From Wikipedia:
Folksonomy is a neologism for a practice of collaborative categorization using freely chosen keywords. This feature began appearing in a variety of social software in 2004. Some examples of online folksonomies being social bookmarking sites like del.icio.us and Jots which are bookmark sharing sites, Flickr, for photo sharing, 43 Things, for goal sharing, GenieLab, for music recommendations and associations, and Tagsurf, for tag-based discussions. Gmail's labeling system is somewhat similar to the use of tags, but it is not a folksonomy as users cannot share their categorizations. Folksonomy is not directly related to the concept of faceted classification from library science.










