Abstract <p>Modern methods of information modeling of organizational-business and production-technological processes are considered. It is shown that the main problem is the lack of subject content in the symbols that are used in graphic notations. A method for constructing a formal-semantic alphabet of processes (functional units) is proposed, the elements of which, first, satisfy all of the requirements for formal systems and, second, have subject-oriented content as intersections of material, energy and information links. It is shown that the set of elements of the proposed alphabet is an algebraic group and also corresponds to the definition of a generator, as the main initial concept of pattern theory. At the same time, the example of a specific generator as a universal operator noted in the theory is clarified. The correspondence between some concepts and procedures of pattern theory and the concepts and procedures of the information modeling of processes is analyzed. This allowed to substantiate the possibility and expediency of using the formal apparatus of pattern theory (image algebra) for the formalization of information-modeling procedures.</p>