Syntax
=====

.. code-block:: text

    function = DEFI_CONSTANTE (
        ◇ NOM_RESU = text (default: "TOUTRESU "),
        ◆ VALE = float,
        ◇ TITRE = text,
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices