Reading the file into any Inventor application will allow the scene graph containing the node to be used by that application. For example if the Extrusion node has been installed, reading the following file into ivview should display a twisted square duct. Using extension nodes in programs A user written program can obviously use an extension node by reading its definition in from a file or an internal string. However, Inventor's type system also allows extension nodes to be created and have their fields manipulated directly. An SoType can be created from a string and an instance of a type can be created from the SoType.
All nodes support introspection operations on their fields.
The web page for each module or node gives the type for each field.