Bank card originated messages; Interchange message specifications; Content for financial transactions

This document establishes the fundamental architecture for the exchange of financial transaction messages across interconnected banking systems. It defines a comprehensive set of fields and message structures that enable secure, standardized communication between various financial institutions. The content specifies the technical parameters required to process data related to authorization, clearing, and settlement operations, ensuring interoperability among diverse hardware and software platforms. By adopting this framework, organizations can achieve seamless data interchange, reducing errors and enhancing the efficiency of electronic fund transfers. The specification covers both the physical transmission aspects and the logical organization of information elements, providing a unified approach for handling card-based and related transaction requests. Its adoption has facilitated the global expansion of electronic payment networks by creating a common language for financial data exchange. The standard serves as a foundational reference for implementing automated teller machines, point-of-sale terminals, and host systems within the banking sector. Through consistent field definitions and bit allocations, it supports the reliable processing of complex financial operations on a worldwide scale.