/INSIDE – The lines must be completely inside the
polygons.

/OUTSIDE – The lines must be completely outside the
polygons.

/OVERLAP – The lines overlap a polygon.

/INSIDETOUCH – The lines are inside but touching
the polygon boundary.

/OUTSIDETOUCH – The lines are outside but touching
the polygon boundary. 

/CLIP – Overlapping lines are cut in two pieces at
the intersection with the polygons. 

The /INSIDE qualifier is used as the default if none of
the other operators are used. 

When using /CLIP, the /INSIDE qualifier becomes synonymous with /INSIDETOUCH and /OUTSIDE becomes synonymous with /OUTSIDETOUCH.