Syntax
=====

.. code-block:: text

    spectrum = DEFI_SPEC_TURB (
        ◆/SPEC_LONG_COR_1 = _F (
               ◆ LONG_COR = float,
               ◆ PROF_VITE_FLUI = formula/tablecloth/function,
               ◆ VISC_CINE = float,
            ),
          /SPEC_LONG_COR_2 = _F (
               ◆ LONG_COR = float,
               ◆ PROF_VITE_FLUI = formula/tablecloth/function,
               ◇ FREQ_COUP = float (default: 0.1),
               ◇ PHI0 = float (default: 0.0015),
               ◇ BETA = float (default: 2.7),
            ),
          /SPEC_LONG_COR_3 = _F (
               ◆ LONG_COR = float,
               ◆ PROF_VITE_FLUI = formula/tablecloth/function,
               ◇ FREQ_COUP = float (default: 0.2),
               ◇ PHI0_1 = float (default: 0.005),
               ◇ BETA_1 = float (default: 0.5),
               ◇ PHI0_2 = float (default: 4e-05),
               ◇ BETA_2 = float (default: 3.5),
            ),
          /SPEC_LONG_COR_4 = _F (
               ◆ LONG_COR = float,
               ◆ PROF_VITE_FLUI = formula/tablecloth/function,
               ◆ TAUX_VIDE = float,
               ◇ BETA = float (default: 2.0),
               ◇ GAMMA = float (default: 4.0),
            ),
          /SPEC_CORR_CONV_1 = _F (
               ◆ LONG_COR_1 = float,
               ◇ LONG_COR_2 = float,
               ◆ VITE_FLUI = float,
               ◆ RHO_FLUI = float,
               ◇ FREQ_COUP = float,
               ◇ K = float (default: 0.0058),
               ◆ D_ FLUI = float,
               ◇ COEF_VITE_FLUI_A = float,
               ◇ COEF_VITE_FLUI_O = float,
               ◇ METHODE =/"AU_YANG ",
                           /"GENERALE" (by default),
                           /"CORCOS ",
            ),
          /SPEC_CORR_CONV_2 = _F (
               ◆ FONCTION = formula/tablecloth/function,
               ◆ LONG1_F = formula/tablecloth/function,
               ◆ LONG2_F = formula/tablecloth/function,
               ◆ VITE_FLUI = float,
               ◇ FREQ_COUP = float,
               ◇ METHODE =/"AU_YANG ",
                           /"CORCOS ",
               ◇ COEF_VITE_FLUI_A = float,
               ◇ COEF_VITE_FLUI_O = float,
            ),
          /SPEC_CORR_CONV_3 = _F (
               ◆ TABLE_FONCTION = table_function,
            ),
          /SPEC_FONC_FORME = _F (
               ◆/INTE_SPEC = interspectrum,
                 /GRAPPE_1 =/"DEBIT_180 ",
                              /"DEBIT_300 ",
               ◇ & FONCTION = table_function,
               ◆ GROUP_NO = big,
               ◆ CARA_ELEM = cara_elem,
               ◆ MODELE = model,
            ),
          /SPEC_EXCI_POINT = _F (
               ◆/INTE_SPEC = interspectrum,
                 /GRAPPE_2 =/"ASC_CEN ",
                              /"ASC_EXC ",
                              /"DES_CEN ",
                              /"DES_EXC ",
               # If: exists (" INTE_SPEC ")
                   ◆ NATURE =/"FORCE ",
                              /"MOMENT ",
                   ◆ ANGLE = float,
                   ◆ GROUP_NO = big,
               # If: exists (" GRAPPE_2 ")
                   ◆ RHO_FLUI = float,
                   ◆ GROUP_NO = big,
               ◆ CARA_ELEM = cara_elem,
               ◆ MODELE = model,
            ),
        ◇ TITRE = text,
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices