Syntax
=====

.. code-block:: text

    subdue = DEFI_COMPOSITE (
        ◆ COUCHE = _F (
             ◆ EPAIS = float,
             ◆ MATER = subdue,
             ◇ ORIENTATION = float,
          ),
        ◇ IMPRESSION = _F (
             ◇ UNITE = unit (default: 8),
          ),
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices