Syntaxe
=======

.. code-block:: text

    char_ther = AFFE_CHAR_THER(
        ◆ MODELE = modele,
        ◇ DOUBLE_LAGRANGE = / "OUI" (par défaut),
                            / "NON",
          | EVOL_CHAR = evol_char,
        ◆ | TEMP_IMPO = _F(
               ◆ | TOUT = "OUI" (ou non renseigné),
                 | GROUP_MA = grma,
                 | GROUP_NO = grno,
               ◇ SANS_GROUP_MA = grma,
               ◇ SANS_GROUP_NO = grno,
               ◆ | TEMP = float,
                 | TEMP_MIL = float,
                 | TEMP_SUP = float,
                 | TEMP_INF = float,
            ),
          | SOURCE = _F(
               ◇ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = grma,
               ◆ / SOUR_CALCULEE = cham_elem / cham_no,
                 / SOUR = float,
            ),
          | FLUX_REP = _F(
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = grma,
               ◆ | FLUN = float,
                 | FLUN_INF = float,
                 | FLUN_SUP = float,
                 | CARA_TORSION = table,
            ),
          | ECHANGE = _F(
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = grma,
               ◆ | COEF_H = float,
                 | COEF_H_INF = float,
                 | COEF_H_SUP = float,
               ◇ & TEMP_EXT = float,
               ◇ & TEMP_EXT_INF = float,
               ◇ & TEMP_EXT_SUP = float,
            ),
          | ECHANGE_PAROI = _F(
               ◆ / GROUP_MA_1 = grma,
                 / FISSURE = fiss_xfem,
               ◆ / GROUP_MA_2 = grma,
               # Si: not exists("FISSURE")
                   ◆ COEF_H = float,
                   ◇ TRAN = float,
               # Si: exists("FISSURE")
                   ◆ / COEF_H = float,
                     / TEMP_CONTINUE = "OUI" (ou non renseigné),
            ),
          | PRE_GRAD_TEMP = _F(
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = grma,
               ◆ | FLUX_X = float,
                 | FLUX_Y = float,
                 | FLUX_Z = float,
            ),
          | LIAISON_DDL = _F(
               ◇ GROUP_NO = grno,
               ◇ DDL = / "TEMP",
                       / "TEMP_MIL",
                       / "TEMP_INF",
                       / "TEMP_SUP",
                       / "H1",
               ◆ COEF_MULT = float,
               ◆ COEF_IMPO = float,
            ),
          | LIAISON_GROUP = _F(
               ◆ / GROUP_MA_1 = grma,
                 / GROUP_NO_1 = grno,
               ◆ / GROUP_NO_2 = grno,
                 / GROUP_MA_2 = grma,
               ◇ SANS_GROUP_NO = grno,
               ◇ DDL_1 = / "TEMP" (par défaut),
                         / "TEMP_MIL",
                         / "TEMP_INF",
                         / "TEMP_SUP",
                         / "H1",
               ◆ COEF_MULT_1 = float,
               ◇ DDL_2 = / "TEMP" (par défaut),
                         / "TEMP_MIL",
                         / "TEMP_INF",
                         / "TEMP_SUP",
                         / "H1",
               ◆ COEF_MULT_2 = float,
               ◆ COEF_IMPO = float,
               ◇ TRAN = float,
               ◇ ANGL_NAUT = float,
               ◇ CENTRE = float,
            ),
          | LIAISON_UNIF = _F(
               ◆ / GROUP_NO = grno,
                 / GROUP_MA = grma,
               ◇ DDL = / "TEMP" (par défaut),
                       / "TEMP_MIL",
                       / "TEMP_INF",
                       / "TEMP_SUP",
                       / "H1",
            ),
          | LIAISON_CHAMNO = _F(
               ◆ CHAM_NO = cham_no,
               ◆ COEF_IMPO = float,
            ),
          | RAYONNEMENT = _F(
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = grma,
               ◆ SIGMA = float,
               ◆ EPSILON = float,
               ◆ TEMP_EXT = float,
            ),
          | LIAISON_MAIL = _F(
               ◇ GROUP_MA_MAIT = grma,
               ◆ | GROUP_MA_ESCL = grma,
                 | GROUP_NO_ESCL = grno,
               ◇ TRAN = float,
               ◇ ANGL_NAUT = float,
               ◇ CENTRE = float,
               ◇ ELIM_MULT = / "OUI" (par défaut),
                             / "NON",
               ◇ DISTANCE_MAX = float,
               ◇ DISTANCE_ALARME = float,
            ),
          | CONVECTION = _F(
               ◆ VITESSE = cham_no,
            ),
        ◇ INFO = / 1 (par défaut),
                 / 2,
    )
    
    ◆ : obligatoire
    ◇ : optionnel
    ⟐ : présent par défaut
    & : ensemble
    / : un seul parmi
    | : plusieurs choix possibles