Use HTTP URIs so that people can look up those names.
When someone looks up a URI, provide useful information.
Include links to other URIs. so that they can discover more
things.
Tim Berners-Lee 2007
http://www.w3.org/DesignIssues/LinkedData.html
26. The RDF Data Model Richard Cyganiak dbpedia:Berlin
foaf:name foaf:based_near foaf:Person rdf:type pd:cygri
27. Data objects are identified with HTTP URIs pd:cygri Richard
Cyganiak dbpedia:Berlin foaf:name foaf:based_near foaf:Person
rdf:type pd:cygri= http://richard.cyganiak.de/foaf.rdf#cygri
dbpedia:Berlin= http://dbpedia.org/resource/Berlin
28. Follow Your Nose... Richard Cyganiak dbpedia:Berlin
foaf:name foaf:based_near foaf:Person rdf:type pd:cygri
dp:Cities_in_Germany 3.405.259 dp:population skos:subject
29. Dereferencing URIs over the Web Richard Cyganiak
dbpedia:Berlin foaf:name foaf:based_near foaf:Person rdf:type
dbpedia:Hamburg dbpedia:Muenchen skos:subject skos:subject pd:cygri
dp:Cities_in_Germany 3.405.259 dp:population skos:subject
36. What of Web Services? Web APIs Are Just Web Sites - Paul
Downey Linked Data is exposed as (very simple) RESTful
services
37. What of RDF Stores? A triplestore is just a cache of a
chunk of the Semantic Web Convenient for data merging, querying
(SPARQL) and inference See also: Semantic Web Client Library
38. What of the Real World?
source:http://danbri.org/words/2008/04/15/300 based on timbl
1994
39. W3C Linking Open Data Project
Community effort to
publish existing open license datasets as Linked Data on the
Web
interlink things between different data sources
40. LOD Datasets on the Web:May 2007
41. LOD Datasets on the Web:August 2007
42. LOD Datasets on the Web: February 2008
43. LOD Datasets on the Web: September 2008
44. LOD Datasets on the Web:March 2009
45. Spotlight: Geonames
over 8 milliongeographicallocations
featurehierarchy
46. Spotlight: DBpedia
extracts structured data from Wikipedia.
covers over 2.2 million concepts from various domains.
47. Example RDF Links
RDF links from DBpedia to other data sources
RDF link from a FOAF profile to DBpedia
owl:sameAs . foaf:topic_interest . owl:sameAs .
48.
Universities and Research Institutes
Massachusetts Institute of Technology (USA)
University of Southampton (UK)
Freie Universitt Berlin (DE)
DERI (IRE)
KMi, Open University (UK)
University of London (UK)
Universitt Hannover (DE)
University of Pennsylvania (USA)
Universitt Leipzig (DE)
Universitt Karlsruhe (DE)
Joanneum (AT)
University of Toronto (CA)
Organizations publishing Linked Data
Companies
BBC (UK)
OpenLink (UK)
Zitgist (USA)
Talis (UK)
Garlik (UK)
Mondeca (FR)
Cyc Foundation (USA)
49. Applications B C Thing typed links A D E typed links typed
links typed links Thing Thing Thing Thing Thing Thing Thing Thing
Thing SearchEngines Linked Data Mashups Linked Data Browsers
What can I do with this?
50. Linked Data Browsers
Tabulator Browser (MIT, USA)
Marbles (FU Berlin, DE)
OpenLink RDF Browser (OpenLink, UK)
Zitgist RDF Browser (Zitgist, USA)
Disco Hyperdata Browser (FU Berlin, DE)
Fenfire (DERI, Irland)
51. Tabulator
52. Linked Data Mashups
Domain-specific applications
- using Linked Data from the Web
53. DBpedia Mobile
Geospatial entry point into the Web of Data
Starts with DBpedia, Revyu and Flickr data
54. Web of Data Search Engines
Falcons (IWS, China)
Sindice (DERI, Ireland)
MicroSearch (Yahoo, Spain)
Watson (Open University, UK)
SWSE (DERI, Ireland)
Swoogle (UMBC, USA)
55. Falcons
56. Why publish Linked Data on the Web?
Your data becomes part of a single global data space (the Web
of Data = Semantic Web)
People can use various data browsers to explore your data
Your data is crawled by Semantic Web search engines and can be
used by independent applications
People start setting links to your data, which allows more
people to find and use your data
57. Why publish Linked Data on the Web?
Linked Data builds on the classic architecture of the Web
Linked Data is more generic then Web APIs or Microformats
Builds on standards in contrast to proprietary Web APIs
Enables applications that work against an unbound set of data
sources and incorporate new data sources as they become available
on the Web
58. Linked Data Principles
Use URIs as names for things
Use HTTP URIs so that people can look up those names.
When someone looks up a URI, provide useful information.
Include links to other URIs. so that they can discover more
things.
66. New Vocabularies : Scovo Statistical Core Vocabulary
67. "It is important to look as it as an interconnection bus,
and it hasn't started working in earnest until one person's data is
being used by some other unplanned use. This unexpected reuse is
the measure." -Tim Berners-Lee, re. State of the Semantic Web
Finishing Quotes
68. "Engineer for serendipity." -Roy T. Fielding, re. REST
Finishing Quotes
69. http://hyperdata.org/astronomy/ Related Links etc.