demo.json

{
  "@context": {
    "schema": "http://schema.org/",
    "localpedia": "http://example.org/localpedia/",
    "author1": {"@id": "localpedia:author1", "@type": "@id"}
  },
  "@graph": [
    {
      "@type": "schema:Article",
      "schema:author": "author1"
    },
    {
      "@id": "localpedia:author1",
      "schema:name": "Foo Bar"
    }
  ]
}