TY JOUR TI Ontological Approach to the Development of Unified Knowledge Base of Multimodal Transportations KW Multimodal transportations KW knowledge bases KW ontologies KW cargo traffic management KW digital transformation JO Proceedings of Petersburg Transport University AU Badeckiy, A.P. AU Medved', O.A. PY 2023 IS 20 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"