We fhst built the transducer representing all the entries of DELAF along with their inflectionnal code. Each entry defines a partial function, as in: inculpons ~ inculper ,V&Pl p which corresponds to the first person plural in the present tense of the verb inculper (to charge someone). The union of these 700,000 partial functions leads to the transducer DELAF stored in 1Mb with a look-up procedme of 1,100 words per second. The 70 two-level rules that describe the way characteas ate changed when prefixes or suffixes are added to words are themselves transducers (Karttunen et al., 1992). .
