Syntax
=====

.. code-block:: text

    evol_noli = POST_LIQUEFACTION (
        ◆ AXE =/"X",
                /"Y",
                /"Z",
        ◆ RESULTAT = evol_noli,
        ◆ CRITERE =/"DP_SIGV_REF ",
                    /"DP_SIGM_REF ",
                    /"DP",
                    /"P_ SIGM ",
        # If: equal_to ('CRITERE', 'DP_SIGV_REF')
            ◆ RESU_REF = evol_noli,
            ◆ INST_REF = float,
        # If: equal_to ('CRITERE', 'DP_SIGM_REF')
            ◆ RESU_REF = evol_noli,
            ◆ INST_REF = float,
        # If: equal_to ('CRITERE', 'DP')
            ◆ RESU_REF = evol_noli,
            ◆ INST_REF = float,
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices