Syntax
=====

.. code-block:: text

    DEFI_LIST_FREQ (
        ◇/VALE = float,
          /DEBUT = float,
        ◇/INTERVALLE = _F (
               ◆ JUSQU_A = float,
               ◆/NOMBRE = int,
                 /PAS = float,
            ),
        ◇ RAFFINEMENT = _F (
             ◆ LIST_RAFFINE = float,
             ◇ NB_POINTS = int (default: 5),
             ◇ PAS_MINI = float (default: 0.001),
             ◇ CRITERE =/"RELATIF" (by default),
                         /"ABSOLU ",
                         /"LARGEUR_3DB ",
             # If: (equal_to (" CRITERE ", '",' RELATIF ') or equal_to (" CRITERE ",' ABSOLU '))
                 ◇ DISPERSION = float (default: 0.01),
             # If: (equal_to (" CRITERE ", 'LARGEUR_3DB'))
                 ◆/AMOR_REDUIT = float,
                   /LIST_AMOR = listr8,
          ),
        ◇ EQUI_MODES = _F (
             ◇ TYPE_SAISIE =/"LISTE" (by default),
                             /"MATR_ASSE ",
             ◆ FREQ_MIN = float,
             ◆ FREQ_MAX = float,
             # If: (equal_to (" TYPE_SAISIE ", 'LISTE'))
                 ◇ LIST_FREQ = listr8,
             # If: (equal_to (" TYPE_SAISIE ", 'MATR_ASSE'))
                 ◇ MATR_RIGI = matr_asse_depl_r,
                 ◇ MATR_MASS = matr_asse_depl_r,
             ◇ NB_MODES = int (default: 40),
             ◇ NB_POINTS_INIT = int (default: 10),
             ◇ NB_POINTS_SUPP = int (default: 1),
             ◇ ITER_MAXI = int (default: 20),
             ◇ TOLERANCE = float (default: 0.01),
          ),
        ◇ INFO =/1 (by default),
                 /2,
        ◇ TITRE = text,
    )

    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices