2. Syntax

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