subtitle: "This Is The Most Informal Talk You Will Ever Hear About a Formal Topic" Originally presented at the IEEE/ACM 2009 Joint Conference on Digital Libraries, Workshop On Integrating Digital Library Content with Computational Tools and Services, on 19 June 2009. co-author: http://www.slideshare.net/krpage

2. This Is The Most
Informal Talk You Will
Ever Hear About a
Formal Topic
Ben Fields - Goldsmiths University of London
Kevin Page - University of Southampton

3. or
The Semantic Web
and why you should
care

4. Semantic Web

5. Semantic Web

6. Semantic

7. meaning

8. machine readable

9. machine readable
meaning

10. self-describing
machine readable
meaning

11. Why RDF?
self-describing
machine readable
meaning

12. What is RDF?

13. RDF is a model
predicate
subject object

14. Is that it?

15. Yes, that’s it.
predicate
subject object

16. The model can be
serialized as XML

17. The model can be
serialized as XML
It’s pig ugly

18. The model can be
serialized as XML
It’s pig ugly
That’s fine.
Machines eat ugly for
breakfast

19. Honestly, don’t worry
RDF != RDF/XML

20. Our model can
describe models

21. Specific Models

22. Specific Models
About stuff

23. Specific Models
About Things

24. Specific Models
About Things
Let’s call these
ontologies

25. This Is The Most
Informal Talk You Will
Ever Hear About a
Formal Topic
Ben Fields - Goldsmiths University of London
Kevin Page - University of Southampton

27. Ontologies are
described in OWL

28. Ontologies are
described in OWL
OWL is modeled in
RDF

29. RDF is machine
readable

30. RDF is machine
readable
So ontologies can
understood by
machines

31. This Is The Most
Informal Talk You Will
Ever Hear About a
Formal Topic
Ben Fields - Goldsmiths University of London
Kevin Page - University of Southampton

32. Even if that’s just to
assert that everything is
a Thing

33. This Is The Most
Informal Talk You Will
Ever Hear About a
Formal Topic
Ben Fields - Goldsmiths University of London
Kevin Page - University of Southampton

34. Semantic Web

35. Semantic Web

36. Web

37. The Web is simply the
biggest, most successful,
most useable,
distributed systems
architecture ever.

38. “The Web is simply the
biggest, most successful,
most useable,
distributed systems
architecture ever.”
David De Roure

39. Linking

40. Linking
Scale

41. The mechanism for
Linking
enables the Web to
Scale

42. Do people scale?

43. Do people scale?
Do people scale to the
size of the Web?

44. machine readable
meaning

45. Why does the
Web scale?

46. REST

47. A Resource Oriented
Architecture

48. A Resource Oriented
Architecture
with a simple protocol to
return representations of
those resources

49. HTTP returns those
representations

50. HTTP returns those
representations
When it talks to us,
it returns HTML

51. The resources are
simply addressable
objects

52. so ur ce
Re
What is RDF? e wor k
nFram
ri p t io
De sc

53. About those
addressable
Things...

54. We address them
using URIs

55. http://www.bbc.co.uk/music/artists/668fd73c-bf54-4310-a139-305517f05311

56. http://www.bbc.co.uk/music/artists/668fd73c-bf54-4310-a139-305517f05311
This is the Willie Nelson.

57. http://www.bbc.co.uk/music/artists/668fd73c-bf54-4310-a139-305517f05311
This is the Willie Nelson.
Honest.

58. Everything in RDF
is a
resource

59. Everything in RDF
is a
URI

60. ot q u i te
n
Yes, that’s ^it.
predicate
subject object
I U R I I
U R U R

61. Why is this
important to
second generation
digital libraries?

62. Principally libraries
are about sharing

63. Principally libraries
are about sharing
Things.

64. Do people scale?

65. Do people scale?
Do people scale to the
size of the Web?

66. machine readable
meaning

68. Demo?

69. Questions?