Syntax
=====

.. code-block:: text

    gene_model = DEFI_MODELE_GENE (
        ◆ SOUS_STRUC = _F (
             ◆ NOM = text,
             ◆ MACR_ELEM_DYNA = macr_elem_dyna,
             ◆ ANGL_NAUT = float,
             ◆ TRANS = float,
          ),
        ◆ LIAISON = _F (
             ◆ SOUS_STRUC_1 = text,
             ◆ INTERFACE_1 = text,
             ◆ SOUS_STRUC_2 = text,
             ◆ INTERFACE_2 = text,
             ◇/GROUP_MA_MAIT_1 = grma,
               /GROUP_MA_MAIT_2 = grma,
             ◇ OPTION =/"REDUIT ",
                        /"CLASSIQUE" (by default),
          ),
        ◇ VERIF = _F (
             ◇ STOP_ERREUR =/"OUI" (by default),
                             /"NON ",
             ◇ PRECISION = float (default: 0.001),
             ◇ CRITERE =/"RELATIF" (by default),
                         /"ABSOLU ",
          ),
        ◇ INFO =/1 (by default),
                 /2,
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices