2. Syntax

nume_ddl = NUME_DDL (
    ◆/MATR_RIGI = matr_elem_pres_c/matr_elem_depl_r/matr_elem_temp_r/matr_elem_depl_c,
      /MODELE = model,
    # If: exists (" MODELE ")
        ◇ CHARGE = char_ther/char_meca/char_acou,
    ◇ INFO =/1 (by default),
             /2,
)

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