oxigraph/lib/oxrdfio

OxRDF I/O

OxRDF I/O is a set of parsers and serializers for RDF.

It supports:

• N3 using oxttl
• N-Quads using oxttl
• N-Triples using oxttl
• RDF/XML using oxrdfxml
• TriG using oxttl
• Turtle using oxttl

Support for SPARQL-star is also available behind the rdf-starfeature for Turtle-star, TriG-star, N-Triples-star and 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:

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