The input source is a tiny X12/EDI file that contains just one transaction of function group "CT" and transaction set code "831", which is Application Control Totals. Just for reference, here are some other related transaction set codes:
| 810 | IN | Invoice |
| 816 | OR | Organizational Relationships |
| 820 | RA | Payment Order/Remittance Advice |
| 823 | LB | Lockbox |
| 824 | AG | Application Advice |
| 830 | PS | Planning Schedule with Release Capability |
| 831 | CT | Application Control Totals |
| 832 | SC | Price/Sales Catalog |
| 835 | HP | Health Care Claim Payment/Advice |
| 840 | RQ | Request for Quotation |
| 842 | NC | Nonconformance Report |
| 843 | RR | Response to Request for Quotation |
| 844 | CF | Product Transfer Account Adjustment |
| 846 | IB | Inventory Inquiry/Advice |
| 849 | CF | Response to Product Transfer Account Adjustment |
| 850 | PO | Purchase Order |
| 852 | PD | Product Activity Data |
| 855 | PR | Purchase Order Acknowledgment |
| 856 | SH | Ship Notice/Manifest |
| 857 | BS | Shipment and Billing Notice |
| 861 | RC | Receiving Advice/Acceptance Certificate |
| 867 | PT | Product Transfer and Resale |
| 870 | RS | Order Status Information |
| 885 | UA | Retail Account Characteristics |
| 997 | FA | Functional Acknowledgment |