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64 lines
3.3 KiB
64 lines
3.3 KiB
OxRDF I/O
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=========
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[](https://crates.io/crates/oxrdfio)
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[](https://docs.rs/oxrdfio)
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[](https://crates.io/crates/oxrdfio)
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[](https://github.com/oxigraph/oxigraph/actions)
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[](https://gitter.im/oxigraph/community)
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OxRDF I/O is a set of parsers and serializers for RDF.
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It supports:
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* [N3](https://w3c.github.io/N3/spec/) using [`oxttl`](https://crates.io/crates/oxttl)
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* [N-Quads](https://www.w3.org/TR/n-quads/) using [`oxttl`](https://crates.io/crates/oxttl)
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* [N-Triples](https://www.w3.org/TR/n-triples/) using [`oxttl`](https://crates.io/crates/oxttl)
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* [RDF/XML](https://www.w3.org/TR/rdf-syntax-grammar/) using [`oxrdfxml`](https://crates.io/crates/oxrdfxml)
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* [TriG](https://www.w3.org/TR/trig/) using [`oxttl`](https://crates.io/crates/oxttl)
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* [Turtle](https://www.w3.org/TR/turtle/) using [`oxttl`](https://crates.io/crates/oxttl)
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Support for [SPARQL-star](https://w3c.github.io/rdf-star/cg-spec/2021-12-17.html) is also available behind the `rdf-star`feature for [Turtle-star](https://w3c.github.io/rdf-star/cg-spec/2021-12-17.html#turtle-star), [TriG-star](https://w3c.github.io/rdf-star/cg-spec/2021-12-17.html#trig-star), [N-Triples-star](https://w3c.github.io/rdf-star/cg-spec/2021-12-17.html#n-triples-star) and [N-Quads-star](https://w3c.github.io/rdf-star/cg-spec/2021-12-17.html#n-quads-star).
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It is designed as a low level parser compatible with both synchronous and asynchronous I/O (behind the `async-tokio` feature).
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The entry points of this library are the two [`RdfParser`] and [`RdfSerializer`] structs.
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Usage example converting a Turtle file to a N-Triples file:
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```rust
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use oxrdfio::{RdfFormat, RdfParser, RdfSerializer};
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let turtle_file = b"@base <http://example.com/> .
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@prefix schema: <http://schema.org/> .
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<foo> a schema:Person ;
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schema:name \"Foo\" .
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<bar> a schema:Person ;
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schema:name \"Bar\" .";
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let ntriples_file = b"<http://example.com/foo> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://schema.org/Person> .
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<http://example.com/foo> <http://schema.org/name> \"Foo\" .
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<http://example.com/bar> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://schema.org/Person> .
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<http://example.com/bar> <http://schema.org/name> \"Bar\" .
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";
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let mut writer = RdfSerializer::from_format(RdfFormat::NTriples).serialize_to_write(Vec::new());
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for quad in RdfParser::from_format(RdfFormat::Turtle).parse_read(turtle_file.as_ref()) {
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writer.write_quad(&quad.unwrap()).unwrap();
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}
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assert_eq!(writer.finish().unwrap(), ntriples_file);
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```
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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 Oxigraph 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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