Syntax
=====

.. code-block:: text

    /vect_asse_gene
    /matr_asse_gene_r = MACRO_MATR_AJOU (
        ◆ MAILLAGE = mesh,
        ◆ GROUP_MA_FLUIDE = Grma,
        ◆ GROUP_MA_INTERF = Grma,
        ◆ MODELISATION =/"PLAN ",
                         /"AXIS ",
                         /"3D",
        ◆ FLUIDE = _F (
             ◆ RHO = float,
             ◇ TOUT = "OUI" (or not specified),
             ◇ GROUP_MA = Grma,
          ),
        ◆ DDL_IMPO = _F (
             ◆ GROUP_NO = big,
             ◆/PRES_FLUIDE = float,
               /PRES_SORTIE = float,
          ),
        ◇ ECOULEMENT = _F (
             ◆ GROUP_MA_1 = Grma,
             ◆ GROUP_MA_2 = Grma,
             ◆ VNOR_1 = float,
             ◇ VNOR_2 = float,
             ◇ POTENTIEL = evol_ther,
          ),
        ◆ | MODE_MECA = mode_meca,
          | DEPL_IMPO = fiel_no,
          | MODEL_GENE = modele_gene,
        ◇/NUME_DDL_GENE = nume_ddl_gene,
        ◇ DIST_REFE = float (default: 0.01),
        ◆ | MATR_MASS_AJOU = co,
          | MATR_AMOR_AJOU = co,
          | MATR_RIGI_ADD = co,
        ◇/MONO_APPUI = "OUI" (or not specified),
          /MODE_STAT = meca fashion,
        ◇ FORC_AJOU = _F (
             ◆ DIRECTION = float,
             ◇ GROUP_NO = big,
             ◆ VECTEUR = co,
          ),
        SOLVEUR = _F (
             ◇ METHODE =/"MULT_FRONT ",
                         /"LDLT ",
                         /"MUMPS" (by default),
                         /"GCPC ",
                         /"PETSC ",
             # If: equal_to (" METHODE ", 'MULT_FRONT')
                 ◇ RENUM =/"MD",
                           /"MDA" (by default),
                 ◇ NPREC = int (default: 8),
                 ◇ ELIM_LAGR =/"OUI ",
                               /"NON" (by default),
                 ◇ STOP_SINGULIER =/"OUI" (by default),
                                    /"NON ",
             # If: equal_to (" METHODE ", 'LDLT')
                 ◇ RENUM = "RCMK ",
                 ◇ NPREC = int (default: 8),
                 ◇ ELIM_LAGR =/"OUI ",
                               /"NON" (by default),
                 ◇ STOP_SINGULIER =/"OUI" (by default),
                                    /"NON ",
             # If: equal_to (" METHODE ", 'MUMPS')
                 ◇ RENUM =/"AMD ",
                           /"AMF ",
                           /"PORD ",
                           /"METIS ",
                           /"QAMD ",
                           /"SCOTCH ",
                           /"AUTO" (by default),
                           /"PARMETIS ",
                           /"PTSCOTCH ",
                 ◇ NPREC = int (default: 8),
                 ◇ ELIM_LAGR =/"OUI ",
                               /"NON ",
                               /"LAGR2" (by default),
                 ◇ STOP_SINGULIER =/"OUI" (by default),
                                    /"NON ",
                 ◇ TYPE_RESOL =/"NONSYM ",
                                /"SYMGEN ",
                                /"SYMDEF ",
                                /"AUTO" (by default),
                 ◇ ACCELERATION =/"AUTO" (by default),
                                  /"EN",
                                  /"FR+",
                                  /"FR++",
                                  /"LR",
                                  /"LR+",
                                  /"LR++",
                 ◇ LOW_RANK_SEUIL = float,
                 ◇ PRETRAITEMENTS =/"SANS ",
                                    /"AUTO" (by default),
                 ◇ POSTTRAITEMENTS =/"SANS ",
                                     /"AUTO" (by default),
                                     /"FORCE ",
                                     /"MINI ",
                 ◇ PCENT_PIVOT = int (default: 35),
                 ◇ REDUCTION_MPI = int,
                 ◇ NB_RHS = int (default: 1),
                 ◇ RESI_RELA = float (default: 1e-06),
                 ◇ GESTION_MEMOIRE =/"IN_CORE ",
                                     /"OUT_OF_CORE ",
                                     /"AUTO" (by default),
                                     /"EVAL ",
             # If: equal_to (" METHODE ", 'GCPC')
                 ◇ ELIM_LAGR =/"OUI ",
                               /"NON" (by default),
                 ◇ PRE_COND =/"LDLT_INC" (by default),
                              /"LDLT_SP ",
                              /"LDLT_DP ",
                 ◇ RESI_RELA = float (default: 1e-06),
                 ◇ NMAX_ITER = int,
                 # If: equal_to (" PRE_COND ", 'LDLT_INC')
                     ◇ RENUM = "RCMK ",
                     ◇ NIVE_REMPLISSAGE = int,
                 # If: is_in (" PRE_COND ", ('LDLT_SP', 'LDLT_DP'))
                     ◇ RENUM =/"SANS ",
                               /"METIS ",
                               /"PARMETIS" (by default),
                     ◇ REAC_PRECOND = int (default: 30),
                     ◇ PCENT_PIVOT = int (default: 20),
                     ◇ GESTION_MEMOIRE =/"IN_CORE ",
                                         /"AUTO" (by default),
                     ◇ LOW_RANK_SEUIL = float,
             # If: equal_to (" METHODE ", 'PETSC')
                 ◇ ELIM_LAGR =/"OUI ",
                               /"NON" (by default),
                 ◇ ALGORITHME =/"CG",
                                /"CR",
                                /"GMRES ",
                                /"GCR ",
                                /"FGMRES" (by default),
                                /"GMRES_LMP ",
                 ◇ OPTION_PETSC = text,
                 ◇ PRE_COND =/"LDLT_INC ",
                              /"LDLT_SP" (by default),
                              /"LDLT_DP ",
                              /"JACOBI ",
                              /"SOR ",
                              /"ML",
                              /"BOOMER ",
                              /"GAMG ",
                              /"BLOC_LAGR ",
                              /"FIELDSPLIT ",
                              /"UTILISATEUR ",
                              /"HPDDM ",
                              /"SANS ",
                 ◇ RESI_RELA = float (default: 1e-06),
                 ◇ NMAX_ITER = int,
                 # If: equal_to (" PRE_COND ", 'LDLT_INC')
                     ◇ RENUM = "RCMK ",
                     ◇ NIVE_REMPLISSAGE = int,
                     ◇ REMPLISSAGE = float (default: 1.0),
                 # If: is_in (" PRE_COND ", ('LDLT_SP', 'LDLT_DP'))
                     ◇ RENUM =/"SANS ",
                               /"METIS ",
                               /"PARMETIS" (by default),
                     ◇ REAC_PRECOND = int (default: 30),
                     ◇ PCENT_PIVOT = int (default: 20),
                     ◇ GESTION_MEMOIRE =/"IN_CORE ",
                                         /"AUTO" (by default),
                     ◇ LOW_RANK_SEUIL = float,
                 # If: equal_to (" PRE_COND ", 'ML')
                     ◇ RENUM = "SANS ",
                 # If: equal_to (" PRE_COND ", 'BOOMER')
                     ◇ RENUM = "SANS ",
                 # If: equal_to (" PRE_COND ", 'GAMG')
                     ◇ RENUM = "SANS ",
                 # If: equal_to (" PRE_COND ", 'HPDDM')
                     ◇ RENUM = "SANS ",
                 # If: equal_to (" PRE_COND ", 'BLOC_LAGR')
                     ◇ RENUM = "SANS ",
                 # If: is_in (" PRE_COND ", ('FIELDSPLIT'))
                     ◇ RENUM = "SANS ",
                     ◇ PARTITION_CMP = int,
                     ◇ NOM_CMP = text,
                 # If: is_in (" PRE_COND ", ('UTILISATEUR'))
                     ◇ KSP_UTIL = not_checked,
                     ◇ RENUM = "SANS ",
                 # If: is_in (" PRE_COND ", ('JACOBI', '', 'SOR', 'SANS'))
                     ◇ RENUM =/"SANS" (by default),
                               /"RCMK ",
          ),
        ◇ INFO =/1 (by default),
                 /2,
        ◇ NOEUD_DOUBLE =/"OUI ",
                         /"NON" (by default),
        ◇ AVEC_MODE_STAT =/"OUI" (by default),
                           /"NON ",
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices