creators_name: Plangprasopchok, Anon creators_name: Lerman, Kristina type: conference_item datestamp: 2009-04-06 19:10:54 lastmod: 2009-04-21 07:25:52 metadata_visibility: show title: Constructing Folksonomies from User-Specified Relations on Flickr ispublished: pub full_text_status: public pres_type: paper abstract: Automatic folksonomy construction from tags has attracted much attention recently. However, inferring hierarchical relations between concepts from tags has a drawback in that it is difficult to distinguish between more popular and more general concepts. Instead of tags we propose to use userspecified relations for learning folksonomy. We explore two statistical frameworks for aggregating many shallow individual hierarchies, expressed through the collection/set relations on the social photosharing site Flickr, into a common deeper folksonomy that reflects how a community organizes knowledge. Our approach addresses a number of challenges that arise while aggregating information from diverse users, namely noisy vocabulary, and variations in the granularity level of the concepts expressed. Our second contribution is a method for automatically evaluating learned folksonomy by comparing it to a reference taxonomy, e.g., the Web directory created by the Open Directory Project. Our empirical results suggest that user-specified relations are a good source of evidence for learning folksonomies. date: 2009-04 pagerange: 781-781 event_title: 18th International World Wide Web Conference event_location: Madrid, Spain event_dates: April 20th-24th, 2009 event_type: conference refereed: TRUE citation: Plangprasopchok, Anon and Lerman, Kristina (2009) Constructing Folksonomies from User-Specified Relations on Flickr. In: 18th International World Wide Web Conference, April 20th-24th, 2009, Madrid, Spain. document_url: http://www2009.eprints.org/79/2/www09-folksonomy-v2.ppt document_url: http://www2009.eprints.org/79/1/p781.pdf