A Parasolid export is a solid, not just surfaces.
Parasolid does support features in its native mode, just no CAD vendor, even UG who own Parasolid, have implemented Parsolid as a feature modeler. They only use Parasolid to create the basic shape and then do boolean operations to get what you see.
"Wildfires are dangerous, hard to control, and economically catastrophic."
Ben Loosli
CAD/CAM System Analyst
Ingersoll-Rand