Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       artefacta - artefacts
         Product group materials
           Product group fibers
             Product group manufactured fibers (FTC)
               Product group natural polymer fibers
                 Product group cellulosic fibers
                   1.1 Product acetate fiber (FTC)
                   1.2 Product triacetate fiber
                   2.1 Product rayon fiber (FTC)
                   2.2 Product lyocell fiber