Copyright 2009 Digital Enterprise Research Institute. All rights reserved.

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Self-Service Linked Government Data with dcat and Gridworks

Fadi Maali, Richard Cyganiak, Vassilios PeristerasTriplification Challenge 2010 at I-Semantics, Graz

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Raw data catalog, data.gov

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Government data catalogs worldwide

http://datos.fundacionctic.org/sandbox/catalog/map

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We want governments to provide Linked Data,

not just Raw Data

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From Raw Data to Linked Data

Formats Vocabularies Stable URIs Hosting/resolvability Interlinking Reconciliation/deduplication

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We want governments to provide Linked Data,

not just Raw Data

Digital Enterprise Research Institute www.deri.ie

We want governments to provide Linked Data,

not just Raw DataTim

e

Money

Skills

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DIY

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dcatData Catalog Vocabulary

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Government data catalogs worldwide

http://datos.fundacionctic.org/sandbox/catalog/map

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Survey of data catalogs

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Survey of data catalogs

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dcat Vocabulary

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dcat at W3C

dcat Task Force Part of W3C eGovernment Interest Group http://www.w3.org/egov/wiki/Data_Catalog_Vocabulary

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Four catalogs in SPARQL

http://lab.linkeddata.deri.ie/govcat/US, Australia, London, SF

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Gridworks

Made by David Huynh at Metaweb (now Google) Explore, clean up and improve tabular data Desktop app http://code.google.com/p/freebase-gridworks/

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Gridworks

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Extending Gridworks

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Extension I: Browse dcat in Gridworks

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Extension I: Browse dcat in Gridworks

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Extension II: RDF export

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Extension II: RDF export

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Next steps

1. Reconciliation across datasets2. Share the mappings3. Linked Data hosting

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Summary

dcat RDF vocabulary for government data catalogs W3C eGovernment Interest Group

Gridworks Great workbench for tabular data Extensible!

RDF export for Gridworks http://bit.ly/gridworks-rdf