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 polyester fiber (FTC)
                   1 Product elasterell-p fiber (FTC)
                   2 Product "triexta" fiber (FTC)