Some CAD systems import PARTsolutions parts with the help of macros:
CATIA V4 IUA Macro 3D (see Section 3.1.9.1.16.1, “CATIA Macro ”)
SolidDesigner Macro 3D (see Section 3.1.9.1.16.2, “SolidDesigner/OneSpace Modeling Macro ”)
SolidWorks Macro 3D (see Section 3.1.9.1.16.3, “SolidWorks Macro ”)
Macros record the individual steps that are taken during the creation of a geometry. With the help of this record, the geometry can then later be "reproduced" in the CAD system.
In other words, the imported files are available without the usual connected information (dimensioning, part descriptions, etc.). In addition, no thread display is possible for example.