Folksonomies: Why do we need controlled vocabulary?

Abstract

The Web consists of diverse information collections in terms of the type of content, context, format and quality. However, this diversity, as good as it is, often brings
\nchallenges for users in their web information seeking activities. The technologies such as wiki, blog, RSS, and folksonomy that build Web 2.0 present an opportunity
\nto share knowledge and facilitate interactions between users and computers. One of the main challenges of Web 1.0 was that users were not engaged in information
\norganization. Currently folksonomy-based systems (e.g., Del.icio.us) engage users in bookmarking and introducing their favorites.