and is available via This plan contains an item on the interoperability of SDMX and DDI.


The SDMX Statistical Working Group held its first face-to-face meeting over the previous two days. A work programme has been agreed, and an important topic of discussion was whether the content-oriented guidelines should be de-coupled from the SDMX technical standards, and elevated to a higher level, independent of any technical implementation.



Item 5: How to organise the dialogue in future


The mailing list for the Dialogue has grown to well over 50 people. It was agreed that this number is not really practical for teleconferences. Steven Vale will contact those on the mailing list to see whether they are happy just to receive notification of events and copies of materials by e-mail, or whether they want to be part of a core group that are more actively involved in developing the outputs.


It was also proposed to set up three task teams covering work on vocabularies, the business case, and SDMX / DDI in the context of micro-data access. Those on the mailing list will be given the opportunity to commit to participating actively in these tasks.


Item 6: Next meeting


The timing of the next meeting will be determined when it is known who intends to participate in the core group.

Annex: List of Participants


Achim Wackerow, DDI Alliance

Alice Born, Statistics Canada

Alistair Hamilton, ABS, Australia

Anuja Singh, UNESCO

Arofan Gregory, ODAF

August Götzfied, Eurostat

Brian Buffet, UNESCO

Bryan Fitzpatrick, Rapanea Consulting

Chris Nelson, Metadata Technology

Colin Bowler, Office for National Statistics, UK

Dan Gillman, BLS, USA

Ebbo Petrikovits, Czech Statistical Office

Franck Cotton, INSEE, France

Françoise Dupont, INSEE, France

Guillaume Duffes, INSEE, France

Håkan Linden, Eurostat

Jean-Pierre Kent, CBS, Netherlands

Jenny Linnerud, Statistics Norway

Juan Munoz-Lopez, INEGI, Mexico

Klas Blomqvist, Statistics Sweden

Lars Thygessen, Statistics Denmark

Marco Pellegrino, Eurostat

Mari Kleemola, Data without Boundaries

Mats Bergdahl, Statistics Sweden

Mogens Grosen Neilsen, Statistics Denmark

Tim Dunstan, Statistics Canada

Thérèse Lalor, ABS, Australia

Steve Vale, UNECE