> For the complete documentation index, see [llms.txt](https://docs.payments.thalescloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payments.thalescloud.io/home/cloud-tsp-detokenization-api/data-elements-presence.md).

# Data Elements Presence

## List of Data Elements in ISO Messages

The following table shows the presence of each field across the four ISO messages.

| Field | Description                                              | 1100 | 1110       | 1120 | 1130       |
| ----- | -------------------------------------------------------- | ---- | ---------- | ---- | ---------- |
| 02    | Primary Account Number — **Token value**                 | M    | C5, C4, C1 |      |            |
| 02    | Primary Account Number — **PAN value**                   |      |            | M    | C5, C4, C1 |
| 03    | Processing Code                                          | M    | —          | M    | —          |
| 04    | Transaction Amount                                       | M    | —          | M    | —          |
| 07    | Transaction Date and Time                                | M    | —          | M    | —          |
| 12    | Date and Time Local Transaction                          | O    | C9         | O    | C9         |
| 14    | Expiration Date — **Token Expiration Date**              | M    | C5, C4, C1 |      |            |
| 14    | Expiration Date — **PAN Expiration Date**                |      |            | M    | C5, C4, C1 |
| 18    | Merchant Type                                            | M\*  | —          | M\*  | —          |
| 19    | Acquiring Institution Country Code                       | M\*  | —          | M\*  | —          |
| 22    | POS Data                                                 | M    | —          | M    | —          |
| 23    | Card Sequence Number                                     | C6   | —          | O    | —          |
| 35    | Track2 Data — **Token-based PAN + token CVV**            | O    | C3, C4     |      |            |
| 35    | Track2 Data — **Accurate PAN + PAN CVV**                 |      |            | —    |            |
| 37    | Retrieval Reference Number                               | M    | C8         | M    | C8         |
| 39    | Action/Response Code — **TSP processing result**         | —    | M          |      | M          |
| 39    | Action/Response Code — **Issuer Authorization Response** |      |            | M    |            |
| 42    | Card Acceptor Identification Code                        | M\*  | —          | M\*  | —          |
| 43    | Card Acceptor Name and Address                           | M    | —          | M    | —          |
| 48    | Additional Data, Private                                 | M    | M          | M    | M          |
| 49    | Transaction Currency Code                                | M    | —          | M    | —          |
| 55    | Chip Related Data                                        | C2   | —          | —    | —          |
| 56    | Token Related Data                                       | —    | C7         | —    | C7         |
| 64    | Message Authentication Code (MAC)                        | M    | M          | M    | M          |

### Field Presence Legend

| Code    | Meaning                                                                                                                                                                            |
| ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **M**   | Mandatory                                                                                                                                                                          |
| **M\*** | Currently mandatory. Proposal: may be removed or made optional if unused.                                                                                                          |
| **O**   | Optional                                                                                                                                                                           |
| **—**   | Not present                                                                                                                                                                        |
| **C1**  | Present only when Cloud TSP processed the request without error.                                                                                                                   |
| **C2**  | Required when transaction uses a chip payment application (Field 22 pos. 1 = `05`, `07` or `08`), except for "Type 2" transactions (see section 6.1.1) where presence is optional. |
| **C3**  | Present when Track2 Data is in the 1100 message. Value is either the echoed PAN from the request or the detokenized PAN.                                                           |
| **C4**  | Must be set to the value of the equivalent parameter present in the 1110 de-tokenization response.                                                                                 |
| **C5**  | Always present. Value may be either the echoed request value or the PAN-related value from detokenization.                                                                         |
| **C6**  | Presence recommended when Field 55 is present (when not present, TSP uses `'00'` default in cryptographic algorithm).                                                              |
| **C7**  | Presence depends on project business requirements.                                                                                                                                 |
| **C8**  | Presence depends on project business requirements.                                                                                                                                 |
| **C9**  | Present in response if present in request; value is verbatim.                                                                                                                      |


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