| Name | Description | |
|---|---|---|
 | CounterClockWise | Determine direction of drilling this element. |
| EndPoint | End point of contour element relative to reference point. |
| MiddlePoint | Middle point of contour element relative to reference point. |
| StartPoint | Starting point of contour element relative to reference point. |
| TypeOfConture | Type of curve which connects start with end point. |