This article examines instrumental support issues of complex technological objects simulation on the level of specialized container and string libraries - tools, aimed for elaboration of real-time visualization systems. Such system, destined for the purposes of computation's visualization and control, displays vector object-oriented 2D open-text formatted schemes with large number of simulated object's equipment pieces. Numerous modifications made throughout design of complex technological object suggest treating scheme graphical objects and their dynamic behaviour as entities with flexible structure - associative string-indexed containers. This approach simplifies visualization system development and maintenance under simulated sub-objects' types and dynamic behaviour patterns indeterminacy condition. The paper emphasizes the significance of rapid string comparison and container's item lookup by given string-key for application's performance. Present article also stresses the importance of string and container libraries reliability as a vital condition of visualization system sustainability.