# HEIMDALL

> free software for converting more easily one or more databases from one format to another

**Wikidata**: [Q135155542](https://www.wikidata.org/wiki/Q135155542)  
**Source**: https://4ort.xyz/entity/heimdall

## Summary
HEIMDALL is free software designed to simplify the process of converting one or more databases from one format to another. It is written in Python, operates across multiple platforms, and is distributed under the GNU Affero General Public License. The tool provides a command-line interface for database migration tasks.

## Key Facts
- **License**: GNU Affero General Public License, version 3.0 or later.
- **Programming Language**: Built with Python.
- **Release History**: Initial stable version 1.0 released on December 24, 2024; version 1.1 released on April 30, 2025.
- **Cross-Platform Compatibility**: Runs on multiple operating systems.
- **Source Code Repository**: Hosted on GitLab at [https://gitlab.huma-num.fr/datasphere/heimdall/](https://gitlab.huma-num.fr/datasphere/heimdall/).
- **User Interface**: Utilizes a command-line interface (CLI).
- **Documentation**: Available at [https://datasphere.readthedocs.io/projects/heimdall/](https://datasphere.readthedocs.io/projects/heimdall/).
- **Aliases**: Referenced as "Heimdall" or "pyheimdall" (PyPI project name).

## FAQs
### Q: What is HEIMDALL used for?
A: HEIMDALL is used to convert databases from one format to another, streamlining data migration tasks across different systems.

### Q: Is HEIMDALL free to use?
A: Yes, HEIMDALL is free software licensed under the GNU Affero General Public License, allowing users to run, modify, and distribute the software.

### Q: What programming language is HEIMDALL written in?
A: HEIMDALL is developed using Python, a general-purpose programming language first released in 1991.

## Why It Matters
HEIMDALL addresses a critical need in data management by simplifying database conversions, a task often complicated by proprietary formats and technical barriers. As free and open-source software, it promotes accessibility and collaboration, enabling users to adapt the tool to diverse workflows without licensing restrictions. Its cross-platform design ensures compatibility with various operating systems, making it a versatile solution for individuals, organizations, and projects requiring flexible data migration. By reducing the friction in database transitions, HEIMDALL supports data interoperability and preservation, particularly within academic or research contexts where transparent and reproducible data handling is essential.

## Notable For
- **Command-Line Focus**: Provides a lightweight, scriptable interface for automated or batch database conversions.
- **Python Ecosystem Integration**: Leverages Python’s extensive libraries and community support for extensibility.
- **Strong Copyleft Licensing**: Uses the GNU Affero GPL to ensure derivative works remain open-source.
- **Cross-Platform Functionality**: Operates consistently across Windows, macOS, and Linux environments.
- **Academic Affiliation**: Hosted on a GitLab instance tied to Huma-Num, a French research infrastructure, indicating alignment with scholarly data management needs.

## Body
### Overview
HEIMDALL is a free software tool developed to facilitate database format conversions. It is part of the Datasphere ecosystem, as indicated by its documentation hosted on Read the Docs. The software prioritizes usability and flexibility, catering to users who need to migrate databases without specialized technical expertise.

### Licensing
The tool is licensed under the GNU Affero General Public License (AGPL) version 3.0 or later, a copyleft license that requires derivative works to be distributed under the same terms. This ensures that modifications to HEIMDALL remain accessible to the public.

### Technical Details
- **Programming Language**: Built exclusively with Python, leveraging its simplicity and extensive library support.
- **Interface**: Operates via a command-line interface (CLI), enabling integration into scripts or automated workflows.
- **Cross-Platform Support**: Compatible with multiple operating systems, including Windows, macOS, and Linux.

### Versions
- **1.0**: Initial stable release on December 24, 2024.
- **1.1**: Subsequent stable release on April 30, 2025, indicating active maintenance and development.

### Development
HEIMDALL’s source code is hosted on a GitLab repository managed by Huma-Num, a French organization supporting digital humanities and social sciences. This affiliation suggests the tool’s development is informed by academic and research-oriented use cases. The project adheres to open-source principles, with contributions and feedback likely encouraged through the GitLab platform.

## References

1. [releases](https://gitlab.huma-num.fr/datasphere/heimdall/python/-/releases)