| Name | Description |
| Add | Method that creates a fixed spline based on an input NURBS definition. |
| AddByEdge | Method that creates a fixed spline based on an input transient Edge object. This capability is useful because some edges are defined precisely using a procedural algorithm. Converting these to a NURBS curves results in an approximation of the procedural curve. The SketchFixedSpline3D object created with this method has the full accuracy of the procedural curve without any approximation. |
| Name | Description |
| Application | Returns the top-level parent application object. When used the context of Inventor, an Application object is returned. When used in the context of Apprentice, an ApprenticeServer object is returned. |
| Count | Property that specifies the number of items in the collection. |
| Item | Method that returns the specified SketchFixedSpline3D object from the collection. |
| Type | Returns an ObjectTypeEnum indicating this object's type. |