DEFINE LOGICAL

        [SIC\]DEFINE LOGICAL Var1[DIM1] Var2[DIM2] [...] [/GLOBAL]

    LOGICAL variables can be multi-dimensional. Up to 7  dimensions  can  be
    specified in the optional DIM field, with the following syntax:
        Var[n1] or Var[n1,n2] etc... up to Var[n1,n2,n3,n4,n5,n6,n7]
    where  Var  is  the  variable name and n1 to n7 are integer constants or
    variables.