Syntax
=====

.. code-block:: text

    TEST_FONCTION (
        ◇ VALEUR = _F (
             ◆ FONCTION = formula/function_c/function/table,
             ◇ NOM_PARA = text,
             ◆/VALE_PARA = float,
               /INTERVALLE = float,
             # If: True
                 ◆/VALE_CALC_C = complex,
                   /VALE_CALC = float,
                 ◇ VALE_ABS =/"OUI ",
                              /"NON" (by default),
                 ◇ TYPE_TEST =/"SOMM_ABS ",
                               /"SOMM ",
                               /"MAX ",
                               /"MIN ",
                 ◇ TOLE_MACHINE = float (default: 1e-06),
                 ◇ CRITERE =/"RELATIF" (by default),
                             /"ABSOLU ",
                 # If: exists (" REFERENCE ")
                     ◆/VALE_REFE_C = complex,
                       /VALE_REFE = float,
                     ◇ PRECISION = float (default: 0.001),
                 ◇ REFERENCE =/"ANALYTIQUE ",
                               /"SOURCE_EXTERNE ",
                               /"AUTRE_ASTER ",
                               /"NON_DEFINI ",
                 # If: exists (" VALE_CALC ") and abs (VALE_CALC if type (VALE_CALC) not in (list, tuple) else VALE_CALC [0]) < 1.e-16
                     ◇ ORDRE_GRANDEUR = float,
                 ◇ LEGENDE = text,
          ),
        ◇ ATTRIBUT = _F (
             ◆ FONCTION = formula/function_c/function/table,
             ◇ PARA = float,
             ◇ CRIT_PARA =/"RELATIF" (by default),
                           /"ABSOLU ",
             ◇ PREC_PARA = float (default: 0.001),
             ◆ ATTR =/"NOM_PARA ",
                      /"NOM_RESU ",
                      /"PROL_DROITE ",
                      /"PROL_GAUCHE ",
                      /"INTERPOL ",
                      /"PROL_GAUCHE_FONC ",
                      /"PROL_DROITE_FONC ",
                      /"INTERPOL_FONC ",
                      /"NOM_PARA_FONC ",
             ◆ ATTR_REFE = text,
             ◇ REFERENCE =/"ANALYTIQUE ",
                           /"SOURCE_EXTERNE ",
                           /"AUTRE_ASTER ",
          ),
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices