Learning online discussion structures by conditional random fields

Online forum discussions are emerging as valuable information repository, where knowledge is accumulated by the interaction among users, leading to multiple threads with structures. Such replying structure in each thread conveys important information about the discussion content. Unfortunately, not all the online forum sites would explicitly record such replying relationship, making it hard for both users and computers to digest the information buried in a discussion thread. In this paper, we propose a probabilistic model in the Conditional Random Fields framework to predict the replying structure for a threaded online discussion. Different from previous replying relation reconstruction methods, most of which fail to consider dependency between the posts, we cast the problem as a supervised structure learning problem to incorporate the features capturing the structural dependency and learn their relationship. Experiment results on three different online forums show that the proposed...

• Type: Journal
• Year: 2011
• Where: SIGIR
• Authors: Hongning Wang, Chi Wang, ChengXiang Zhai, Jiawei Han
• Keywords: Information Repository, Information Technology, Recognition Models, Reconstruction Methods, SIGIR 2011