CoordinateDouble builds geometry by defining a set of 3D coordinate triplet values. CoordinateDouble is used by IndexedFaceSet, IndexedLineSet, LineSet, PointSet, Triangle* and IndexedTriangle* nodes. CoordinateDouble is also used by NurbsPositionInterpolator and NurbsOrientationInterpolator.
The CoordinateDouble node belongs to the NURBS component and its container field is coord. It is available since X3D version 3.0 or later.