---
title: Manage Nodes
slug: litmusedge-v2/ydGP-product-features/opc-ua-server/hierarchy/data-type-mapping
description: Learn how to manage nodes in the OPC hierarchy. 
docTags: 
createdAt: 2022-09-26T14:14:57.000Z
---

You can manage nodes by navigating to **OPC **>** Hierarchy**. Refer to the image and callouts for management options. 

![](https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/yDbxaUh2BerFCAXbkyIja_image.png "Management options for nodes")

| **Action**                    | **Details**                                                                                                                                                                                                                                                                             |
| ----------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| \[1] **Show filter**          | Search for nodes.                                                                                                                                                                                                                                                                       |
| \[2] **Remove selected node** | After confirming the removal of the node from the *Hierarchy *pane, click the **Save **icon. After saving the update, you must restart the OPC UA server. See [Manage the OPC UA Server](docId\:QIOGHk9PBo5nQxux7cfUw) to learn more.                               |
| \[3] **Reset hierarchy**      | Resetting the hierarchy removes all the nodes in the hierarchy. After confirming the reset of the hierarchy, click the **Save **icon. After saving the update, you must Reset the OPC UA server. See [Manage the OPC UA Server](docId\:QIOGHk9PBo5nQxux7cfUw) to learn more.  |
| \[4] **Export as JSON**       | Open the **Action menu** to export the hierarchy exports all of the nodes in the hierarchy to a JSON file and download it to your hard drive. A hierarchy must exist in the *Hierarchy *pane to view this option.                                                             |
| \[5] **Import JSON**          | Open the **Action menu** to import all the nodes from a JSON file. The imported nodes merge with the existing hierarchy rather than replace it. After saving the update, you must Reset the OPC UA server. See [Manage the OPC UA Server](docId\:QIOGHk9PBo5nQxux7cfUw) to learn more.  |

:::hint{type="warning"}
**Caution**: All child nodes and their configurations are deleted when you remove a selected node.
:::