Syntax
=====

.. code-block:: text

    mesh = CREA_MAILLAGE (
        ◇ MAILLAGE = mesh,
          /GEOM_FIBRE = fiber,
        ◆/COQU_VOLU = _F (
               ◆ NOM = text,
               ◆ GROUP_MA = GRMA,
               ◆ EPAIS = float,
               ◇ PREF_MAILLE = text (default: "V"),
               ◇ PREF_NOEUD = text (default: "NS"),
               ◇ PREF_NUME = int (default: 1),
               ◆ PLAN =/"SUP ",
                        /"MOY ",
                        /"INF ",
               # If: equal_to (" PLAN ", 'MOY')
                   ◆ TRANSLATION =/"SUP ",
                                   /"INF ",
            ),
          /CREA_FISS = _F (
               ◆ NOM = text,
               ◆ GROUP_NO_1 = grno,
               ◆ GROUP_NO_2 = grno,
               ◇ PREF_MAILLE = text (default: "MS"),
               ◇ PREF_NUME = int (default: 1),
            ),
          /CREA_MAILLE = _F (
               ◆ NOM = text,
               ◆/TOUT = "OUI" (or not specified),
                 /GROUP_MA = grma,
               ◇ PREF_MAILLE = text (default: "E"),
               ◇ PREF_NUME = int,
            ),
          /CREA_POI1 = _F (
               ◇ NOM_GROUP_MA = Grma,
               ◆ | ALL = "YES" (or not specified),
                 | GROUP_MA = grma,
                 | GROUP_NO = group,
            ),
          /ECLA_PG = _F (
               ◆ MODELE = model,
               ◇ TOUT = "OUI" (or not specified),
               ◇ GROUP_MA = Grma,
               ◇ SHRINK = float (default: 0.9),
               ◇ TAILLE_MIN = float,
               ◆ NOM_CHAM =/"DEGE_ELGA ",
                            /"DEPL_ELGA ",
                            /"DERA_ELGA ",
                            /"DISS_ELGA ",
                            /"EFGE_ELGA ",
                            /"ENDO_ELGA ",
                            /"ENEL_ELGA ",
                            /"EPEQ_ELGA ",
                            /"EPFD_ELGA ",
                            /"EPFP_ELGA ",
                            /"EPGQ_ELGA ",
                            /"EPME_ELGA ",
                            /"EPMG_ELGA ",
                            /"EPMQ_ELGA ",
                            /"EPSG_ELGA ",
                            /"EPSI_ELGA ",
                            /"EPSL_ELGA ",
                            /"EPSP_ELGA ",
                            /"EPVC_ELGA ",
                            /"ETOT_ELGA ",
                            /"FLHN_ELGA ",
                            /"FLUX_ELGA ",
                            /"HYDR_ELGA ",
                            /"INDL_ELGA ",
                            /"MATE_ELGA ",
                            /"PDIL_ELGA ",
                            /"SIEF_ELGA ",
                            /"SIEQ_ELGA ",
                            /"SIGM_ELGA ",
                            /"SIMY_ELGA ",
                            /"SOUR_ELGA ",
                            /"STRX_ELGA ",
                            /"TEMP_ELGA ",
                            /"UT01_ELGA ",
                            /"UT02_ELGA ",
                            /"UT03_ELGA ",
                            /"UT04_ELGA ",
                            /"UT05_ELGA ",
                            /"UT06_ELGA ",
                            /"UT07_ELGA ",
                            /"UT08_ELGA ",
                            /"UT09_ELGA ",
                            /"UT10_ELGA ",
                            /"VARC_ELGA ",
                            /"VARI_ELGA ",
            ),
          /HEXA20_27 = _F (
               ◆/TOUT = "OUI" (or not specified),
                 /GROUP_MA = grma,
               ◇ PREF_NOEUD = text (default: "NS"),
               ◇ PREF_NUME = int (default: 1),
            ),
          /LINE_QUAD = _F (
               ◆/TOUT = "OUI" (or not specified),
                 /GROUP_MA = grma,
               ◇ PREF_NOEUD = text (default: "NS"),
               ◇ PREF_NUME = int (default: 1),
            ),
          /MODI_MAILLE = _F (
               ◆ | ALL = "YES" (or not specified),
                 | GROUP_MA = grma,
               ◆ OPTION =/"TRIA6_7 ",
                          /"QUAD8_9 ",
                          /"SEG3_4 ",
                          /"QUAD_TRIA3 ",
               # If: equal_to (" OPTION ", 'TRIA6_7', '') or equal_to (" OPTION ", 'QUAD8_9') or equal_to (" OPTION ", '', 'SEG3_4')
                   ◇ PREF_NOEUD = text (default: "NS"),
                   ◇ PREF_NUME = int (default: 1),
               # If: equal_to (" OPTION ", 'QUAD_TRIA3')
                   ◇ PREF_MAILLE = text (default: "MS"),
                   ◇ PREF_NUME = int (default: 1),
            ),
          /QUAD_LINE = _F (
               ◆/TOUT = "OUI" (or not specified),
                 /GROUP_MA = grma,
            ),
          /REPERE = _F (
               ◆ TABLE = table,
               ◇ NOM_ORIG =/"CDG ",
                            /"TORSION ",
               ◇ NOM_ROTA = "INERTIE" (or not specified),
               # If: equal_to (" NOM_ORIG ", 'CDG')
                   ◇ GROUP_MA = Grma,
            ),
          /RESTREINT = _F (
               ◆ GROUP_MA = Grma,
               ◇ TOUT_GROUP_MA =/"OUI ",
                                 /"NON" (by default),
               ◇ GROUP_NO = big,
               ◇ TOUT_GROUP_NO =/"OUI ",
                                 /"NON" (by default),
            ),
          /PENTA15_18 = _F (
               ◆/TOUT = "OUI" (or not specified),
                 /GROUP_MA = grma,
               ◇ PREF_NOEUD = text (default: "NS"),
               ◇ PREF_NUME = int (default: 1),
            ),
          /DECOUPE_LAC = _F (
               ◆ | GROUP_MA_ESCL = grma,
               ◇ DECOUPE_HEXA =/"PYRA" (by default),
                                /"HEXA ",
            ),
          /MODI_HHO = _F (
               ◇ TOUT = "OUI" (or not specified),
               ◇ PREF_NOEUD = text (default: "NH"),
            ),
          /COQUE_SOLIDE = _F (
               ◆ GROUP_MA = Grma,
               ◇ PREF_NOEUD = text (default: "NS"),
               ◇ PREF_NUME = int (default: 1),
               ◇ GROUP_MA_SURF = Grma,
            ),
          /RAFFINEMENT = _F (
               ◇ TOUT = "OUI ",
               ◇ NIVEAU = int (default: 1),
            ),
        ◇ TITRE = text,
        ◇ INFO =/1 (by default),
                 /2,
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices