| Name | Value | Description |
| Arc2DCurveType | 1 | Transient 2D arc. |
| Circle2DCurveType | 2 | Transient 2D circle. |
| Ellipse2DCurveType | 3 | Transient 2D ellipse. |
| EllipticalArc2DCurveType | 4 | Transient 2D elliptical arc. |
| InfiniteLine2DCurveType | 5 | Transient 2D infinite line. |
| Line2DCurveType | 0 | Transient 2D line segment. |
| NurbsCurve2DCurveType | 6 | Transient 2D NURBS curve. |