In this article the semantic model of the presentation educational material of the electronic textbook, which is being distributed by the GSM network services, is obtained by means of the theory of describing the domain knowledge based on semantic network. The three types of relationships between the structural elements are identified. The mathematical description using tuples is pointed out. The three differences of the developed model from the familiar models of the structures of educational materials of electronic textbooks are identified. These results enable the development of electronic textbooks, which may be effectively disseminated through GSM mobile communication channels.
electronic textbook, the structure of educational material, semantic network, GSM network services