The paper presents an architecture of the information system based on intellectual technologies aimed to serve information needs of heterogeneous users of an industrial enterprise. Technologies for automated creation of semantic model of the subject domain based on the principle "user as an expert" as well as the model of a user's mental stereotypes are discussed. To improve effectiveness of the system in sense of information search speed the authors propose techniques for synthesis of cognitive navigation interface and for information retrieval on the base of subtractive relation. The effectiveness of proposed technologies is confirmed by experiment.