Syntaxe
=======
               

.. code-block:: text

    / grille
    / maillage
    / squelette = DEFI_GROUP(
        ◆ reuse = <objet de MAILLAGE ou GRILLE>,
        ◆ / MAILLAGE = maillage / squelette,
          / GRILLE = grille,
        ◆ | DETR_GROUP_MA = _F(
               ◆ NOM = text,
            ),
          | CREA_GROUP_MA = _F(
               ◆ NOM = text,
               ◆ / TOUT = "OUI" (ou non renseigné),
                 / GROUP_MA = grma,
                 / INTERSEC = grma,
                 / UNION = grma,
                 / DIFFE = grma,
                 / OPTION = / "APPUI",
                            / "BANDE",
                            / "CYLINDRE",
                            / "FACE_NORMALE",
                            / "FISS_XFEM",
                            / "SPHERE",
               ◇ TYPE_MAILLE = / "1D",
                               / "2D",
                               / "3D",
                               / "HEXA20",
                               / "HEXA27",
                               / "HEXA8",
                               / "PENTA15",
                               / "PENTA18",
                               / "PENTA6",
                               / "POI1",
                               / "PYRAM13",
                               / "PYRAM5",
                               / "QUAD4",
                               / "QUAD8",
                               / "QUAD9",
                               / "SEG2",
                               / "SEG3",
                               / "SEG4",
                               / "TETRA10",
                               / "TETRA4",
                               / "TOUT" (par défaut),
                               / "TRIA3",
                               / "TRIA6",
                               / "TRIA7",
               # Si: exists("GROUP_MA")
                   ◇ / NUME_INIT = int,
                     / POSITION = / "FIN",
                                  / "INIT",
                                  / "MILIEU",
                   # Si: exists("NUME_INIT")
                       ◇ NUME_FIN = int,
               # Si: equal_to("OPTION", 'FACE_NORMALE')
                   ◆ / ANGL_NAUT = float,
                     / VECT_NORMALE = float,
                   ◇ ANGL_PREC = float (défaut: 0.5),
                   ◇ VERI_SIGNE = / "NON",
                                  / "OUI" (par défaut),
               # Si: equal_to("OPTION", 'SPHERE')
                   ◆ / POINT = float,
                     / GROUP_NO_CENTRE = grno,
                   ◆ RAYON = float,
                   ◇ CRIT_NOEUD = / "AU_MOINS_UN" (par défaut),
                                  / "MAJORITE",
                                  / "TOUS",
               # Si: equal_to("OPTION", 'CYLINDRE')
                   ◆ / POINT = float,
                     / GROUP_NO_CENTRE = grno,
                   ◆ RAYON = float,
                   ◆ / ANGL_NAUT = float,
                     / VECT_NORMALE = float,
                   ◇ CRIT_NOEUD = / "AU_MOINS_UN" (par défaut),
                                  / "MAJORITE",
                                  / "TOUS",
               # Si: equal_to("OPTION", 'BANDE')
                   ◆ / POINT = float,
                     / GROUP_NO_CENTRE = grno,
                   ◆ DIST = float,
                   ◆ / ANGL_NAUT = float,
                     / VECT_NORMALE = float,
                   ◇ CRIT_NOEUD = / "AU_MOINS_UN" (par défaut),
                                  / "MAJORITE",
                                  / "TOUS",
               # Si: equal_to("OPTION", 'APPUI')
                   ◆ / GROUP_NO = grno,
                   ◆ TYPE_APPUI = / "AU_MOINS_UN",
                                  / "MAJORITE",
                                  / "SOMMET",
                                  / "TOUT",
               # Si: equal_to("OPTION", 'FISS_XFEM')
                   ◇ TYPE_GROUP = / "CRACKTIP",
                                  / "FISSUREE",
                                  / "HEAVISIDE",
                                  / "MIXTE",
                                  / "XFEM" (par défaut),
                   ◆ FISSURE = fiss_xfem,
            ),
          | CREA_GROUP_NO = _F(
               ◇ OPTION = / "ENV_CYLINDRE",
                          / "ENV_SPHERE",
                          / "FISS_XFEM",
                          / "INCLUSION",
                          / "INTERVALLE_VALE",
                          / "NOEUD_ORDO",
                          / "PLAN",
                          / "RELA_CINE_BP",
                          / "SEGM_DROI_ORDO",
                          / "TUNNEL",
               # Si: not exists("OPTION")
                   ◆ / TOUT_GROUP_MA = "OUI" (ou non renseigné),
                     / GROUP_MA = grma,
                     / GROUP_NO = grno,
                     / INTERSEC = grno,
                     / UNION = grno,
                     / DIFFE = grno,
                   # Si: exists("GROUP_MA")
                       ◇ NOM = text,
                       ◇ CRIT_NOEUD = / "CENTRE",
                                      / "MILIEU",
                                      / "SOMMET",
                                      / "TOUS" (par défaut),
                   # Si: exists("GROUP_NO")
                       ◇ / NUME_INIT = int,
                         / POSITION = / "FIN",
                                      / "INIT",
                                      / "MILIEU",
                       # Si: exists("NUME_INIT")
                           ◇ NUME_FIN = int,
                   # Si: not exists("GROUP_MA") and not exists("TOUT_GROUP_MA")
                       ◆ NOM = text,
               # Si: equal_to("OPTION", 'ENV_SPHERE')
                   ◆ NOM = text,
                   ◆ / POINT = float,
                     / GROUP_NO_CENTRE = grno,
                   ◆ RAYON = float,
                   ◆ PRECISION = float,
               # Si: equal_to("OPTION", 'ENV_CYLINDRE')
                   ◆ NOM = text,
                   ◆ / POINT = float,
                     / GROUP_NO_CENTRE = grno,
                   ◆ RAYON = float,
                   ◆ / ANGL_NAUT = float,
                     / VECT_NORMALE = float,
                   ◆ PRECISION = float,
               # Si: equal_to("OPTION", 'PLAN')
                   ◆ NOM = text,
                   ◆ / POINT = float,
                     / GROUP_NO_CENTRE = grno,
                   ◆ / ANGL_NAUT = float,
                     / VECT_NORMALE = float,
                   ◆ PRECISION = float,
               # Si: equal_to("OPTION", 'SEGM_DROI_ORDO')
                   ◆ NOM = text,
                   ◇ GROUP_NO = grno,
                   ◆ GROUP_NO_ORIG = grno,
                   ◆ GROUP_NO_EXTR = grno,
                   ◆ PRECISION = float,
                   ◆ CRITERE = / "ABSOLU",
                               / "RELATIF",
               # Si: equal_to("OPTION", 'NOEUD_ORDO')
                   ◆ NOM = text,
                   ◆ GROUP_MA = grma,
                   ◇ GROUP_NO_ORIG = grno,
                   ◇ GROUP_NO_EXTR = grno,
                   ◇ VECT_ORIE = float,
                   ◇ ORIGINE = "SANS" (ou non renseigné),
               # Si: equal_to("OPTION", 'TUNNEL')
                   ◆ NOM = text,
                   ◆ | TOUT = "OUI" (ou non renseigné),
                     | GROUP_MA = grma,
                   ◇ GROUP_MA_AXE = grma,
                   ◇ GROUP_NO_ORIG = grno,
                   ◆ RAYON = float,
                   ◇ LONGUEUR = float,
               # Si: equal_to("OPTION", 'INCLUSION')
                   ◆ NOM = text,
                   ◆ CAS_FIGURE = / "2.5D",
                                  / "2D",
                                  / "3D",
                   ◇ DISTANCE_MAX = float,
                   ◆ GROUP_MA = grma,
                   ◆ GROUP_MA_INCL = grma,
                   ◇ MAILLAGE_INCL = maillage,
               # Si: equal_to("OPTION", 'FISS_XFEM')
                   ◆ NOM = text,
                   ◆ TYPE_GROUP = / "CRACKTIP",
                                  / "HEAVISIDE",
                                  / "MIXTE",
                                  / "TORE",
                                  / "XFEM",
                                  / "ZONE_MAJ",
                   ◆ FISSURE = fiss_xfem,
                   # Si: equal_to("TYPE_GROUP", 'TORE')
                       ◆ RAYON_TORE = float,
               # Si: equal_to("OPTION", 'INTERVALLE_VALE')
                   ◆ NOM = text,
                   ◆ CHAM_GD = cham_no,
                   ◆ NOM_CMP = text,
                   ◆ VALE = float,
               # Si: equal_to("OPTION", 'RELA_CINE_BP')
                   ◆ CABLE_BP = cabl_precont,
                   ◇ PREF_GRNO = text (défaut: "RCBP"),
            ),
          | DETR_GROUP_NO = _F(
               ◆ NOM = text,
            ),
        ◇ ALARME = / "NON",
                   / "OUI" (par défaut),
        ◇ INFO = / 1,
                 / 2,
    )
    
    ◆ : obligatoire
    ◇ : optionnel
    ⟐ : présent par défaut
    & : ensemble
    / : un seul parmi
    | : plusieurs choix possibles