LiteralTerm class
Literal value in RDF
Literals represent values like strings, numbers, dates, etc. Each literal has a lexical value (string) and a datatype IRI that defines how to interpret the string. Additionally, string literals can have language tags.
Literals can only appear in the object position of a triple, never as subjects or predicates.
In RDF 1.1, all literals have a datatype:
- Plain literals use xsd:string by default
- Language-tagged literals use rdf:langString
- Typed literals use an explicit datatype IRI (typically an XSD datatype)
Examples in Turtle syntax:
- Simple string:
"Hello World" - Typed number:
"42"^^xsd:integer - Language-tagged string:
"Hello"@en
Constructors
- LiteralTerm(String value, {IriTerm? datatype, String? language})
-
Creates a literal with an optional datatype or language tag
const
- LiteralTerm.boolean(bool value)
-
Create a boolean literal
factory
- LiteralTerm.decimal(double value)
-
Create a decimal literal
factory
- LiteralTerm.integer(int value)
-
Create an integer literal
factory
- LiteralTerm.string(String value)
-
Create a plain string literal
factory
- LiteralTerm.typed(String value, String xsdType)
-
Create a typed literal with XSD datatype
factory
- LiteralTerm.withLanguage(String value, String langTag)
-
Create a language-tagged literal
factory
Properties
- datatype → IriTerm
-
The datatype IRI defining the literal's type
final
- hashCode → int
-
Provides a consistent hash code for this literal term based on its components.
no setteroverride
- language → String?
-
Optional language tag for language-tagged string literals
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- value → String
-
The lexical value of the literal as a string
final
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
Returns a string representation of this literal term in a Turtle-like syntax.
override
Operators
-
operator ==(
Object other) → bool -
Compares this literal term with another object for equality.
override