2. Course setup
LD principles + practice
- Introduction to Linked Data
- Building blocks of Linked Data
- Simple Hands-on
LD principles + practice
- Serving Linked Open Data
- SPARQL
- Hands-on: ClioPatria
LD principles + practice
- Linking your data
- Consuming Linked Data
- Hands-on: Finalizing your LD
5. Internet, WWW, Linked Data?
• Internet
– 1970s
– Network of linked computers
– Protocols for communication
(TCP/IP)
– Multiple applications
• World Wide Web
• Linked Data/Semantic Web
6.
7. Tim Berners-Lee
(aka Sir Tim aka TBL)
Invented the Web in
1989
Wrote the HTTP
Protocol
Wrote HTML language
Wrote the first browser
9. Internet, WWW, Linked Data?
• Internet
– 1970s
– Network of linked computers
– Protocols for communication
(TCP/IP)
– Multiple applications
• World Wide Web
–
–
–
–
1989 Tim Berners-Lee
Application on top of Internet
Hyperlinked documents
Protocols for communication
(HTTP)
– Markup languages (HTML)
– Browsers
• Linked Data/Semantic Web
12. Tim Berners-Lee
(aka Sir Tim aka TBL)
Invented the Web in
1989
Wrote the HTTP
Protocol
Wrote HTML language
Wrote the first browser
Wrote 2001 Scientific
American paper “The
Semantic Web” (with
Ora Lasilla and Jim
Hendler)
13.
14. Internet, WWW, Linked Data?
• Internet
– 1970s
– Network of linked computers
– Protocols for communication
(TCP/IP)
– Multiple applications
• World Wide Web
–
–
–
–
1989 Tim Berners-Lee
Application on top of Internet
Hyperlinked documents
Protocols for communication
(HTTP)
– Markup languages (HTML)
– Browsers
• Linked Data/Semantic Web
– 2001 Tim Berners-Lee
– Application on top of Internet,
– Smart Web of hyperlinked data,
information and knowledge
– Standards / languages for
representing data, information,
knowledge (RDF, OWL)
– Since 2007 “Linked Data”
15. Wat is Linked Open Data
Open data is about licensing
Linked Data is about interoperability
Linked Open Data combines the two
``a term used to describe a recommended
best practice for exposing, sharing, and
connecting
pieces
of data, information, and knowledge on
the Semantic Web using URIs and RDF.’’
--Wikipedia
``Sharable, spreadable and nerd-friendly’’
-- Charlotte S H Jensen, kulturweb
16. Linked Open Data five star system
★
Available on the web (whatever
format), but with an open license
★★
Available as machine-readable
structured data (e.g. excel instead
of image scan of a table)
★★★
as (2) plus non-proprietary format
(e.g. CSV instead of excel)
★★★★
All the above plus, Use open
standards from W3C (RDF and
SPARQL) to identify things, so that
people can point at your stuff
★★★★★
All the above, plus: Link your data
to other people’s data to provide
context
www.w3.org/designissues/linkeddata.html
21. “Linking Open Data cloud diagram, by Richard Cyganiak and Anja Jentzsch. http://lod-cloud.net/”
22. “Linking Open Data cloud diagram, by Richard Cyganiak and Anja Jentzsch. http://lod-cloud.net/”
23. Examples of Linked Data
•
•
•
•
Academia, Research
Community
Libraries, Museums, Cultural Heritage
Government and public institutions
(Open Data)
• Media
• Business
24. How does all this work?
•
•
•
•
Data, not documents
Structured data
Graph data!
W3C Web standards stack
– URIs, HTTP, RDF, RDFa, RDFS, OWL, SPARQL, etc
29. Hands-on Session 1
• 15 mins
• Introduce yourselves to each other!
• Draw a social RDF graph of your group
– Represent each member of the group
– Give everyone a name
– You know each other now, so you can connect to each
other in the graph
– Add other data about yourselves:
• Hometown
• University
• Things you like (e.g., music, films, …)
Editor's Notes
Acoustic Coupler
On the WWW there is more and more interesting DATA. But for Whom is this data
Evtoverslaan
- Before we go into the details with specific technologies, we’re going to give you some example of where this type of thinking has been appliedWeb semantics and Linked Data started out in academia in computer science and AI research, so that’s where originally most applications could be foundHowever, this quickly moved from there to other domains in researchThen into community efforts, public institutions, cultural institutions, as well as governments and administration – areas where was probably not to make a profitMedia with their vast amount of content have increasingly made use of Linked DataBusinesses are also recently seeing more and more benefits from using structured, linked data, for different reasons (internal efficiency, graph data as an improvement to the product (search engines), graph data as a valuable resource)
- Here is an actual example of a graph of dataThere are real-world things (ovals)There are data values (boxes)There are relationships (green arrows)