Natural language information retrieval: progress report

Natural language processing (NLP) techniques may hold a: tremendous potential for overcoming the inadequacies of purely quantitative methods of text information retrieval, but the empirical evidence to support such predictions has thus far been inadequate and appropriate scale evaluations have been slow to emerge. In this paper, we report on the progress of the-Natural Language Information Retrieval project, a joint effort of several sites led by GE Research and its evaluation the 6th Text Retrieval Conference (TREC-6). In this paper we describe the 'stream- architecture', a method we designed to combine evidence obtained from several different document representations. Some of the document representations used in the experiments described here involved the use of phrases and proper names computed using Natural Language Processing techniques. (C) 1999 Elsevier Science Ltd. All rights reserved.