Message structure
DE 65
Extended bitmap indicator
- Base format
b 1
Signals that an additional bitmap range follows in profiles that support data elements beyond DE 128. It is a structural indicator rather than business transaction data.
Scheme specifics
Public evidence and current limits
Status describes the evidence we have reviewed. It is not a mandatory, optional, or N/A classification.
| Scheme | Evidence | What the public source supports |
|---|---|---|
| Visa | Restricted source | The selected public sources do not establish a complete current Base I/V.I.P. profile for this field. |
| Mastercard | Restricted source | The complete current dual-message definition is located in the Mastercard Customer Interface Specification. |
| American Express | Restricted source | Current authorization layouts and programming notes are participant Network Specifications in the American Express Knowledge Base.American Express Global Network Policy |
Provenance
Sources used on this page
- Wikipedia ISO 8583 field directory, revision 1352601145Secondary base source · CC BY-SA 4.0 · Public transcription of the ISO 8583:1987 field directory and format notation.
- ISO 8583:2023Official context · Current edition metadata; field and value definitions are maintained separately by the ISO 8583 Maintenance Agency.
- PCI SSC account-data classification guidancePCI Security Standards Council · Cardholder-data and sensitive-authentication-data classification context.
- American Express Global Network PolicyAmerican Express official · access context · Confirms that current authorization message layouts and programming notes are participant Network Specifications.
The base field row is attributed to Wikipedia under CC BY-SA 4.0. SchemeLens descriptions are independent summaries. Restricted network specifications are named as the missing authoritative layer, not copied or reconstructed.