Narutieum Core is the backend responsible for field data collection, storage, APIs, and administrative functions. Narutieum Monitor is the frontend interface used to review and monitor the data accumulated in Core.

GPLv3 stands for GNU General Public License version 3. It allows free use, modification, and redistribution, while requiring the same openness conditions when modified versions are distributed.

1. Narutieum may be used freely

Narutieum may be used by anyone for their own purposes. Individuals, companies, developers, equipment vendors, SI firms, and institutions may use it, modify it, and extend it to fit their field environment.

• Install and run it on an on-site server
• Use it inside a private network for data collection
• Add equipment integration features
• Modify administrative functions
• Change monitoring screens
• Develop skins and plugins
• Earn revenue through installation, customization, maintenance, support, and delivery

This license does not prohibit commercial use. We hope developers apply Narutieum quickly in real field environments and earn fair revenue by adding the functions they need.

2. Separation between Narutieum Core and Monitor

Core and Monitor work together, but are separated by role so developers can modify and extend the system more easily for each field environment.

3. Conditions when distributing or providing it externally

Simply downloading Narutieum and using it internally is allowed. If you modify it only for internal use, no automatic public disclosure duty arises from that alone.

However, if you modify Narutieum and distribute it externally in the form of executables, installation packages, Docker images, or source code, GPLv3 conditions apply.

• You must keep copyright notices and license notices intact.
• Modified or extended versions must remain under GPLv3.
• When distributing, you must provide the corresponding source code or clearly explain how to obtain it.
• If you changed the original Narutieum, you must indicate that it is a modified version.
• You may not impose additional restrictions that block rights already granted by GPLv3.

4. When distributing Docker images

Narutieum considers Docker-based deployment as an important distribution model. GPLv3 conditions still apply even when distribution is done through Docker images.

If you modify Narutieum Core or Monitor and provide Docker images to customers or distribute them externally, you must provide the modified source code included in those images or clearly explain how recipients can obtain it.

• Provide an archive of the modified source code together with the Docker image
• Provide a Git repository URL
• Include LICENSE, COPYING, NOTICE, and SOURCE_INFO in the package

Providing only a runnable Docker image without the corresponding modified source code does not fit the intent of GPLv3.

5. Notes about skins and plugins

Narutieum provides skin and plugin structures so each site can be extended quickly. They are intended for field-specific screens, equipment integration, data presentation, and operational features.

• Parts that directly modify Narutieum Core or Monitor follow GPLv3.
• Plugins tightly coupled with Core are recommended to use GPLv3-compatible licenses.
• Independent modules that only interact externally may use separate licenses.
• Skins and plugins may be sold or delivered commercially.
• Commercial use does not conflict with GPLv3.
• Where GPLv3 applies, source-code obligations must still be respected.

6. Field data and configuration values are not subject to disclosure

GPLv3 applies to the Narutieum software itself. Data collected by using Narutieum, or operational information belonging to customers, does not become public merely because Narutieum is GPLv3 software.

• Data collected from the field
• Equipment configuration values
• Customer operational information
• User account information
• Field content entered into monitoring screens
• Site-specific contract documents
• Operating manuals
• Internal customer materials

In other words, data accumulated through Narutieum is not subject to disclosure because of the Narutieum license. GPLv3 concerns the source code of Narutieum Core and Monitor and the terms for modification and distribution.

7. No warranty

Narutieum is provided without warranty. Problems that arise during use, modification, installation, operation, or field deployment must be reviewed and handled by each user for their own environment.

Narutieum is provided as open software and comes without any guarantee of fitness for a particular purpose or freedom from defects.

8. Why Narutieum chose GPLv3

Narutieum aims to be a Korean CMS for the age of field data. In the AI era, it is important to collect field data continuously, store it well, and prepare it in a structure that AI systems can interpret.

However, field data systems are often difficult to start because of cost, security concerns, and operational burden. Narutieum is opened to lower that barrier.

Developers can apply Narutieum Core and Monitor quickly to real projects and earn revenue by adding the functions they need. At the same time, we want the basic foundation of Narutieum to remain open and continue serving as a starting point for more field environments.

That is why Narutieum Core and Monitor are distributed under GPLv3.