DIANA, a joint project provided by an international consortium of libraries and human rights organizations, is dedicated to the construction of a comprehensive database of documents essential to human rights research. Currently, segments of the database are hosted by four libraries. Each library provides a unique set of documents for the collaborative database. The Yale Law School Library contains legal briefs, organizational charters, treaty texts, and bibliographies related to human rights. Unfortunately, users cannot query all four hosts at the same time; however, each host attempts to eliminate document duplication within the database as a whole in order to minimize overlap. Consequently, users must select a relevant host before searching or conduct parallel searches.