The anatomy of a large-scale hypertextual Web search engine
WWW7 Proceedings of the seventh international conference on World Wide Web 7
Usage patterns of collaborative tagging systems
Journal of Information Science
Structure and evolution of online social networks
Proceedings of the 12th ACM SIGKDD international conference on Knowledge discovery and data mining
Can social bookmarking enhance search in the web?
Proceedings of the 7th ACM/IEEE-CS joint conference on Digital libraries
Network properties of folksonomies
AI Communications - Network Analysis in Natural Sciences and Engineering
Flickr tag recommendation based on collective knowledge
Proceedings of the 17th international conference on World Wide Web
Tag-based social interest discovery
Proceedings of the 17th international conference on World Wide Web
Exploring social annotations for information retrieval
Proceedings of the 17th international conference on World Wide Web
Understanding the efficiency of social tagging systems using information theory
Proceedings of the nineteenth ACM conference on Hypertext and hypermedia
Logsonomy - social information retrieval with logdata
Proceedings of the nineteenth ACM conference on Hypertext and hypermedia
Efficient network aware search in collaborative tagging sites
Proceedings of the VLDB Endowment
Social tags: meaning and suggestions
Proceedings of the 17th ACM conference on Information and knowledge management
Towards a model of understanding social search
Proceedings of the 2008 ACM conference on Computer supported cooperative work
Managing Complexity: Insights, Concepts, Applications
Managing Complexity: Insights, Concepts, Applications
WordNet: similarity - measuring the relatedness of concepts
AAAI'04 Proceedings of the 19th national conference on Artifical intelligence
Aspects of augmented social cognition: social information foraging and social search
OCSC'07 Proceedings of the 2nd international conference on Online communities and social computing
Comparison of tagging in an educational context: Any chances of interplay?
International Journal of Technology Enhanced Learning
Folks in Folksonomies: social link prediction from shared metadata
Proceedings of the third ACM international conference on Web search and data mining
Physician-driven management of patient progress notes in an intensive care unit
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Conversational tagging in twitter
Proceedings of the 21st ACM conference on Hypertext and hypermedia
On managing social data for enabling socially-aware applications and services
Proceedings of the 3rd Workshop on Social Network Systems
Proceedings of the 1st ACM international workshop on Connected multimedia
Social people-tagging vs. social bookmark-tagging
EKAW'10 Proceedings of the 17th international conference on Knowledge engineering and management by the masses
Individual behavior and social influence in online social systems
Proceedings of the 22nd ACM conference on Hypertext and hypermedia
Journal of Information Science
Friendship prediction and homophily in social media
ACM Transactions on the Web (TWEB)
Understanding and leveraging tag-based relations in on-line social networks
Proceedings of the 23rd ACM conference on Hypertext and social media
Emergent semantics from game-induced folksonomies
Proceedings of the First International Workshop on Crowdsourcing and Data Mining
Computers in Human Behavior
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In tagging systems users can annotate items of interest with free-form terms. A good understanding of usage characteristics of such systems is necessary to improve the design of current and next generation of tagging systems. To this end, this work explores three aspects of user behavior in CiteULike and Connotea, two systems that include tagging features to support online personalized management of scientific publications. First, this study characterizes the degree to which users re-tag previously published items and reuse tags: 10 to 20% of the daily activity can be characterized as re-tagging and about 75% of the activity as tag reuse. Second, we use the pairwise similarity between users' activity to characterize the interest sharing in the system. We present the interest sharing distribution across the system, show that this metric encodes information about existing usage patterns, and attempt to correlate interest sharing levels to indicators of collaboration such as co-membership in discussion groups and semantic similarity of tag vocabularies. Finally, we show that interest sharing leads to an implicit structure that exhibit a natural segmentation. Throughout the paper we discuss the potential impact of our findings on the design of mechanisms that support tagging systems.