====== FaceBoundaryCurve ======

A collection of 3D curves making up a closed boundary.

===== Attributes =====

^ Name ^ Type ^ Use ^ Description ^
| isUVspace | xs:boolean | optional | If set to True, the FacBoundaryCurve is defined in the parametric UV space. The Pont3D X and Y correspond to U and V, while the Z coordinate is disregarded. The default is False, i.e., the FaceBoundaryCurve is defined in 3D space. |

===== Children =====

^ Name ^ Type ^ Cardinality ^ Description ^
| [[.:circle3d|Circle3D]] | Circle3D | [1, ∞] | A circle in 3D space. |
| [[.:circumarc3d|CircumArc3D]] | ocx:CircumArc3D_T | [1, ∞] | 3D Line/Arc representation. Represents a semicircle uniquely defined by three points in 3D space given by the start position, intermediate position and the end position.. |
| [[.:circumcircle3d|CircumCircle3D]] | ocx:CircumCircle3D_T | [1, ∞] | Definition of a circle in 3D space by a circum-circle of 3 points. |
| [[.:compositecurve3d|CompositeCurve3D]] | ocx:CompositeCurve3D_T | [1, ∞] | The concept of a composite curve composed of a collection of Line3D, CircumArc3D and/or NURBS segments. Curves are sorted end to end and have C0 continuity across each segment in the CompositeCurve3D definition. |
| [[.:ellipse3d|Ellipse3D]] | Ellipse3D | [1, ∞] | An ellipse in 3D space. |
| [[.:line3d|Line3D]] | ocx:Line3D_T | [1, ∞] | A straight line defined by two points. |
| [[.:nurbs3d|NURBS3D]] | ocx:NURBS3D_T | [1, ∞] | Non-Uniform Rational Spline Base curve definition. |
| [[.:polyline3d|PolyLine3D]] | ocx:PolyLine3D_T | [1, ∞] | A list of 3D points defining a sequence of linear segments. Repeat the first position at the end of the last line segment to form a closed contour. |

^ Schema version | 3.2.0 |
^ Schema location | https://3docx.org/fileadmin/ocx_schema/V320/OCX_Schema.xsd |
^ Namespace | https://3docx.org/fileadmin//ocx_schema//V320//OCX_Schema.xsd |
^ Created | 2026-09-10T10:07:41Z |