Fork of https://github.com/oxigraph/oxigraph.git for the purpose of NextGraph project
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93 lines
5.4 KiB
93 lines
5.4 KiB
Oxigraph
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========
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[](https://github.com/oxigraph/oxigraph/actions)
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[](https://gitter.im/oxigraph/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
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Oxigraph is a work in progress graph database implementing the [SPARQL](https://www.w3.org/TR/sparql11-overview/) standard.
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There is no released version yet.
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Its goal is to provide a compliant, safe and fast graph database based on the [RocksDB](https://rocksdb.org/) key-value store.
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It is written in Rust.
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It is split into multiple parts:
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* The `lib` directory contains the database written as a Rust library.
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* The `js` directory contains bindings to use Oxigraph in JavaScript with the help of WebAssembly. See [its README](https://github.com/oxigraph/oxigraph/blob/master/js/README.md) for the JS bindings documentation.
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* The `server` directory contains a stand-alone binary of a web server implementing the [SPARQL 1.1 Protocol](https://www.w3.org/TR/sparql11-protocol/).
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* The `wikibase` directory contains a stand-alone binary of a web server able to synchronize with a [Wikibase instance](https://wikiba.se/).
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Are currently implemented:
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* [SPARQL 1.1 Query](https://www.w3.org/TR/sparql11-query/) except `FROM` and `FROM NAMED`.
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* [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).
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* [SPARQL Query Results XML Format](http://www.w3.org/TR/rdf-sparql-XMLres/) and [SPARQL Query Results JSON Format](https://www.w3.org/TR/sparql11-results-json/).
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A preliminary benchmark [is provided](bench/README.md).
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## Run the web server
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### Build
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You need to have [a recent stable version of Rust and Cargo installed](https://www.rust-lang.org/tools/install). You also need [clang](https://clang.llvm.org/) to build RocksDB.
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If it's done, executing `cargo build --release` in the root directory of this repository should compile the full server after having downloaded its dependencies.
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It will create a fat binary in `target/release/oxigraph_server`.
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### Usage
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Run `./oxigraph_server` to start the server. It listen by default on `localhost:7878`.
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The server provides an HTML UI with a form to execute SPARQL requests.
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It provides the following REST actions:
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* `/` allows to `POST` data to the server.
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For example `curl -f -X POST -H 'Content-Type:application/n-triples' --data-binary "@MY_FILE.nt" http://localhost:7878/`
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will add the N-Triples file MY_FILE.nt to the server repository. [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/) are supported.
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* `/query` allows to evaluate SPARQL queries against the server repository following the [SPARQL 1.1 Protocol](https://www.w3.org/TR/sparql11-protocol/#query-operation).
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For example `curl -X POST -H 'Content-Type:application/sparql-query' --data 'SELECT * WHERE { ?s ?p ?o } LIMIT 10' http://localhost:7878/query`.
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This action supports content negotiation and could return [Turtle](https://www.w3.org/TR/turtle/), [N-Triples](https://www.w3.org/TR/n-triples/), [RDF XML](https://www.w3.org/TR/rdf-syntax-grammar/), [SPARQL Query Results XML Format](http://www.w3.org/TR/rdf-sparql-XMLres/) and [SPARQL Query Results JSON Format](https://www.w3.org/TR/sparql11-results-json/).
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Use `oxigraph_server --help` to see the possible options when starting the server.
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## Run the web server for Wikibase
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### Build
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You need to have [a recent stable version of Rust and Cargo installed](https://www.rust-lang.org/tools/install).
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If it's done, executing `cargo build --release` in the root directory of this repository should compile the full server after having downloaded its dependencies.
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It will create a fat binary in `target/release/oxigraph_wikibase`.
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### Usage
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To start a server that is synchronized with [test.wikidata.org](https://test.wikidata.org) you should run:
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```bash
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./oxigraph_wikibase --mediawiki_api=https://test.wikidata.org/w/api.php --mediawiki_base_url=https://test.wikidata.org/wiki/ --namespaces=0,120 --file=test.wikidata
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```
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It creates a SPARQL endpoint listening to `localhost:7878/query` that could be queried just like Blazegraph.
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The configuration parameters are:
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* `mediawiki_api` URL of the MediaWiki API to use
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* `mediawiki_base_url` Base URL of MediaWiki pages like `https://test.wikidata.org/wiki/` for test.wikidata.org or `http://localhost/w/index.php?title=` for "vanilla" installations.
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* `namespaces` The ids of the Wikibase namespaces to synchronize with, separated by `,`.
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* `file` Path of where Oxigraph should store its data.
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## License
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This project is licensed under either of
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* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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http://www.apache.org/licenses/LICENSE-2.0)
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* MIT license ([LICENSE-MIT](LICENSE-MIT) or
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http://opensource.org/licenses/MIT)
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at your option.
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### Contribution
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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.
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