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Implementing SDMX exchange of national development indicators
SDMX Expert Group Meeting, Paris, 13 – 14 September 2012
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UNSD-DFID Project
1. Introduction
2. Progress on country SDMX
3. Design
4. Key issues
5. Questions & discussion
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Introduction: Objectives• Improve the coherence and clarity of dev’t indicators
- Improve coordination in the NSS- Collate development data in 1 place/database- Explain differences between intl. & nat. data
• Improve accessibility and visibility- Make access to national data easier- Draw attention to wider set of indicators- Reduce data request burden
• Enhance knowledge- Strengthen IT support- Use of latest IT software & practices- Training & study tours
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Introduction: Background
• Implementation in 11 countries across Africa and Asia
• A pilot ran during 2008-2009, full phase started in late 2010
• All countries initiated now, 5 countries started implementing and 5 about to start.
• Project runs until Jul 2014
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Progress on country SDMXCambodia : SDMX registry installed & mappings of 46 time series complete/ available (with further 175 time series identified for mapping)
Burundi : SDMX registry installed
Rwanda : Expanded SDMX registry
Lao & Uganda : Expanded SDMX registry & mapping tool
May 2011
Feb 2012
Jun 2012
Planned to Dec 2012
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Design: Overview
• Most project countries are unfamiliar with SDMX– Many do not have experience with underlying
technologies such as XML, XSLT.
• Conflicting pressures on project solution:– Must be simple to use, to facilitate its
adoption– Must be powerful, to fulfill requirements– Must give the user a chance to familiarize
themselves with SDMX.
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Design: SDMX solution
• Some of the ways in which project solution simplifies the implementation of SDMX:
– Automated mapping between DevInfo database structures and CountryData DSD
– Automated data export from DevInfo database into CountryData SDMX
– Automated publication of data and registration of datasets at a DevInfo registry.
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Design: System
Line Ministries National Statistical Office United Nations
Line Ministry
Database
National Indicator Registry
National Repository DB
DevInfo
Upload
XLS
Scripts
Register files
Post notification
Publish
SDMX-MLDownload
Mapping tool
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Design: SDMX add-ons
• Project works with DevInfo to expand functionality offered by DevInfo registry and offer such new features as:
– User-defined dataflows, metadataflows, and provision agreements
– Constraints
– Metadata discovery and other Web service functionality.
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Design: MDG DSD• Supports exchange of MDG Indicator data
between international agencies (UN, UNICEF, UNESCO, …)
• Developed by SDMX Task Team of Interagency and Expert Group on Development Indicators (IAEG)
• Implemented in SDMX 2.0• CountryData DSD is based on the MDG DSD.
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Design: CountryData DSD• Codelists amended to support non-MDG
development indicators published by countries• To avoid confusion and clearly separate national
and international data, a new DSD with its own ID was defined for the project, which reuses MDG artefacts as much as possible.
• Codelists are currently maintained by UNSD– New indicators proposed by project countries
are introduced with a lag– Centralised codelist maintenance
unsustainable in the long run as more countries join the project.
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Design: CountryData MSD• Based on the MDG global database, agreed by
the IAEG (i.e. definition, method of computation etc.).
• Attachment at the indicator level
• Key to understanding differences between international estimates and country estimates of the same indicator
• Also benefits in consistency, transparency, reporting burden, …
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Key issues: Codelist maintenance• Codelist maintenance must eventually be
taken over by the countries– Compatibility becomes an issue.
• Design under consideration envisages using constrained dataflows to maintain compatibility.
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Key issues: Matching• Trying to match a country indicator with an
available indicator code
• At what point is a new code required
• i.e. For the indicator “Using improved drinking water / sanitation” does measurement on a household basis rather than population make it different indicators?
• Or using Gross instead of Net to calculate Gender Parity Indices make them a separate indicators?
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Key issues: Mapping• Process of mapping the indicator time series
to other dimensions (i.e. Sex, Age group, Location etc.)
• Complicated by the fact that MDG and other development indicators vary greatly in their dimensionality
• Further guidance developed to ensure codelist items are applied properly
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Key issues: Metadata exchange• Metadata is usually not comprehensive
enough to understand comparability.
• The importance of good metadata (and even what it is?) is little understood within some National Statistical Systems.
• Few examples of metadata exchange using SMDX
• Format issues: HTML vs. Plain Text, Presentation vs. security.
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Key questions
• Project Sustainability− Sharing national development indicators in
SDMX− Commitment to maintaining good metadata
• Governance− Managing structural metadata among
multiple national and international organizations
• Expansion– System used for greater sharing between
different parties.
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Thank you for your attention
http://unstats.un.org
Sources of further reference:
http://data.un.org/countrydata
http://nd.nis.gov.kh/registry/Cambodia SDMX Registry
Rwanda SDMX Registry
http://sdmx.statistics.gov.rw/