Module rdftk_core::statement

This module provides types for the RDF Statement (triple) concept.

1. A statement comprises a subject, a predicate, and an object.
2. A subject may be a blank (unnamed) node, an IRI (named node), or a statement reference according to RDF-star.
3. A predicate is an IRI.
4. An object may be a blank (unnamed) node, an IRI (named node), a literal value, or a statement reference according to RDF-star.
5. A literal has a string-like lexical form and may have an asserted data type or a language identifier.

Example

use rdftk_core::{Statement, SubjectNode, ObjectNode};
use rdftk_core::statement::StatementList;
use rdftk_iri::IRI;
use std::rc::Rc;
use std::str::FromStr;

let mut statements: StatementList = Default::default();

statements.push(Statement::new_ref(
    SubjectNode::from(IRI::from_str("http://en.wikipedia.org/wiki/Tony_Benn").unwrap()).into(),
    IRI::from_str("http://purl.org/dc/elements/1.1/title").unwrap().into(),
    ObjectNode::literal_str("Tony Benn").into(),
));

Structs

ObjectNode	An object node may be another resource, or a literal value. In this way graphs can easily be made using resource links.
Statement	A statement comprises a subject, a predicate, and an object.
SubjectNode	A subject node anchors one or more statements in a graph such that all statements with a common subject are considered to be statements about the same thing.

Type Definitions

ObjectNodeRef	The actual object storage type, reference counted for memory management.
StatementList	A list of statements, this can be used to pass non-graph sets of statements.
StatementRef	The actual statement storage type, reference counted for memory management.
SubjectNodeRef	The actual subject storage type, reference counted for memory management.