| Name | Type | Cardinality | Description |
| BracketRef | BracketRef | [1, ∞] | A reference to a structure Bracket instance. |
| ConnectedBracketRef | ConnectedBracketRef | [1, ∞] | The reference to a connected bracket part of a ConnectionConfiguration. |
| HoleContourRef | ocx:HoleContourRef_T | [1, ∞] | A reference to a catalogue 2D hole contour |
| LugPlateRef | LugPlateRef | [1, ∞] | A reference to a structure LugPlate instance. |
| PillarRef | PillarRef | [1, ∞] | A reference to a structure Pillar instance. |
| PlateRef | PlateRef | [1, ∞] | A reference to a structure Plate instance. |
| StrEdgeReinforcementRef | ocx:StrEdgeReinforcementRef_T | [1, ∞] | A reference to a structure EdgeReinforecement instance. |
| StrSeamRef | StrSeamRef | [1, ∞] | A reference to a structure Stiffener instance. |
| StrStiffenerRef | ocx:StrStiffenerRef_T | [1, ∞] | A reference to a structure Stiffener instance. |
| CustomProperties | ocx:CustomProperties_T | [0, 1] | Container for custom properties. |