The method for encoding graphic data using the STEP standard was considered. This standard allows you to describe the full life cycle of a product from design to quality control. The possibilities have been investigated for transmission and transformation of STEP data. The order was analyzed for storage and synthesis of data based on dividing a software graph into subgraphs of local algorithms. There was an algorithm developed for syntactic analysis of STEP file format data, and software implemented for displaying graphic information, which allows you to control 3D visualization of machine-building parts.