RALI-OLST Weekly Talks

Exploring Categorization Property of Social Annotations for Information Retrieval

Peng Li (lipeng <at> iro (point) umontreal (point) ca)

RALI, DIRO et Institute of Computing Technology (China)

Wednesday 12 September 2012 at 11:30 AM

Salle 3195, Pavillon André-Aisenstadt

User generated social annotations provide extra information for describing document contents. In this talk, we propose an effective method to model the categorization property of social annotations and explore the potential of combining it with classical language models for improving retrieval performance. Specifically, a new model based on LDA is presented to take annotations as an additional source for generating document contents apart from the document itself.

We describe strategies for representing and weighting the categorization property and develop an efficient inference algorithm. Experiments are carried out on a TREC collection using annotations collected from Delicious.com. Our results demonstrate the usefulness of social annotations for IR.

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