<Vector3D X="5" Y="5" Z="5" />
<Vector3D .../> represents a displacement in 3-D space. It describes the movement of all three coordinates of a 3-D point along the x-, y-, and z-axes. If a three-dimensional line has start point (0,0,0) and end point (5,5,5), then the Vector describing the line segment is (5,5,5)essentially, the difference between the start and end points. Vector3D is a transformation mechanism; specifically, it is used to transform lines within a 3-D space.