Kim, Hak Lae ; Scerri, Simon ; Breslin, John G. ; Decker, Stefan ; Kim, Hong Gee: {The State of the Art in Tag Ontologies: A Semantic Model for Tagging and Folksonomies}. In: {Proceedings of the 2008 International Conference on Dublin Core and Metadata Applications}. Berlin, Deutschland : {Dublin Core Metadata Initiative}, 2008, S. 128--137