Bruce Hedin, bhedin@h5.com H5, 71 Stevenson St., San Francisco, CA 94105, USA ; Open Text Corporation, Ottawa, Ontario, Canada ; National Archives and Records Administration Office of the General Counsel, Suite 3110, College Park, MD 20740, USA ; College of Information Studies ; Institute for Advanced Computer Studies
TREC 2009 was the fourth year of the Legal Track, which focuses on evaluation of search technology for “discovery” (i.e., responsive review) of electronically stored information in litigation and regulatory settings. The track included two tasks: an Interactive task (in which real users could iteratively refine their queries and/or engage in multipass relevance feedback) and a Batch task (twopass search in a controlled setting with some relevant and nonrelevant documents manually marked after the first pass).