what you trying to do?
- Running a data load rule from Batch definition?
- Running open batch rule (single period) from Batch Script?
To run open batch from batch script (command line) you would have to use command:
runbatch USER PASSWORD BATCH_NAME
Period is specified in the filename similar to FDM classic. I say similar because you have now an additional naming convention for the file in the case you want to use an existing data load rule. If you specify the DLR in the filename you don't have to specify category as it's implicitly defined in the rule name.
Everything is documented in section Batch Processing
I hope that clarifies.