You have to create two workflows. The first workflow simply loops thru your input file (e.g. ".csv" file), and sends one record at a time to a second workflow. This second workflow does your heavy lifting. When you create the input schema using the schema generator for the first workflow, be sure you have more than one record in your file. This will create a schema that recognizes multiple rows. The output schema of this main workflow will only be for a single record, and will be the same schema that starts off your sub-workflow. Simply configure your main workflow's call to loop thru the records.
Hope this helps.
Keith
Hope this helps.
Keith