Hello Sebastian,
In order to import DXF files into Open CASCADE you need to acquire licenses of "DXF Import-Export" component. In addition to topology/geometry it also processes attached colors and names. Please consult http://www.opencascade.com/products/dataex/dxf/ for further details.
If you need more information, including pricing, do not hesitate to contact me.
Sincerely yours,
Commenter-1
--
Commenter-1 - Pre-sales and qualification manager
Open CASCADE S.A.
email: [email removed]
http://www.opencascade.com
Open CASCADE, the open source approach at the service of industry