| Name | Type | Cardinality | Description |
| XRefPlanes | XRefPlanes | [1, 1] | A collection of Y-Z planes used as object limits. Can also be used to create a frame table definition for display purposes. The exporting application will then have to provide all grid positions. |
| YRefPlanes | ocx:RefPlanes_T | [0, 1] | A collection of X-Z planes used as object limits. Can also be used to create a frame table definition for display purposes. The exporting application will then have to provide all grid positions. |
| ZRefPlanes | ocx:RefPlanes_T | [0, 1] | A collection of X-Y planes used as object limits. Can also be used to create a frame table definition for display purposes. The exporting application will then have to provide all grid positions. |
| LocalCartesian | ocx:Transformation_T | [0, 1] | To specify a Local (Orthogonal) Axis System Origin and two of the local X,Y,Z axis need to be specified. When used to specify a Plane the XY (UV) plane is considered. Optional if the coordinate system is referring to the global coordinate frame (world coordinates) |
| Description | xs:string | [0, 1] | Contains a description of the component its parent represents. The description is stored as a string. You can use this element for whatever purposes you require. This element can be used inside many OCX XML elements but is optional. |
| CustomProperties | ocx:CustomProperties_T | [0, 1] | Container for custom properties. |