Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       artefacta - artefacts
         Product group materials
           1.1 Product group metallic materials
           1.2 Product group inorganic non-metallic materials
           1.3 Product group organic materials
           2 Product group fibers
           2.n1.1 Product paper
           2.n1.2 Product linen paper
           2.n2 Product group textile materials
           3 Product group composite materials