IR-n System at Clef 2002

Passage Retrieval is an alternative to traditional document-oriented Information Retrieval. These systems use contiguous text fragments (or passages) instead of full documents as the basic unit of information. The IR-n system is a passage retrieval system that uses groups of contiguous sentences as units of information. This paper reports on experiments with the IR-n system at CLEF-2002 where it has obtained considerably better results than in the previous participation in CLEF-2001.