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The linked article is about the ISO 8583 standard, which is the international standard for financial transaction card-originated messages. It describes how ISO 8583 defines the structure, format, and content of messages used in transactions between financial institutions, providing a common language for credit card and debit card transactions. The article explains the key elements of the standard, including message types, data elements, and message flow, and how it enables secure and efficient communication between different payment systems.