2. Syntax

interspectrum = CALC_INTE_SPEC (
    ◇ INST_INIT = float,
    ◆ INST_FIN = float,
    ◇ DUREE_ANALYSE = float,
    ◇ DUREE_DECALAGE = float,
    ◆ NB_POIN = int,
    ◆ FONCTION = formula/tablecloth/function,
    ◇ TITRE = text,
    ◇ INFO =/1 (by default),
             /2,
)

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