jsonld-ex/test/data/json-ld.org-test-suite/frame-0004-frame.jsonld

{
  "@context": {
    "dc": "http://purl.org/dc/elements/1.1/",
    "ex": "http://example.org/vocab#",
    "ex:contains": {"@type": "@id"}
  },
  "@type": "ex:Library"
}