In this website you can find information about folksonomies, their strenghts and weaknesses, and Sem4Tags an approach to improve multilingual folksonomies using semantic web techniques. In addition, there is information about the developed demo software to associate tags with semantic entities.
On the “social web” or “web2.0″, where user participation is entirely voluntarily, User Motivation has been identified as a key factor in the mechanisms contributing to the success of tagging systems. Web researchers are trying to identify the reasons why tagging systems work for a couple of years now, evident in, for example, the organization of a panel at CHI 2006 and a number of conferences and workshops on this topic.
Daniela Barbosa, who is the business development manager for Synaptica at Dow Jones Client Solutions has written a fabulous eBook explaining how to mix taxonomies built by professionals and folksonomies, which let users tag content as they see fit
R. Jäschke, L. Marinho, A. Hotho, L. Schmidt-Thieme, and G. Stumme. Knowledge Discovery in Databases: PKDD 2007, 11th European Conference on Principles and Practice of Knowledge Discovery in Databases, volume 4702 of Lecture Notes in Computer Science, page 506-514. Berlin, Heidelberg, Springer, (2007)
R. Kern, C. Korner, and M. Strohmaier. Research and Advanced Technology for Digital Libraries, volume 6273 of Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2010)
R. Wetzker, W. Umbrath, and A. Said. Proceedings of the WSDM '09 Workshop on Exploiting Semantic Annotations in Information Retrieval, page 25--29. New York, NY, USA, ACM, (2009)
R. Jäschke, F. Eisterlehner, A. Hotho, and G. Stumme. RecSys '09: Proceedings of the third ACM Conference on Recommender Systems, page 369--372. New York, NY, USA, ACM, (2009)
A. Hotho, R. Jäschke, C. Schmitz, and G. Stumme. Proceedings of the First International Conference on Semantic and Digital Media Technologies, page 56--70. Berlin, Heidelberg, Springer-Verlag, (2006)