Slides used to introduce Linked Data concepts in the ELAG 2014 Workshop "The Power of Sharing Linked Data" - Bath University, UK 10/11 June 2014

2. Richard Wallis
Technology Evangelist

3. Richard Wallis
Technology Evangelist
Linked Data

4. Richard Wallis
Technology Evangelist
The Simple Power Of The Link

5. Web?Semantic

6. Web?The

7. Web?
HTML
The

8. Web?
URL
HTML
The

9. Web?
http
URL
HTML
The

10. Web?
http
URL
Flash
Javascript
DOM
CSS
Ajax
SEO
Microformats RDFa
JQuery
HTML5
CSS3
XML JSON
HTML
The

11. Web?
http URLHTML
The

12. Web?
HTML http URL

13. Web?
HTML http URL
Text text text
text text link
text. Text, text
text text, text.
Text text - text
text - text text
text.
Document

14. Web?
HTML http URL
Text text text
text text link
text. Text, text
text text, text.
Text text - text
text - text text
text.
Text text text
text text.Text:
• link
• link
Text text, text.
Text text - link
text - text text.
Document Document

15. Web?
HTML http URL
Text text text
text text link
text. Text, text
text text, text.
Text text - text
text - text text
text.
Text text text
text text.Text:
• link
• link
Text text, text.
Text text - link
text - text text.
Document Document

16. Web?
HTML http URL
Text text text
text text link
text. Text, text
text text, text.
Text text - text
text - text text
text.
Text text text
text text.Text:
• link
• link
Text text, text.
Text text - link
text - text text.
Document Document
http://example.com/page1

17. Web?
HTML http URL
Text text text
text text link
text. Text, text
text text, text.
Text text - text
text - text text
text.
Text text text
text text.Text:
• link
• link
Text text, text.
Text text - link
text - text text.
Document Document
http://example.com/page1
http://eg.co.uk/list

18. Web?
http://example.com/page1 http://eg.co.uk/list
Link

19. Web?
Linking at it’s core
http://www.flickr.com/photos/leapkye/4407661949
The

20. Web?
Linking at it’s core
http://www.flickr.com/photos/leapkye/4407661949
The
Powerful

21. Web?
©AllPosters.com
Linking at it’s core
link
The
Powerful

22. Web
The

23. Web
The
Semantic

24. Web
The
Semantic
Got a bad press

25. Flying CarsTechnology
Ai
Web
The
Semantic
Got a bad press

26. Linked Data
Linked Data

27. Linked Data
Built on Semantic Web Standards
Linked Data

28. Linked Data
Built on Semantic Web Standards
All about identifying and linking things
Linked Data
Thing

29. Identifying things

30. Identifying things

31. Identifying things
1969-059A

32. Identifying things
spacecraft/1969-059A
1969-059A

33. Identifying things
spacecraft/1969-059A
nasa.dataincubator.org/spacecraft/1969-059A
1969-059A

34. Identifying things
spacecraft/1969-059A
nasa.dataincubator.org/spacecraft/1969-059A
http://nasa.dataincubator.org/spacecraft/1969-059A
1969-059A

35. Identifying things
spacecraft/1969-059A
nasa.dataincubator.org/spacecraft/1969-059A
http://nasa.dataincubator.org/spacecraft/1969-059A
1969-059A
with URIs

36. Things have attributes
http://nasa.dataincubator.org/spacecraft/1969-059A

37. Things have attributes
http://nasa.dataincubator.org/spacecraft/1969-059A
28801.0kg

38. Things have attributes
http://nasa.dataincubator.org/spacecraft/1969-059A
28801.0kg
Columbia

39. Things have attributes
http://nasa.dataincubator.org/spacecraft/1969-059A
28801.0kg
Columbia
Apollo 11 CSM
CSM-107
United States
Cape Canaveral
Saturn 5

40. http://nasa.dataincubator.org/spacecraft/1969-059A

41. http://nasa.dataincubator.org/spacecraft/1969-059A
.../1969-059A

42. http://nasa.dataincubator.org/spacecraft/1969-059A
mass
28801.0
.../1969-059A

43. http://nasa.dataincubator.org/spacecraft/1969-059A
mass
28801.0
Apollo 11 CSM
name
.../1969-059A

44. http://nasa.dataincubator.org/spacecraft/1969-059A
mass
28801.0
Apollo 11 CSM Columbia
name name
.../1969-059A

45. http://nasa.dataincubator.org/spacecraft/1969-059A
mass
28801.0
Apollo 11 CSM Columbia
name name
.../1969-059A
prefName

46. http://nasa.dataincubator.org/spacecraft/1969-059A
mass
28801.0
Apollo 11 CSM Columbia
name name
launch
.../1969-059A
../launch/
1969-059
prefName

47. http://nasa.dataincubator.org/spacecraft/1969-059A
mass
28801.0
Apollo 11 CSM Columbia
name name
launch
16 July 1969
date
.../1969-059A
../launch/
1969-059
prefName

48. http://nasa.dataincubator.org/spacecraft/1969-059A
mass
28801.0
Apollo 11 CSM Columbia
name name
launch
16 July 1969
date
site
.../1969-059A
../launch/
1969-059
Cape
Canaveral
prefName

49. http://nasa.dataincubator.org/spacecraft/1969-059A
mass
28801.0
Apollo 11 CSM Columbia
name name
launch
16 July 1969
date
site
N 28° 27' 31''
lat
.../1969-059A
../launch/
1969-059
Cape
Canaveral
prefName

50. http://nasa.dataincubator.org/spacecraft/1969-059A
mass
28801.0
Apollo 11 CSM Columbia
name name
launch
16 July 1969
date
site
N 28° 27' 31''
W 80° 31' 59''
lat
long
.../1969-059A
../launch/
1969-059
Cape
Canaveral
prefName

51. http://nasa.dataincubator.org/spacecraft/1969-059A
mass
28801.0
Apollo 11 CSM Columbia
name name
launch
16 July 1969
date
site
RDF
N 28° 27' 31''
W 80° 31' 59''
lat
long
.../1969-059A
../launch/
1969-059
Cape
Canaveral
prefName

52. http://nasa.dataincubator.org/spacecraft/1969-059A
mass
28801.0
Apollo 11 CSM Columbia
name name
launch
16 July 1969
date
site
RDF
N 28° 27' 31''
W 80° 31' 59''
lat
long
.../1969-059A
../launch/
1969-059
Cape
Canaveral
<../1969-059A> mass 28801.0 .
<../1969-059A> name “Apollo 11 CSM” .
<../1969-059A> name “Columbia” .
<../1969-059A> prefName “Columbia” .
<../1969-059A> launch <../launch/1969-059> .
<../launch/1969-059> date 1969-07-16 .
<../launch/1969-059> site <..site/capecanaveral> .
<..site/capecanaveral> lat “N 28° 27' 31''” .
<..site/capecanaveral> long “W 80° 31' 59''” .
prefName

54. RDF Triple

55. RDF Triple
Thing attribute value

56. property
RDF Triple
Thing value

57. property
RDF Triple
Thing value
Thing property Thing

58. property
RDF Triple
Thing value
Thing property Thing
../person/A

59. property
RDF Triple
Thing value
Thing property Thing
../person/A hasParent

60. property
RDF Triple
Thing value
Thing property Thing
../person/B../person/A hasParent

61. property
RDF Triple
Thing value
Thing property Thing
../person/B
../person/B
../person/A hasParent

62. property
RDF Triple
Thing value
Thing property Thing
../person/B
name../person/B
../person/A hasParent

63. property
“Eric”
RDF Triple
Thing value
Thing property Thing
../person/B
name../person/B
../person/A hasParent

64. property
“Eric”
RDF Triple
Thing value
Thing property Thing
../person/B
name../person/B
../person/A hasParent

65. property
“Eric”
RDF Triple
Thing value
Thing property Thing
name../person/B../person/A hasParent
Merging

66. RDF Triple
Merging

67. RDF Triple
Merging
The same identifier in a different
place still identifies the same thing

93. Linked Data Principles
Linked Data Principles

94. Linked Data Principles
Linked Data Principles
1. Use URIs as names for things

95. Linked Data Principles
Linked Data Principles
1. Use URIs as names for things
2. Use HTTP URIs so people can look up those
names

96. Linked Data Principles
Linked Data Principles
1. Use URIs as names for things
2. Use HTTP URIs so people can look up those
names
3. When someone looks up a URI, provide useful
information, using the standards - RDF

97. Linked Data Principles
Linked Data Principles
1. Use URIs as names for things
2. Use HTTP URIs so people can look up those
names
3. When someone looks up a URI, provide useful
information, using the standards - RDF
4. Include links to other URIs, so that they can
discover more
Tim Berners-Lee - 2006

98. Data Open and/or Linked
Data Open and/or Linked

99. Data Open and/or Linked
Paul Walk - UKLON
1. Data can be open, while not being linked
2. Data can be linked, while not being open
3. Data which is both open and linked is increasingly
viable
4. The Semantic Web can only function with data
which is both open and linked
Data Open and/or Linked

100. Linked Data Tools
Storage!
File System / Web Server!
Relational Database - output mapped to RDF!
D2RQ!
Graph Data Store!
!
Triple Store (SPARQL Endpoint)!
Native graph store!
SPARQL Query Language!
Pattern matching!
Not good at strings!
SQL-like syntax!