Function load_turtle_text 

pub fn load_turtle_text(
    path: &Path,
    ontology_id: &str,
    source_text: &str,
    quads: &[Quad],
    namespaces: &BTreeMap<String, String>,
) -> Result<OwlLoadResult>

Load Turtle source via Oxigraph quads → RDF/XML → Horned-OWL.