What is the dataflow set in the NetFlow flow-record format?

While NetFlow data is transmitted in binary, describing a dataflow set as specifically a "collection of HEX records" is inaccurate; it is a structured collection of flow records.

Basic information about the NetFlow version and other export details are typically part of the "Template Flow Set" or the header of the NetFlow export packet, not the "Data Flow Set" itself.

"Collection of binary patterns" is too vague and inaccurate; it's a structured collection of actual flow data.

In NetFlow v9 and IPFIX, a "Data Flow Set" is a conceptual container used to group one or more "Data Records" (which describe the actual network flows) together for efficient transmission.