2. Syntax

vect_asse_gene = RECU_GENE (
    ◆ RESU_GENE = tran_gene/harm_gene,
    ◆/INST = float,
      /FREQ = float,
    ◇ NOM_CHAM =/"DEPL" (by default),
                 /"VITE ",
                 /"ACCE ",
    # If: exists (" INST ") and not exists (" FREQ ")
        ◇ INTERPOL =/"NON" (by default),
                     /"LIN ",
        ◇ CRITERE =/"RELATIF" (by default),
                    /"ABSOLU ",
        # If: (equal_to (" CRITERE ", 'RELATIF'))
            ◇ PRECISION = float (default: 1e-06),
        # If: (equal_to (" CRITERE ", 'ABSOLU'))
            ◆ PRECISION = float,
)

◆: mandatory
◇: optional
: present by default
&: together
/: only one among
|: several possible choices