Translations:DXF/4/en

There are many versions of the DXF format. You will hear of certain key versions, such as R12 (from 1992) or R14 (from 1997 which had splines). Later versions of DXF have 3D elements, but these are rarely used or implemented. How you use DXF to share CAD data between programs depends mainly on the limitations and bugs in the corresponding readers/importers and writers/exporters. These are rarely fully documented and can be a great source of frustration.