Defines the shape of an airfoil. Defines a seqience of point coordinates describing the shape of an airfoil element. Defines a single airfoil element. Defines a collection of airfoil element objects. Defines a point or vector in space. Defines a transformation for an element. Transformation order is: 1) scaling, 2) rotation, 3) translation. Defines a translation in x, y and z direction. Defines a rotation around x, y and z axis. Defines a scaling in x, y and z direction.