Syntax
=====

.. code-block:: text

    matr_asse_gene_c = LIRE_IMPE_MISS (
        ◆ BASE = meca fashion,
        ◆ NUME_DDL_GENE = nume_ddl_gene,
        ◇ FREQ_EXTR = float,
        ◇ INST_EXTR = float,
        ◇ UNITE_RESU_IMPE = unit (default: 30),
        ◇ ISSF =/"NON" (by default),
                 /"OUI ",
        ◇ TYPE =/"BINAIRE ",
                 /"ASCII" (by default),
        ◇ SYME =/"NON" (by default),
                 /"OUI ",
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices