Retrieves the data type of the next dataset to be read.
Return value
Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
Description
Note that DFSDgetNT does not take a file name as an argument. As a result, a DFSD call to initialize the file information structures is required before calling DFSDgetNT. One such call is DFSDgetdims.
Valid values for data_type are of the general form DFNT_. The following are valid symbolic names and their data types: