Information Retrieval With Language Knowledge

Abstract. The introduction of Swedish made it possible for Lexware ® to be tested for the first time in CLEF. Lexware is a natural language system applied in an information retrieval task and not an information retrieval systems using NLP techniques, therefore it is interesting to compare its results with other less odd IR systems. We experience that separate evaluation of document description and query building would provide yet better testing for our system. 1 A Natural Language System for Swedish Lexware is a natural language system applied in an information retrieval task and not an information retrieval systems using NLP techniques, like e.g. NLIR [4]. It can be considered odd also among natural language processing systems, if the latter are assumed to focus on syntactic analysis (c.f. [3]). Text-analysis is shallow and it is not demanding in terms of computing power and storage [1]. The strength of the system is its rich lexicon and the possibility to expand the lexicon with external items without negative impact on access time [2]. The vocabulary of about 80 000 lexical items is richly interconnected by relations of form and content: derivational origin, synonymy