Linked Data: A 30-Minute Crash Course! Tom Heath Lead Researcher - - PowerPoint PPT Presentation

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Linked Data: A 30-Minute Crash Course! Tom Heath Lead Researcher - - PowerPoint PPT Presentation

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shared innovation Linked Data: A 30-Minute Crash Course! Tom Heath Lead Researcher Talis Systems Ltd July 2011, SSSW2011, Cercedilla, Spain shared innovation Outline No hard sell about Linked Data, just the basic concepts A

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Linked Data: A 30-Minute Crash Course!

Tom Heath

Lead Researcher Talis Systems Ltd

July 2011, SSSW2011, Cercedilla, Spain

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Outline

  • No “hard sell” about Linked Data, just the basic

concepts

  • A basic introduction to the topic

– Graphs – RDF Triples – URIs for documents and things – Links between (things in different) data sets

  • A brief mention of some useful data sets
  • Outline of the hands-on session
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Tom

What is a Graph?

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Tom Talis

What is a Graph?

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Tom Talis employedBy

What is a Graph?

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Tom Bristol Talis employedBy livesIn

What is a Graph?

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Tom Bristol Talis Ardbeg employedBy livesIn favouriteDrink

What is a Graph?

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Tom Bristol Talis Ardbeg Whisky employedBy livesIn favouriteDrink isA

What is a Graph?

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Tom Bristol Talis Ardbeg Islay Whisky employedBy livesIn favouriteDrink isA

  • rigin

What is a Graph?

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Tom Bristol Talis Ardbeg Islay Whisky employedBy livesIn favouriteDrink isA

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Scotland isIn

What is a Graph?

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Tom Bristol Talis Ardbeg Islay Whisky employedBy livesIn favouriteDrink isA

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Software industry Scotland isIn

What is a Graph?

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Tom Bristol Talis Ardbeg Islay Whisky employedBy livesIn favouriteDrink isA

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Software industry Birmingham basedIn Scotland isIn

What is a Graph?

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Tom Bristol Talis Ardbeg Islay Whisky employedBy livesIn favouriteDrink isA

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Software industry Ian Davis employedBy Birmingham basedIn Scotland isIn

What is a Graph?

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Tom Bristol Talis Ardbeg Islay Whisky employedBy livesIn favouriteDrink isA

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Scotland isIn Software industry Birmingham basedIn Ian Davis employedBy England bornIn

What is a Graph?

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Tom Bristol Talis Birmingham England Ian Davis Ardbeg Islay Software Scotland Whisky employedBy livesIn favouriteDrink isA

  • rigin

isIn borders basedIn industry employedBy bornIn

What is a Graph?

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Tom Bristol Talis Birmingham England Ian Davis Ardbeg Islay Software Scotland Whisky employedBy livesIn favouriteDrink isA

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isIn borders basedIn industry employedBy bornIn City isA

What is a Graph?

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Tom Bristol Talis Birmingham England Ian Davis Ardbeg Islay Software Scotland Whisky employedBy livesIn favouriteDrink isA

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isIn borders basedIn industry employedBy bornIn City isA isA

What is a Graph?

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Tom Bristol Talis Birmingham England Ian Davis Ardbeg Islay Software City Scotland Whisky employedBy livesIn favouriteDrink isA isA isA

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isIn isIn isIn borders basedIn industry employedBy bornIn

What is a Graph?

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Subject Object Predicate

The RDF Data Model: Triples

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Tom Talis employedBy

The RDF Data Model: Triples

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Tom Bristol Talis Birmingham England Ian Davis Ardbeg Islay Software City Scotland Whisky employedBy livesIn favouriteDrink isA isA isA

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isIn isIn isIn borders basedIn industry employedBy bornIn

1 Graph, 15 RDF Triples

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Birmingham England Ian Davis Islay Software City Scotland Whisky isA isA

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isIn isIn isIn borders basedIn industry employedBy bornIn isA Bristol livesIn Ardbeg favouriteDrink Talis employedBy Tom

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isIn Birmingham England Ian Davis Software City isA isA isIn isIn borders basedIn industry employedBy bornIn Bristol livesIn favouriteDrink Talis employedBy Tom Scotland Whisky Islay

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isA Ardbeg

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isIn England Ian Davis City isA isA isIn isIn borders employedBy bornIn Bristol livesIn favouriteDrink employedBy Tom Scotland Whisky Islay

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isA Ardbeg Birmingham Software basedIn industry Talis

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isIn England City isA isA isIn isIn borders Bristol livesIn favouriteDrink employedBy Tom Scotland Whisky Islay

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isA Ardbeg Birmingham Software basedIn industry Ian Davis employedBy bornIn Talis

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livesIn favouriteDrink employedBy Tom Whisky

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isA Ardbeg Software industry Ian Davis employedBy bornIn Talis basedIn City isIn England isA isA isIn isIn borders Bristol Scotland Islay Birmingham

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Birmingham England Ian Davis Islay Software City Scotland Whisky isA isA

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isIn isIn isIn borders basedIn industry employedBy bornIn isA Bristol livesIn Ardbeg favouriteDrink Talis employedBy Tom h t t p : / / t

  • m

h e a t h . c

  • m

/ t

  • m

. r d f

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isIn Birmingham England Ian Davis Software City isA isA isIn isIn borders basedIn industry employedBy bornIn Bristol livesIn favouriteDrink Talis employedBy Tom Scotland Whisky Islay

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isA Ardbeg http://wiskii.com/ardbeg.rdf

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isIn England Ian Davis City isA isA isIn isIn borders employedBy bornIn Bristol livesIn favouriteDrink employedBy Tom Scotland Whisky Islay

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isA Ardbeg Birmingham Software basedIn industry Talis http://www.talis.com/talis.rdf

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isIn England City isA isA isIn isIn borders Bristol livesIn favouriteDrink employedBy Tom Scotland Whisky Islay

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isA Ardbeg Birmingham Software basedIn industry Ian Davis employedBy bornIn Talis http://iandavis.com/ian.rdf

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livesIn favouriteDrink employedBy Tom Whisky

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isA Ardbeg Software industry Ian Davis employedBy bornIn Talis basedIn City isIn England isA isA isIn isIn borders Bristol Scotland Islay Birmingham http://geonames.org/uk.rdf

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Talis Birmingham England Ian Davis Software City employedBy isA isA isIn basedIn industry employedBy bornIn isIn borders http://wiskii.com/Ardbeg http://plac.es/Bristol http://tomheath.com/id/me http://wiskii.com/Islay http://plac.es/Scotland http://drin.kr/Whisky http://worklife.eg/livesIn http://drin.kr/favouriteDrink http://rels.com/isA http://wiskii.com/origin http://rels.com/isIn

URIs for All Things (Not Just for Documents)

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livesIn favouriteDrink employedBy Tom Whisky

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isA Ardbeg Software industry Ian Davis employedBy bornIn Talis basedIn City isIn England isA isA isIn isIn borders Bristol Scotland Islay Birmingham Islay

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isA Ardbeg

Talking About the Same Thing

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livesIn favouriteDrink employedBy Tom Whisky

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isA Ardbeg Software industry Ian Davis employedBy bornIn Talis basedIn City isIn England isA isA isIn isIn borders Bristol Scotland Birmingham http://my.eg/Islay http://your.eg/Islay

  • wl:sameAs

Talking About the Same Thing

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Useful Data Sets

  • Dbpedia: RDF descriptions of everything that has a

Wikipedia page <http://dbpedia.org/>

  • Geonames: data set about geographic locations,

with RDF descriptions <http://geonames.org/>

  • owl:sameAs links exist between many places that

feature in both DBpedia and Geonames

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Anatomy of a Simple Linked Data Application

  • 1. Look up a URI (HTTP GET)
  • 2. Receive some RDF data in response

(maybe via a redirect)

  • 3. Do something useful with the data
  • 4. Inspect the data for links to related things
  • 5. Look up the URIs of related things
  • 6. Go to Step 2.
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Linked Data Hands-On Session

  • Build a simple city guide based on existing Linked

Data sources

  • Start with a seed URI for a city of your choice
  • Populate a SimpleGraph object with data retrieved

by looking up this URI

  • Look for outgoing links in the data
  • Look these up and add the resulting data to your

SimpleGraph / Thing object

  • Show some/all of the data you have retrieved as a

Web page city guide

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Instructions

  • http://tomheath.com/stuff/sssw2011/
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Questions?

  • Contact Info

– tom.heath@talis.com – http://tomheath.com/id/me – http://www.talis.com/ – @tommyh (twitter)

  • Slides

– http://tomheath.com/slides/2011-07-cercedilla- linked-data-a-30-minute-crash-course.pdf

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