# Knowledge Graph Toolkit

> software for exploring and searching a knowledge graph of Wikidata size on a commodity hardware

**Wikidata**: [Q108739856](https://www.wikidata.org/wiki/Q108739856)  
**Source**: https://4ort.xyz/entity/knowledge-graph-toolkit

## Summary
Knowledge Graph Toolkit (KGTK) is free software designed for exploring and searching knowledge graphs comparable in size to Wikidata using commodity hardware. Developed in Python and distributed under the MIT License, it functions as an Extract, Transform, Load (ETL) framework for graphs and Resource Description Framework (RDF) data.

## Key Facts
- **Aliases:** KGTK
- **License:** MIT License
- **Programming Language:** Python
- **Instance Of:** Free software
- **Primary Use:** Exploring and searching massive knowledge graphs on commodity hardware; ETL framework.
- **Initial Release:** Version 0.1.0 released on April 28, 2020.
- **Latest Recorded Version:** Version 1.0.1 released on October 23, 2021.
- **Software Component:** Uses Jupyter notebook files.
- **Source Repository:** https://github.com/usc-isi-i2/kgtk
- **Documentation:** https://kgtk.readthedocs.io/en/latest/

## FAQs
### Q: What is the primary function of Knowledge Graph Toolkit (KGTK)?
A: KGTK is software used for exploring, searching, and analyzing knowledge graphs that are as large as Wikidata. It is specifically optimized to run on commodity hardware rather than requiring specialized high-performance computing infrastructure.

### Q: Is Knowledge Graph Toolkit free to use?
A: Yes, KGTK is classified as free software released under the MIT License. This allows users to freely run, study, change, and distribute the software and its modified versions.

### Q: What programming language is KGTK written in?
A: The toolkit is written in Python. It also utilizes Jupyter notebook files for its operations.

### Q: When was the first version of KGTK released?
A: The earliest version listed in the release history is version 0.1.0, which was published on April 28, 2020.

## Why It Matters
Knowledge Graph Toolkit represents a significant advancement in the accessibility of large-scale data science. Handling knowledge graphs the size of Wikidata—billions of facts—traditionally requires distributed computing clusters or specialized, expensive hardware. KGTK solves this problem by providing a powerful Python-based framework capable of exploring and searching these massive datasets on standard commodity hardware. This lowers the barrier to entry for researchers and developers, democratizing access to linked data and semantic web technologies.

Furthermore, KGTK serves as a robust Extract, Transform, Load (ETL) framework for Resource Description Framework (RDF) data and general graphs. By offering a standardized toolkit for these processes, it streamlines the complex workflows often associated with graph data management. Its integration with Jupyter notebooks further enhances its utility in academic and scientific settings, allowing for reproducible, document-driven analysis of complex graph relationships.

## Notable For
- **Scalability on Commodity Hardware:** Specifically engineered to process knowledge graphs the size of Wikidata without requiring specialized enterprise hardware.
- **Comprehensive ETL Framework:** Provides a full suite of tools for extracting, transforming, and loading graph data and RDF resources.
- **Open Source Accessibility:** Distributed under the MIT License, encouraging wide adoption and modification within the developer community.
- **Rapid Development Cycle:** Released multiple versions (0.1.0 through 1.0.1) frequently between April 2020 and October 2021.

## Body

### Overview and Capabilities
Knowledge Graph Toolkit (KGTK) is a Python-based software solution classified as free software. It is designed to facilitate the manipulation of large-scale graph data. Its core capability lies in exploring and searching knowledge graphs that reach the scale of Wikidata, a feat it achieves on standard commodity hardware. The toolkit functions as a versatile framework for handling graphs, Resource Description Framework (RDF) data, and Extract, Transform, Load (ETL) processes.

### Technical Specifications
- **Programming Language:** Python
- **License:** MIT License
- **Interface:** Utilizes Jupyter notebook files
- **Copyright Status:** Copyrighted
- **Main Subjects:** Knowledge graph, Toolkit, Resource Description Framework, Graph, Extract, Transform, Load framework

### Version History
The development of KGTK has been tracked through numerous releases, indicating an active maintenance schedule starting in 2020.
- **v0.1.0:** Released April 28, 2020.
- **v0.2.0:** Released May 21, 2020.
- **v0.5.0:** Released December 9, 2020.
- **v1.0.1:** Released October 23, 2021 (Latest listed version).

### Resources and Links
- **Official Website:** https://github.com/usc-isi-i2/kgtk/
- **Documentation:** https://kgtk.readthedocs.io/en/latest/
- **Browser Tool:** https://kgtk.isi.edu/browser/Q2013
- **Issue Tracker:** https://github.com/usc-isi-i2/kgtk/issues
- **Logo:** Available via Wikimedia Commons (Kgtk_logo_800x800.png).

## References

1. [Source](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.0.1)
2. [Release 0.1.0. 2020](https://github.com/usc-isi-i2/kgtk/releases/tag/0.1.0)
3. [Release 0.1.1. 2020](https://github.com/usc-isi-i2/kgtk/releases/tag/0.1.1)
4. [Release 0.2.0. 2020](https://github.com/usc-isi-i2/kgtk/releases/tag/v0.2.0)
5. [Release 0.2.1. 2020](https://github.com/usc-isi-i2/kgtk/releases/tag/v0.2.1)
6. [Release 0.3.2. 2020](https://github.com/usc-isi-i2/kgtk/releases/tag/0.3.2)
7. [Release 0.4.0. 2020](https://github.com/usc-isi-i2/kgtk/releases/tag/0.4.0)
8. [Release 0.5.0. 2020](https://github.com/usc-isi-i2/kgtk/releases/tag/0.5.0)
9. [Release 0.6.0. 2021](https://github.com/usc-isi-i2/kgtk/releases/tag/0.6.0)
10. [Release 0.7.0. 2021](https://github.com/usc-isi-i2/kgtk/releases/tag/0.7.0)
11. [Release 0.7.1. 2021](https://github.com/usc-isi-i2/kgtk/releases/tag/0.7.1)
12. [Release 1.0.0. 2021](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.0.0)
13. [Release 1.1.0. 2021](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.1.0)
14. [Release 1.1.1. 2021](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.1.1)
15. [Release 1.2.2. 2022](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.2.2)
16. [Release 1.2.3. 2022](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.2.3)
17. [Release 1.3.0. 2022](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.3.0)
18. [Release 1.4.0. 2022](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.4.0)
19. [Release 1.4.1. 2022](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.4.1)
20. [Release 1.4.2. 2022](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.4.2)
21. [Release 1.4.3. 2022](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.4.3)
22. [Release 1.5.0. 2022](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.5.0)
23. [Release 1.5.1. 2022](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.5.1)
24. [Release 1.5.2. 2022](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.5.2)
25. [Release 1.5.3. 2023](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.5.3)
26. [Release 1.5.4. 2023](https://github.com/usc-isi-i2/kgtk/releases/tag/v1.5.4)
27. [Source](https://kgtk.readthedocs.io/en/dev/)
28. [KGTK documentation](https://kgtk.readthedocs.io/en/latest/)