RDF.Triple.valid-question-mark

You're seeing just the function valid-question-mark, go back to RDF.Triple module for more information.

Specs

valid?(t() | any()) :: boolean()

Checks if the given tuple is a valid RDF triple.

The elements of a valid RDF triple must be RDF terms. On the subject position only IRIs and blank nodes allowed, while on the predicate position only IRIs allowed. The object position can be any RDF term.