Dcat - Machine Accessible Data Catalogues

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  • 1. Digital Enterprise Research Institute www.deri.ie Dcat Machine Accessible Catalogue Fadi Maali Copyright 2011 Digital Enterprise Research Institute. All rights reserved. Enabling Networked Knowledge
  • 2. DatasetDigital Enterprise Research Institute www.deri.ie http://www.dublinked.ie/datastore/index.php Enabling Networked Knowledge
  • 3. Machine AccessibleDigital Enterprise Research Institute www.deri.ie https://scraperwiki.com/scrapers/dublinked_datasets/ Enabling Networked Knowledge
  • 4. Eg1 – Federated CatalogDigital Enterprise Research Institute www.deri.ie Enabling Networked Knowledge
  • 5. Eg2 - Advanced queries against/across catalogsDigital Enterprise Research Institute www.deri.ie  All CSV datasets that is published by the city council and was updated in the last week  All XML datasets that are about education and published by a local authority Enabling Networked Knowledge
  • 6. DcatDigital Enterprise Research Institute www.deri.ie http://dvcs.w3.org/hg/gld/raw-file/default/dcat/index.html Enabling Networked Knowledge
  • 7. Status of dcatDigital Enterprise Research Institute www.deri.ie  Being worked on at the W3C Government Linked Data Working Group  Will (hopefully) be put on the W3C standardization track  Goal: when someone wants to publish catalogue data in RDF, dcat will be his choice  more adoption  more usefulness  more adoption  more usefulness … Enabling Networked Knowledge
  • 8. Who is using dcat?Digital Enterprise Research Institute www.deri.ie  data.gov.uk (RDFa) http://data.gov.uk/dataset/financial-transactions-data-the- pennine-acute-hosiptals-nhs-trust-0  semantic.ckan.net (SPARQL endpoint) http://semantic.ckan.net/snorql/  Publicdata.eu (RDFa, SPARQL) http://publicdata.eu/dataset/02-bve-onderwijspersoneel- in-fte--ministerie-van-ocw  Barcelona, Gijón, Catalonia, Balearic Islands, Saragossa Enabling Networked Knowledge
  • 9. Dcat as RDFa (1/2)Digital Enterprise Research Institute www.deri.ie <div class=“metadata” <div class=“metadata” > about="http://www.dublinked.ie/dataset/126" typeof="dcat:Dataset" > <div class="metadata-line"> <div class="metadata-line"> <div class="metadata-tag">Title</div> <div class="metadata-tag">Title</div> <div class="metadata-content">Objective_A1</div> </div> class="metadata-content“ property="dct:title">Objective_A1</div> <div </div> </div> </div> http://www.dublinked.ie/datastore/metadata031.php Enabling Networked Knowledge
  • 10. Dcat as RDFa (2/2)Digital Enterprise Research Institute www.deri.ie<div class="metadata-line"> <div class="metadata-tag">Download Links</div><div class="metadata-line"> <div class="metadata-content“ rel="dcat:distribution" > <div typeof="dcat:Distribution" rel="dcat:accessURL" <a class="metadata-tag">Download Links</div> <divproperty="dct:format" content=“shx" class="metadata-content“> <ahref="http://www.dublinked.ie/...filename...1246.shx"></a> href="http://www.dublinked.ie/...filename...1246.shx"></a> </div> </div></div></div> Enabling Networked Knowledge
  • 11. DistillingDigital Enterprise Research Institute www.deri.ie http://www.w3.org/2007/08/pyRdfa/ Enabling Networked Knowledge