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Lecture at the IT University, Gothenburg 22 Nov 2012
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Kerstin Forsberg
AstraZeneca, R&D Information
kerfors on Twitter, Google+, LinkedIn, Slideshare, Blogspot, citulike
Linked (Open) Data
IT University, Göteborg
What is this?
DBpedia
WikiData
Schema.org
Some headlines
How DBpedia treats Wikipedia as a Database
Wikipedia’s Next Big Thing: Wikidata, A Machine-
Readable, User-Editable Database Funded By
Google, Paul Allen And Others
Google, Bing, Yahoo Start Schema.org for Content
Markup
Linked Open Data cloud
Richard Cyganiak and Anja Jentzsch
http://lod-cloud.net/
Growing Linked Open Data Cloud
http://youtu.be/TXFYSWuEOOw
Linking Open Data (LOD) cloud
5
http://data.gov.uk/ http://data.gov/
Web of (Linked) Data
Web 3.0
Web of Documents
An Intro To The Semantic Web: Why You Need To Know
About It Sooner Than Later , by Samantha Wong
Image Source: Frederic Martin
Global ID:s (URI:s)
http://dbpedia.org/resource/IT_University
http://dbpedia.org/resource/Gothenburg
http://schema.org/CollegeOrUniversity
http://education.data.gov.uk/id/school/123065
http://research.data.astrazeneca.com/id/clinicalstudy/D5890C00003
http://linkedct.org/resource/trial/nct00244608/
http://spending.lichfielddc.gov.uk/spend/8605670
http://reference.data.gov.uk/def/payment#netAmount
Opportunities Data organized for associations.
Data prepared for not yet defined use.
Data ready for automation where computers can
function alongside us to:
Mitigate the complexity in discovering, accessing,
connecting and interpreting information.
Improve the productivity in managing
information.
Semantic Web Standard Stack
RDF Triples
Resource Description Framework (RDF)
A general model of how any piece of data, and
representations of knowledge, can be expressed as
so called triples.
subject predicate
Stockholm place
Stockholm Sweden
Stockholm Port cities in Sweden
Stockholm “+46-8”
object (or value)
type
capital
subject
areaCode
“http://en.wikipedia.org/wiki/Stockholm” primaryTopic Stockholm
RDF Triples
Triples can be aggregated into graphs with subject
and objects as nodes, and predicates as arcs.
City
Sweden
Stockholm Port cities in Sweden
“+46-8”
type
capital
subject
areaCode
“http://en.wikipedia.org/wiki/Stockholm” primaryTopic
RDF Triples
Graphs of triples can be extended across different
sources and for different purpose.
12
City
Sweden
Stockholm Port cities in Sweden
“+46-8”
type
capital
subject
areaCode
Country type
Gothenburg
subject
CDISC
CDISC
Interchange
EU 2012
“http://en.wikipedia.org/wiki/Stockholm” primaryTopic
RDF Triples
RDF Schema and the RDF based Web Ontology
Language (OWL) add a typing mechanism to
classify subjects and objects into hierarchies.
City
Sweden
Stockholm Port cities in Sweden
“+46-8”
type
capital
subject
areaCode
Country type CDISC
CDISC
Interchange
EU 2012
“http://en.wikipedia.org/wiki/Stockholm” primaryTopic
Adm.Area
Place
subClass
subClass
Organization
type
Business
Event
type
Event
subClass
Thing subClass subClass
Gothenburg
subject
subClass
RDF Triples
Google, Bing (Microsoft) and Yahoo use OWL
publish a joint vocabulary.
City Country
Adm.Area
Place
subClass
subClass
subClass
Organization
Business
Event
Event
subClass
Thing subClass subClass
Exempel
http://schema.org/City
4 Principles for Linked Data … … and 5 stars for Linked Open Data
• Use URIs (Uniform Resource Identifiers) as names for things.
• Use HTTP URIs so that people can look up (dereference) those names.
• When someone looks up a URI, provide useful information.
• Include links to other URIs so that they can discover more things.
Source: Linked Open Data star scheme by example
More resources introducing and describing the Linked Data idea
Linked Enterprise Data
Source: What does Open Data mean for Enterprises?
More resources introducing and describing the Linked Data idea
I’m encouraged by …
• … what actually can be done by applying Linked
Data principles, together with a stepwise
implementation and pragmatic application of
crucial building blocks, to …
• … improve the research and commercial
utility of information
• Organized for associations
• Prepared for not yet defined use
• Ready for automation where computers can
function alongside us to
Mitigate the complexity in discovering,
accessing, connecting and interpreting
information
Improve the productivity in managing
information
Health Care and Life Sciences (HCLS)
Interest Group
Linking Open Drug Data
EU project The Large Knowledge Collider
Linked Life Data
A 2-page summary of our learnings from
participating in these external projects:
Linked Data in Pharma, 2011, Bo Andersson
and Kerstin Forsberg
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