RDF.Literal.Datatype.datatype-question-mark

You're seeing just the callback datatype-question-mark, go back to RDF.Literal.Datatype module for more information.

Specs

datatype?(RDF.Literal.t() | t() | literal()) :: boolean()

Checks if the given RDF.Literal has the datatype for which the RDF.Literal.Datatype is implemented or is derived from it.

Example

iex> RDF.XSD.byte(42) |> RDF.XSD.Integer.datatype?()
true