2. Syntax

LISS_SPECTRE (
    ◆ SPECTRE = _F (
         ◆/TABLE = table,
           /NAPPE = tablecloth,
         ◇ ELARG = float,
         # If: exists (" NAPPE ")
             ◆ DIRECTION =/"X",
                           /"Y",
                           /"Z",
                           /"H",
             ◆ NOM = text,
             ◇ BATIMENT = text,
             ◇ COMMENTAIRE = text,
      ),
    ◆ OPTION =/"VERIFICATION ",
               /"CONCEPTION ",
    ◇ FREQ_MIN = float,
    ◇ FREQ_MAX = float,
    ◇ NB_FREQ_LISS = int (default: 10),
    ◇ ZPA = float,
    ◇ BORNE_X = float,
    ◇ BORNE_Y = float,
    ◇ ECHELLE_X =/"LIN" (by default),
                  /"LOG ",
    ◇ ECHELLE_Y =/"LIN" (by default),
                  /"LOG ",
    ◇ LEGENDE_X = text,
    ◇ LEGENDE_Y = text,
)

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