Syntax
=====

.. code-block:: text

    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