The collection of refrence planes used to limit geometries ReferencePlanes has the following child elements:
| Child | Namespace | Type | Use | Cardinality | Choice | Description |
|---|---|---|---|---|---|---|
| XRefPlanes | ocx | ocx:RefPlanes_T | opt. | [0, ∞] | True | Frame table positions along X axis. Used to limit geometry and define topology. |
| YRefPlanes | ocx | ocx:RefPlanes_T | opt. | [0, ∞] | True | The definition of a reference grid in the Vessel Y-direction. The authoring application must export ALL the RefPlane positions. If more than one YRefPlanes definition is exported, the authoring application shall identify the main reference system by setting the isMainSytem=true. |
| ZRefPlanes | ocx | ocx:RefPlanes_T | opt. | [0, ∞] | True | The definition of a reference grid in the Vessel Z-direction. The authoring application must export ALL the RefPlane positions. If more than one ZRefPlanes definition is exported, the authoring application shall identify the main reference system by setting the sMainSytem=true. |