Linked Data Pieter Colpaert en Laurens De Vocht [email protected] en [email protected] 

Once, this was great data 

Linked Data what? Because it’s impossible to store all the world’s knowledge on 1 machine… 

An example Earth is the same as The world Earth is a Planet The world has population 7.152 billion Machine 1 Machine 2 Machine 3 World Wide Web And a lot more facts And a lot more facts And a lot more facts 

World Wide Web An example Earth is the same as The world Earth is a Planet The world has population 7.152 billion Machine 1 Machine 2 Machine 3 

name type same as Population Earth Planet The World 7.125*109 The World Planet Earth 7.125*109 { “Earth” : { “type” : “Planet”, “same as” : “The World”, “population” : “7.125*109” } } Planet The World 7.125*109 ; “The World” ; “7.125*109” . Table / CSV / Spreadsheet JSON XML triples Nothing new… Here’s the answer serialized in different formats 

Problem Earth is a Planet How do we make sure “Earth” means planet Earth on another machine as well? semantic interoperability and the relation “is a”? and “Planet”? 

Solution? http://dbpedia.org/resource/Earth http://www.w3.org/1999/02/22-rdf-syntax-ns#type http://dbpedia.org/ontology/Planet Uniform Resource Identifiers (URIs) 

Solution! Linked Open Data cloud 

So... How do we start publishing data on the Web? 

5 stars of Linked Open Data What state is your data in? 1. Open Data license 

data.OpenDataForum.info 1. Open Data license 

5 stars of Linked Open Data 2. Machine Readable 

5 stars of Linked Open Data 3. Open Format (CSV, JSON, ...) 

TheDataTank.com: getting the best out of every star 

5 stars of Linked Open Data 4. Use URIs (RDF) 

Add links in your data with rml.io 

5 stars of Linked Open Data 5. Link your datasets to others 

Integrated at data.opendataforum. info Time check? 

Okay… and now? Let’s http://ewi.mmlab.be/query the Web 

Questions?