Syntax
=====

.. code-block:: text

    flui_stru type = DEFI_FLUI_STRU (
        ◆/FAISCEAU_TRANS = _F (
               ◇ COUPLAGE =/"OUI ",
                            /"NON ",
               ◇ CARA_ELEM = cara_elem,
               ◆ PROF_VITE_FLUI = formula/tablecloth/function,
               ◇ PROF_RHO_F_INT = formula/tablecloth/function,
               ◇ PROF_RHO_F_EXT = formula/tablecloth/function,
               ◇ NOM_CMP =/"DX",
                           /"DY",
                           /"DZ",
               ◇ COEF_MASS_AJOU = float,
               ◇ TYPE_PAS =/"CARRE_LIGN ",
                            /"TRIA_LIGN ",
               ◇ TYPE_RESEAU = int,
               ◇ UNITE_CD = unit (default: 70),
               ◇ UNITE_CK = unit (default: 71),
               ◇ PAS = float,
               ◇ & CSTE_CONNORS = float,
                 & NB_CONNORS = int,
                 & RHO_TUBE = float,
            ),
          /GRAPPE = _F (
               ◆ COUPLAGE =/"OUI ",
                            /"NON ",
               ◇ & GRAPPE_2 =/"ASC_CEN ",
                              /"ASC_EXC ",
                              /"DES_CEN ",
                              /"DES_EXC ",
                 & CARA_ELEM = cara_elem,
                 & MODELE = model,
                 & RHO_FLUI = float,
               ◇ & COEF_MASS_AJOU = float,
               ◇ GROUP_NO = big,
               ◇ UNITE_CA = unit (default: 70),
               ◇ UNITE_KA = unit (default: 71),
            ),
          /FAISCEAU_AXIAL = _F (
               ◆/GROUP_MA = grma,
                 /TRI_GROUP_MA = text,
               ◇ VECT_X = float,
               ◇ PROF_RHO_FLUI = formula/tablecloth/function,
               ◇ PROF_VISC_CINE = formula/tablecloth/function,
               ◆/CARA_ELEM = cara_elem,
                 /RAYON_TUBE = float,
               ◇ & COOR_TUBE = float,
               ◇ PESANTEUR = float,
               ◇ RUGO_TUBE = float,
               ◇ & CARA_PAROI =/"YC",
                                /"ZC",
                                /"R",
                                /"HEY",
                                /"HZ",
                 & VALE_PAROI = float,
               ◇ ANGL_VRIL = float,
               ◇ & LONG_TYPG = float,
                 & LARG_TYPG = float,
                 & EPAI_TYPG = float,
                 & RUGO_TYPG = float,
                 & COEF_TRAI_TYPG = float,
                 & COEF_DPOR_TYPG = float,
                 & COOR_GRILLE = float,
                 & TYPE_GRILLE = int,
            ),
          /COQUE_COAX = _F (
               ◇ MASS_AJOU =/"OUI" (by default),
                             /"NON ",
               ◆ GROUP_MA_INT = GRMA,
               ◆ GROUP_MA_EXT = GRMA,
               ◆ VECT_X = float,
               ◆ CARA_ELEM = cara_elem,
               ◆ MATER_INT = subdue,
               ◆ MATER_EXT = subdue,
               ◆ RHO_FLUI = float,
               ◆ VISC_CINE = float,
               ◆ RUGOSITE = float,
               ◆ PDC_MOY_1 = float,
               ◆ PDC_DYN_1 = float,
               ◆ PDC_MOY_2 = float,
               ◆ PDC_DYN_2 = float,
            ),
        ◇ INFO =/1 (by default),
                 /2,
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices