dim_id	IN:	Dimension identifier returned by SDgetdimid
	label	IN:	Label (predefined attribute)
	unit	IN:	Unit (predefined attribute)
	format	IN:	Format (predefined attribute)

	Purpose	Sets the predefined attribute of a dimension.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	SDsetdimstrs sets the predefined attribute (label, unit, and format) for a dimension and its scale to the values specified in the parameters label, unit and format. If a parameter is set to NULL in C and an empty string in Fortran, then the attribute corresponding to that parameter will not be written. For more information about predefined attributes, refer to Section 3.10 of the HDF User's Guide.

	FORTRAN	integer function sfsdmstr(dim_id, label, unit, format)
		integer dim_id
		character*(*) label, unit, format