Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Caelum veter. - region of the fixed stars
       Astra Plinius - celestial bodies
       particles
       naturalia - natural bodies
       artefacta - artefacts
         1.1 Product group food products
         1.2 Product group beverages
         2 Product group pharmaceuticals
         3 Product group materials
         4 Product group household products
         5 Product group devices
         6 Product group works of art