Oxigraph Wikibase

Oxigraph Wikibase is a SPARQL web server able to synchronize with a Wikibase instance. It is based on Oxigraph.

Oxigraph and Oxigraph Wikibase are in heavy development and not been optimized yet.

Installation

You need to have a recent stable version of Rust and Cargo installed. You also need clang to build RocksDB.

To download, build and install the latest released version run cargo install oxigraph_wikibase. There is no need to clone the git repository.

To compile the server from source, clone this git repository, and execute cargo build --release in the wikibase directory to compile the full server after having downloaded its dependencies. It will create a fat binary in target/release/oxigraph_wikibase.

Usage

To start a server that is synchronized with test.wikidata.org you should run:

./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

It creates a SPARQL endpoint listening to localhost:7878/query that could be queried just like Blazegraph.

The configuration parameters are:

• mediawiki_api URL of the MediaWiki API to use

• 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.

• namespaces The ids of the Wikibase namespaces to synchronize with, separated by ,.

• file Path of where Oxigraph should store its data.

You can then access it from your machine on port 7878. No GUI is provided.

# Make a query
curl -X POST -H 'Accept: application/sparql-results+json' -H 'Content-Type: application/sparql-query' --data 'SELECT * WHERE { ?s ?p ?o } LIMIT 10' http://localhost:7878/query

Using a Docker image

Display the help menu

docker run --rm oxigraph/oxigraph-wikibase --help

Run the Web server

Expose the server on port 7878 of the host machine, and save data on the local ./data folder

docker run --init --rm -v $PWD/wikibase_data:/wikibase_data -p 7878:7878 oxigraph/oxigraph-wikibase -b 0.0.0.0:7878 -f /wikibase_data --mediawiki-api http://some.wikibase.instance/w/api.php --mediawiki-base-url http://some.wikibase.instance/wiki/

Warning: the Wikibase instance needs to be accessible from within the container. The clean way to do that could be to have both your wikibase and oxigraph_wikibase in the same docker-compose.yml.

You could easily build your own Docker image by running docker build -t oxigraph-wikibase -f wikibase/Dockerfile . from the root directory.

License

This project is licensed under either of

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