Download - Dcat - Machine Accessible Data Catalogues
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Copyright 2011 Digital Enterprise Research Institute. All rights reserved.
Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
DcatMachine Accessible Catalogue
Fadi Maali
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Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Dataset
http://www.dublinked.ie/datastore/index.php
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Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Machine Accessible
https://scraperwiki.com/scrapers/dublinked_datasets/
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Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Eg1 – Federated Catalog
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Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Eg2 - Advanced queries against/across catalogs
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
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Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Dcat
http://dvcs.w3.org/hg/gld/raw-file/default/dcat/index.html
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Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Status of dcat
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 …
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Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Who is using dcat?
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
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Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Dcat as RDFa (1/2)
<div class=“metadata” > <div class="metadata-line"> <div class="metadata-tag">Title</div> <div class="metadata-content">Objective_A1</div> </div></div>
http://www.dublinked.ie/datastore/metadata031.php
<div class=“metadata” about="http://www.dublinked.ie/dataset/126" typeof="dcat:Dataset" > <div class="metadata-line"> <div class="metadata-tag">Title</div> <div class="metadata-content“ property="dct:title">Objective_A1</div> </div></div>
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Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Dcat as RDFa (2/2)
<div class="metadata-line"> <div class="metadata-tag">Download Links</div> <div class="metadata-content“> <a href="http://www.dublinked.ie/...filename...1246.shx"></a> </div></div>
<div class="metadata-line"> <div class="metadata-tag">Download Links</div> <div class="metadata-content“ rel="dcat:distribution" > <a typeof="dcat:Distribution" rel="dcat:accessURL" property="dct:format" content=“shx" href="http://www.dublinked.ie/...filename...1246.shx"></a> </div></div>
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Digital Enterprise Research Institute www.deri.ie
Enabling Networked Knowledge
Distilling
http://www.w3.org/2007/08/pyRdfa/