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
                 1 Product azlon fiber (FTC)
                 2 Product natural rubber fiber
                 3.1 Product alginate fiber (ISO)
                 3.2 Product chitin fiber
                 3.3 Product group cellulosic fibers