what is sdmx-rdf?
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Copyright 2009 Digital Enterprise Research Institute. All rights reserved.
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What is SDMX-RDF? Richard Cyganiak (@cygri), DERI, NUI Galway
ODaF meeting, Tilburg, 7 July 2010
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A proposed standard for publishing statistical data and metadata
according to the Linked Data principles, based on SDMX
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Agenda
1. Statistical linked data with SCOVO
2. SDMX-RDF goals and overview 3. SDMX-RDF roadmap
4. Questions to you
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SCOVO Statistical Linked Data
with
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SCOVO
http://sw.joanneum.at/scovo/schema.html
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SCOVO Overview
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SCOVO use
Riese (Eurostat) http://riese.joanneum.at/
LOIUS (Italian university statistics) http://sw.unime.it/loius/info.html
German Environment Speciman Bank http://www.umweltprobenbank.de/en/documents
UK government data http://www.jenitennison.com/blog/node/132
voiD, RDFstats http://vocab.deri.ie/void/guide#sec_3_Expressing_dataset_statistic
http://rdfstats.sourceforge.net/
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But …
1. Publishing statistics as linked data is a recurring task
2. SCOVO has severe limitations
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SDMX-RDF Goals and Overview
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Goals
Purpose Dissemination of statistics over the Web as linked data
Top requirements High-fidelity representation of statistical information
Linking with other information assets
Re-use of artifacts
Non-goals Collection of statistics
Reporting of statistics
Validation of completeness, timeliness etc
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SDMX: Information model + syntaxes
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SDMX: Information model + syntaxes
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Scope
Data Set Y
Cross-Sectional Data Set (Y)
Data Structure Definition Y Codelist Y
Metadata Set Y?
Metadata Structure Def. Y?
Maintenance Agency Y
Dataflow Definition (Y)
Metadataflow Definition (Y)
Data Provider (Y)
Provision Agreement (Y)
Constraints –
Category Scheme Y Concept Scheme Y
Structure Set –
Reporting Taxonomy ?
Process –
Registry –
Content-Oriented Guidelines Y
Expressible SDMX concepts
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Publishable artifacts in SDMX-RDF
A data set can draw upon artifacts published by any number of different parties
Data structure definitions Code lists (URI sets, SKOS vocabularies)
Property collections Concept lists
…
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SDMX Content-Oriented Guidelines
Cross-Domain Concepts SKOS Property collection Cross-Domain Code Lists SKOS
Subject-Matter Domains SKOS
Metadata Common Vocabulary –
RDF representations of COGs
Example URIs http://purl.org/linked-data/sdmx/2009/concept#currency
http://purl.org/linked-data/sdmx/2009/code#freq-M
http://purl.org/linked-data/sdmx/2009/subject#2.4.5
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Linked Data in SDMX-RDF
Use of existing URI sets and SKOS vocabularies as code lists
Make code lists available on the web for non-SDMX re-use (as SKOS vocabularies)
Concepts and properties shared between data sets
Everything has a URI and can be linked to
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Roadmap
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Disseminating an RDF vocabulary
Clear use case 100%
Solid design 90% Specification 50%
Tutorials 50% Reference deployments 25%
Converters from popular existing formats 10%
Reference data browser/visualiser 0% Great website 0%
Big-name users 20%
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Questions
to you
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Questions
Name? Scope is smaller than SDMX-ML and SDMX-EDI
Interest from the SDMX user community? So far, SDMX-RDF has been driven by linked data
community
We need SDMX expertise and early adopters
Scope check
How does your organisation re-use concepts, code lists, and data structure definitions?
Do you have example SDMX data for us? Reality check
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Thank you! [email protected]
@cygri http://www.slideshare.net/cygri/what-is-sdmxrdf-4696043