Syntax
=====

.. code-block:: text

    /fiel_no
    /table_container = CALC_G (
        ◆ RESULTAT = evol_noli/dyna_trans/evol_elas/mode_meca,
        # If: is_type (" RESULTAT ") in (evol_elas, evol_noli, dyna_trans,)
            ◇/TOUT_ORDRE = "OUI" (or not specified),
              /NUME_ORDRE = int,
              /LIST_ORDRE = listis,
              /INST = float,
              /LIST_INST = listr8,
            # If: (exists (" INST ")) or (exists (" LIST_INST "))
                ◇ CRITERE =/"RELATIF" (by default),
                            /"ABSOLU ",
                # If: (equal_to (" CRITERE ", 'RELATIF'))
                    ◇ PRECISION = float (default: 1e-06),
                # If: (equal_to (" CRITERE ", 'ABSOLU'))
                    ◆ PRECISION = float,
        # If: is_type (" RESULTAT ") in (mode_meca,)
            ◇/TOUT_MODE = "OUI" (or not specified),
              /NUME_MODE = int,
              /LIST_MODE = listis,
              /FREQ = float,
              /LIST_FREQ = listr8,
            # If: (exists (" FREQ ")) or (exists (" LIST_FREQ "))
                ◇ CRITERE =/"RELATIF" (by default),
                            /"ABSOLU ",
                # If: (equal_to (" CRITERE ", 'RELATIF'))
                    ◇ PRECISION = float (default: 1e-06),
                # If: (equal_to (" CRITERE ", 'ABSOLU'))
                    ◆ PRECISION = float,
        ◆ THETA = _F (
             ◆ FISSURE = bottom_crack,
             ◇ CHAM_THETA = co/cham_no,
             ◇ DISCRETISATION =/"LINEAIRE" (by default),
                                /"LEGENDRE ",
             # If: (equal_to (" DISCRETISATION ", 'LINEAIRE'))
                 ◇ NB_POINT_FOND = int,
             # If: (equal_to (" DISCRETISATION ", 'LEGENDRE'))
                 ◇ DEGRE = int (default: 5),
             # If: ((not exists (" CHAM_THETA "))) or (is_type (" CHAM_THETA ")! = field_no_saster))
                 ◇/R_ INF = float,
                 ◇/R_ SUP = float,
                   /NB_COUCHE_INF = int,
                 ◇/NB_COUCHE_SUP = int,
                 ◇/R_ INF_FO = formula/sheet/function,
                 ◇ & R_ SUP_FO = formula/sheet/function,
          ),
        # If: is_type (" RESULTAT ") in (mode_meca, dyna_trans,)
            ◇ EXCIT = _F (
                 ◆ CHARGE = char_meca/char_cine_meca,
                 ◇ FONC_MULT = formula/tablecloth/function,
              ),
        ◆ OPTION =/"G",
                   /"G_ EPSI ",
                   /"K",
                   /"KJ",
                   /"KJ_EPSI ",
        # If: (not equal_to (" OPTION ", 'G_ EPSI '))
            ◇ ETAT_INIT = _F (
                 ◆ SIGM = cham_elem/cham_no,
              ),
        ◇ TITRE = text,
        ◇ INFO =/1 (by default),
                 /2,
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices