The document discusses the evolution of knowledge sharing on the internet from centralized authority to collective wisdom. It describes how the open structure of the internet allows anyone to contribute as nodes, creating large, distributed networks. Web 2.0 further enables user-generated content and collaboration through technologies like wikis, tagging, blogging, and social bookmarking. While these collective methods can aggregate diverse perspectives, they may lack context, peer review, and accuracy on controversial topics. The document also introduces the concept of the semantic web to bring more structure to online information through machine-readable meaning and relationships.

1. Collective knowledge on the internet Wisdom of crowds or the loss of authority SP04 LC week 4

9. Directories

17. They Rule - Josh On & Futurefarmers (2002-2004)

19. Del.icio.us

23. Content can be integrated in any platform (web, mobile, etc.)

25. Digg

27. popurls