@techreport{citeulike:739394, abstract = {Collaborative tagging systems---systems where many casual users annotate objects with free-form strings (tags) of their choosing---have recently emerged as a powerful way to label and organize large collections of data. During our recent investigation into these types of systems, we discovered a simple but remarkably effective algorithm for converting a large corpus of tags annotating objects in a tagging system into a navigable hierarchical taxonomy of tags. We first discuss the algorithm and then present a preliminary model to explain why it is so effective in these types of systems.}, author = {Heymann, Paul and Garcia-Molina, Hector}, citeulike-article-id = {739394}, institution = {Computer Science Department}, interhash = {d77846b40aadb0e25233cabf905bb93e}, intrahash = {3b4ce6fd7fa6dbf1c39fd261fa39fcd6}, month = {April}, number = {2006-10}, priority = {3}, school = {Standford University}, title = {Collaborative Creation of Communal Hierarchical Taxonomies in Social Tagging Systems}, url = {http://dbpubs.stanford.edu:8090/pub/2006-10}, year = 2006 }