Across the Bridge: CLEF 2001 — Non-english Monolingual Retrieval. The French Task

Abstract

This paper presents work on document retrieval based on first time participation in the CLEF 2001 monolingual retrieval task using French. The experiment findings indicate that Okapi, the text retrieval system in use, can successfully be used for non-English text retrieval. A lot of internal preprocessing is required in the basic search system for conversion into Okapi access formats. Various shell scripts were written to achieve the conversion in a UNIX environment, failure of which would significantly have impeded the overall performance. Based on the experiment findings using Okapi-originally designed for English - it was clear that, although most European languages share conventional word boundaries and variant word morphemes formed by the addition of suffixes, there is significant difference between French and English retrieval depending on the adaptation of indexing and search strategies in use. No sophisticated method for higher recall and precision such as stemming techniques, phrase translation or de-compounding was employed for the experiment and our results were suggestively poor. Future participation would include more refined query translation tools.