The article deals with the problem of searching and selecting information. Currently, this kind of problem is solved by using search information systems. The main stage of creating a search information system is the development of the project, which is carried out using the unified modeling language UML and the CASE tool Power Designer. When developing a system project using the UML modeling language, all available information about the designed system is represented as a set of graphical elements, in other words, graphical structures. Such constructions are called diagrams. They reflect the essence of the system and consider it from different sides and represent the processes that take place in it in different ways.