Oxigraph
========

[![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)
[![PyPI](https://img.shields.io/pypi/v/pyoxigraph)](https://pypi.org/project/pyoxigraph/)
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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 [Sled](https://sled.rs/) 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.

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://oxigraph.org/pyoxigraph/). Its source code is in the `python` directory. [![PyPI](https://img.shields.io/pypi/v/pyoxigraph)](https://pypi.org/project/pyoxigraph/)
* [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) 
[![Docker Image Version (latest semver)](https://img.shields.io/docker/v/oxigraph/oxigraph?sort=semver)](https://hub.docker.com/repository/docker/oxigraph/oxigraph)
* [Oxigraph Wikibase](https://crates.io/crates/oxigraph_wikibase), a web server able to synchronize with a [Wikibase instance](https://wikiba.se/). Its source code is in the `wikibase` directory.
[![Latest Version](https://img.shields.io/crates/v/oxigraph_wikibase.svg)](https://crates.io/crates/oxigraph_wikibase)
[![Docker Image Version (latest semver)](https://img.shields.io/docker/v/oxigraph/oxigraph-wikibase?sort=semver)](https://hub.docker.com/repository/docker/oxigraph/oxigraph-wikibase)

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](http://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).


## 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 Futures by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.