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Understand the importance of metadata layers to enhance data comprehension. Learn how to structure country data, exchange metadata, and map information effectively using MSD and DevInfo platforms. Explore step-by-step guidance on metadata mapping and maintenance processes.
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CountryDataSDMX forDevelopment Indicators Metadata in DevInfo: Creation, Mapping and Registration
Metadata • According to the ISO; • “Metadata is data that defines and describes other data.” • Perhaps, better visualized as layers within a pyramid. • Information describing the data is more detailed as one moves down from the top of the pyramid.
“Structural” metadata • At the top of the pyramid is information essential for understanding the data • Needs to explain the ‘basics’ of when, where, who and what?
Reference metadata 2. In the middle are explanatory notes and text generally located in the same “publication” provides a good description of the statistics • definitions, key issues, limitations, etc., that can impact on the use of the data.
Methodological metadata • 3. Detailed methodological information disseminated in publications / websites. • These are potentially the source of the most detailed methodological information available. • Some statistical agencies publish very detailed concepts, sources and methods for a number of their key statistics.
CountryData Metadata Structure Definition (MSD) background • Developed by UNSD for CountryData • Supports exchange of CountryData Indicator metadata between countries and UNSD • Implemented in SDMX 2.0 • Design to exchange higher level reference metadata • Latest version (1.0) finalised in Dec 2012
DevInfo (Di) background • Data and metadata dissemination software supported and promoted by UNICEF • DevInfo7 (Di7) launched in Nov 2012 • 7 out of 11 project countries plan to share metadata through DevInfo • Good support for metadata collation and exchange.
Mapping to the MSD • Metadata mapping from DevInfo to MSD is much simpler than data mapping. • MSD structure is simpler and no part is mandatory. • Expectation that at least “Definition”, “Method of Computation” and “Process of obtaining data” are available.
Di Mapping Tool: Introduction Once the metadata is entered into the database, then can use “DX Remote Access” to update di7 web-based software in same way as data Once metadata exists in di7 web then metadata can be mapped and published which conforms with the CountryData MSD. Like for data, this is all done online through the di7 web-based repository through the administration profile, so let’s begin…
Metadata mapping • To map metadata, • First, map the associated time series through (1st stage) codelist and (2nd stage) IUS • Once this is complete move to mapping metadata
Exercise: Publish metadata • Use unstats.un.org/unsd/demodiweb[1-6] • Username = webmaster@xyz.com • Password = support@2012 • Publish/ register the time series for • “Maternal mortality ratio (MMR)” • “Employment to population ratio” • “Share of women in wage employment in the non-agricultural sector” • “Infant mortality rate” • “Land under forest cover”
MSD Maintenance • The mapping and registry tool allows users to edit and delete the MSD (has to be packaged with the DSD and uploaded in DevInfo). • For when the MSD is updated, it is recommended to edit the DSD/MSD rather than delete • MSD/DSD deletion has the effect of removing all the mappings and subscriptions used for that MSD/DSD
