csv-split can also stream the data associated with multiple ids, to specific sockets, named pipes or files. See
csv-split --help for more details about the semantics.
You can mix publishing to tcp sockets, local sockets, files, or pipes, if you need.
csv-split works as before (splitting data into files) if no streams are specified. Furthermore if there are streams assigned to some ids and none to
"..." , then the data relating to the remaining ids is discarded.