.. code-block:: text

    char_meca = AFFE_CHAR_MECA(
        ◇ VERI_AFFE = / "NON",
                      / "OUI" (par défaut),
        ◇ VERI_NORM = / "NON",
                      / "OUI" (par défaut),
        ◆ MODELE = modele,
        ◇ CARA_ELEM = cara_elem,
        ◇ CHAM_MATER = cham_mater,
          | EVOL_CHAR = evol_char,
        ◆ | PESANTEUR = _F(
               ◇ GROUP_MA = list[grma],
               ◆ GRAVITE = float,
               ◆ DIRECTION = list[float],
            ),
          | ROTATION = _F(
               ◇ GROUP_MA = list[grma],
               ◇ SANS_GROUP_MA = list[grma],
               ◆ VITESSE = float,
               ◆ AXE = list[float],
               ◇ CENTRE = list[float],
            ),
          | DDL_IMPO = _F(
               ◆ | TOUT = "OUI" (ou non renseigné),
                 | GROUP_MA = list[grma],
                 | GROUP_NO = list[grno],
               ◇ SANS_GROUP_MA = list[grma],
               ◇ SANS_GROUP_NO = list[grno],
               ◆ | BLOCAGE = / "DEPLACEMENT",
                             / "ROTATION",
                             / "TUYAU_FOURIER",
                 | DX = float,
                 | DY = float,
                 | DZ = float,
                 | DRX = float,
                 | DRY = float,
                 | DRZ = float,
                 | GRX = float,
                 | PRES = float,
                 | PSI = float,
                 | PHI = float,
                 | DRGX = float,
                 | DRGY = float,
                 | DRGZ = float,
                 | TEMP = float,
                 | PRE1 = float,
                 | PRE2 = float,
                 | UI2 = float,
                 | UI3 = float,
                 | VI2 = float,
                 | VI3 = float,
                 | WI2 = float,
                 | WI3 = float,
                 | UO2 = float,
                 | UO3 = float,
                 | VO2 = float,
                 | VO3 = float,
                 | WO2 = float,
                 | WO3 = float,
                 | UI4 = float,
                 | UI5 = float,
                 | VI4 = float,
                 | VI5 = float,
                 | WI4 = float,
                 | WI5 = float,
                 | UO4 = float,
                 | UO5 = float,
                 | VO4 = float,
                 | VO5 = float,
                 | WO4 = float,
                 | WO5 = float,
                 | UI6 = float,
                 | UO6 = float,
                 | VI6 = float,
                 | VO6 = float,
                 | WI6 = float,
                 | WO6 = float,
                 | WO = float,
                 | WI1 = float,
                 | WO1 = float,
                 | GONF = float,
                 | H1X = float,
                 | H1Y = float,
                 | H1Z = float,
                 | H1PRE1 = float,
                 | H2X = float,
                 | H2Y = float,
                 | H2Z = float,
                 | H2PRE1 = float,
                 | H3X = float,
                 | H3Y = float,
                 | H3Z = float,
                 | H3PRE1 = float,
                 | H4X = float,
                 | H4Y = float,
                 | H4Z = float,
                 | K1 = float,
                 | K2 = float,
                 | K3 = float,
                 | PRE_FLU = float,
                 | LAG_FLI = float,
                 | LAG_FLS = float,
                 | LAGS_C = float,
                 | LAGS_F1 = float,
                 | LAGS_F2 = float,
                 | PR2_FLU = float,
                 | LA2_FLI = float,
                 | LA2_FLS = float,
                 | LAG2_C = float,
                 | LAG2_F1 = float,
                 | LAG2_F2 = float,
                 | PR3_FLU = float,
                 | LA3_FLI = float,
                 | LA3_FLS = float,
                 | LAG3_C = float,
                 | LAG3_F1 = float,
                 | LAG3_F2 = float,
                 | LAG4_C = float,
                 | LAG4_F1 = float,
                 | LAG4_F2 = float,
                 | V11 = float,
                 | V12 = float,
                 | V13 = float,
                 | V21 = float,
                 | V22 = float,
                 | V23 = float,
                 | V31 = float,
                 | V32 = float,
                 | V33 = float,
                 | PRES11 = float,
                 | PRES12 = float,
                 | PRES13 = float,
                 | PRES21 = float,
                 | PRES22 = float,
                 | PRES23 = float,
                 | PRES31 = float,
                 | PRES32 = float,
                 | PRES33 = float,
                 | LH1 = float,
                 | GLIS = float,
            ),
          | DDL_POUTRE = _F(
               ◆ | TOUT = "OUI" (ou non renseigné),
                 | GROUP_MA = list[grma],
                 | GROUP_NO = list[grno],
               ◇ SANS_GROUP_MA = list[grma],
               ◇ SANS_GROUP_NO = list[grno],
               ◆ | DX = float,
                 | DY = float,
                 | DZ = float,
                 | DRX = float,
                 | DRY = float,
                 | DRZ = float,
               ◆ / VECT_Y = list[float],
                 / ANGL_VRIL = float,
               ◇ GROUP_MA_REPE = grma,
            ),
          | FACE_IMPO = _F(
               ◇ GROUP_MA = list[grma],
               ◇ SANS_GROUP_MA = list[grma],
               ◇ SANS_GROUP_NO = list[grno],
               ◆ | DX = float,
                 | DY = float,
                 | DZ = float,
                 | DRX = float,
                 | DRY = float,
                 | DRZ = float,
                 | GRX = float,
                 | PRES = float,
                 | PHI = float,
                 | TEMP = float,
                 | PRE1 = float,
                 | PRE2 = float,
                 | DNOR = float,
                 | DRNOR = float,
                 | DTAN = float,
            ),
          | CHAMNO_IMPO = _F(
               ◆ CHAM_NO = cham_no,
               ◆ COEF_IMPO = float,
            ),
          | ARETE_IMPO = _F(
               ◇ GROUP_MA = list[grma],
               ◇ SANS_GROUP_MA = list[grma],
               ◇ SANS_GROUP_NO = list[grno],
               ◆ | DX = float,
                 | DY = float,
                 | DZ = float,
                 | DTAN = float,
                 | PRES = float,
                 | PHI = float,
                 | TEMP = float,
                 | PRE1 = float,
                 | PRE2 = float,
            ),
          | LIAISON_DDL = _F(
               ◆ / GROUP_NO = list[grno],
               ◆ DDL = / "DRGX",
                       / "DRGY",
                       / "DRGZ",
                       / "DRX",
                       / "DRY",
                       / "DRZ",
                       / "DX",
                       / "DY",
                       / "DZ",
                       / "GLIS",
                       / "GONF",
                       / "GRX",
                       / "H1PRE1",
                       / "H1X",
                       / "H1Y",
                       / "H1Z",
                       / "K1",
                       / "K2",
                       / "K3",
                       / "LH1",
                       / "PHI",
                       / "PRE1",
                       / "PRE2",
                       / "PRES",
                       / "PRES11",
                       / "PRES12",
                       / "PRES13",
                       / "PRES21",
                       / "PRES22",
                       / "PRES23",
                       / "PRES31",
                       / "PRES32",
                       / "PRES33",
                       / "PSI",
                       / "TEMP",
                       / "UI2",
                       / "UI3",
                       / "UI4",
                       / "UI5",
                       / "UI6",
                       / "UO2",
                       / "UO3",
                       / "UO4",
                       / "UO5",
                       / "UO6",
                       / "V11",
                       / "V12",
                       / "V13",
                       / "V21",
                       / "V22",
                       / "V23",
                       / "V31",
                       / "V32",
                       / "V33",
                       / "VI2",
                       / "VI3",
                       / "VI4",
                       / "VI5",
                       / "VI6",
                       / "VO2",
                       / "VO3",
                       / "VO4",
                       / "VO5",
                       / "VO6",
                       / "WI1",
                       / "WI2",
                       / "WI3",
                       / "WI4",
                       / "WI5",
                       / "WI6",
                       / "WO",
                       / "WO1",
                       / "WO2",
                       / "WO3",
                       / "WO4",
                       / "WO5",
                       / "WO6",
               ◆ COEF_MULT = list[float],
               ◆ COEF_IMPO = float,
            ),
          | LIAISON_OBLIQUE = _F(
               ◆ | GROUP_NO = list[grno],
                 | GROUP_MA = list[grma],
               ◇ SANS_GROUP_MA = list[grma],
               ◇ SANS_GROUP_NO = list[grno],
               ◆ ANGL_NAUT = list[float],
               ◆ | DX = float,
                 | DY = float,
                 | DZ = float,
                 | DRX = float,
                 | DRY = float,
                 | DRZ = float,
            ),
          | LIAISON_GROUP = _F(
               ◆ / GROUP_MA_1 = list[grma],
                 / GROUP_NO_1 = list[grno],
               ◆ / GROUP_NO_2 = list[grno],
                 / GROUP_MA_2 = list[grma],
               ◇ SANS_GROUP_NO = list[grno],
               ◆ DDL_1 = / "DNOR",
                         / "DRGX",
                         / "DRGY",
                         / "DRGZ",
                         / "DRX",
                         / "DRY",
                         / "DRZ",
                         / "DX",
                         / "DY",
                         / "DZ",
                         / "GLIS",
                         / "GONF",
                         / "GRX",
                         / "H1PRE1",
                         / "H1X",
                         / "H1Y",
                         / "H1Z",
                         / "K1",
                         / "K2",
                         / "K3",
                         / "LH1",
                         / "PHI",
                         / "PRE1",
                         / "PRE2",
                         / "PRES",
                         / "PRES11",
                         / "PRES12",
                         / "PRES13",
                         / "PRES21",
                         / "PRES22",
                         / "PRES23",
                         / "PRES31",
                         / "PRES32",
                         / "PRES33",
                         / "PSI",
                         / "TEMP",
                         / "UI2",
                         / "UI3",
                         / "UI4",
                         / "UI5",
                         / "UI6",
                         / "UO2",
                         / "UO3",
                         / "UO4",
                         / "UO5",
                         / "UO6",
                         / "V11",
                         / "V12",
                         / "V13",
                         / "V21",
                         / "V22",
                         / "V23",
                         / "V31",
                         / "V32",
                         / "V33",
                         / "VI2",
                         / "VI3",
                         / "VI4",
                         / "VI5",
                         / "VI6",
                         / "VO2",
                         / "VO3",
                         / "VO4",
                         / "VO5",
                         / "VO6",
                         / "WI1",
                         / "WI2",
                         / "WI3",
                         / "WI4",
                         / "WI5",
                         / "WI6",
                         / "WO",
                         / "WO1",
                         / "WO2",
                         / "WO3",
                         / "WO4",
                         / "WO5",
                         / "WO6",
               ◆ COEF_MULT_1 = list[float],
               ◆ DDL_2 = / "DNOR",
                         / "DRGX",
                         / "DRGY",
                         / "DRGZ",
                         / "DRX",
                         / "DRY",
                         / "DRZ",
                         / "DX",
                         / "DY",
                         / "DZ",
                         / "GLIS",
                         / "GONF",
                         / "GRX",
                         / "H1PRE1",
                         / "H1X",
                         / "H1Y",
                         / "H1Z",
                         / "K1",
                         / "K2",
                         / "K3",
                         / "LH1",
                         / "PHI",
                         / "PRE1",
                         / "PRE2",
                         / "PRES",
                         / "PRES11",
                         / "PRES12",
                         / "PRES13",
                         / "PRES21",
                         / "PRES22",
                         / "PRES23",
                         / "PRES31",
                         / "PRES32",
                         / "PRES33",
                         / "PSI",
                         / "TEMP",
                         / "UI2",
                         / "UI3",
                         / "UI4",
                         / "UI5",
                         / "UI6",
                         / "UO2",
                         / "UO3",
                         / "UO4",
                         / "UO5",
                         / "UO6",
                         / "V11",
                         / "V12",
                         / "V13",
                         / "V21",
                         / "V22",
                         / "V23",
                         / "V31",
                         / "V32",
                         / "V33",
                         / "VI2",
                         / "VI3",
                         / "VI4",
                         / "VI5",
                         / "VI6",
                         / "VO2",
                         / "VO3",
                         / "VO4",
                         / "VO5",
                         / "VO6",
                         / "WI1",
                         / "WI2",
                         / "WI3",
                         / "WI4",
                         / "WI5",
                         / "WI6",
                         / "WO",
                         / "WO1",
                         / "WO2",
                         / "WO3",
                         / "WO4",
                         / "WO5",
                         / "WO6",
               ◆ COEF_MULT_2 = list[float],
               ◆ COEF_IMPO = float,
               ◇ TRAN = list[float],
               ◇ ANGL_NAUT = list[float],
               ◇ CENTRE = list[float],
            ),
          | LIAISON_MAIL = _F(
               ◇ GROUP_MA_MAIT = list[grma],
               ◆ | GROUP_MA_ESCL = list[grma],
                 | GROUP_NO_ESCL = list[grno],
               ◇ DISTANCE_MAX = float,
               ◇ DISTANCE_ALARME = float,
               ◇ TYPE_RACCORD = / "COQUE",
                                / "COQUE_MASSIF",
                                / "MASSIF" (par défaut),
                                / "MASSIF_COQUE",
               # Si: equal_to("TYPE_RACCORD", 'COQUE')
                   ◇ TRANSF_GEOM_MAIT = list[fonction / formule / nappe],
                   ◇ TRANSF_GEOM_ESCL = list[fonction / formule / nappe],
                   ◇ DDL = / "DRX",
                           / "DRY",
                           / "DRZ",
                           / "DX",
                           / "DY",
                           / "DZ",
               # Si: equal_to("TYPE_RACCORD", 'MASSIF')
                   ◇ TRAN = list[float],
                   ◇ ANGL_NAUT = list[float],
                   ◇ CENTRE = list[float],
                   ◇ DDL = / "DNOR",
                           / "DRGX",
                           / "DRGY",
                           / "DRGZ",
                           / "DRX",
                           / "DRY",
                           / "DRZ",
                           / "DX",
                           / "DY",
                           / "DZ",
                           / "GLIS",
                           / "GONF",
                           / "GRX",
                           / "H1PRE1",
                           / "H1X",
                           / "H1Y",
                           / "H1Z",
                           / "K1",
                           / "K2",
                           / "K3",
                           / "LH1",
                           / "PHI",
                           / "PRE1",
                           / "PRE2",
                           / "PRES",
                           / "PRES11",
                           / "PRES12",
                           / "PRES13",
                           / "PRES21",
                           / "PRES22",
                           / "PRES23",
                           / "PRES31",
                           / "PRES32",
                           / "PRES33",
                           / "PSI",
                           / "TEMP",
                           / "UI2",
                           / "UI3",
                           / "UI4",
                           / "UI5",
                           / "UI6",
                           / "UO2",
                           / "UO3",
                           / "UO4",
                           / "UO5",
                           / "UO6",
                           / "V11",
                           / "V12",
                           / "V13",
                           / "V21",
                           / "V22",
                           / "V23",
                           / "V31",
                           / "V32",
                           / "V33",
                           / "VI2",
                           / "VI3",
                           / "VI4",
                           / "VI5",
                           / "VI6",
                           / "VO2",
                           / "VO3",
                           / "VO4",
                           / "VO5",
                           / "VO6",
                           / "WI1",
                           / "WI2",
                           / "WI3",
                           / "WI4",
                           / "WI5",
                           / "WI6",
                           / "WO",
                           / "WO1",
                           / "WO2",
                           / "WO3",
                           / "WO4",
                           / "WO5",
                           / "WO6",
               # Si: equal_to("TYPE_RACCORD", 'COQUE_MASSIF')
                   ◆ EPAIS = float,
                   ◆ CHAM_NORMALE = cham_no,
               ◇ ELIM_MULT = / "NON",
                             / "OUI" (par défaut),
            ),
          | LIAISON_CYCL = _F(
               ◇ GROUP_MA_MAIT1 = list[grma],
               ◇ GROUP_MA_MAIT2 = list[grma],
               ◆ | GROUP_MA_ESCL = list[grma],
                 | GROUP_NO_ESCL = list[grno],
               ◇ TRAN = list[float],
               ◇ ANGL_NAUT = list[float],
               ◇ CENTRE = list[float],
               ◇ COEF_MAIT1 = float,
               ◇ COEF_MAIT2 = float,
               ◇ COEF_ESCL = float,
               ◇ & DDL_MAIT = "DNOR" (ou non renseigné),
                 & DDL_ESCL = "DNOR" (ou non renseigné),
            ),
          | LIAISON_SOLIDE = _F(
               ◆ / GROUP_NO = list[grno],
                 / GROUP_MA = list[grma],
               ◇ SANS_GROUP_MA = list[grma],
               ◇ SANS_GROUP_NO = list[grno],
               ◇ DIST_MIN = float,
            ),
          | LIAISON_ELEM = _F(
               ◆ OPTION = / "2D_POU",
                          / "3D_POU",
                          / "3D_POU_ARLEQUIN",
                          / "3D_TUYAU",
                          / "COQ_3D",
                          / "COQ_POU",
                          / "COQ_TUYAU",
                          / "PLAQ_POUT_ORTH",
               # Si: equal_to("OPTION", '3D_POU')
                   ◇ GROUP_MA_1 = list[grma],
                   ◆ / GROUP_NO_2 = grno,
                     / GROUP_MA_2 = grma,
                   ◇ ANGL_MAX = float (défaut: 1.0),
               # Si: equal_to("OPTION", 'COQ_3D')
                   ◆ GROUP_MA_COQUE = grma,
                   ◆ GROUP_MA_MASSIF = grma,
                   ◆ CARA_ELEM = cara_elem,
                   ◇ COEF_RIGI_DRZ = float (défaut: 1e-05),
               # Si: equal_to("OPTION", '3D_POU_ARLEQUIN')
                   ◇ GROUP_MA_1 = list[grma],
                   ◇ GROUP_MA_2 = list[grma],
                   ◆ CARA_ELEM = cara_elem,
                   ◆ CHAM_MATER = cham_mater,
               # Si: equal_to("OPTION", '2D_POU')
                   ◇ GROUP_MA_1 = list[grma],
                   ◆ / GROUP_NO_2 = grno,
                     / GROUP_MA_2 = grma,
               # Si: equal_to("OPTION", 'COQ_POU') or equal_to("OPTION", 'COQ_TUYAU')
                   ◇ GROUP_MA_1 = list[grma],
                   ◇ GROUP_NO_2 = grno,
                   ◆ CARA_ELEM = cara_elem,
                   ◆ AXE_POUTRE = list[float],
               # Si: equal_to("OPTION", '3D_TUYAU')
                   ◇ GROUP_MA_1 = list[grma],
                   ◇ GROUP_NO_2 = grno,
                   ◆ CARA_ELEM = cara_elem,
                   ◆ AXE_POUTRE = list[float],
                   ◇ ANGL_MAX = float (défaut: 1.0),
               # Si: equal_to("OPTION", 'PLAQ_POUT_ORTH')
                   ◇ GROUP_MA_1 = list[grma],
                   ◇ GROUP_NO_2 = grno,
                   ◇ ANGL_MAX = float (défaut: 1.0),
                   ◇ VERIF_EXCENT = / "NON",
                                    / "OUI" (par défaut),
            ),
          | LIAISON_UNIF = _F(
               ◆ / GROUP_NO = list[grno],
                 / GROUP_MA = list[grma],
               ◇ SANS_GROUP_MA = list[grma],
               ◇ SANS_GROUP_NO = list[grno],
               ◆ DDL = / "DRGX",
                       / "DRGY",
                       / "DRGZ",
                       / "DRX",
                       / "DRY",
                       / "DRZ",
                       / "DX",
                       / "DY",
                       / "DZ",
                       / "GLIS",
                       / "GONF",
                       / "GRX",
                       / "H1PRE1",
                       / "H1X",
                       / "H1Y",
                       / "H1Z",
                       / "K1",
                       / "K2",
                       / "K3",
                       / "LH1",
                       / "PHI",
                       / "PRE1",
                       / "PRE2",
                       / "PRES",
                       / "PRES11",
                       / "PRES12",
                       / "PRES13",
                       / "PRES21",
                       / "PRES22",
                       / "PRES23",
                       / "PRES31",
                       / "PRES32",
                       / "PRES33",
                       / "PSI",
                       / "TEMP",
                       / "UI2",
                       / "UI3",
                       / "UI4",
                       / "UI5",
                       / "UI6",
                       / "UO2",
                       / "UO3",
                       / "UO4",
                       / "UO5",
                       / "UO6",
                       / "V11",
                       / "V12",
                       / "V13",
                       / "V21",
                       / "V22",
                       / "V23",
                       / "V31",
                       / "V32",
                       / "V33",
                       / "VI2",
                       / "VI3",
                       / "VI4",
                       / "VI5",
                       / "VI6",
                       / "VO2",
                       / "VO3",
                       / "VO4",
                       / "VO5",
                       / "VO6",
                       / "WI1",
                       / "WI2",
                       / "WI3",
                       / "WI4",
                       / "WI5",
                       / "WI6",
                       / "WO",
                       / "WO1",
                       / "WO2",
                       / "WO3",
                       / "WO4",
                       / "WO5",
                       / "WO6",
            ),
          | LIAISON_CHAMNO = _F(
               ◆ CHAM_NO = cham_no,
               ◆ COEF_IMPO = float,
            ),
          | LIAISON_RBE3 = _F(
               ◇ GROUP_NO_MAIT = grno,
               ◆ DDL_MAIT = / "DRX",
                            / "DRY",
                            / "DRZ",
                            / "DX",
                            / "DY",
                            / "DZ",
               ◇ GROUP_NO_ESCL = list[grno],
               ◆ DDL_ESCL = list[text],
               ◇ COEF_ESCL = list[float] (défaut: 1.0),
            ),
          | LIAISON_INTERF = _F(
               ◆ MACR_ELEM_DYNA = macr_elem_dyna,
               ◇ TYPE_LIAISON = / "RIGIDE" (par défaut),
                                / "SOUPLE",
            ),
          | LIAISON_PROJ = _F(
               ◆ MATR_PROJECTION = corresp_2_mailla,
               ◆ DDL = / "DRGX",
                       / "DRGY",
                       / "DRGZ",
                       / "DRX",
                       / "DRY",
                       / "DRZ",
                       / "DX",
                       / "DY",
                       / "DZ",
                       / "GLIS",
                       / "GONF",
                       / "GRX",
                       / "H1PRE1",
                       / "H1X",
                       / "H1Y",
                       / "H1Z",
                       / "K1",
                       / "K2",
                       / "K3",
                       / "LH1",
                       / "PHI",
                       / "PRE1",
                       / "PRE2",
                       / "PRES",
                       / "PRES11",
                       / "PRES12",
                       / "PRES13",
                       / "PRES21",
                       / "PRES22",
                       / "PRES23",
                       / "PRES31",
                       / "PRES32",
                       / "PRES33",
                       / "PSI",
                       / "TEMP",
                       / "UI2",
                       / "UI3",
                       / "UI4",
                       / "UI5",
                       / "UI6",
                       / "UO2",
                       / "UO3",
                       / "UO4",
                       / "UO5",
                       / "UO6",
                       / "V11",
                       / "V12",
                       / "V13",
                       / "V21",
                       / "V22",
                       / "V23",
                       / "V31",
                       / "V32",
                       / "V33",
                       / "VI2",
                       / "VI3",
                       / "VI4",
                       / "VI5",
                       / "VI6",
                       / "VO2",
                       / "VO3",
                       / "VO4",
                       / "VO5",
                       / "VO6",
                       / "WI1",
                       / "WI2",
                       / "WI3",
                       / "WI4",
                       / "WI5",
                       / "WI6",
                       / "WO",
                       / "WO1",
                       / "WO2",
                       / "WO3",
                       / "WO4",
                       / "WO5",
                       / "WO6",
               ◇ TYPE = / "EXCENTREMENT",
                        / "IDENTITE" (par défaut),
            ),
          | VECT_ASSE = cham_no,
          | FORCE_NODALE = _F(
               ◆ / GROUP_NO = list[grno],
               ◆ | FX = float,
                 | FY = float,
                 | FZ = float,
                 | MX = float,
                 | MY = float,
                 | MZ = float,
               ◇ ANGL_NAUT = list[float],
            ),
          | FORCE_FACE = _F(
               ◇ GROUP_MA = list[grma],
               ◆ | FX = float,
                 | FY = float,
                 | FZ = float,
            ),
          | FORCE_ARETE = _F(
               ◇ GROUP_MA = list[grma],
               ◆ | FX = float,
                 | FY = float,
                 | FZ = float,
                 | MX = float,
                 | MY = float,
                 | MZ = float,
            ),
          | FORCE_CONTOUR = _F(
               ◇ GROUP_MA = list[grma],
               ◆ | FX = float,
                 | FY = float,
                 | FZ = float,
            ),
          | FORCE_INTERNE = _F(
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = list[grma],
               ◆ | FX = float,
                 | FY = float,
                 | FZ = float,
            ),
          | PRE_SIGM = _F(
               ◆ SIGM = carte / cham_elem,
            ),
          | PRES_REP = _F(
               ◆ | TOUT = "OUI" (ou non renseigné),
                 | GROUP_MA = list[grma],
                 | FISSURE = list[fiss_xfem],
               ◆ | PRES = float,
                 | CISA_2D = float,
            ),
          | EFFE_FOND = _F(
               ◆ GROUP_MA_INT = list[grma],
               ◇ GROUP_MA = list[grma],
               ◆ PRES = float,
            ),
          | PRE_EPSI = _F(
               ◆ | TOUT = "OUI" (ou non renseigné),
                 | GROUP_MA = list[grma],
                 | EPSI = carte / cham_elem,
               ◆ | EPXX = float,
                 | EPYY = float,
                 | EPZZ = float,
                 | EPXY = float,
                 | EPXZ = float,
                 | EPYZ = float,
                 | EPX = float,
                 | KY = float,
                 | KZ = float,
                 | EXX = float,
                 | EYY = float,
                 | EXY = float,
                 | KXX = float,
                 | KYY = float,
                 | KXY = float,
                 | VECT_N = list[float],
               # Si: exists("VECT_N")
                   ◆ | KN1 = float,
                     | KN2 = float,
            ),
          | FORCE_POUTRE = _F(
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = list[grma],
               ◇ TYPE_CHARGE = / "FORCE" (par défaut),
                               / "VENT",
               # Si: equal_to("TYPE_CHARGE", 'FORCE')
                   ◆ | FX = float,
                     | FY = float,
                     | FZ = float,
                     | MX = float,
                     | MY = float,
                     | MZ = float,
                     | N = float,
                     | VY = float,
                     | VZ = float,
                     | MT = float,
                     | MFY = float,
                     | MFZ = float,
                     | MGX = float,
                     | MGY = float,
                     | MGZ = float,
               # Si: equal_to("TYPE_CHARGE", 'VENT')
                   ◆ | FX = fonction / formule / nappe,
                     | FY = fonction / formule / nappe,
                     | FZ = fonction / formule / nappe,
                     | N = fonction / formule / nappe,
                     | VY = fonction / formule / nappe,
                     | VZ = fonction / formule / nappe,
            ),
          | FORCE_TUYAU = _F(
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = list[grma],
               ◆ PRES = float,
            ),
          | FORCE_COQUE = _F(
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = list[grma],
               ◆ | FX = float,
                 | FY = float,
                 | FZ = float,
                 | MX = float,
                 | MY = float,
                 | MZ = float,
                 | PRES = float,
                 | F1 = float,
                 | F2 = float,
                 | F3 = float,
                 | MF1 = float,
                 | MF2 = float,
               ◇ PLAN = / "INF",
                        / "MAIL" (par défaut),
                        / "MOY",
                        / "SUP",
            ),
          | FORCE_COQUE_FO = _F(
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = list[grma],
               ◇ PRES = fonction / formule / nappe,
            ),
          | LIAISON_COQUE = _F(
               ◆ | GROUP_MA_1 = list[grma],
                 | GROUP_MA_2 = list[grma],
                 | GROUP_NO_1 = list[grno],
                 | GROUP_NO_2 = list[grno],
               ◇ SANS_GROUP_MA_1 = list[grma],
               ◇ SANS_GROUP_NO_1 = list[grno],
               ◇ SANS_GROUP_MA_2 = list[grma],
               ◇ SANS_GROUP_NO_2 = list[grno],
            ),
          | RELA_CINE_BP = _F(
               ◆ CABLE_BP = cabl_precont,
               ◇ RELA_CINE = / "NON",
                             / "OUI" (par défaut),
               # Si: equal_to("RELA_CINE", 'OUI')
                   ◇ SIGM_BPEL = / "NON" (par défaut),
                                 / "OUI",
               # Si: equal_to("RELA_CINE", 'NON')
                   ◇ SIGM_BPEL = "OUI",
               ◇ TYPE_EPX = / "ADHE" (par défaut),
                            / "FROT",
                            / "GLIS",
               ◇ DIST_MIN = float,
            ),
          | FORCE_ELEC = _F(
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = list[grma],
               ◇ POSITION = / "FINI",
                            / "INFI",
                            / "PARA",
               # Si: not exists("POSITION")
                   ◇ FX = float (défaut: 0.0),
                   ◇ FY = float (défaut: 0.0),
                   ◇ FZ = float (défaut: 0.0),
               # Si: equal_to("POSITION", 'PARA')
                   ◆ / TRANS = list[float],
                     / DIST = float,
                   # Si: exists("DIST")
                       ◆ POINT2 = list[float],
               # Si: (equal_to("POSITION", 'FINI')) or (equal_to("POSITION", 'INFI'))
                   ◆ POINT1 = list[float],
                   ◆ POINT2 = list[float],
            ),
          | VITE_FACE = _F(
               ◇ GROUP_MA = list[grma],
               ◆ / VNOR = float,
                 / DIRECTION = list[float],
               # Si: exists("DIRECTION")
                   ◆ VITE = float,
            ),
          | ONDE_FLUI = _F(
               ◇ GROUP_MA = list[grma],
               ◆ PRES = float,
            ),
          | FLUX_THM_REP = _F(
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = list[grma],
               ◆ | FLUN = float,
                 | FLUN_HYDR1 = float,
                 | FLUN_HYDR2 = float,
            ),
          | FORCE_SOL = _F(
               ◆ / GROUP_NO_INTERF = grno,
                 / SUPER_MAILLE = ma,
               ◆ | UNITE_RESU_MASS = unit,
                 | UNITE_RESU_RIGI = unit,
                 | UNITE_RESU_AMOR = unit,
               ◇ UNITE_RESU_FORC = unit,
               ◇ NB_PAS_TRONCATURE = int (défaut: 0),
               ◇ TYPE = / "ASCII" (par défaut),
                        / "BINAIRE",
            ),
          | ECHANGE_THM = _F(
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = list[grma],
               ◆ | COEF_11 = float,
                 | COEF_12 = float,
                 | COEF_21 = float,
                 | COEF_22 = float,
               ◇ PRE1_EXT = float,
               ◇ PRE2_EXT = float,
            ),
          | ECHANGE_THM_HR = _F(
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = list[grma],
               ◆ HR_EXT = float,
               ◆ ALPHA = float,
               ◆ PVAP_SAT = float,
            ),
        ◇ DOUBLE_LAGRANGE = / "NON",
                            / "OUI" (par défaut),
        ◇ INFO = / 1 (par défaut),
                 / 2,
    )
    
    ◆ : obligatoire
    ◇ : optionnel
    ⟐ : présent par défaut
    & : ensemble
    / : un seul parmi
    | : plusieurs choix possibles