The definition of the frame table positions in the Vessel X-direction. The authoring application must export ALL the RefPlane positions. If more than one XRefPlanes definition is exported, the authoring application shall identify the main reference system by setting the isMainSytem=true. It is also possible to give a reversed frame system (positions are given Fore to Aft). This is specified by setting isReversed=true. XRefPlanes has the following child elements:
| Child | Namespace | Type | Use | Cardinality | Choice | Description |
|---|---|---|---|---|---|---|
| DistanceToAP | ocx | ocx:Quantity_T | opt. | [0, 1] | False | If #0/FR0 (FR0 has per definition ReferenceLocation=0) is not located at AP, give the offset here (positive or negative distance). |
| Origin | ocx | ocx:Point3D_T | opt. | [0, 1] | False | The origin of a local or global coordinate system. If not given, it is assumed thet the origin of the reference system at the global origin (0,0,0). |
| RefPlane | ocx | ocx:RefPlane_T | req. | [1, ∞] | False | A reference plane used to define unbounded planar geometry. |
XRefPlanes has the following attributes:
| Attribute | Namespace | Type | Use | Default | Fixed | Description |
|---|---|---|---|---|---|---|
| isReveresed | ocx | xs:boolean | opt. | false | For most vessels the X reference prositions are given aft to forward which is the default. Set isReversed=true if the frame positions are given from fore to aft (noramally this is the case for naval vessels). | |
| isMainSystem | ocx | xs:boolean | opt. | true | True if this is the main reference system definition. |