---
title: "Creating an OPC-UA Tag"
slug: "creating-an-opc-ua-tag"
updated: 2024-09-24T15:09:52Z
published: 2024-09-24T15:09:52Z
canonical: "docs.ai-op.com/creating-an-opc-ua-tag"
---

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

# Creating an OPC-UA Tag

After [creating a tag](/v1/docs/adding-a-device-general) and selecting an OPC-UA device, you will be expected to fill out the following fields:

![](https://cdn.document360.io/9fab5c8f-2756-48da-b963-232bd8533649/Images/Documentation/image(60).png)

#### Device Browser

The device browser allows you to view a list of OPC-UA nodes and identifiers from the server. Click the browse button to show the `OPC-UA Tag Browser`. Nodes indicated with a folder will contain other nodes within. Nodes indicated with a tag icon are able to be read by Koios. Click on a tag to populate the form automatically.

![](https://cdn.document360.io/9fab5c8f-2756-48da-b963-232bd8533649/Images/Documentation/image(62).png)

*When using a device set, use the dropdown to select the server you want to browse.*

#### Namespace

The namespace associated with the OPC-UA identifier.

*More info:* [*https://reference.opcfoundation.org/DI/v102/docs/11.2*](https://reference.opcfoundation.org/DI/v102/docs/11.2)

#### Identifier Type

The datatype of the OPC-UA identifier.

*More info:* [*https://reference.opcfoundation.org/Core/Part3/v104/docs/8.2.3*](https://reference.opcfoundation.org/Core/Part3/v104/docs/8.2.3)

#### Identifier

The node identifier used to reference the tag.

*More info:* [*https://opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%27s%20Guide%20and%20Reference-QuickOPC/OPC%20UA%20Node%20IDs.html*](https://opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%27s%20Guide%20and%20Reference-QuickOPC/OPC%20UA%20Node%20IDs.html)

#### Data Type

The OPC-UA data type used to read and write to the tag.

*More info:* [*https://reference.opcfoundation.org/Core/Part6/v104/docs/5.1.2*](https://reference.opcfoundation.org/Core/Part6/v104/docs/5.1.2)

> [!NOTE]
> We all float down here
> 
> The prediction from a Koios AI model is always output as floating point and then converted to the data type defined. We currently only support converting to floats, integers, booleans, and strings.