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.
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
A. Plangprasopchok, K. Lerman, und L. Getoor. Proceedings of the 4th ACM Web Search and Data Mining Conference, (2010)cite arxiv:1011.3557Comment: In Proceedings of the 4th ACM Web Search and Data Mining Conference (WSDM).
A. Hotho, R. Jäschke, C. Schmitz, und G. Stumme. Proc. First International Conference on Semantics And Digital Media Technology (SAMT), Volume 4306 von LNCS, Seite 56-70. Heidelberg, Springer, (Dezember 2006)