29. The query expander of claim 28, wherein the set of transducers includes a prefix transducer, a stem transducer, a derivational suffix transducer, and an inflectional suffix transducer.
29. The query expander of claim 28, wherein the set of transducers includes a prefix transducer, a stem transducer, a derivational suffix transducer, and an inflectional suffix transducer. 30. The query expander of claim 29, wherein the derivational generator also includes a database of stored productive suffixes.