Syntax
=====

.. code-block:: text

    /map
    /fiel_no = RAFF_XFEM (
        ◇ TYPE =/"DISTANCE" (by default),
                 /"ZONE ",
        ◆ FISSURE = fiss_xfem,
        # If: equal_to (" TYPE ", 'ZONE')
            ◆ RAYON = float,
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices