# RDF Delta

> system to propagate changes between RDF Datasets

**Wikidata**: [Q110853896](https://www.wikidata.org/wiki/Q110853896)  
**Source**: https://4ort.xyz/entity/rdf-delta

## Summary
RDF Delta is a free software system designed to propagate changes between RDF Datasets. Created by Andy Seaborne and built using Apache Jena, it provides a mechanism for managing and synchronizing data modifications across different database instances.

## Key Facts
- **Definition:** A system to propagate changes between RDF Datasets.
- **Creator:** Andy Seaborne.
- **Inception:** June 29, 2016.
- **License:** Apache Software License 2.0.
- **Software Class:** Free software; instance of a software application.
- **Framework:** Uses Apache Jena.
- **Initial Release:** Version 0.1.0 released on October 31, 2017.
- **Source Repository:** Hosted on GitHub at `https://github.com/afs/rdf-delta`.
- **Website:** `https://afs.github.io/rdf-delta/`.

## FAQs
### Q: What is the primary function of RDF Delta?
A: RDF Delta is designed to propagate changes between RDF Datasets. It allows systems to track, manage, and sync modifications made to Resource Description Framework data.

### Q: Who created RDF Delta and when was it started?
A: RDF Delta was created by Andy Seaborne. The project's inception date is recorded as June 29, 2016.

### Q: What software framework does RDF Delta rely on?
A: RDF Delta utilizes Apache Jena, a free and open-source Java framework for building Semantic Web and Linked Data applications.

## Why It Matters
RDF Delta addresses a critical challenge in the management of Semantic Web data: synchronization. In environments where RDF Datasets are distributed or replicated, maintaining consistency without an efficient change-log mechanism is difficult. By propagating changes specifically between datasets, RDF Delta acts as a coordination layer for linked data.

This capability is essential for building resilient applications that rely on the Resource Description Framework, as it bridges the gap between static data storage and dynamic data updates. Its integration with Apache Jena makes it particularly relevant for developers working within that ecosystem, providing a standardized, open-source method (under the Apache 2.0 license) to handle data evolution. The tool effectively enables versioning and patch management for graph data, facilitating easier deployment and scaling of RDF-based systems.

## Notable For
- **Change Propagation:** Specifically engineered to handle the transmission of deltas (changes) between RDF Datasets.
- **Apache Jena Integration:** Built to function within the widely used Apache Jena framework.
- **Open Source:** Distributed under the permissive Apache Software License 2.0, classifying it as free software.
- **Active Development History:** Demonstrates a detailed release timeline, including nine distinct versions logged between October 2017 and September 2018.

## Body

### Overview and Classification
RDF Delta is a system categorized as free software. Its core utility lies in its ability to propagate changes between RDF Datasets. It operates within the domain of the Resource Description Framework (RDF) and serves as a facet of RDF database management. The software is copyrighted but distributed freely under the Apache Software License 2.0.

### Development and Timeline
The project was initiated by Andy Seaborne on June 29, 2016. The codebase is maintained in a public repository on GitHub.

Following its inception, the project saw multiple releases:
- **v0.1.0:** The first tagged release appeared on October 31, 2017.
- **v0.2.0:** Released January 29, 2018.
- **v0.3.0:** Released April 12, 2018.
- **v0.4.0:** Released May 26, 2018.
- **v0.5.0 through v0.5.5:** A series of rapid updates occurred throughout the summer and early autumn of 2018, with the last recorded version in the provided data (v0.5.5) released on September 22, 2018.

### Technical Specifications
The system relies on **Apache Jena**, a Java framework for Semantic Web applications. The official website, available in English, is hosted at `https://afs.github.io/rdf-delta/`, and the source code is accessible at `https://github.com/afs/rdf-delta`.

## References

1. [Release 0.1.0. 2017](https://github.com/afs/rdf-delta/releases/tag/v0.1.0)
2. [Release 0.2.0. 2018](https://github.com/afs/rdf-delta/releases/tag/v0.2.0)
3. [Release 0.3.0. 2018](https://github.com/afs/rdf-delta/releases/tag/v0.3.0)
4. [Release 0.4.0. 2018](https://github.com/afs/rdf-delta/releases/tag/v0.4.0)
5. [Release 0.5.0. 2018](https://github.com/afs/rdf-delta/releases/tag/v0.5.0)
6. [Release 0.5.1. 2018](https://github.com/afs/rdf-delta/releases/tag/v0.5.1)
7. [Release 0.5.2. 2018](https://github.com/afs/rdf-delta/releases/tag/v0.5.2)
8. [Release 0.5.3. 2018](https://github.com/afs/rdf-delta/releases/tag/v0.5.3)
9. [Release 0.5.4. 2018](https://github.com/afs/rdf-delta/releases/tag/v0.5.4)
10. [Release 0.5.5. 2018](https://github.com/afs/rdf-delta/releases/tag/v0.5.5)
11. [Release 0.5.6. 2018](https://github.com/afs/rdf-delta/releases/tag/v0.5.6)
12. [Release 0.5.7. 2018](https://github.com/afs/rdf-delta/releases/tag/v0.5.7)
13. [Release 0.6.0. 2018](https://github.com/afs/rdf-delta/releases/tag/v0.6.0)
14. [Release 0.7.0. 2019](https://github.com/afs/rdf-delta/releases/tag/v0.7.0)
15. [Release 0.8.0. 2019](https://github.com/afs/rdf-delta/releases/tag/v0.8.0)
16. [Release 0.8.1. 2019](https://github.com/afs/rdf-delta/releases/tag/v0.8.1)
17. [Release 0.8.2. 2019](https://github.com/afs/rdf-delta/releases/tag/v0.8.2)
18. [Release 0.9.0. 2020](https://github.com/afs/rdf-delta/releases/tag/v0.9.0)
19. [Release 0.9.1. 2021](https://github.com/afs/rdf-delta/releases/tag/v0.9.1)
20. [Release 0.9.2. 2021](https://github.com/afs/rdf-delta/releases/tag/v0.9.2)
21. [Release 1.0.0. 2021](https://github.com/afs/rdf-delta/releases/tag/v1.0.0)
22. [Release 1.0.1. 2021](https://github.com/afs/rdf-delta/releases/tag/v1.0.1)
23. [Release 1.0.2. 2021](https://github.com/afs/rdf-delta/releases/tag/v1.0.2)
24. [Release 1.1.0. 2021](https://github.com/afs/rdf-delta/releases/tag/v1.1.0)
25. [Release 1.1.1. 2022](https://github.com/afs/rdf-delta/releases/tag/v1.1.1)
26. [Release 1.1.2. 2022](https://github.com/afs/rdf-delta/releases/tag/v1.1.2)
27. [Source](https://github.com/afs/rdf-delta/commit/b3ea82cff839ebafe4e15ff3a70f0ab316600cbd)