# ST-NMG-009 - Prefix Datatable Variables

> **Rule ID**: `ST-NMG-009`

**Rule ID**: `ST-NMG-009`

**Scope**: Activity

## Description

This rule checks whether the names of `DataTable` variables defined in the workflow with the type `DataTable` start with the `dt_` prefix.

## Recommendation

Make sure the names of existing `DataTable` variables start with the `dt_` prefix.

![docs image](https://dev-assets.cms.uipath.com/assets/images/studio/studio-docs-image-166596-1453fa28.webp)
