sds_id	IN:	Data set identifier returned by SDcreate and SDselect
	sds_name	OUT:	Name of the data set
	rank	OUT:	Number of dimensions in the data set
	dimsizes	OUT:	Array containing the size of each dimension in the data set
	data_type	OUT:	Data type for the data stored in the data set
	num_attrs	OUT:	Number of attributes for the data set

	Purpose	Retrieves the name, rank, dimension sizes, data type and number of attributes for a data set.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	SDgetinfo retrieves the name, number of dimensions, sizes of dimensions, data type, and number of attributes of the data set identified by sds_id, and stores them in the parameters sds_name, rank, dimsizes, data_type, and num_attrs, respectively.
		The buffer sds_name can have at most 64 characters. If the name of the data set is not desired, then the parameter sds_name can be set to NULL in C and an empty string in Fortran.
		The maximum value of the rank parameter is MAX_VAR_DIMS (or 32).
		If the data set is created with an unlimited dimension, then in the C interface, the first element of the dimsizes array (corresponding to the slowest-changing dimension) contains the number of records in the unlimited dimension; in the FORTRAN-77 interface, the last element of the dimsizes array (corresponding to the slowest-changing dimension) contains this information. Use SDisrecord to determine if the data set has an unlimited dimension.

	FORTRAN	integer function sfginfo(sds_id, sds_name, rank, dimsizes, data_type, num_attrs)
		character*(*) sds_name
		integer sds_id, rank, dimsizes(*)
		integer data_type, num_attrs