| Name | Type | Cardinality | Description |
| SectionRef | SectionRef | [1, 1] | A reference to the parents cross-section. |
| MaterialRef | ocx:MaterialRef_T | [1, 1] | A reference to a material in the catalogue |
| Inclination | ocx:Inclination_T | [1, ∞] | The inclination of the cross-section of a stiffener or a pillar along its trace line. A vector pair giving the local orientation of the web and flange directions at the point given by the Position element. The FlangeDirection is optional and not necessary for a symmetrical cross-section. Only one inclination is necessary for a non-twisted (straight) stiffener or pillar. |
| EdgeCurveRef | EdgeCurveRef | [1, ∞] | A reference to a Panel, Plate or bracket boundary curve. Used as landing curve for a faceplate or edge reinforcement stiffener. |
| HoleContourRef | ocx:HoleContourRef_T | [1, ∞] | A reference to a catalogue 2D hole contour |
| GridRef | GridRef | [1, ∞] | An element that makes a reference to a grid definition. An offset along the grid reference normal vector can be given. |
| TraceLine | TraceLine | [1, ∞] | The landing curve on the moulded panel surface represented by any Curve3D type. |
| MassProperties | ocx:MassProperties_T | [1, 1] | The mass properties of structure objects (weight and centre of gravity). These properties are provided by the exporting application and can be used as a quality measure by the receiving application to ensure correctness of the import. Both moulded and volume properties can be provided. The volume properties represent the physical mass property of the structure part, while the moulded properties are idealised. |
| ExternalGeometryRef | ocx:ExternalGeometryRef_T | [0, 1] | The ExternalGeometryRef element is used to point to an external geometry representation of the parent entity (e.g. Plate, Stiffener, Bracket, Member). |
| 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. |