In this paper, we introduced a new approach of measure the semantic relatedness between terms. The approach utilized the folksonomy data from social tagging, so it had advantages like evolution with social cognition. We built a semantic relatedness measurement service - TagRelated! based on the folksonomy data from Delicious.com. Three applications were implemented with TagRelated! to demonstrate its usage and performance. Experiment and user feedback showed the method and service performing well.
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