What does the oven function "Pyrolytic" mean?

The pyrolytic selection sends the oven temperature to above 500 degrees Celsius. This temperature carbonises all waste off the interior oven cavity enameling. The oven locks itself at high temperatures for safety. Radiant heat to the kitchen is reduced by quadruple door glazing and an independent cooling fan. The cleaning process is ninety minutes. The removable roof liner, grill/baking tray with grid, chromed wire shelves ad rotisserie assembly are best cleaned by hand.