Missouri EDI File Matrix is a system used by the state of Missouri to manage and organize Electronic Data Interchange (EDI) transactions. EDI is an electronic data exchange method used to transmit business documents such as invoices, purchase orders, and shipment notifications between two or more trading partners. The Missouri EDI File Matrix is a tool that helps businesses in Missouri to process EDI transactions and ensure that the information is accurate. The Missouri EDI File Matrix is divided into three main types: Standard, Proprietary, and Custom. The Standard EDI File Matrix defines the basic format of EDI documents used in Missouri. The Proprietary EDI File Matrix contains specific information needed to process EDI transactions for a particular company. Finally, the Custom EDI File Matrix allows businesses to specify their own data elements and format. The Missouri EDI File Matrix is an important tool for businesses to ensure accurate and secure EDI transactions in the state.