Class
class Thing class GeometricItem relation material range Material, cardinality [0, 1] class Curve property length range double (64 bit), cardinality [0, 1] class PolyLine3D relation pointReferences range Point, cardinality [0, Inf> property coordinates range double (64 bit), cardinality [0, Inf> property points range double (64 bit), cardinality [0, Inf> property tangentArray range double (64 bit), cardinality [0, Inf>