One of the essential aspects is described of an expert system (called LEXICOGRAPItER), designed to supply the user with diverse brformation about Russian words, h~cluding bibliographic hiformation concemhrg hrdividual lexical entries. Tire lexical database of tire system contahrs semantic btfonnation that catmot be elicited from the existhrg dictionaries. Tire priority is given to semantic features influenchtg lexical or grammatical co-occurrence restrictions. Possibilities are discussed of predicting selectional restrictions on the basis of semantic features of a word bz the lexicon. .
