OxRDF I/O is a set of parsers and serializers for RDF.
It supports:
* [N3](https://w3c.github.io/N3/spec/) using [`oxttl`](https://crates.io/crates/oxttl)
* [N-Quads](https://www.w3.org/TR/n-quads/) using [`oxttl`](https://crates.io/crates/oxttl)
* [N-Triples](https://www.w3.org/TR/n-triples/) using [`oxttl`](https://crates.io/crates/oxttl)
* [RDF/XML](https://www.w3.org/TR/rdf-syntax-grammar/) using [`oxrdfxml`](https://crates.io/crates/oxrdfxml)
* [TriG](https://www.w3.org/TR/trig/) using [`oxttl`](https://crates.io/crates/oxttl)
* [Turtle](https://www.w3.org/TR/turtle/) using [`oxttl`](https://crates.io/crates/oxttl)
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).
It is designed as a low level parser compatible with both synchronous and asynchronous I/O (behind the `async-tokio` feature).
Usage example counting the number of people in a Turtle file:
```rust
use oxrdf::{NamedNodeRef, vocab::rdf};
use oxrdfio::{RdfFormat, RdfParser};
let file = b"@base <http://example.com/> .
@prefix schema: <http://schema.org/> .
<foo> a schema:Person ;
schema:name \"Foo\" .
<bar> a schema:Person ;
schema:name \"Bar\" .";
let schema_person = NamedNodeRef::new("http://schema.org/Person").unwrap();
let mut count = 0;
for quad in RdfParser::from_format(RdfFormat::Turtle).parse_read(file.as_ref()) {
let quad = quad.unwrap();
if quad.predicate == rdf::TYPE && quad.object == schema_person.into() {
count += 1;
}
}
assert_eq!(2, count);
```
## 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.
