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ISO/IEC 7813 is an international standard codified by the "International Organization for Standardization and "International Electrotechnical Commission that defines properties of financial transaction cards, such as "ATM or "credit cards.
The standard defines:["citation needed]
ISO/IEC 7813 specifies the following physical characteristics of the card, mostly by reference to other standards:["citation needed]
The Track 1 structure is specified as:["citation needed]
The maximum record length is 79 alphanumeric characters.
%B4815881002861896^YATES/EUGENE JOHN ^37829821000123456789?
%B4815881002861896^YATES/EUGENE L ^^^0000000 00998000000?
The Track 2 structure is specified as:["citation needed]
The maximum record length is 40 numeric digits (e.g., 5095700000000).["citation needed]
Track 3 is virtually unused by the major worldwide networks and often isn't even physically present on the card by virtue of a narrower magnetic stripe.["citation needed]
A notable exception to this is Germany, where Track 3 content was used nationally as the primary source of authorization and clearing information for debit card processing prior to the adoption of the "SECCOS" ICC standards. Track 3 is standardized nationally to contain both the cardholder's bank account number and branch sort code (BLZ).["citation needed]
Parsing Track 1 and Track 2 can be done with "Regular Expressions. Included here is just the "Regular Expression for parsing Track 1.["citation needed]
This "Regex will capture all of the important fields into the following groups:["citation needed]