      \fitem{size}(x:\vValue): if \code{x} is a scalar value, it return
      a strictly negative integer related to the type of the argument
      (that is, two scalar values of the same type gives the same
      result). If it is a map or a tab, it returns the number of element
      in its argument (which is a positive integer). If it is a nim, it
      returns the number of breakpoints of the nim (which is not the
      dimension of the nim). Note that a nim with zero breakpoints is
      the result of a wrong definition.

      %%% -------------------------------------------------------

