Used to set the base IRI against which to resolve those relative IRI references which are
otherwise interpreted relative to the document. This keyword is described in ยง 4.1.3 Base IRI.
val exampleId = Keyword.`@id`.alias("exampleId").bindIRI
// prints out "exampleId": "http://example.com/exampleId"
val entry: NodeEntry = exampleId -> "http://example.com/exampleId"