Design of the ontological model of user`s informational need in semantic search

Design of the ontological model of user’s informational need that is satisfied by means of semantic search is analyzed. The structure of this model (it’s main components - users and user`s personal program agents, informational resources, domain ontologies, informational objects etc. and relations between these components), means of model refinement and method of its use for semantic search are proposed. Reasonability of ontological approach for development of this model that represent personal (about users) and collaborative (about groups of users) knowledge is grounded. Paradigm of intelligent software agents is used for description of retrieval system behavior forecasting.