oxigraph/README.md

# Oxigraph

[![Latest Version](https://img.shields.io/crates/v/oxigraph.svg)](https://crates.io/crates/oxigraph)
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Oxigraph is a graph database implementing the [SPARQL](https://www.w3.org/TR/sparql11-overview/) standard.

Its goal is to provide a compliant, safe, and fast graph database based on the [RocksDB](https://rocksdb.org/) key-value store.
It is written in Rust.
It also provides a set of utility functions for reading, writing, and processing RDF files.

Oxigraph is in heavy development and SPARQL query evaluation has not been optimized yet.
The development roadmap is using [GitHub milestones](https://github.com/oxigraph/oxigraph/milestones?direction=desc&sort=completeness&state=open).
Oxigraph internal design [is described on the wiki](https://github.com/oxigraph/oxigraph/wiki/Architecture).

The future 0.4 release is currently in development in the [next branch](https://github.com/oxigraph/oxigraph/tree/next).

It is split into multiple parts:

- [The database written as a Rust library](https://crates.io/crates/oxigraph). Its source code is in the `lib` directory.
  [![Latest Version](https://img.shields.io/crates/v/oxigraph.svg)](https://crates.io/crates/oxigraph)
  [![Released API docs](https://docs.rs/oxigraph/badge.svg)](https://docs.rs/oxigraph)
- [`pyoxigraph` that exposes Oxigraph to the Python world](https://pyoxigraph.readthedocs.io/). Its source code is in the `python` directory. [![PyPI](https://img.shields.io/pypi/v/pyoxigraph)](https://pypi.org/project/pyoxigraph/)
- [JavaScript bindings for Oxigraph](https://www.npmjs.com/package/oxigraph). WebAssembly is used to package Oxigraph into a NodeJS compatible NPM package. Its source code is in the `js` directory.
  [![npm](https://img.shields.io/npm/v/oxigraph)](https://www.npmjs.com/package/oxigraph)
- [Oxigraph server](https://crates.io/crates/oxigraph_server) that provides a standalone binary of a web server implementing the [SPARQL 1.1 Protocol](https://www.w3.org/TR/sparql11-protocol/) and the [SPARQL 1.1 Graph Store Protocol](https://www.w3.org/TR/sparql11-http-rdf-update/). Its source code is in the `server` directory.
  [![Latest Version](https://img.shields.io/crates/v/oxigraph_server.svg)](https://crates.io/crates/oxigraph_server)

Oxigraph implements the following specifications:

- [SPARQL 1.1 Query](https://www.w3.org/TR/sparql11-query/), [SPARQL 1.1 Update](https://www.w3.org/TR/sparql11-update/), and [SPARQL 1.1 Federated Query](https://www.w3.org/TR/sparql11-federated-query/).
- [Turtle](https://www.w3.org/TR/turtle/), [TriG](https://www.w3.org/TR/trig/), [N-Triples](https://www.w3.org/TR/n-triples/), [N-Quads](https://www.w3.org/TR/n-quads/), and [RDF XML](https://www.w3.org/TR/rdf-syntax-grammar/) RDF serialization formats for both data ingestion and retrieval using the [Rio library](https://github.com/oxigraph/rio).
- [SPARQL Query Results XML Format](https://www.w3.org/TR/rdf-sparql-XMLres/), [SPARQL 1.1 Query Results JSON Format](https://www.w3.org/TR/sparql11-results-json/) and [SPARQL 1.1 Query Results CSV and TSV Formats](https://www.w3.org/TR/sparql11-results-csv-tsv/).

A preliminary benchmark [is provided](bench/README.md). There is also [a document describing Oxigraph technical architecture](https://github.com/oxigraph/oxigraph/wiki/Architecture).

When cloning this codebase, don't forget to clone the submodules using
`git clone --recursive https://github.com/oxigraph/oxigraph.git` to clone the repository including submodules or
`git submodule update --init` to add the submodules to the already cloned repository.


## Help

Feel free to use [GitHub discussions](https://github.com/oxigraph/oxigraph/discussions) or [the Gitter chat](https://gitter.im/oxigraph/community) to ask questions or talk about Oxigraph.
[Bug reports](https://github.com/oxigraph/oxigraph/issues) are also very welcome.

If you need advanced support or are willing to pay to get some extra features, feel free to reach out to [Tpt](https://github.com/Tpt/).


## License

This project is licensed under either of

- Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
  http://www.apache.org/licenses/LICENSE-2.0)
- MIT license ([LICENSE-MIT](LICENSE-MIT) or
  http://opensource.org/licenses/MIT)

at your option.

### Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Oxigraph by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.


## Sponsors

* [RelationLabs](https://relationlabs.ai/) that is building [Relation-Graph](https://github.com/relationlabs/Relation-Graph), a SPARQL database module for the [Substrate blockchain platform](https://substrate.io/) based on Oxigraph.
* [Field 33](https://field33.com) that is building [an ontology management plateform](https://plow.pm/).
* [Magnus Bakken](https://github.com/magbak) who is building [chrontext](https://github.com/magbak/chrontext), providing a SPARQL query endpoint on top of joint RDF and time series databases.
* [ACE IoT Solutions](https://aceiotsolutions.com/), a building IOT platform.
* [Albin Larsson](https://byabbe.se/) who is building [GovDirectory](https://www.govdirectory.org/), a directory of public agencies based on Wikidata.

And [others](https://github.com/sponsors/Tpt). Many thanks to them!