Wikidata redirects defined on Q-id to be an alias for another Q-id. This should be reflected by a owl:sameAs relationship between the respective entity URIs (but not the document URIs). The Document URI of the redirect could have rdf:type wikibase:Redirect or something similar.
This is needed to allow references to entities that were turned into redirects/aliases to be handled correctly by rdf consumers like triple stores.
NOTE: T69033 calls for redirects to item X to be included in the output for item X. That would imply all redirects would be present in an RDF dump. The straight forward implementation would be very inefficient though (it would mean looking up redirects for each entity). Instead, we should omit that lookup in dump mode, and process redirects as they appear in the ID stream that drives the dump output.