2. Syntax

field_no = CALC_CHAR_SEISME (
    ◆ MATR_MASS = matr_asse_depl_r,
    ◆ DIRECTION = float,
    ◆/MONO_APPUI = "OUI" (or not specified),
      /MODE_STAT = meca fashion,
    # If: exists (" MODE_STAT ")
        ◆ GROUP_NO = grno,
    ◇ TITRE = text,
)

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