Syntax
=====

.. code-block:: text

    formula = DEFI_PROP_ALEA (
        ◆ INIT_ALEA = int,
        ◆ MEDIANE = float,
        ◆ COEF_VARI = float,
        ◆ | LONG_CORR_X = float,
          | LONG_CORR_Y = float,
          | LONG_CORR_Z = float,
        ◇/PRECISION = float,
          /NB_TERM = int,
        # If: exists ('LONG_CORR_X')
            ◆ X_ MINI = float,
            ◆ X_ MAXI = float,
            ◆ NB_TERM_X = int,
        # If: exists ('LONG_CORR_Y')
            ◆ Y_ MINI = float,
            ◆ Y_ MAXI = float,
            ◆ NB_TERM_Y = int,
        # If: exists ('LONG_CORR_Z')
            ◆ Z_ MINI = float,
            ◆ Z_ MAXI = float,
            ◆ NB_TERM_Z = int,
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices