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
J. Illig, A. Hotho, R. Jäschke, und G. Stumme. Knowledge Processing and Data Analysis, Volume 6581 von Lecture Notes in Computer Science, Seite 136--149. Berlin/Heidelberg, Springer, (2011)
G. Solskinnsbakk, und J. Gulla. On the Move to Meaningful Internet Systems, OTM 2010, Volume 6427 von Lecture Notes in Computer Science, Springer, Berlin / Heidelberg, (2010)
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).
M. Jonsson. Proceedings of the 2007 International Conference on Mobile Data Management, Seite 304--308. Washington, DC, USA, IEEE Computer Society, (2007)