introduction to linked open data

Linked Open Data

An extremely high level view!

by@asaletourneau

July 2011

So what is it?

Simply put (by someone else):

“The expression ‘Linked Data’ is used to describe a method of exposing, sharing, and

connecting data on the web”

(http://consulting.talis.com/case-study/ordnace-survey-open-data)

LODLAM

http://lod-lam.net/summit/about/

It’s an unconference dude!!

http://www.flickr.com/photos/captsolo/5790930338/

What does this man and this band have in common?

They both appear as linked data on the internet!

What do these two things have in common?

MelbourneBearbrass

They are different names for the same geographic location, and they appear on the internet as linked open data...but I digress.

First things first…

An introduction to the semantic web

http://youtube.com/watch?v=OGg8A2zfWKg

Some insightful words on linked open data by Dr Tim Sherratt

http://www.slideshare.net/wragge/a-hopefully-fairly-painless-introduction-to-linked-open-data

http://discontents.com.au/foaf.rdf(Tim’s explanation of the ‘things’ he’s about using the foaf

ontology)

http://ow.ly/i/dZWu/original(my visualisation of the foaf excerpt above using

http://semweb.salzburgresearch.at/apps/rdf-gravity/)

How do we describe data e.g. people, places, events, thoughts, feelings, images, twitter accounts to a machine?

• We need ontologies, formats, a way of uniquely identifying things, and a way of making these things discoverable over the internet

• If we do this we can start to make assertions about things that describe them in terms that machines can understand

• Then machines can help us link all this data together so that the internet becomes one big global database of human knowledge

Ontologies?

http://schemapedia.com

Formats?RDF describes resources with classes, properties, and

values

e.g. Asa is a person with a weight of x kgs

http://www.w3schools.com/rdf/rdf_intro.asp

Linked Open Data Five Star Rating Scheme

http://www.w3.org/DesignIssues/LinkedData.html

Linking Open Data cloud diagram

http://richard.cyganiak.de/2007/10/lod

Examples please of real world applications!!!!!!

http://wiki.dbpedia.org/About

http://dbpedia.neofonie.de/browse/

http://visualdataweb.org/relfinder/relfinder.php

But wait there’s more!

http://www.europeana.eu/portal/aboutus.html

http://www.europeana.eu

http://www.europeana.eu/portal/thoughtlab.html

And what about Australia?

http://trove.nla.gov.au

http://www.powerhousemuseum.com/collection/database/

http://www.opencalais.com/about

Opportunities for PROV?

http://www.prov.vic.gov.au/online-exhibitions/deeming/story01-murder.htm

http://viewer.opencalais.com/

Natural Language, Intelligents Agents, Skynet?

http://www.wolframalpha.com/about.html

Other Resourceshttp://tomheath.com/papers/bizer-heath-berners-lee-ijswis-linked-data.pdf

http://www.cdlib.org/services/dsc/technical.html

http://blogs.ukoln.ac.uk/locah/2010/07/

http://archiveshub.ac.uk/system/

http://www.slideshare.net/tinglebrian/snac-dh2011june2011

http://xtf.cdlib.org/

http://openspring.net/sites/openspring.net/files/corl-etal-2009iswc.pdf

http://thatcamp.org/