dim	IN:	Dimension the label, unit, and format refer to
	label_len	OUT:	Length of the label
	unit_len	OUT:	Length of the unit
	format_len	OUT:	Length of the format

	Purpose	Retrieves the length of the label, unit, and format attribute strings associated with the specified dimension.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	The space allocated to hold the label, unit, and format strings must be at least one byte larger than the actual length of the string, to account for the null termination.

	FORTRAN	integer function dsgdiln(dim, label_len, unit_len, format_len)
		integer dim, label_len, unit_len, format_len