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url: >-
  /flow/guide/administering-flow/configuring-flow/data-definitions/file-definitions/file-definition/main-screen/partner-identification-tab.md
---

# Partner Identification (File Definition)

::: danger
**Deprecated**\
You should instead use [Custom Script Actions](/flow/guide/administering-flow/configuring-flow/actions/action/action-steps-tab/custom-script-action/) and the [Partner Functions](/flow/guide/scripting-reference/functions/trading-partner/partner) to achieve the same goal.
:::

![](/flow/images/file-definition-partner-identification-.jpg)

### Fields

| Field Name | Description |
|---|---|
| When running an Action use these fields to determine the active trading partner | Enable this to use this function. |
| Selected Field List | This is a list of fields from the file that will be used to determine the active trading partner. Against each field you should select the appropriate trading partner field. |
| File Definition Tree | This displays a list of dataviews and fields specified in the File Definition. You can drag these to the Selected Field List. |