RDF.XSD.Datatype.derived_from-question-mark

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

Specs

derived_from?(t()) :: boolean()

Checks if the RDF.XSD.Datatype is directly or indirectly derived from the given RDF.XSD.Datatype.

Note that this is just a basic datatype reflection function on the module level and does not work with RDF.Literals. See RDF.Literal.Datatype.datatype?/1 instead.