\image html polyline_dlg.png
A polyline represents a section or a set of sections. Each section is constructed from a sequence of 2D points
-connected by either linear segments or an interpolation curve. Every section has its own attributes:
+connected by either linear segments or an interpolation curve. Every section has its own attributes:
- \b Name,
- \b Type (Polyline or Spline),
- \b Closed flag.
