Triple class

Represents an RDF triple.

A triple is the atomic unit of data in RDF, consisting of three components:

  • subject: The resource being described (IRI or BlankNode)
  • predicate: The property or relationship (always an IRI)
  • object: The value or related resource (IRI, BlankNode, or Literal)

Triple data structures implement the constraints of the RDF data model using Dart's type system to ensure that only valid RDF statements can be created. The type system enforces that:

  • Subjects can only be IRIs or blank nodes
  • Predicates can only be IRIs
  • Objects can be IRIs, blank nodes, or literals

Example in Turtle syntax:

# A triple stating that "John has the name 'John Smith'"
<http://example.com/john> <http://xmlns.com/foaf/0.1/name> "John Smith" .

# A triple stating that "John knows Jane"
<http://example.com/john> <http://xmlns.com/foaf/0.1/knows> <http://example.com/jane> .

Constructors

Triple(RdfSubject subject, RdfPredicate predicate, RdfObject object)
Creates a new triple with the specified subject, predicate, and object.

Properties

hashCode → int
The hash code for this object.
no setteroverride
object → RdfObject
The object of the triple, representing the value or related resource.
final
predicate → RdfPredicate
The predicate of the triple, representing the property or relationship.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
subject → RdfSubject
The subject of the triple, representing the resource being described.
final

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
Returns a string representation of the triple in a Turtle-like syntax.
override

Operators

operator ==(Object other) → bool
The equality operator.
override