dwg all vendors is used (except Autodesk) license from Open Design Alliance (USA). In particular, the mechanism of direct modeling in KOMPAS-3D is licensed at Bricsys company, in T-FLEX the geometrical core of Parasolid of Siemens PLM Software company, and library for work with files of. While licensors a component and libraries of the Russian CAD are just the foreign companies. One of beneficiaries of BricsCAD is the Russian LEDAS company which developed the technology of variation direct modeling used in BricsCAD Platinum.
