> For the complete documentation index, see [llms.txt](https://developer.magtek.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-shared-tlv-data-objects.md).

# Data Types/Shared TLV Data Objects

This section describes the primitive and composed data types referred to throughout this document.This section of the DynaFlex II Go Programmer's Manual defines the primitive and composed data types, TLV (Tag-Length-Value) data objects, file structures, and cryptographic key formats used throughout the device command set, including track data, display strings, EMV configuration file types (ARQC, ARPC, Batch, CA Public Keys), security parameters, TR‑31 key blocks, certificate and CSR file structures, and card emulation.Subsections

<table data-card-size="large" data-view="cards"><thead><tr><th></th></tr></thead><tbody><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/primitive-data-types"><mark style="color:$primary;"><strong>Primitive Data Types ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/about-track-data"><mark style="color:$primary;"><strong>About Track Data ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/display-strings"><mark style="color:$primary;"><strong>Display Strings ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/encryption-type"><mark style="color:$primary;"><strong>Encryption Type ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/emv-arqc-type"><mark style="color:$primary;"><strong>EMV ARQC Type ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/emv-arpc-type"><mark style="color:$primary;"><strong>EMV ARPC Data ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/emv-batch-data-type"><mark style="color:$primary;"><strong>EMV Batch Data Type ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/emv-processing-configuration-file-type"><mark style="color:$primary;"><strong>EMV Processing Configuration File Type ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/emv-entry-point-configuration-file-type"><mark style="color:$primary;"><strong>EMV Entry Point Configuration File Type ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/emv-configuration-ca-public-keys-file-type"><mark style="color:$primary;"><strong>EMV Configuration CA Public Keys File Type ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/emv-american-express-drl-configuration-file-type-not-supported-on-expresspay-4.x"><mark style="color:$primary;"><strong>EMV American Express DRL Configuration File Type ></strong></mark> </a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/security-operation-type"><mark style="color:$primary;"><strong>Security Operation Type ></strong></mark> </a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/security-parameters-type"><mark style="color:$primary;"><strong>Security Parameters Type ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/key-information-type"><mark style="color:$primary;"><strong>Key Information Type ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/nfc-uid-type-emv-contactless-only"><mark style="color:$primary;"><strong>NFC UID Type (EMV Contactless Only) ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/gpo-response-type-emv-contactless-only"><mark style="color:$primary;"><strong>GPO Response Type (EMV Contactless Only ) ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/tr-31-key-block-type"><mark style="color:$primary;"><strong>TR-31 Key Block Type ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/common-file-structure"><mark style="color:$primary;"><strong>Common File Structure ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/certificate-file-types"><mark style="color:$primary;"><strong>Certificate File Types ></strong></mark></a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/certificate-signing-request-csr-file-types"><mark style="color:$primary;"><strong>CSR File Types ></strong></mark> </a></td></tr><tr><td><a href="https://developer.magtek.com/hardware/card-readers/mms-dyna-devices/emv-common-kernel/dynaflex-ii-go/documents/developers-manuals/programmers-manual-commands/data-types-and-shared-tlv-data-objects/card-emulation"><mark style="color:$primary;"><strong>Card Emulation ></strong></mark></a></td></tr></tbody></table>

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