If no input is specified, the Batch Processor will assume the input in csv and look for a directory named "csv". You can explicitly specify csv data and the directory to get that data from by using the --csv <directory> command line option, or using the <csv>directory</cv> in the configuration file.
For more information, see Configure the Batch Processor.
An example of the command linefollows:
java -jar determinations-batch.jar --rulebase SimpleBenefits.zip --csv "./data/csv_in" --output "./data/csv_out"