Syntaxe
=======

.. code-block:: text

    type_flui_stru = DEFI_FLUI_STRU(
        ◆ / FAISCEAU_TRANS = _F(
               ◇ COUPLAGE = / "OUI",
                            / "NON",
               ◇ CARA_ELEM = cara_elem,
               ◆ PROF_VITE_FLUI = formule / nappe / fonction,
               ◇ PROF_RHO_F_INT = formule / nappe / fonction,
               ◇ PROF_RHO_F_EXT = formule / nappe / fonction,
               ◇ NOM_CMP = / "DX",
                           / "DY",
                           / "DZ",
               ◇ COEF_MASS_AJOU = float,
               ◇ TYPE_PAS = / "CARRE_LIGN",
                            / "TRIA_LIGN",
               ◇ TYPE_RESEAU = int,
               ◇ UNITE_CD = unit (défaut: 70),
               ◇ UNITE_CK = unit (défaut: 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 = modele,
                 & RHO_FLUI = float,
               ◇ & COEF_MASS_AJOU = float,
               ◇ GROUP_NO = grno,
               ◇ UNITE_CA = unit (défaut: 70),
               ◇ UNITE_KA = unit (défaut: 71),
            ),
          / FAISCEAU_AXIAL = _F(
               ◆ / GROUP_MA = grma,
                 / TRI_GROUP_MA = text,
               ◇ VECT_X = float,
               ◇ PROF_RHO_FLUI = formule / nappe / fonction,
               ◇ PROF_VISC_CINE = formule / nappe / fonction,
               ◆ / CARA_ELEM = cara_elem,
                 / RAYON_TUBE = float,
               ◇ & COOR_TUBE = float,
               ◇ PESANTEUR = float,
               ◇ RUGO_TUBE = float,
               ◇ & CARA_PAROI = / "YC",
                                / "ZC",
                                / "R",
                                / "HY",
                                / "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" (par défaut),
                             / "NON",
               ◆ GROUP_MA_INT = grma,
               ◆ GROUP_MA_EXT = grma,
               ◆ VECT_X = float,
               ◆ CARA_ELEM = cara_elem,
               ◆ MATER_INT = mater,
               ◆ MATER_EXT = mater,
               ◆ 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 (par défaut),
                 / 2,
    )
    
    ◆ : obligatoire
    ◇ : optionnel
    ⟐ : présent par défaut
    & : ensemble
    / : un seul parmi
    | : plusieurs choix possibles