Collaborative Tagging as a Knowledge Organisation and Resource Discovery Tool
Macgregor, George and McCulloch, Emma (2006) Collaborative Tagging as a Knowledge Organisation and Resource Discovery Tool.
Modern facet analytical theory contrasts with earlier views of knowledge as an integral whole (which is broken down into smaller and smaller units) in that it deals with individual terms or concepts which are clustered into categories to create a 'bottom-up' map of knowledge.
M. Carman, M. Baillie, R. Gwadera, und F. Crestani. Proceedings of the 32nd international ACM SIGIR conference on Research and development in information retrieval, Seite 123--130. New York, NY, USA, ACM, (2009)