2. Syntax

char_ther = AFFE_CHAR_THER (
    ◆ MODELE = model,
    ◇ DOUBLE_LAGRANGE =/"OUI" (by default),
                        /"NON ",
      | EVOL_CHAR = evol_char,
    ◆ | TEMP_IMPO = _F (
           ◆ | ALL = "YES" (or not specified),
             | GROUP_MA = grma,
             | GROUP_NO = group,
           ◇ SANS_GROUP_MA = Grma,
           ◇ SANS_GROUP_NO = big,
           ◆ | TEMP = float,
             | TEMP_MIL = float,
             | TEMP_SUP = float,
             | TEMP_INF = float,
        ),
      | SOURCE = _F (
           ◇/TOUT = "OUI" (or not specified),
             /GROUP_MA = grma,
           ◆/SOUR_CALCULEE = cham_elem/cham_no,
             /SOUR = float,
        ),
      | STREAM_REP = _F (
           ◆/TOUT = "OUI" (or not specified),
             /GROUP_MA = grma,
           ◆ | FLUN = float,
             | FLUN_INF = float,
             | FLUN_SUP = float,
             | CARA_TORSION = table,
        ),
      | EXCHANGE = _F (
           ◆/TOUT = "OUI" (or not specified),
             /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,
        ),
      | EXCHANGE_WALL = _F (
           ◆/GROUP_MA_1 = grma,
             /FISSURE = fiss_xfem,
           ◆/GROUP_MA_2 = grma,
           # If: not exists (" FISSURE ")
               ◆ COEF_H = float,
               ◇ TRAN = float,
           # If: exists (" FISSURE ")
               ◆/COEF_H = float,
                 /TEMP_CONTINUE = "OUI" (or not specified),
        ),
      | PRE_GRAD_TEMP = _F (
           ◆/TOUT = "OUI" (or not specified),
             /GROUP_MA = grma,
           ◆ | FLUX_X = float,
             | FLUX_Y = float,
             | FLUX_Z = float,
        ),
      | DDL_LINK = _F (
           ◇ GROUP_NO = big,
           ◇ DDL =/"TEMP ",
                   /"TEMP_MIL ",
                   /"TEMP_INF ",
                   /"TEMP_SUP ",
                   /"H1",
           ◆ COEF_MULT = float,
           ◆ COEF_IMPO = float,
        ),
      | GROUP_LINK = _F (
           ◆/GROUP_MA_1 = grma,
             /GROUP_NO_1 = grno,
           ◆/GROUP_NO_2 = grno,
             /GROUP_MA_2 = grma,
           ◇ SANS_GROUP_NO = big,
           ◇ DDL_1 =/"TEMP" (by default),
                     /"TEMP_MIL ",
                     /"TEMP_INF ",
                     /"TEMP_SUP ",
                     /"H1",
           ◆ COEF_MULT_1 = float,
           ◇ DDL_2 =/"TEMP" (by default),
                     /"TEMP_MIL ",
                     /"TEMP_INF ",
                     /"TEMP_SUP ",
                     /"H1",
           ◆ COEF_MULT_2 = float,
           ◆ COEF_IMPO = float,
           ◇ TRAN = float,
           ◇ ANGL_NAUT = float,
           ◇ CENTRE = float,
        ),
      | UNIF_LINK = _F (
           ◆/GROUP_NO = grno,
             /GROUP_MA = grma,
           ◇ DDL =/"TEMP" (by default),
                   /"TEMP_MIL ",
                   /"TEMP_INF ",
                   /"TEMP_SUP ",
                   /"H1",
        ),
      | FIELD_LINK = _F (
           ◆ CHAM_NO = cham_no,
           ◆ COEF_IMPO = float,
        ),
      | RADIATION = _F (
           ◆/TOUT = "OUI" (or not specified),
             /GROUP_MA = grma,
           ◆ SIGMA = float,
           ◆ EPSILON = float,
           ◆ TEMP_EXT = float,
        ),
      | MAIL_LINK = _F (
           ◇ GROUP_MA_MAIT = Grma,
           ◆ | GROUP_MA_ESCL = grma,
             | GROUP_NO_ESCL = grno,
           ◇ TRAN = float,
           ◇ ANGL_NAUT = float,
           ◇ CENTRE = float,
           ◇ ELIM_MULT =/"OUI" (by default),
                         /"NON ",
           ◇ DISTANCE_MAX = float,
           ◇ DISTANCE_ALARME = float,
        ),
      | CONVECTION = _F (
           ◆ VITESSE = cham_no,
        ),
    ◇ INFO =/1 (by default),
             /2,
)

◆: mandatory
◇: optional
: present by default
&: together
/: only one among
|: several possible choices