From CAD Curve or Wire
This command converts CAD linear (CAD Curve and/or CAD Wire) into polylines.
Requirements
Select the CAD linear shapes you want to convert and launch the command.
- In the Options settings, you can choose which discretization will be applied on your CAD shape, i.e. how fine the shape will be sampled into a discrete representation. - If you choose Current deflection, then the deflection will be set from the current display. 
- If you choose Absolute deflection, then the maximum deflection between the CAD model and the discretized shape will be below the chosen distance. 
- If you choose Adaptive deflection, then the deflection will be different for each sub-element of the CAD model. The chosen ratio will be used as a guide to compute a local, adaptive deflection for each sub-element. 
 
Notes
It is recommended to use an adaptive deflection as it requires less computational effort for an equivalent or better quality than an absolute deflection.