An Information-Theoretic Definition of Similarity
ICML '98 Proceedings of the Fifteenth International Conference on Machine Learning
Chi2: Feature Selection and Discretization of Numeric Attributes
TAI '95 Proceedings of the Seventh International Conference on Tools with Artificial Intelligence
Usage patterns of collaborative tagging systems
Journal of Information Science
Why we tag: motivations for annotation in mobile and online media
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
What drives content tagging: the case of photos on Flickr
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Statistical properties of community structure in large social and information networks
Proceedings of the 17th international conference on World Wide Web
Microscopic evolution of social networks
Proceedings of the 14th ACM SIGKDD international conference on Knowledge discovery and data mining
Classifying tags using open content resources
Proceedings of the Second ACM International Conference on Web Search and Data Mining
A measurement-driven analysis of information propagation in the flickr social network
Proceedings of the 18th international conference on World wide web
Individual and social behavior in tagging systems
Proceedings of the 20th ACM conference on Hypertext and hypermedia
I tag, you tag: translating tags for advanced user models
Proceedings of the third ACM international conference on Web search and data mining
Folks in Folksonomies: social link prediction from shared metadata
Proceedings of the third ACM international conference on Web search and data mining
Proceedings of the 21st ACM conference on Hypertext and hypermedia
Suggesting friends using the implicit social graph
Proceedings of the 16th ACM SIGKDD international conference on Knowledge discovery and data mining
Proceedings of the 16th ACM SIGKDD international conference on Knowledge discovery and data mining
Friendship, collaboration and semantics in Flickr: from social interaction to semantic similarity
Proceedings of the International Workshop on Modeling Social Media
Personalized search by tag-based user profile and resource profile in collaborative tagging systems
CIKM '10 Proceedings of the 19th ACM international conference on Information and knowledge management
Kodak moments and Flickr diamonds: how users shape large-scale media
Proceedings of the international conference on Multimedia
Community detection using a measure of global influence
SNAKDD'08 Proceedings of the Second international conference on Advances in social network mining and analysis
Social Link Prediction in Online Social Tagging Systems
ACM Transactions on Information Systems (TOIS)
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In most social networks, measuring similarity between users is crucial for providing new functionalities, understanding the dynamics of such networks, and growing them (e.g., people you may know recommendations depend on similarity, as does link prediction). In this paper, we study a large sample of Flickr user actions and compare tags across different explicit and implicit network relations. In particular, we compare tag similarities in explicit networks (based on contact, friend, and family links), and implicit networks (created by actions such as comments and selecting favorite photos). We perform an in-depth analysis of these five types of links specifically focusing on tagging, and compare different tag similarity metrics. Our motivation is that understanding the differences in such networks, as well as how different similarity metrics perform, can be useful in similarity-based recommendation applications (e.g., collaborative filtering), and in traditional social network analysis problems (e.g., link prediction). We specifically show that different types of relationships require different similarity metrics. Our findings could lead to the construction of better user models, among others.