1. What is the Semantic Web? www.pleso.net for Codecamp 2009 Kyiv, Ukraine 2009-01-15, Amsterdam, The Netherlands Ivan Herman, W3C ReadWriteWeb Microformats

2. Let’s organize a trip to Budapest using the Web!

3. You try to find a proper flight with …

4. … a big, reputable airline, or …

5. … the airline of the target country, or …

6. … or a low cost one

7. You have to find a hotel, so you look for…

8. … a really cheap accommodation, or …

9. … or a really luxurious one, or …

10. … and intermediate one …

11. oops, that is no good, the page is in Hungarian that almost nobody understands, but…

12. … this one could work

13. Of course, you could decide to trust a specialized site…

14. … like this one, or…

15. … or this one

16. You may want to know something about Budapest; look for some photographs…

17. … on flickr …

18. … on Google …

19. … or you can look at mine

20. but you can also look at a (social) travel site

24. Another example: social sites. I have a list of “friends” by…

25. … Dopplr,

26. … Twine,

27. … LinkedIn,

28. … and, of course, the ubiquitous Facebook

31. But wait! Isn’t what mashup sites are already doing?

32. A “mashup” example:

35. So What is the Semantic Web?

36. It is a collection of standard technologies to realize a Web of Data WWW -> GGG (Giant Global Graph)

44. A simplified bookstore data (dataset “A”)

45. 1 st : export your data as a set of relations

47. Another bookstore data (dataset “F”)

48. 2 nd : export your second set of data

49. 3 rd : start merging your data

50. 3 rd : start merging your data (cont.)

51. 3 rd : merge identical resources

54. 3 rd revisited: use the extra knowledge

57. Merge with Wikipedia data

58. Merge with Wikipedia data

59. Merge with Wikipedia data

61. Simple SPARQL example SELECT ?isbn ?price ?currency # note: not ?x! WHERE {?isbn a:price ?x. ?x rdf:value ?price. ?x p:currency ?currency.}

64. What did we do? (cont)

66. Semantic Web technologies stack

69. DBpedia: Extracting structured data from Wikipedia http://en.wikipedia.org/wiki/ Kolkata <http://dbpedia.org/resource/ Kolkata > dbpedia:native_name “Kolkata (Calcutta)”@en; dbpedia:altitude “9”; dbpedia:populationTotal “4580544”; dbpedia:population_metro “14681589”; geo:lat “22.56970024108887”^^xsd:float; ...

70. Automatic links among open datasets DBpedia Geonames Processors can switch automatically from one to the other… <http://dbpedia.org/resource/ Kolkata > owl:sameAs <http://sws.geonames.org/1275004/>; ... <http://sws.geonames.org/1275004/> owl:sameAs <http://DBpedia.org/resource/Kolkata> wgs84_pos:lat “22.5697222”; wgs84_pos:long “88.3697222”; sws:population “4631392” ...

84. Thanks! http://www.pleso.net/ [email_address] Credits: * 2009-01-15, What is the Semantic Web? (in 15 minutes), Ivan Herman, ISOC New Years Reception in Amsterdam, the Netherlands * 2008-09-24, Introduction to the Semantic Web (tutorial) Ivan Herman, 2nd European Semantic Technology Conference in Vienna, Austria * ReadWriteWeb - Web Technology Trends for 2008 and Beyond (http://www.readwriteweb.com/), 10 best semantic applications * Microformats (http://microformats.org/)