What really means web 3.0, or: the semantic web? With this second presentation I explain the meaning of web 3.0 by an example of a stamp collection. This presentation is a translation of a Dutch version made earlier. For more detailed information in Dutch you can have a look at BijlBrand.nl

1. Web 3.0 explained with a stamp (English version) Part I: the basics Part II: techniques II

2. A presentation from: Freek Bijl (Dutch) blog: Bijlbrand.nl

3. Web 3.0 - the semantic web - is about the meaning of data.

4. This is a stamp This stamp is from the United Kingdom This stamp is designed by John Bryan Dunmore In 1980 you could buy this stamp for 1 cent Now it’s worth 3 euros This stamp is used between 1978 - 1981 The picture on the stamp is a PO Box

5. Why do we want to add meaning to data ?

6. When a computer understands what data means, it can do intelligent search, reasoning and combining .

7. This makes our live more easy.

8. The next technologies are used to make a more semantic web…

9. RDF XML URI SPARQL XDI XRI SWRL XFN OWL API OAUTH

11. An explanation with a stamp collection.

12. Meaning is about understanding . To understand we need a language . A language starts with words.

13. Things mean something in words. Online, we describe things with XML.

15. =

17. We can’t understand words alone. We also need grammar . Online grammar is RDF (Resource Description Framework).

18. This stamp is from England.

19. This stamp is from England. subject predicate object

20. With RDF Scheme we can define concepts and make simple relations between them.

21. This stamp is from England, hence from Europe.

22. But, RDF scheme is limited. A language needs more expression and logic to make good reasoning possible. That’s why OWL (The Web Ontology Language ) was invented.

23. Finally, to reason you need rules.

24. I got this stamp from my uncle.

26. Rules are formulated in SWRL (Semantic Web Rule Language).

28. So,

29. Words in XML Grammar in RDF (scheme) and OWL Rules in SWRL

30. There are a lot of things, that can be described using standard formats.

31. For example: contact information.

33. Suppose, I want to search for a specific stamp.

34. “ I want all the red stamps, designed in Europe, but used in the U.S.A., between 1980 and 1990”

35. We can use SPARQL (Protocol and RDF Query Language).

36. Because the web is decentralized and data is in many places, not only language is important. Exchange of data between different machines is key.

37. A database with stamps A database with countries A database with colors A database with stamp traders

38. To make a connection a machine needs a source. For this, we use resource identifiers . Best known resource identifier is the URI (which consists of a name (urn) and a location (url)).

40. Because URI’s have international limitations and the need for data-exchange between machines is rapidly growing there is a successor: XRI (Extensible Resource Identifier)

41. There is a standard for sharing, linking and synchronizing data. This standard is called XDI (XRI Data Interchange).

42. With all this I am capable of using the power of all different data resources on the web.

43. But…

44. Data is protected. We need consent and a key to gain acces.

45. The key to certain data is described in an API (an application programming interface).

46. An open standard for accessing (authentication) the API is OAuth.

47. So,

48. RDF XML URI SPARQL XDI XRI SWRL XFN OWL API OAUTH

49. … are now words with a meaning for you !

50. .end My (Dutch) blog: http://www.bijlbrand.nl