Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       artefacta - artefacts
         Product group materials
           Product group fibers
             Product group manufactured fibers (FTC)
               Product group synthetic fibers
                 Product polyamide fiber (ISO)
                   Product nylon fiber (FTC)
                     Product nylon 6 fiber
                     Product nylon 6/6 fiber