Content-Based Semantic Tag Ranking for Recommendation

Content-based social tagging recommendation, which considers the relationship between the tags and the descriptions contained in resources, is proposed to remedy the cold-start problem of collaborative filtering. There is such a common phenomenon that certain tag does not appear in the corresponding description, however, they do semantically relate with each other. State-of-the-art methods seldom consider this phenomenon and thus still need to be improved. In this paper, we propose a novel content-based social tag ranking scheme, aiming to recommend the semantic tags that the descriptions may not contain. The scheme firstly acquires the quantized semantic relationships between words with empirical methods, then constructs the weighted tag-digraph based on the descriptions and acquired quantized semantics, and finally performs a modified graph-based ranking algorithm to refine the score of each candidate tag for recommendation. Experimental results on both English and Chinese datasets show that the proposed scheme performs better than several state-of-the-art content-based methods.