> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Parameter

> The Parameter interface — a single named transaction parameter with a name, read-only flag, and value.

`Parameter` represents a single transaction parameter — its name, value, and whether it can be modified.

## Properties

| Name           | Type    | Access     | Description                           |
| :------------- | :------ | :--------- | :------------------------------------ |
| **Name**       | string  | Read-only  | The name of the parameter.            |
| **IsReadOnly** | boolean | Read-write | `true` if the parameter is read-only. |
| **Value**      | string  | Read-write | The value of the parameter.           |

## Related topics

<CardGroup cols={2}>
  <Card title="Transaction" icon="exchange" href="/vantage/documentation/skill-designer/process/custom-activity/transaction">
    The current transaction and access to all of its documents.
  </Card>

  <Card title="Object model" icon="diagram-project" href="/vantage/documentation/skill-designer/process/custom-activity/object-model">
    Full JavaScript object reference for Custom activity scripts.
  </Card>
</CardGroup>