> This page is for version v2024-12-23.
> For other versions, use one of these documentation indexes:
> - v2026-02-09 (default): https://docs.extend.ai/2026-02-09/llms.txt
> - v2025-04-21: https://docs.extend.ai/2025-04-21/llms.txt
> - v2024-12-23: https://docs.extend.ai/2024-12-23/llms.txt

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.extend.ai/llms.txt
> Use this file to discover all available pages before exploring further.
>
> ## API version
> The current API version is `2026-02-09`, served at the site root (no version prefix in URLs).
> If this page URL contains `/2025-04-21/` or `/2024-12-23/`, you are reading an older API version.
> Prefer the current docs at https://docs.extend.ai/llms.txt unless the user explicitly needs that older version.
> Do not treat older-version pages as the source of truth for new integrations.

# The EvaluationSetItem object

The EvaluationSetItem object represents an item in an evaluation set in Extend. Items are the individual files and expected outputs that are used to evaluate the performance of a given processor in Extend.

#### properties

**`object`** `string`

The type of the object, in this case it will always be "evaluation\_set\_item".

---

**`id`** `string`

The evaluation set item ID.

---

**`evaluationSetId`** `string`

The ID of the evaluation set that this item belongs to.

---

**`fileId`** `string`

The ID of the file associated with this item.

---

**`expectedOutput`** `object`

The expected output of the processor when run against the file.

This should be a JSON object conforming to the [output type schema](/2024-12-23/developers/guides/output-types) of the processor.

---

**`createdAt`** `string`

The date and time the evaluation set item was created.

---

**`updatedAt`** `string`

The date and time the evaluation set item was last updated.

---

**`Example EvaluationSetItem`**

```json Example EvaluationSetItem
{
  "object": "evaluation_set_item",
  "id": "eval_item_1234",
  "evaluationSetId": "eval_set_1234",
  "fileId": "file_1234",
  "expectedOutput": {
    // Output object - see “Processor output types” for details
  },
  "createdAt": "2024-01-01T00:00:00Z",
  "updatedAt": "2024-01-01T00:00:00Z"
}
```