.... an experimental information retrieval system, developed in the Centre for Interactive Systems Research in the Department of Information Science at City University, London.
.... twelve years of research in probabilistic retrieval and information-seeking behaviour.
.... a platform for testing and evaluation, via "live" and "laboratory" experiments.
The following links provide information (including bibliographies) relating to past Okapi projects, illustrating the development of progressively more sophisticated retrieval algorithms, and a series of experiments to determine how best to present the principles of relevance-based query expansion at the user interface.
Alternatively, see the special edition of the Journal of Documentation Volume 3, Issue 1, January 1997, ISSN 022 0418, which contains eight papers and three research briefs on various aspects of the Okapi system and Okapi-based projects.At present, network access to Okapi is available only via a VT100 interface. A Web interface will be available soon.
Click HERE to access the Okapi VT100 interface. Provide 'okapi92' as the login name. No password is required.
Last updated: July 1998
By: Susan Jones
sa386@city.ac.uk