schema:sameAs should be URI or string?

[saumier]

All schema:sameAs property values will be converted to URIs in Artsdata when they enter as strings via the Artsdata Databus.

see https://schema.org/docs/jsonldcontext.jsonld

curl -I https://schema.org -->

HTTP/2 200
access-control-expose-headers: Link
link: </docs/jsonldcontext.jsonld>; rel="alternate"; type="application/ld+json"

curl https://schema.org/docs/jsonldcontext.jsonld --> JSON-LD containing the context for schema.org.

In the context of schema.org the sameAs property is defined as
"sameAs": { "@id": "schema:sameAs", "@type": "@id"}

[saumier]

Answer is that schema:sameAs should be a URI.