Copyright 2011 Digital Enterprise Research Institute. All rights reserved.

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Enabling Networked Knowledge

DcatMachine Accessible Catalogue

Fadi Maali

Digital Enterprise Research Institute www.deri.ie

Enabling Networked Knowledge

Dataset

http://www.dublinked.ie/datastore/index.php

Digital Enterprise Research Institute www.deri.ie

Enabling Networked Knowledge

Machine Accessible

https://scraperwiki.com/scrapers/dublinked_datasets/

Digital Enterprise Research Institute www.deri.ie

Enabling Networked Knowledge

Eg1 – Federated Catalog

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

Digital Enterprise Research Institute www.deri.ie

Enabling Networked Knowledge

Dcat

http://dvcs.w3.org/hg/gld/raw-file/default/dcat/index.html

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 …

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

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>

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>

Digital Enterprise Research Institute www.deri.ie

Enabling Networked Knowledge

Distilling

http://www.w3.org/2007/08/pyRdfa/